Tm 5-1280 Mobile Pugmill Mixing Plant

7/30/2019 Tm 5-1280 Mobile Pugmill Mixing Plant

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PLANT

ER

MDRYER

RATIONUNIT

VATOR

Y

RDERS56600

lied

onlyifposi-

partnum-

NS.

si-

ne,nameof

ze,manufac-

chmachine

edtomachine,

essoriesfor

red.

nemakeor

quisition.

lespacedto

ationswhen

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icDomain,Google-digitized

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2/476

ManualandPartsCatalog.

ePlant,publishedbythe

ishedfortheinformation

ned.

June10,1941.)

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3/476

PLANT

ER

MDRYER

RATIONUNIT

VATOR

01

-GreeneParts..537-1

enanceandpartslists

gengine.

sorySectionParts8S6-XX

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M

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...15

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Mixer

alinconjunctionwith831Dryerand831

nconjunctionwith821Soil Unit

5tonsper hourinbituminousmixing.

rhourInstabilized mixing.

th21'-0"

ollyortruck-tractor.')

s

.inchesat55 Ibspressure.

ailingAxle-10,200Iba.

y -3,800Ibs.

mbled-Approximately1765cu.ft.

,000cu.Ft.

ximately)

sperFlatCar(Assembledorassembledand boxed)

NY,Aurora,Illinois


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9/476

Dryer

minousmixinginconjunctionwith831

5tonsper hour

th-24'-10"

yor truck-Tractor

q.inchesat 55lbs.pressure

ilingAxle-9,500lbs.

y -5,000lbs.

mbled-2,000Cu.Ft.

2250Cu.Ft.

sperFlatCar(Assembledorassembledand boxed)

NY,Aurora,Illinois


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0CONSUMPTION

e


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SoilPreparationUnit

ngclaysoilaggregateinconjunction

Mixer.

rhour.

yor Truck-Tractor

q.inches at55lbs.pressure

y -4900lbs.

andboxed)

NY,Aurora,Illinois


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BucketElevator

opperson821Soil PreparationUnitor831

gorclaysoil aggregatepreparation.

rhour.

Axle-usedwith TowingPintle

s

inchesat55lbs.pressure.

ailingAxle2900lbs.

ge- NotBoxed

bled-500 Cu.Ft.

lat Car

andboxed)

NDCONSUMPTION

NY,Aurora,Illinois


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be anelementary,non-technicalinstruction

rber-Greenemobilepavingmachines.Before

ptionoftheoperationand careofthesemach-

ereadertohavea generalunderstandingof

abrief knowledgeofthevariouspavingmix-

elves.

nedtoprepareandmix varioustypesofpaving

portantthatthe personinchargenotonly

eoperationofthesemachines,butalsoto be

rypavingmixturesuitedtotheparticularjob

le,andtobeable tosetthemachinesto get

ectiondevotedtoconstructionmaterialsis

thecommonmaterialswithonlyenoughin-

theinexperiencedoperatortousethem incon-

s.Iffurtherinformationis desired,itcan

rces.

gnedespeciallyformaintenanceandrepairwork,

sed mostlyforsimple,durablemixessuchas

ctionandsoil-aggregateconstruction.Since

siblyrepairingand fillingholesinroads

illnotbe setuplongat oneJobsite.

yself-contained,areofsemi-trailerdesignto

are easytosetup,requiringonly abrief

canbegin.Theoperationof theplantsis^

eideaof speedandsimplicityfortheset-

cessfuluniformflowofmixedmaterial.Ver-

sincethe plantscanhandlealmostanykind

littlechangenecessary.However,formain-

is usuallydesiredtoutilizethematerials

nynecessarymaterialwhichis lacking,toget

cussion,weshall referonlytothistype of

describingtheplants.

onweaddsmallmeasuredquantitiesofbituminous

proportionedmixtureofaggregate(sand,

toget apermanent,waterproofedtrafficsur-

afficabrasion.

structionweaddsoilorclay andwatertotheprop-

alow costmixtureofhighstability.This

sabasefor abituminoussurfacemat,where

blethatitis unabletosupporttraffic.Of

uctioncanbeusedfor thesamepurpose,but

untof materialisused,itis desirabletouse

outdependingupona limitedsupplyofasphalt,

ctioncomesintousewheneverpossible.

hesetwodifferentmixesis ofcoursequite

ntmachinestoprocessthem.However,inboth

isathoroughmixingtogetherofall themat-

onemachine,thereforethismachineis used

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he841 MIXERariditsbasicunitis atwinset

pugmill.Herethe bituminousmaterial

oil-aggregateconstruction)issprayedonthe

portionedaggregateandthoroughlymixedtoget

mixture.

nunitin theBituminousmixingplantsetupis

Thebasicpart ofthisunitis alarge,rotating

teisheatedanddried asitpassesthrough.

bituminousconstructionbecauseofthepecul-

hepresenceofmoisture-it willnotadhere

.The831 DRYERalsoservesanotherpurpose,

mountsofthe aggregateasitisfed intothe

order togetastable mixturewhichwillhold

ngplantsetuptheprimaryor preparationunit

PREPARATIONUNIT.Herethesoil (clay)is

izedbycrusherrollsso thatitwillbe mixed

gateinthe841 MIXER.Inadditiontheaggregate

31DRYERbutthedryingprocessis eliminated,

quiredtohelp spreadtheclayparticles

makethefinishedmixwetenoughtocompact

outthevariousmixturesand thesettingof

esemixtures,letus familiarizeourselveswith

theactionofthematerialsas theypass

PPERDRUMBURNERCONVEYORPU6MILL5PRAY8ARTRUCK

nof theBituminousplantbyfollowingtheflow

ntcancombinetwodifferentsizesof agg-

tion.Or,ifonlyonesizeis availablewhich

sofsandandgravelto worksatisfactorily,

all referinthisdiscussionto twosizes,

a bankrungravelcontainingsand,couldbe

gatesarestockpiledinfront ofthe831port-

hchargesthehopperofthe831 DRYER.This

esforthe separatehandlingoftwosizes.

aggregatesintothe buckets,beingassistedby

ercontrolleddragscoopswhichpullin themat-

ckedupby thebucketsanddumpedintothediv-

opperhasa platefeederforabasewhich

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nmeasuringgatesintotheDRYERdrum.

tingin acontrolled,measuredfeedofmat-

ndentlycontrolledsothat differentamounts

dfromthetwohoppersat thesametime,allow-

drumrotatesslowly,beingtilted onaslight

hopperendsothe aggregatewillpassthrough.

flights areboltedsothatwhenthe drumrot-

cked upfromthebottomofthe drumandlet

ot gasesfromtheburner.In thiswaythe

by thetimethematerialhaspassedcomplete-

sbeenheatedanddried.Thepreparedand

thendropoutthroughthedischargechuteonto the

nveyor.

heaggregateletus lookattheheatingsystem

heatedbyanair-oilatomizedflamefromthe

ablowerunitonwhichan oilpumpismounted

etank.Anexhausterfanunderneaththestack

ethroughthe drumandouttheexhauststack.

afterpassingthroughthedischarge chuteis

othe twinshaftpugmillbythebelt conveyor.

t issprayedwithbitumenfromanozzle

menisfurnishedbya meteringpumpwhich

he spraybarfromthestoragetankonthe

narethenmixedthoroughlytogetherin thepug-

tatingpaddlesonthe twinshaftswhich

lthroughthemill anddischargeitthrougha

use.

1DRYERtheaggregatesareproportionedand

ERbitumenisaddedandthe materialsaremix-

ANT

PPERCRUSHERCONVEYORP06MIU.SPRAYBARTRUCK

ofthe Soil-Aggregateplant,letusagain

gatesthroughthe machines.Rememberinthis

setup,theplantisconstructedto combinetwo

eandclaysoil butifonesize ofaggregateis

atisfactorilysimplyuseit inbothsidesof

gatesarestockpiled infrontofthe 831port-

hisused tochargethehopperofthe 821SOIL

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accomplishedinthesamemannerasin the

theuseofmen withshovelsandthepowerdrag-

oppersimiliartotheDRYERhopper,havinga

rasabasewhichfeedsmateri;1 outthroughthe

ggregatefallsdirectlyonto the841MIXER

gthesand andgravel,the821SOILPREPARATION

yandpulverizesit soitcanbe mixed.The

l hopperwhichhasabar-chainfeederonthe

youtthrougha controllablegateontoasmall

theclayanddropsitintoa roll-crusher.These

eclay lumpswhichfallontothe841MIXER

sandandgravel.(SeeDiagram)

onedclay,sand,andgravelthenare carried

anddumpedinasbefore.Asthe paddlesmix

terisaddedasr equiredtospreadtheclay

togetthecorrectamountofmoisturein the

eadandrolledit willcompacttoadense

xwhichis moistenoughtoholdtogether

esloppy.Thewateris pumpedthroughspray-

centrifugalwaterpump,buttheamountadded

s.

1SOILPREPARATIONUNIT,theaggregatesare

measuredandprepared;theninthe841 MIXER,

terialsare mixedtogethertogeta uniform,

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TION

tuminousandSoil

tionofAggregates.17

regates18

portioning

thBituminousMaterials.20

Tars20

lculations32

thClaySoils34

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is togivethereaderenoughinformationabout

ethodsnecessarytotheoperationoftheplant.Add-

obtainedfromothersources,oneofwhichis the

ngMaterialsHandbook,givinggeneralinformation.A

tled"MaterialsandMethodsforMilitaryAirportCon-

especiallyfortheconstructionofairports,butit

ofdefinitions,principles,specificationsandterm-

erialsandtypesof mixesnecessaryforcomplete

eseplantswillbeoperatingin restricted

gregatearelimitedas toqualityoramountandthe

minousmaterialisprobablydeterminedbythesource,

celeftinselectingthetypeofmix,butrather

kingthe bestpossibleuseofwhateverisavailable.

nwhichfollowswillbegeneralinformationonone

he mostcommonlyfoundaggregatesinpractically

thplants withwhateverclaysoilorbituminousmat-

iningthemechanicalsettingofthe gatesand

ture.

soincludedsothatthe operatorwinbe

mixturehe isobtainingissatisfactory.

ORBOTH

GGREGATEMIXES

RADATIONOFAGGREGATES

generalinformationaboutaggregateswhich

tuminousPlantandtheSoilAggregatePlant.A

greatpartuponthe properselectionandcombining

nthe correctproportions.Acrosssectionofanideal

xtureof varioussizedparticleswiththespacesor

kinglargerparticlesfilledwiththenext smaller

lledwiththe nextsmallersizes,andsoon

mall voidsarefilledwithdust.This means

tywhichwillstronglyresistdisplacement.

ferredto asawell-gradedaggregate.A

ayhaveamaximumparticlesizeof1-1/2inches,

whichisknownascoarsesand.Thestability

snot dependentuponthesizeofthe largest

eprogressivegradingof thelargeparticledown

minanceofsinglesizeparticles(whetherthey

rticles)the aggregatewilllackstability

particleswillrolland sliponeachother,not

aterialtolocktheminplace.Theonly ex-

eofcrushedrockwherethere areenoughflat

mechanicalinterlocking.

atthemaximumsizeofmaterialselected

Thethicknessofthepavementormat tobe

itation.Agoodgeneralruleto followisto

ixgreaterthanone-halfthethicknessofthe

herwords,if thepavementisatwoinchcourse,

eshouldnotexceedoneinch indiameter,pre-

e-fourthsinchindiameter;likewiseif itisa

mumsizeshouldnotexceedtwoinchesin dia-

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bletoproduceadurable pavement,forifone

completethicknessofthemat,it wouldbe

erestofthe mixanditwouldsoon loosen

he pavementbreakingupatthatpoint.

AGGREGATES

mportanceofgradationit wouldseemthat

tablemixwouldbetohave anelaboratescreening

engineersandoperatorsof thesemixingplants

uipmenttoobtainthisexactgradationand further-

necessaryaggregatestouseforsuchagradation.

rytoestablishprocedureswhichwill

quirementsofastablemix.In general,itis

aggregatepassa#4screenand50^retained

eenwillpassparticlesabout3/16"or less

productis commericallyknownassand).This

sible,useacombinationofcoarseandfine

uantityofcoarserparticlesinthemixhelps

ughthegrading maynotbeideal.In other

ureissaferfor desiredstability.Thereshould

argersize particlesabovesandtoactually

hotherorelsethoseparticlesare merely

thestabilityis againentirelydependentupon

self.

vailablebankrun gravel,containinga

,whichis idealafterremovinglargeoversized

idedbyhow wellthebankstandsupwhen

eotherhand,manybankrungravelsare pre-

ngequipmentisavailable,thelargerpieces

ecrusheddowntobalanceoutthe percentageand

edbycrushingwillalso helptoincreasesta-

ereit isdifficulttoprocessthebankrun

avelis available,agoodmixturecanbe

ushedstonewithsand.

d(passinga#4 screen)arethemosttricky

lttoestablishandinsuregoodstability.

dsupontheproper gradingwithinandthe

cles.Thisproperconditionis difficultto

ygradedsandmattends toshoveandrutunder

ndertheroller.

yavailableaggregateinmanysections

nothingbetterthanagoodsand mixwhenpro-

ndis usuallyabanksanddugout inits

whichdoesnot containmuchclay,butstandsup

kindicatesthatithas goodstability.A

resand,ontheotherhand, isusuallylackingin

hharmsitsstability.In conmercialpaving

ndsareblendedtogethertoobtaina goodoverall

eas alastresort.Moistenyoursand sampleand

Thiswillhelp asaguide.

snecessarytouseaggregatethatvariesin

produceadensemixturesothatthe mixwillhold

orthisreason sandsarenotsuitableforSoil

nddoesnothavesufficientvariationinsizes to

y.

NY,Aurora.Illinois

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portioningAggregates

ateshavebeenlocatedit isfirstnecessary

mategrading.Thisinvolvesonlytheseparationof

ofthesameaggregate,intotwogroupswith a#4

ionis orneara50-50split, thenthesingle

orall practicalpurposeswillproduceastable

uchthatthereis apreponderanceofeither

en,thenitis desirabletolookforan additional

etogivean approximate50-50split.Thatis,

and,then #2aggregateshouldbeselectedsuch

#4thanunder#4(or allover#4)inorder to

a50-50split. Ifnoothermaterialsare avail-

gregatewill havetobeusedas is,after

esdiscussedearliersuchascrushing etc.

used,thenthefollowingformulacanbe

rtionsof eachaggregate.Sincetheseproport-

number,onlyaselectedfewhavebeenusedin

.Afterdeterminingthecalculatedproportions,

usedinthemixingtables.See mixingtables

erBituminousMixesandtablenumber14under

portionsoftwoaggregatesto giveanapp-

ndunder#4:

Aggregate

regate

gateUnder#4

gateOver#4

gateUnder#4

gateOver#4

theformulais used:

a- 15%Under#4

Under#4

0)=61.5$of#1Aggregate

gate

-40divisionoftwoaggregates.

NY,Aurora,Illinois

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ax= 20$Under#4

nder#4

0)_ j>0$_ of#1Aggregate

ate

0-50divisionoftwoaggregates.

a-,= 20$Under#4

nder #4

0division oftwoaggregates.

D

RIALS

thbituminousmaterials(asphalts,tars)topro-

aterialwhichwhenproperlyplaced,producesan

erproof,trafficsurface.

elysimpleand easytomixandhandle,and

rafficsoonafterit isplaced,itmakesa good

ringpotholes,washouts,shellholes,etc.

flexibilityandstickinessofbituminousmixes

thepatchto secureatightjoint withtheold

mentisdry.

orepairwitha mixturewhichcompares

dpavement.Trytouse aggregatewhichapprox-

lay aboutthesamethicknessofmat.Ordinarily

edonly totaketheabrasionoftraffic and

ce.Theloadistransferredthru the^bituminous

dthelife oradequacyofthetoppavement

ofthe base.

SANDTARS

oftwogeneralclassifications,asphalts

dividedintodifferenttypeswhichpossess

quiredifferenthandling.Therefore,this

enoughinformationaboutthe variousasphalts

beusedin theMixer.

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haltcementto whichnaphthahasbeenadded.

ack",hencethecommonnameof"RC cutback".

aisaddedto maketheasphaltfluid,thedegree

nhowmuchnapthaisadded.Thenwhenmixed with

andallowedtoaerate,the naphthaevaporates,

.Theamountofheatrequired tomakeanRC

dsuponthe quantityofnaphthapresent.

edprincipallyonthe basisofthenaphtha

fromRC-OtoRC-5;thelowerthenumber,the

nt.SeeTablebelow.

"rapidcuring"whichreferstotheshort

thatoevaporate,ie.fortheasphaltto "cure".

penduponhow muchnaphthaispresent,so

hemostnaphthawillrequirealonger periodof

nsor setsup,thandothe RC'scontainingonly

.It isimportanttoallownaphthato evaporate

hardshellsurfacewithsoft interiormay

sitis importanttorememberthatthenaphthais

mabletherefore,cautionshouldbetakentokeep

ot toheattheaggregateexcessively.Always

eraturesdownto200orunder.See Bituminous

er.

RC's,givingthe naphthacontentand


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phaltscontaininglightoilswhichareadded

emfluidorsemi-solid.Theasphaltis veryslow

sthe name"slowcuring"or"SC".Heatis

denoughfor mixingasgivenonthechart below.

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24/476

sofsmallparticlesofasphaltsuspendedin

henmixedandplacedtheemulsion"breaks"andthe

theasphaltbehind.Emulsionsaredesignedto

alonbeing exposedtotheatmosphere,although

e consideredwhichmaycauseprematurebreaking.

ntheemulsion;alsotheemulsionshouldbe handled

"break"prematurely.Sometimesthestrainer

maycauseit to"break",inwhichcasetheyshould

emsulions,itisnot necessaryordesirabletodry

ateshouldberunthroughthe Dryerwiththeburner

an4$moisturepresentin theaggregate,it

tthenmustbeallowedto cooltoatmospherictem-

canbeadded.

esoftar fromcokeovenandfromtheman-

s.Thesemixturesproducedifferentblends

pallyinregardtoViscosity.Heatis required

formixingas giveninthetablebelow.

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mixdependsuponthepropermeasurementofthe

definitequantitiesandthe propermixingofthe

centagesshouldvaryfor differentasphaltsand

curatecommercialpractice,thesepercentages

xtensivelaboratorytestsandbyformulasbasedupon

entageofasphaltwouldalsobevariedaccording

uiredofthefinalpavement.

this plantwillbeused wherethereisno

erience,andnotimetomakeelaboratecalculat-

onditionshavebeenassumedandthefeedergate

schartedaccordinglyfordifferentaggregatesand

tingscanbepickedoffof thesechartsfor

ndividualoperator'sexperiencegrows,he

hartsettingsto bettermeetthespecificcon-

mpcapacities,weightsofasphaltsandasphalt

ctorsarelistedafterthemixingincasethe

tuallyfigurehispercentagesfromscratch.


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furtherexplainthis:

heRCTable showsanaphthacontentof22$.

enhaveto pump,

tappliedtemperature)

shtherequiredamountofactualgallons

aried byaseriesof changesprockets

allon figuremustbereadjustedtosuit the

Usingthesameexample:

perminx (100-22)-

asphalt cementavailableinthetotal

e meteringpump.

nsonlyapplytoRC's& MC'sasphalts.

mulsionsbecauseherethe equivalent"cutback"

T'sareallfiguredas straightbitumens.

dmixrequires5%bitumen.Thisis necessary

easedsurfaceareatobecoatedresulting from

yonthelean side.Ifamix istoorichit

bility,andthereis littlethatcanbedone to

ing.Wittyanopen aggregate(notfilled)this

sideandwithsuchan aggregateitwouldbewise

ngssomewhat.

mixhasgoodstability.Ifi tturnsoutto be

endencytoravelthesurface,aspray ofasphalt

pliedto thesurfacetoresistthe abrasion.Nor-

essaryunlessthesurfaceisusedayear ormore.

weightoftheaggregatehasbeen assumedat

Thisisa goodaverageweightalthoughsomevar-

ththeaveragemixfiguredon theleansideand

suredbyvolume,thisvariationshouldnotbe serious.

peningshavebeencalibratedandthetable set

aggregateunderaverageconditions.Themeasurement

e openingmightvarywithdifferentpercentages

orbecomesmoreexperiencedhecanadjustthegates

eofthemixunder certainconditions.Wherelarge

itissimple tocheckgateopeningsbythefollow-

gs

atesat2" openingandstartuptheplant

gpumponthe mixerortheburneron thedryer.Allow

uslyrunanddischargefromthepugmill untilthe

gmill.Thisisusuallyaboutone ortwominutes

thepugmill.Thedischargedmaterialshouldbe

ndthen redumpedinthestockpileattheload-

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is uniform,stoptheoperations,placean

ge,andthensimultaneouslyresumeoperations,

o loadthetruck(orpartiallyload,have at

thetimeon stoppingtheplantoperationsand

f gravel.Theweightoftheaggregatewillbe

weightoftheemptytruck.NoteBesure that

operatingspeedsduringthesetestruns.

- Ibs.per.min.ateachof twogates

"gateopening

"ofgate openings.Caution:Besure

longenoughfortheaggregatefromthe 6"gates

eforecatchingasample.Otherwise,the2"gate

issecondreading.

theIbs.permin. atanyothergateopening

byinterpolatingorby graphingonpapera

points.

anddump theaggregatebackonthestock

tissetup fortwomixingcapacities-25tons

our.Theselectiondpeendsmainlyupontwo

eaggregateand(2)howhot shouldtheagg-

htheparticularasphalt.Experiencewillhelp

conditionsandselectthepropercapacity.Gen-

to startwiththelowercapacityandthen

ppearspractical.

ouse thetablesitis necessarytoknowwhat

edand'theapproximateclassificationofthe

callyasto typeofaggregateandhorizon-

Notethatanall-sandmix willrequirean

.Undertheaggregatecolumnsarefoundthe gate

amountof materialwhichwillbefedbythis

inute.Onthe samelinewiththeasphaltis

tureformixing,thegallonsofasphaltto

mix,and thesprocketstobeusedon theKinney

ectamountofasphalt.

supposeMC-4is tobemixedwitha combination

0-60"rangeand itisdecidedto usethe20T.P.H.

lockingatthechart-weseethat the47Tdrive

pumpsprocketshouldbeused.Followingacross

undertheproperaggregatecolumnthe#1 gate

deliver2.61cubicfeet perminuteandthe#2

0"todeliver 3.91cubicfeetperminute.Next

edtemperaturereadingof190F.

nformationnecessarytosetthe machines,

gsandthe pumpsprocketsandtemperatureofbit-

insanexperiencedoperatorcanjudgewhether

ssary.

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lus# aggregate


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MEN

heatedandtherefore,agivenvolumewill

twillat 60F.Forthisreason,it will

theweightofthebitumenused atitsspecified

erethespecificgravityorweightpergallon

own,theexactweightpergallonat the

becalculatedasoutlinedbelow.

WeightorVolumeof

peratures

.


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35/476

onfromSpecificGravity

menpergallonat60 F.whenthespe-

sknown,multiplythespecificgravityby

erat 60F.(Actualweightofwaterat

pecificgravityis1.0)

phalt cementis1.011.

l.at60F:

.pergal.at 60 F.

eightpergallonfrom specificgravity:


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36/476

yasto contentandproperties,itis

ooksonthissubjectfora moredetailedtechnical

hepurposeofthisbook,claysoilsbehave

veandwillbeclassifiedundertwo generalclass-

SandandSilt

lysandandsilt havingalowclaycontent,

aggregateconstructionbecauseofthelowbind-

ysmallpercentageofclay(whichproducesthe

oilmakesit necessarytoaddquiteasizable

takingasamplein thehandonecantell from

feel"whetherit containsmuchsand.Sandy

monnearcoastalor lakeregions.Todetermine

mplemightbe moistenedandrolledintoa

nd andgraveltoseewhetherit containsenough

llyifa smallmoistenedsampleofthesoil

sit willbesatisfactoryifit winforma

untilitis aboutthediameterofacommon

Clay

centageofclayarewell suitedforsoil

However,someoftheseclayeysoilshavedifferent

eofthemundesirable.Anordinaryyellowclay

eclaycontentandwhichdries outinlumps

wderwhichreadilyabsorbswater,is wellsuit-

mboclayswhichretainmuchmoistureandbecome

henwetwillbe hardtohandleandmix,since

rusheasilyintofineparticleswhichcan

ghoutthemix.Insteadtheywill "pancake"as

herrolls intosoftlumpswhichwillnot break

ndful,onecandetermineapproximatelyhow

orkingitwiththefingers,possiblyaddingsand

oldthemtogethersuccessfully.Remember

entinthe mixwillvaryaccordingtotheclay

emixdependsuponthepropermeasurementof

efinitegradedquantitiesand thepropermixing

erin thepugmill.Thepercentageofsizesof

erwillvaryfordifferentsoilsand fordifferent

mercialpracticetheaggregateswouldbemeasured

ctamountsofdifferentsizeswerepresentand

stoclaycontentandamountofwater required.

operatedwheresuchtests cannotbemade,

onshavebeenassumedandatablemadeupfor the

eningsandsoilgateopeningfor differenttypes

generalclassificationsofsoilsalreadydis-

ratorcan setthegatesforthe initialset

bular jfaluestomeetspecificconditionsas

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ouse thetableitis necessaryto

availableandtheapproximateclassification

dydiscussed.

mbinations(togivethe50-50split onthe

s listedundertheBituminoustablesexcept

sand"and"allcrushedaggregates"which

gregatemixes.Thesoilcolumnattheleft,

sof soils.

nsappearthegatesettings ininches

et perminuteforboththe30 tonsandthe

es.

supposethesoil availableseemstocontain

andsupposea 40-60combinationofaggregates

itytobeabout30tonsper hour.We

ercolumnforthe 40-60combination

soil selectionunderthe30tonsper hour.

dsthatthe#1 aggregategateshouldbeset

egateset at5.66"andthesoil gateshouldbeset

arytosettingupis nowavailableandafter

nce,hecanjudgewhetherfurtheradjustmentis

pecificconditions.

rted,the operatorshould

etherit issatisfactory.Naturallyhewillbein a

ftersomeexperienceinobservingtheresultson

owingpointswillhelpguide him.

eofgettingtheproper amountofmoisture

ssedpreviouslyunder"SettingUpTheMix".The

mix,testingasamplein hishandoccasionallyas

millto determineifheisadding thecorrect

lholein theground,ashovelfulcanbetamped

pactswellandholdstogether.Ofcourseit

atortojudgeamixin thefutureafterhehas

ctsafteri thaslaidfor afe.jdays.Remember

moisturecontentneartheoptimumandavoid

rtantthatthe materialsbethoroughly

uniformlythruout.Somethingsto watchoutfor:

notbeingcrushedintofineparticlesit

oughtheaggregate.If lumpsarepassingthrough,

adjustedtoeliminatethem.Somegumboclays

willpancaketogetherafterpassingthroughthe

mixingandcannotbe eliminated,trytofind

arenot suitedtothesoil aggregatemix

chsandorsilt andnotenoughclay.Ifafter

whichhasasatisfactorymoisturecontentbut

rdue toinsufficientbinder,increasethe

s deesnothelp,tryto findanothersoil

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hasbeendiscussedbeforethatif theagg-

ofonesizeof aggregateorifitcontainsall small

noughtoholdtogetherwhen dry.Therefore,

tosee thatthepropergradationofaggregateis

pactwithoutvoids.

ustbeproperlyplacedinorder toinsureits

.Eventhoughthemixisproperlyproportionedthru-

oughlycompactedtoinsurestability etc.The

nistoeliminatevoids betweenparticlessothat

andbindtightly underloads.Inorder

xshouldbetampedor rolledinlifts.This

acedandtampedinlayersoftwo orthreeinches

ontrolsthisamountofcompaction,and

mill ischeckedtoinsuretheproperamountof

rtantthatthemix belayedandcompactedvery

dlossofwaterbyevaporation.

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ationofPlantSites.41

p41

e41

tonLocation41

6

ePlant.47

ns47

etUp49

e49

tonLocation50

onUnit50

6

ePlant56

ns57

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LLOCATIONOFPLANTSITES

uminousPlantSetupSite andtheSoil-

pSitedependsonthe pavingprojectandits

erialsrequiredas wellasothersuppliesinvolv-

menfortheBituminousMixeswillbeavail-

productnottobe foundlocallyandthus

etheselectionofthesite.

bletosetup neartheproject,however,

neededmaynotmakethispossible.The

bile,andsimpleandquicktoerect,it iseasy

aggregatesourceofsupplyortothe siteof

whetheritis easiertohaulmixedmaterialor

ofcourse,usableaggregatesmaybefoundright

yacentralizedsetupnearanaggregate

there areseveralprojectsinthesamevic-

Aggregateconstruction,waterisrequiredso

dbeconsideredinthe plantsiteselection.

ntsis outlinedwithdimensionedlay-

.A measuringtapeofapproximately50feet

oexpeditethelocatingofthe units.

UP

e

sistsofthe831Dryer andthe841Mixer,

chargetheaggregatehopperontheDryer,

erto facilitatethesetupofthese

pointsandcorrectoperationofunits,it

elornearlylevel,welldrainedground loc-

ortheunits only,shouldmeasureabout

hadditionalareawillberequiredto acc-

ckpilesandtruckdriveways.SeeFig.9.

salreadyin place,itwilldetermine

relationtothepilefor feedingaggregates

nalternatelayoutwiththe Mixerohthe

s possibleiftherearespacelimitations,

e mostpracticalandefficient.

tUnits

1Dryeraresupportedintheir respective

xlesand thebuilt-inadjustablejacklegs

iedbythe tractor-truckortowingdolly.See

position,theparkingbrakesshouldbe

nground,itmay benecessarytoblock

stablejackstakingcareofthe otherend

lly.Ahydraulichandjackisfurnishedto

ortworeasons;one,becauseitwouldbe

oplaceafterthe Dryerwassetjandtwo,

oconnecttothe bitumensupplyandfillthe

eatingisnecessary;therefore,theother

ilethis isbeingdone.

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owingmixer,left,dryerandbucketelevator.

sideshowingrelativepositionof mixerconveyor

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place,thecenterline ofthemixer

cedlessthan32'-7"from theedgeofthestock

eapproximatepositionoftheplant

hemixertowedintoplace.Set thejacklegs,

emovethetrailerunit andlevelupthe

enrequiredtowork onthemixertoattend

he telescopingconveyorreadyforlowering,

stothemixertank,and fillingthetank,

y.

ecessarytostakeout ontheground

tnemixer.Thisisdone byplacing

Placethefirststakeatthe edgeofthe

hecenterofthe wheelat"A".Sight

mixerconveyorbeltandplacethesecond

29'-6"from"A".From"B"measure14'-7"

veyorandplacestake"C".Thisstakemarks

erwheel.Thenplacestake"D"asshown.

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cedinits approximateworkingposition

placeafterthedryerisset-up.

to positionandmaneuvereduntilthe

take"C",andinlinewith thecenter

of thejacklegfallsonstake"D".

positionso thedischargechutefrom

operlyontothe mixerconveyor.Before

cetocheckthisposition bysighting

belt.Afterthecorrectpositionhasbeen

kingbrakesandlowerthe jacklegs.

ollyhas beenremoved,itis

mainframeofthedryerwitha leveland

positionwiththeadjustablejacklegs.

henthedryer isapproximatelylevel(main

assumeits properslopeofabout6 degrees.

veled,thebucketelevatorcanbe

heelevatoruntilit isdirectlyinpos-

erandthenset itonthejacklegs.SeeFig.

towingtonguethenunwindthehoistcable,

aveat thetongueendandthenup over

hopperandanchorinthehole provided.Take

raisetheelevatorslightlyofftheground

ythenberaisedupand boltedoutofthe

atorupmakingsurethat itisgoing up

pointwillbe reachedwherethewheels

tthe timethattheelevatorframecontacts

hispoint,disconnectthelowerpush-arms

em outintoplacetoshowhowmuchmore

raised.

dattachthesepush-arms.Unboltthe

hopperframesupportsandswingthem outinto

mtotheelevatorframe.

eupfromthehopper intoplaceunderneath

hainon whichdrivestheelevatorcounter-

kshaftonthedryer unit.Thenunwindthe

he dragscoopshaftsonthedryer,pass them

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nderneaththediyerandthen outthroughthe

hesheavesothatthexecanthen beconnected

shouldhavebeenleveled,thestack

ed ifnecessary.

OR

raised, themixerconveyorcanbe

astenthehingedportionofthe telescoping

removingthekeeper-pinfromthesupport

ethis sectionandinsertthesamepin

ghtentheconveyorout.Thenremovethe

heconveyorandallowthe conveyorto

dby eheckingitwiththehoist,if

ouldcometorest9"belowgroundline with

dischargechute,but becauseofvariations

andflexibilityofthe conveyor,itmaynotbe

conveyorclearsthesideofthedryer

,theapproximatedimensionsaregivenon

positionoftheconveyorisreached,

heheadshaftsprocket.Thenloweritthe

lock-bartoholdtheconveyorsolidly

n.


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NGTHEPLANT

anditis desiredtomovetheplant,the

anoutthehopper,pugmill,piping,andto

erasphaltstoragetankshouldbe flushedand

ons.

nveyor,removethelock-bars,slipoff

y meansofthehandhoistprovided,pull the

theconveyorridingonrollers.Severalmen

gtheweightof thelowerendduringthis

k-bartoholdtheconveyorsecureandthen

oint,fasteningthe hingedportiondownto

llwith thekeeperbarprovided.

tor,firstunfastenthedragscoopsfrom

cablesup outofthewayanchoringthemto

argechuteontop ofthehopperdownoutof

h-armanddisconnectthedrivechainand-re-

cabletothe anchorontopofthe hopper

on.

ttingthedryer readyfortravelsuch

eningthepush-armsbackoutof theway.

ereadyfortravel andshouldbecheckedto

enedsecurely.

UCTIONS

dbutbeforebendingupperright section.Jacks

wheelontractor,left,hasjustmadecontact.

erjackupthefrontend (usingthe

ntilthetractor-truckoradollycan be

eelconnectingpin.Themechanicalbrake

earwheelswhileengagingthe fifth-wheel

neoutof position.

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s initsposition,jackson machine

necttheserviceairbrakelineand em-

eir properconnectionatthefrontofthe

gused,theairbrakeconnectionforthe

eneckframemustbeconnectedtothedolly

position.

urn theaircockvalvehandleimmediately

tiononthe machinesothatthehandleis

This settingwillpermitairto travel

en theaircockvalvehandleisturned

e lineisclosedtoair travelingthrough

ionwhenonly atractor-truckisused.

remade,releasethemechanicalbrake.

eto trytheairbrakebefore starting

absolutelysuretheyarefunctioningpro-

erintowingposition.

nairissuppliedby thetractorunit,

esideof themachine.Thecockonthe

be openedforaninstantto testforair

Aslongas theairlinesare connected,the

tion,butwhenairlinesare broken,

connecting,anautomaticvalvewillre-

akesto set.Toreleasethebrakes,the

kmustthenbe opened.

radjustingbrakewithslackadjuster)

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rbeingtowedbehindModel831Dryer.

enmadereadyfor towingbyextending

urelyfasteningthehoistingcable,it

unit orattachedtothepintleconnection

DryerUnits. Whenproperlyconnected,

andfastened.

rairpressure (55#)beforetowing

rsettinginoperationfor aperiodof

air tobringitup toproperinflation

toeachmachine,theyshouldnot be

ur. Careshouldbetakeninwatchingfor

ns,etc.

SETUP

NTSITE

onsistsofthe821Soil-Preparation

ng the331Elevatortochargethe

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oil-PreparationUnit.Inorderto facilitate

ecauseoftransferpointsandcorrect

desirabletoselecta levelornearly

location(similiartoBituminousPlant).

units needonlytomeasureabout50feet

nalareawill berequiredtoaccommodate

truckdrivewaysaswell asaclaysoil

showingHixeratrightandSoils Unitat

bytheBucketElevator.Thisis theop-

nin Figure18.

PLANTUNITS

SoilPreparationunitaresupportedin

ontheirtrailingaxles andthebuiltin

supporttheendcarriedby thetractor-

ig.? Tokeeptheunitsin position,

beset securely.Duetounevenground,it

kunderonewheel,theadjustablejackstaking

lengthwiseandlaterally.Ahydraulichand

ntheseoperations.

theplantis toplacethe841

the aggregatestockpileisnot

ocationisadequate;butifthestock-

snecessarytospotthemixer sothat

heelevator.SeeFig.21.Fromthis

st thingtodois tospotastake "A"

houldbe. Thetruckdrivercanthentow

cklegs canbelowered,thetowing

theparkingbrake.Thenecessary

Severalmenare thenrequiredtowork

uchdetailsasmakingthe telescoping

ng,connectingthewatersupplylines

RATIONUNIT

nUnit,itisfirst necessaryto

positionwithrelationtothemixer,

kesas showninFig.21.

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nnedout fromtheBucketElevatortopull

tElevator.Thesoilshopperon the821Soils

e operator'sladder.

of themixerconveyorbeltand

and27'-l"from"A".From"B"

esto theconveyorandplacestake

uteredgeof therearwheelonthe

placestake"D"asshown.

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cedinits approximateworking

ficulttoplaceaftertheSoil Unit

edintopositionandmaneuvered

instthestake"C"andin linewith

the centerofthejacklegfalls

theSoil Unitinapositionso the

ocatingfeeder,andcrusherrollsfallpro-

eyor.Beforeunhooking,itisgoodpractice

htingdownthe mixerconveyorbelt.

oilsUnitby sightingdowntheMixerconveyor.

asbeenreached,setthe parking

gs.

e831Elevator.Toplaceit inapp-

aroundthe821machineandmoveit until

eaggregatehopperand sothatthecenter

ththehoistbracketon thetopofthe

klegsatthe frontofthemachineto

beingunwoundfromthedrum,pass

gue endafterthetonguehasbeen slid

en hookintheanchorbracketsonthe

.

d liftthejacklegsslightlyoffthe

unboltedandshovedupintothesupport

m inpositionoutofthe wayforraising.


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ONVEYOR

r aisedandtheremainingdetailsof

beingtaken careof,theMixershouldbe

eforetheconveyorcanbelowered,itis

pit underthe821rolls andtheplate

heconveyorcanbeloweredintothe

erthe chainguard.Thispitshouldbe dug

onsshownonFig.25.Afterthe pithas

orreadyforloweringby straighteningout

elescopingsection.Thenremovethe

ertheConveyorlettingitdowngradually,

eckit.Justbeforeitreachestheoper-

drivechainandchecktoseethatthe

correctpositionbysightingdownthe

ayandreplacethelock barwhich

ess.

yoritmaynotwantto clearunderthe

ethehydraulicjacktojackup the

ejacklegsenoughsowhenthe hydraulic

theMixerwillbeloweredso that

pdownslightlyenoughto clearunder

2.Then aftertheConveyorhas

Unit,the jackcanagainbeusedto

slightlyandthento leveltheMixer

PreparationUnitandthe831

unwindthe drag,scoopcablesfrom

hrouththetwo Dryersheavesout

heavesandthento connectthemto

es.Thedischargeplatesonthe821

nbeswungupinto positionandbolted

mthebuckets.Thegrizzly bar

overthetop ofthehopperifthey

d,theelevatorraised,dragscoops

snowreadyforoperationasdiscussed

MachineOperations."

NGTHEPLANT

mptythehoppersand cleanout

eftinthepugmill,hardenedor

ocleanoutlateron.Raisethe

nectthesupplypipingwhile theelevator

outthe lockbarandcrankthe

htheaidof severalmenliftingatthe

placethelockbar,thentake outthe

nveyorwillbreakandthencanbefasten-

er thepugmillusingthesamekeeperpin.

tor,itisnecessarytodisconnect

ethe cables'fromthesheavessothat

lockedonthedrum.

downintothehopper forclearance

sif desired.Removethedrivechainfromthe

tor.Thenfastenthepush armsandfoldthem

elevatorisfree.

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necessarytopullthebottomendout

ound,thenitmilleasilylower itself

ngbykeepingthehoistcabletight. To

canbeattachedtoa truckorawinch.When

stenthehoist cableandsetthejacklega

y.Theothermachinesshouldbereadyfor

UCTIONS

tand Mixer,jackupthefrontend

rnished)untilthetractor-truckor

thefifth-wheelconnectingpin.The

besettoholdthe rearwheelswhileengag-

pushingthe machineoutofposition.

towingposition.Fortowing841mix

s initsposition,jackson machine

necttheserviceairbrakelineand

otheirproper connectionatthefrontof

beingused,theairbrakeconnectionfor

ooseneckframemustbe connectedtothe

eendone,turn theaircockvalve

dtheairhoseconnectiononthemachineso

withthehoseline.This settingwill

dollybrakeunits.Whentheair cock

swisetothe airline,theline isclosed

itisturnedin thispositionwhen

.

remade,releasethemechanicalbrake.

eto trytheairbrakebefore starting

absolutelysuretheyarefunctioning

nairissuppliedby thetractorunit,

esideof themachine.Thecockon

uld beopenedforaninstantto test

losed.Aslongastheair linesare

nkwill notfunctionbutwhenair

dentallyorin disconnecting,anauto-

eaircausingthe brakestoset.To

ckinthe bottomofthetankmustthen

radjustingbrakewithslackadjuster)

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enmadereadyfor towingbyextend-

securelyfasteningthehoisting cable,

ckunitorattachedtothe pintle

e SoilPreparationUnitorMixer.

,thejacklegscanberaisedandfasten-

rairpressure (55#)beforetowing

rsettinginoperationfor a

l requireairtobring itupto

toeachmachine,theyshouldnot

hour.Careshouldbetakeninwatch-

arpturns,etc.

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.61

es.......64

ms........67

.....74

..76

76

....79

..79

.81

erandGates..84

Rollers....86

oneandBurner...89

.....98

.......94

95

....98

..98

tor

.......101

3

3

.105

erandGates..107

.....108

or......109

110

..112

112

....114

..114

......

......117

.....124

......129

ubrication..132

...138

.......139

40

141

142

3

hain.....143

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elescopingconveyorisstillin towingposi-

nfoldeddownforlowerclearance.

841 PugmillMixershowingbitumentank,etc.

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.30)isa rubberbeltconveyorwhichcarries

omeitherthe831Dryer orthe821Soil Preparation

8A1Mixer.

nd isontheground.However,inorder that

d,theconveyorisconstructedintwo sections.

theotherisa movableortelescopingsection

he fixedsection.Thistelescopingsectionis

nd-operatedcablehoistwhichconnectstothe low-

quiredto assistthemanwhois crankingtoraise

e bottomendandstartingtheconveyorsliding

.

astwopositions.Oneisthe operatingor

eris thetrailingorup position.Botharefix-

earthefootshaftofthe fixedsection.This

es inthelowersupportroller bracketandthe

ection.

etelescopingsection,itis necessaryto

ff.Thischaindrivesboth beltsatthesame

thefootshaftof thefixedsectionandonthe

ngsection.Itis notnecessaryto"break"this

esupenoughslackso thatwhenevertheteles-

wfeet fromoperatingpositiontheidlermay

ppedonoroffthe sprockets.

asasmallhopperfastenedto thefootend

easit isdischargedfromeithertheDryeror

overthishopperkeepoutoversizestones,

erial.

quitelongand whenitisraised,this

perportioncanswingdownand befastenedtoa

obreakthe conveyor,aKEEPERPINistaken

overthespraychamber,andthis samepinis

ownto asupportattheend ofthepugmill.

nsferconveyoralsohas asmallhopper

,however,itreceivesthematerialas it

scopingsection.Thissecondbeltcarriesthe

ntothe pugmill.

ctionsis18"wide,designedtohandle the

1Dryer.The rubberbeltcanwithstandtemper-

utsufferingseriousdamageaslongas thebelt

ng,thebelt hasachancetocoolon itsre-

hot material.Ifforanyreasonit becomes

lwaysbe suretogetall hotmaterialoffbe-

ebeltis leftstandingcoveredwithhotmat-

tperiodwouldpenetrateintothebelt to

ofbandbetweenthe rubbercoverandthecan-

trytokeepthetemperatureofthe aggregate

mixing.

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oughingrollercarriersspacedeveryfew

erson theunderneathside.Bothsectionsof

getherasdescribed.Thedrivepulleysare

rewsso thattheymaybeadjustedto getthe

tinthebelt. Also,thetroughingcarriersare

areslottedsothey maybeshiftedslightlyto

tssothey willruntrueon thetroughing

d footpulleys,thefollowingadjustmentscan

ontheheadand footpulleybutrunsoff

onelooksupthe conveyor,thentheright

bemovedslightlyforwardinthedirectionof

salignment.Ifthe belttravelstothel eft

rriersmustbemovedahead.Thecarrier

permit suchadjustment.Shouldthecarrier

theholddovmboltandthe beltstillrunsto

ntheopposite'side ofthecarrierscanbe mo-

vel ofthebeltto correctthemisalignment.

ulleysshouldbe squareorat90 tothe

fthebeltcontinuesto runofftheheadpulley

mustbeturned tocenterthebelton thepulley.

e belttotheleft ortowardsthecenterof

pingconveyor)hasthescrewadjustmentat

werconveyor(fixedconveyor)hasthetake-up

hebeltrunsoff thefixedpulleyoneither

movementcanbechangedbyadjustmentofthe

describedabove.Thesetwopulleysareset

nnotbe moved.

eentakenandthe beltbecomesloose,it

asectionofbeltand putinnewlacing.

are,otherwiseitwillnotr untrueonthe

leys.

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ugmillLinerPlate

sthebasicprocessin bothplants,ispro-

hconsistsofa curvedsteelshellinwhichtwin

ositedirectiontoeach otherorfromoutsideto

in TypicalPaddleSettingdrawing,Fig.33.The

mixedmaterialsarefedintothepugmill,mixed

paddles,anddischargedasa uniform,finished

sfittedwith eightarms(Fig.31)on which

uchananglethat,asthe paddlesrevolve,each

themixtowardthedischargeendof the

resultsfromthis interlockingmovementofthe

time eachparticleremainsinthepugmill,de-

xing.

rtomixthan others;therefore,itisnec-

hedegreeofmixingsoit willbesatisfactory

sisdonebychangingthe settingofthe

tenthemixing cycleorbydammingtheflowof

hargedamcontrol.

ant willinvolvemixingmaterialswhich

x.Therefore,thepaddlescanbesetto give

ingcycle.Aggregateswhichcontainalarge

derto mixsatisfactorily,requiringadif-

ructedlikeaneight-pointsocketwrenchso

onthe squareshaftateither45degrees or90

.See(Fig. 31)aboveand(Fig.33).

sa spiralwhichkeepsthematerialinthe

oftime.Therefore,unlessthematerialis

usuallynecessarytoincreasethelengthof

ngsomeofthe paddlesto90degrees.When

paddles,changetheones attheDISCHARGEend

thechargingendasadditionalslowingup is

etosetallthe paddlesat90degrees;the

ld beleftat45 degrees.Whenchanging

aroundshaftsholding themuptopreventun-

teeth,alsoitis advisabletokeeppaddle

ratepile toavoidconfusionandpossible

fnot noticedwouldmakeitnecessarytodo

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G

aft atthedischargeendshouldalwaysbe

Marked"Retard"inFig.33above).

erearsix paddlesoneachshaftat90

l notcoatingormixingproperlyorif

kenuprequiringadditionalmixingitis possible

epaddlesatthedischargeendto furtherleng-

sisdone bytransferringapaddlefromone

t facestowardsthematerialandwhen

ndstomovethe materialawayfromthedis-

hus retardingtheactionorflowthroughthe

erthatwheneverthepaddlesaresetto in-

epressureis correspondinglyincreased,which

llberequired forthisgreaterloadand that

lateswillwearoutfaster.If,after chang-

les,theloadbecomestoogreatforthe

yto cutdownthecapacity;inotherwords,

thepugmill.It isimportanttoremember

cityisproportionaltothedegreeof mixing

nalto thepoweravailable.

rgingendofthe pugmillareprotected

blesteellinerplates.Twocurvedliner

bottomand sidesfromabrasion.Theyare

geableaswellasreplaceabletoprovide

eendoftheplates willwearoutfirst;there-

eddaily,andunlessfairlywell worn,re-

getall thewearpossible.Flatlinerspro-

wear,butthey willoutlasttwoorthree

haltsinthepugmill,itis importantto

ever,sometimesthefumesfro:,:thecutback,r.ay

ssiblyfrom overheatedaggregate.Ifthat

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nthesprayvalveso thebitumenwillcir-

eadof spraying,leavingtheaggre'gatefeed-

otherthefire.

ed,itisimportanttocleanout thepug-

illnothardenandcausedamageto thedrivethe

arted.Also,changingofthepaddlesettingand

cultjobifmaterialis lefttoharden.

ettingofthepaddles,it isnecessaryto

nd stripthepaddleshaftsup tothepaddles

arings,dirt sealsandbushingsmustallbe re-

andspacerscanbepulled off.Whenchanging

ecessarytoworkonbothshaftsatonce,mak-

ectwhenreplacingsothatnotwo paddleswill

shouldbecheckeddailyforwear.Thetips

sobeturnedaround towearonbothedges.If

newonetokeepfromlosing thetip,whichmight

learmwhichiscostlyandrelativelydifficult

plates,scrapeall materialofftheplates

ved.Itisnecessarytotakeoffthe truckdis-

plates out.Whenreplacing,usenewboltsand

ntothecountersunk holes.

OL

dlever

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fttslocatedatthedischargeend tfthe

e DISCHARGEDAMCONTROLwhichisahopper-

istanceto theflowofmaterialin thepug-

votpointandis controlledIjacableand

chetandlockfor holdingthegateinany pos-

the dischargedamcontrolunittheflow

canbesloweduporallowedto flowfaster,

eof mixingcanbemaintained.Thisunitshould

ewhilestillobtainingagoodmix toavoid

cessaryloadonengine.

edslidingplatuv.hichcoversoruncovers

edamcontrol.It iscontrolledbjelong

pen whenmlxing>be!gshutonlyto stepthe

orchangingtrucksunderneath.Ifittakes

econdstochangetrucks,thegatemust be

avetobestopped,forthe hoppersectionof

cannotholdmuchmaterial.

relittlemaintenance,theonlyadjustments

onof thecutofflever.Thisisdoneby

adrantplate tosuittheconvenienceofthe

dbelockedtightlybeforetravelingto keep

d.

temincludestheKINNEYpumpandPIPING

addbitumentothematerialsin thepugmill.

et,thebitumenflows throughthe

tothestrainer;valves"3"and"C"being

hebitumenthen flowsthroughthepipeto

p.Fromthereitis pumpeduptothespraybar

s opentothespraybar,thebitumenpass-

ayedoutthroughthenozzleintothe pug-

lsobeturnedto sendthebitumenback

esiredto spray.Thisisnecessarywhen

pumpcanbeoperatingandthe bitumenquick-

rthesecondthattheaggregateisdischarged

ortantthatthisspraybarcontrolvalve

hutoffthe linecompletely,fortheKinney

placementtypeandcannotoperateifthe

nneyPumpKinneyMeteringPump


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eeFig.37)has acapacityoffrom2to

hecapacitydependsuponthespeedof rot-'

eedisconstant,the speedisvariedby

hichdrivethepump.Ninesizesof sprockets

shaftand twosizesofdriversprocketson

erefore,eighteendifferentspeedsor

apacitiesforthesesprocketsasusedwith

hownin"ConstructionInformation"ontable11.

erthatthe bitumenmustbefluidenoughto

uireheatingandTable12under "ConstructionIn-

cttemperatures.Thepipingandspraybarare

gwithsteamifasphaltis leftintheline dur-

ht.Thepumpisnot pipedforsteamandmay

hif difficultyisencounteredinstarting.

esshouldalwaysbedrainedsince steammightnot

nthebitumeniscold andstiff,damageto

earbolt(4)(Fig.38) throughthepumpsprocket

easure,sinceitwillbreakwhenloadis too

/16"x1-1/4"hexheadcapscrew.Whenever

ningoftroublesomewhere-the asphaltis

gnmaterialmaybeinthe pump;therefore,the

dbeforetryingtocintinueto operate.If

notsteadyanduniform,thestrainershould

ogged,orpossiblytheoutletmay beclogged

sanairleak inthelinewill alsocutdown

okeepthestrainercleanatall timesand

oreeveryrun.Thespraynozzle onthespraybar

erusing.

shaft,andsprocket

ingpump,besureto turnthevalvescor-

oughthe Kinneypump,sincewaterdoesnothave

litiesthatbitumendoes,andwill damagethe

pump.

theKinneypumpandinthe piping,the

artand allwaterdrainedoutthenreassembled

oilrun throughtogetthewaterout ofthe

stopreventcorrosion.

ngforsometime withoutoperation,fuel

ttoinsure gettingouttheasphaltorsoft-

bestartedwitheasewhen operationsarestart-

topofpumpcanberemovedto putinfuel

phalt inthepump.

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73/476

KETSONTHEKINilEYPUilP

ecapacityoftheKinney pumpisvaried

ocketorthe pumpsprocket.Therearetwo

othofwhichare ofthesplittypeso that

yonthe pugmillpinionshaftwithoutdis-

heshaft.Thepumpsprocket(5),(Fig.38)

pshaftandis securedtoahub(3) bya3/16"

w,(4)nut andlockwasherwhichactsasa

pumpfood overload.

ketitmayor maynotbenecessaryto

guponthedifferenceinsize ofthesprocKet

e onetobeused;and theamountofadjust-

neypumpidler sprocket.Ifthedifference

be necessarytobreakthechainandre-

inksif alargersprocketisto beused.

versprocket.

ket,loosenchainandunscrewthetwohex

mpshaft,slideoff theloosewasher(6)and

)whichwillthen allowthepumpsprocket(5)

cewithdesiredsprocketandreplacebolt,

gthechainwiththe idler.

ket,onthePugmillPinion Shaft,re-

ockwashersandtwolockplatesnearthe

andthe sixmachinebolts,nutsandlock

wohalvesofthesprocketsto thehub.Re-

lbolts andadjustchain.

ppedwitha packingjlandatthepoint

pumphousing.This glandconsistsofpack-

andcompressedbyaSpannernut.Thepur-

entanyleakageofbituirenout aroundthe

this Spannernuttootightly,orexcessive

ner,removetheplug fromthebottomof

outthescreen,andwashit ingasoline.

stonceortwiceaweekor wheneverchang-

the tank.Neveruseflametoclean

dandwillnotstandintense heat.

estheVIKINGPUMPandPIPING (Fig.35)

ptythestoragetankandto circulatethe

n thetank.Thesamesystemisused for

nk,theoutsidesupplylineis connect-

e,at"E"andthe twoway"F"(Fig.35)valveatthe

andvalve"C"atbottomisclosedas in

enisthen suckedinbytheVikingpumpand

veontop andintothetank.

etankof bitumen,valves"A"and'V

sclosedas in(Fig.39)andthe valve"F"

ankisclosed.The outletline"G"


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pply

e

pply

outsidetankwhichistobe filled.

kstheasphaltout ofthemixerstorage

ughtheline.

atethebitumenwhilehaating,valves

dvalve"B"is closedasin(Fig.39) andvalve

hetankis openedandthepluginsertedin

the asphaltbackinthetank.

tivetyperotarygearpump;therefore,it

argeshouldnot beclosedoffwhenpumpis

mustbefluid enoughtofloweasily,other-

maged.However,ashearboltinthepump

pfromtoogreata load.Thisisastandard

pscrew.

used tofilloremptythe storagetankandto

nitisheated inthetank.Thesamesystemis used

This isforsupplyonlyand isnotusedfor

othe mix.

edrainedafterusing. Afterpumpingasphalt,

opreventasphaltsettingupso thepump'willnot

r,drainandaddlubricatingoilto prevent

should breakwhilepumping,besureto

etheasphaltis toostifforwhetherit is

terialisinthe pumpbeforereplacingshearbolt

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erPump

ply.

terPump

geTank.

sprovidedso thatthemixermaybeapplied

ction,utilizingclayandwatertostabilizeagg-

tionswithwatersuppliedfromtheMixerStorage

ofsupply,with WtterPump,Strainer,Water

rsforcontroland supplyofwatertothePugmill.

altypeunitwitha pipelinewhichwill

storagetankthroughvalves"A"and "B",(Fig.35),

sourceofsupply at"D".

Supply-Besure thatVikingSupplyPumplines

eanedsothatasphalt willnotclogthewater

rydisassemblyandcleaningofthepump.Tofillthe

mpisused.To fillthetankclosevalve"Cn

"to positionsshownon(Fig.42).Openvalve

)and connecti;atersupplytoVikingLineat

isclosedandvalve "A"isinthepos-

o keepwateroutofthemeteringpump and

es enterthepumpandlines seediscussions

System"tosupplywaterfromtheMixerStorage

s"A"and"C"remainin thepositionsdes-

B"isopenedasshownon Fig.43above.Donot

thSprayBarvalvesclosedas thiswillcause

epump.Todrain waterfromthetankvalves,

positionsshownon (Fig.43)andplugat "D"

ed.

nnectsourcetowaterPumpline at"D"

sedasshown(Fig.42). BesureSprayBar

eratingpump.

ecordstheamountofwaterpumpedto

registeranddial.

thefigures ontheregister,includ-

therighthandside andaddtotheregister

smalldial.Todeterminethegallonspump-

readingmustbetakenat thestartofthe

mthereadingtakenat theendoftheperiod.

ntpumpedingallons.

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samountofwaterpumpedtothepugmill

prayBars aremountedoverthePugmill,

teroutletspray.The waterflowstothe

erWaterValve,(Fig.35).Each SprayBar

regulatingtheflowofwater.

edwitha packingglandtopreventleaking

leakdevelopstightenthisnut1/4turn ata

dripisnot objectionable.Donottighten

as thiswillcausetheshaft toheatandscore.

becleanedthoroughlyasoften as

heplugatthebottom,removingthescreenand

operatewatersystemwithscreenremoved.

doccasionalcleaning.SeeAccessorySection.

alttoget intothemeter.

ORAGETANKismountedonthesideofthe Mixer

waterorbitumen.Alargemanholeislocated

ndofthetankare usedfordrainingandclean-

e tanknearthebottomisprovidedfor heating

HeaterBurner.A thermometerishousedatone

etemperatureofthebitumen.(SeeFif.35).

kcanbe usedforbothasphaltandnater,

tankthoroughlyafteruseand drginwell.If

k,itwillcausethe asphalttofoamviolently

hetankshouldbedriedthoroughlybeforeusing

nused,the tankshouldbeflushedoutwith

used,flushwithcreosoteoil.Thisis

w jallonsinthetank,circulatingwiththe

ning.TheMixershouldneverbe trailedwith

the tank.

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NC.R-

andFuelTank

R(Fig.46)isanAeroiltorch-typedistillate

epumpedtogetherthroughheatedcoilswhich

heburnerplugemitsa spraywhichburnsin-

edon thebracketsothattheflameenters

theheatpassingthroughthetube andoutthe

rnerisused,theasphaltin thetankmustbe

pump.

uldbeusedONLYforkeepingasphaltat pumping

oingalltheheatingexceptafteremergencyshut

dwhenthelevelofthe asphaltinthetank

ube.Thenaphthaorkerosenefuraesfromcut-

erefore,caremustbeexercisedtokeepanyflame

velofasphaltisnot belowthelevelofthe

twillnotregistercorrectlyanditwill beim-

emperatureoftheasphalt.

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.46 andfill0gallontank towithin

p withfuel.

elinthis burner.Ifkeroseneisnot

eusedas asubstitute.Diesel

askeroseneasitwillcausethe

dedwithcarbonmakingnecessary

ntofcoils.

yhand) verytight,andseethatall hose

ngsholdairor fuelunderpressure.

thetankis closedandtheregulatingvalve

sclosed.Pumpair intothetankuntil

tes40poundsof pressure,thenopenthe

notallowthepressureto gobelow25

,opentheregulatingvalveontheburner or

eprimingpanonequarterfull offuel

eldown intothepanwitha pieceof

apieceofrag,burlap orwasteinthe

easawick.Closethevalveand lightthe

orchto pre-heatforaboutfiveminutes.

sedwhentheburner"blows"afteraminute

riod.Thisi scausedbytheheatedfuel

and doesnotmeanthattheburner has

odetermineiftheburneris sufficiently

alveslowly.Ifthe burnerplugreleasesa

a steadybluishflamewithnoindication

adyforoperation.Otherwise,continue

bestefficiency,alwaysusethecleaning

lugimmediatelyafterpre-heating,and

in operation.)

ueloilthe flamewillbeorange.

burnervalve(6)slowlyandoperatewith a

two,thenthevalvecanbeopenedto

rn,oralittle moreifnecessary.

goingout,sputteringorthrowingrawfuel,

heatedoroperatedwith the

essary.Thisallowstoomuchcold

olingthemoffandpreventing

latethelengthoftheflameby

ndnotsomuchby thevalveat

kpressureifthe flameistoo

bove5pounds.

ankfor refilling,orforanyotherreason,

wlyby turningthecombinationfiller

out one-halfturn,nomore.Neverun-

eador bodyoverthetopofthe tank.

uentlywithS.A.E.#10oil.If theleather

anddoesnotcatch,removetheplungerrod

he leatherwithoil,workingitin with

to staydownattheendof astroke,it

thepump.Thisis anindication

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leverhastwopositions:operatingand

hesinthe supportbracket.Theengineshould

rfull load.Afterwarminguptheengine,advance

sitionbeforeengagingthe masterclutch.The

periodicallyandcanbedoneeasilyby counting

haftswhichshouldbe 52aminute.

er

edbya leverwhichoperatesafrictionband

JackShaft.Thispumpcan beengagedatanytime

asterclutch.Engageslowlytopreventdamage

heshearbolt.

pLever

edbya leverwhichoperatesafrictionband

nJackShaftwhichcanbeengagedwithoutthrowing

ageslowlytopreventstrainingthe beltdrive.

ever

piscontrolledbya frictionbandclutchloc-

shaftwhichallowsittobe engagedatanytime

asterclutch.Alwaysengageslowlytoprevent

rbolt.

ya leverwhichoperatesajawclutchlocated

It isnecessarytodisengagetheclutchbefore

preventdamagingthedrive ortheclutchjaws.

byaleverwhichoperatesa jawclutchloc-

tershaft.Itis necessarytodisengagethemaster

sjawclutchtopreventdamagingthemachineryor

r

aybaris controlledbyaleverwhichoper-

isvalveshouldalwaysbeopeneither to'sendbit-

othetank;NEVERCLOSED.ItdoesNOTcontrolthe

pumpedsoit shouldalwaysbefullyopenedto

baris controlledbyahand-operatedwater

vescontrolthesmallerbarswhichconnectto

amountofwateraddedis controlledbyadjust-

alves.

mWheel

lisoperatedbya handwheelwhichraisesor

meansofcables.A ratchetwheelanddoglocks

sition.

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utoffGateLever

ffgateiscontrolledbya leverwhichslides

eningin thedischargedamcontrol.Theposition

edtosuittheconvenienceoftheoperator.

rank

we-redintoposition bymeansofahandop-

ypawlis providedtopreventtheconveyorfrom

rator.Severalmenarerequiredto assistthe

singand pushingtheconveyorbackonthesup-

er

gthe Mixerinplaceareoperatedbya

atedattherear ofthemachineontheoperator's

xer onbituminousmixingwiththe831

tionwiththe 821SoilPreparationUnitwillre-

easerandHelper.This crewofthreewillbe

perintendantfortheefficientfunctioning

sanddutiesarebrieflysummarizedas

encedinthe mechanicaloperationofheavy

yfamiliarwiththefunction,operationandadjust-

theMixerandthecoordinationoftheir funct-

erienceinbituminousandstabilizationworkis

ouldbecapableofdirectingtheGreaser and

heir duties.Hisprincipledutieswillbe con-

ntrolofthemachine.

emechanicalexperienceandaknowledgeofthe

hine,theirlubrication,andbecapableofmaking

tothemachineasdirectedbytheMixerOperator.

scellaneousdutiessuchashandlingoperating

leanupwork.Hemay alsobeusedtoguide trucks

gateanddistributedischargematerialwithin

swillbe inaccordancewiththedirectionsof

s beensetupreadyfor operationasdes-

".Itisnow desiredtooperatetheplant.The

pertainsonlytotheactualoperationofthe

or,withassistancefromGreaserandHelperas

,themachineshouldbethoroughlylub-

vicedaccordingtotheinstructionsprovided.

l checkupismadei'orpossiblerepairsor dam-

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83/476

esizeof theKinneypumpsprocketsshould

of bitumenavailablebyreferringtothein-

dedinthe"ConstructionInformation"section.

nstalledin thepropermanner.

theoperationofthemachine.Startthe

up beforerunningathighspeed.Advancethe

asterclutch,tryingouteachpieceof machinery

hitemsasclutches,chainadjustments,andbelt

oragetank,turnthevalvesasdes-

withtheVikingpumpandengagethepump.If

essary,operatetheburner,rememberingtokeep

atchthethermometer,beingcarefulnotto

egin,start thepugmillandconveyorop-

cessarytousethe masterclutchtodoso,since

ntroltheseunitsmightcausejerkingand damage.

pwithspraybarvalveset nottospray.When

winto thepugmillthevalveis quicklyopen-

atingthetime lagwhichwouldresultifthe

nstarted.Holdthe materialinthepugmilluntil

henopen thecutoffgateandallowit todis-

finishedmixto seethatthepaddleset-

oducingsatisfactorymixing,andthatthe

fare correct.Ifnot,shutdowntheplant

djustments..

ocutofftheflowof materialcomplet-

ntenorfifteenseconds,it willbenecessary

e thestoragecapacityofthedischargegate

owntheMixerwhenit isoperatingin

r,theDryershouldbe stoppedlettingthecon-

mptythe hotaggregateoffthebelt.As soon

creases,turnthe sprayvalvetocirculating

omuchbitumenthroughthe spraybar.

plyrepeatprocedureofstarting,waiting

pugmillbeforeoperatingspraybar.

mpleted,itiinecessarytocleanoutthe

pthemixfromhardeningto suchanextentthat

dthenexttimeitis started.Thestoragetank,

flushed anddrained.

Mixer,disconnectthepipingand raise

under"PlantSet-up".

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R(Fig.51)isadividedsteelbin withacapacity

of materialineachhalf.

s toprovidesufficientstoragecapacity

onswhichwill normallytakeplaceinthefeed-

r,sothat thelevelofthe aggregatecanbe

tip ofthemeasuringgates.Thehopperis div-

ggregatecanbehandledseparatelytoallowmore

onthesideofthehopperto indicatewhenthe

ortheconvenienceoftheoperatormho is

dGRIZZLYBARSCKiiEMSwhichservetokeepout

otsandotherundesirablematerial.Thescreens

etswhichcanberemovedifnecessarytogain

hopper.

hargeChutesarefastenedtodirecttheflow

sintothe bin.Thesechutesaresupportedby

rm andthechutesbothswingdowninto thehop-

el.

hehopperis fastenedanANCHORBRACKET

orinto position.Thehookonthehoist cable

~'henraising theelevator.AGUIDEROLLERis

e hoppersothattheelevatorwill slideeasily

r,nearthetopand.bottomrespectively,are

erPUSHARMSorangle bracesusedtoholdthe

on.Whennot/inuse, thesearmsswingback

held inplacebybolts.

ne,itisnecessarytowatchthe levelofthe

watchingthetelltales(Fig.50)whichswingdown

.Theaggregatelevelmustbemaintainedabove

oportionsofthemixwillnot bealtered.For

shouldbekept about3/4full.Afteroper-

ppershouldbe emptiedandcleaned.Material

auseunnecessarytravelingweightandmightbe

rainedonor settled.

ttentionin thematterofupkeeporad-

ingnecessaryisto besurethepush armsand

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gregateDryerin operatingpositionbefore

Dryer.

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88/476

er

nchstrokeistheusualconnection;thefour-

en oneofthegateopeningsis reducedsothat

msizeofaggregate,usuallybelowoneinch.Then

the openingmaybeincreasedtoassureun-

,rememberingtoincreasetheothergateopening

onoftheplate feeder,rememberthatthis

thehopper.Consequently,theweightofthe

sothatasthe platemovesforward,material

hegate.Asitdoes so,theremainingmat-

owntotaketheplaceof theaggregatewhich

Whentheplatemovesback,thematerielwhich

meback;instead,itdropsoffinto thedrum.

as longassufficientmaterialismaintained

tesupplyis mechanicallycontrolled.

G

uringgates,turntheadjustingnutsto raise

arindicatoronthescrewgivesareadingon the

otheopeningbetweenthebottomofthe gateand

2A).

Fig.52)willneedperiodicadjustmentto

tingfrom thecontinualslidingbackandforth.

beplacedto takecareofthiswear;whileat

gplateis providedforthesamepurpose.

e feeder,removethepinv)hichconnectsthe

kandreinsertin thedesiredhole.Thehole

estheIon-erorsix inchstroke.

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st-oodpracticeto checkthespeedofthe

ethiswillaffectthefeeding.Thisiseasily

esofthe feeder-uhichshouldbeabout49a min-

onthe enginetoobtainthecorrectspeed.

Rollers

urved

wing

and

ng

easit

meter

, rotatingcylindricalshellofspecialheat-

gand threefeetindiameter,inwhichthe

iedas itpassesthrough.

urvedplates andangles,knownasLIFTING

udinally.Theflightspickuptheaggregatefrom

dropitthroughthe hotgasesasthedrum re-

throughthe drumintheoppositedirectionto

driedaggregateis dischargedfromthedrum

.Thischutehasan extensionwhichdirectsthe

xerconveyor.Theextensioncanbereversedto

anglestothedrumfor dischargeoneither

oldstherecordingbulb fromthedialtype

Thisthermometer(Fig.55)must becheckedfor

n.

enbyaheavychainwhichdrivesa large

eoutsideofthedrum.This chainiskepttaut

rwhichmaybe adjustedtokeepproperten-

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wo circularsteeltireskno'.;nasTRUNNION

undtheoutsideof thedrum,oneneareachendof

n smallrollers,knowne.strunnionROLLERS.

mber,oneundereachsideofthe drumforboth

he rollersatanangleof sixdegreesdown-

gingendwhenthemainframeis level.This

s thedrumrevolvesthematerialmillgrad-

elowerordischargeend.The6 slopehasbeen

factory;therefore,thedrumismountedatthat

thatalltheoperatorhas todoisto levelthe

on aslightslope,it willhaveanatural

llortowardthedischargeendas itrevolves.To

tionaryposition,thetrunnionrollersareset at

ontirestoneutralizethis tendency.The

nedbytwosmallTHRUSTROLLERSmountedoneither

unniontire. Ifthedrumshouldstart toshift

emergencysupportsuntilthe trunnionrollers

eckthethrustrollersfromtime totime

eratingproperly.Ifthe tireisridingonly

erthrustrollerthedrum positioniscorrect

uldstarttoride hardagainstonethrust

ebearingtooverheat,it isanindicationof

eTRUNNIONrollersandthedrumshould beshut

.

OLLERS

rs,it isusuallynecessarytoskevjonly

endofthedrum.Theserear trunnionassemblies

y3/lb"atthefactory.WhentheDryerhasbeen

ingthrough,observethethrust rollers.If

inghardagainstthelowerthrust roller,both

kewedmorebyinserting shimsbetweenangleclip

sameamountonboth sidestokeeptheshafts

with(Figs.56and57).

aupper thrustroller,thetrunnions

ewremovedbytakingout shims.

mblyisskewed,thebearingsurfaceatthe

mtire andtrunnionrolleris altered.This

e tiretobein contactwiththerollers.Tore-

cessaryto shimupthebearingswhichhavenot

inobtainfull bearingsurfacebetv;eenthedrumtire

ARINGS

earingsbecarefulnotto allowanygreaseor

ollersortires; otherwise,theywillslipin-

at inspots.Ifgreaseshould getontheroller

hrowalittle sandonthesurfacetostart it

sbeenused foratime,it isgoodpracticeto

he nuts,sincetheheatcausesthedrumto ex-

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d

ew

yin-

angle

fter

d,in-

g

des

If

ainst

e

per

nless

ns(C

ew

to

ers

ouldbe15revolutionsperminute.Sincethe

chineisconstant,thisis agoodwayofchecking

atingat correctspeedof1400RPM.Tocorrect,

ER

gand hotmaterialispassingthrough,it

dialtypeaggregatethermometer.Removeoneof

marked"RemovetoAdjust".Rotatetheplate

djustingscrew.

aggregatefromthedischargechuteandre-

naccuratepocketthermometer.Checkthis

althermometerandifthedial thermometerneeds

gscrewwhichwillturn thepointertothe

ainandifcorrect,replaceplateandscrew.

ometer

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dCone

s

ER(1)(Fig.59)consistsofa refractory-lined

hedischargeendof thedrum.TheCOMBUSTION

lcylinder,likewiselinedwithrefractory,which

e shapeoftheflame.Thefunctionofthe cone

istoobtainproperburningof thefuel.Aftera

therefractorylininginthe chamberbecomesvery

mtheburner (3)tobeconvertedintoa gaswhich

rt holes(4)spacedaroundthelargeopen-

orts admitsecondaryairasrequiredforcom-

moreair isrequired.Steelflapsonthese

tingoffthis airifdesired.

srequiredfortheconeand combustion

enancewouldoccuriftherefractoryshouldbe

blowofsomesort.Ifthis occurs,thecone

takenoffandrellnedwithcastablerefractory

nedinthe MaintenanceSection.

peBURNER(3),(Fig.59)atomizestheoil and

mstheflamefordryingthe aggregate.

thecombustioncone,withthedistancebe-

dge oftheconebeingaboutoneinch.

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burnerunderaboutthirty-fivepoundspress-

tube,and outfoursmallholesonthe end.The

neratonlytwopoundspressurebut aboutfour

ute.Itsurroundsthe holesfromwhichtheoil

ratomizedsprayleavesthe nozzle.

controlledbyaMICRO-REGULATINGVALVEwhich

asycontrolofthe flame.ASTRAINERNEEDLEVALVE

goutimpuritieswhichmightclogthe nozzle

ingofftheflowto relievepressureonthemicro-

estrainervalveisalwayswideopen,adjustments

edmicro-valve.

controlledbyaBUTTERFLYAIRVALVEwhichis

withthemicro-valvetoobtainpropercombustion.

eopenwhenevertheoil valveisopen.Theamount

edbythe secondaryairnozzleontheburner

ne.Asthesize oftheflameincreases,more

othe nozzleisturnedandthe portsareopened

ecientlywithseveralgradesoffuel oils.

willvary from1-1/2to3-1/2gallonsperton

dingprimarilyontheamountofmoistureto be

ate,theamountofaggregatetemperatureraiseand

oil used.

ommendtheuseofa No.4fueloilhaving

ns:

2to20

0to250F.

ver-.1o/o

45,000

ynotover-90to 125

abovemaybe usedifpre-heated.When

oilcaremustbe exercisedtoavoidvaporization

sationswithresultantvaryingflameintensity.

re availabletheymaybeusedinplaceof

oilsofhigherBTUcontent.ThelowerBTUcontent

gherg

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Tm 5-1280 Mobile Pugmill Mixing Plant