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DOCUMENT RESUdE

ED 139 941CE 010 959

-

Tidwell, JosephDiesel Mechanics. Performance Objectives. Basic

Course.INSTITUTION Duval County School Board, Jacksonville, Fla.

PUB DATE- Aug 74NOTE 48p.; For a related document see CE 010 960

AUTHORTITLE

EDRS PRICEDESCRIPTORS

ABSTRACT

MF-$0.83 BC-$2.C6 Plus Postage.*Auto Mechanics; *Behavioral Objectiv-s; *criterion

Referenced Tests; Curriculum Guides; *Diesel Engines;

Grade 10; Maintenance; Mechanical Skills; Repair;

Senior High Schools; *Shop Curriculum; Skill

Development; Vocational Education

Several intermediate performance objectives and

corresponding criterion measures are listed for each of 12 terminal

objectives for a basic diesel mechanics course. The course is

designed as a two-semester (2 hour daily) course for 10th graders

interested in teing diesel service and repair_mechanics; it would

serve_as the first year of_a 3-year secondary school program. Based

on shop manipulative-practices in addition to related classroom

instruction, the focus of instruction is on use of tools and safety,

engine theory, terminology, main stationary parts, major moving

parts, valve gear and scavenging systeMs, fuel injection systems,

bnrning the fuel, lubrication system, cooling system, and governing.

The titles of the 12 terminal objectives are Orientation, Theory.of

Internal Combustion gugines, Operating Principles, Design Variation,

Main Stationary Parts,,Major Moving Parts, Value Gear, Intake and

Exhaust, Lubrication System, Cooling System, Fuel injection System,

Burning the Fuel, and Governing. (This manual and 54 others were

developed for various secondary level vocational courses using the

System Approach for Education (SAFE) guidelines.) (HD)

****_ *****************_ ******************** _****** _***

Documents acquired by ERIC include many informal unpublished

* materials not available from other sources. ERIC makes every effort *

* to Obtain the best copy available. Nevertheless, items of marginal

*,reprodncibility are often encountered and this affects the quality *

* of tbe microfiche and hardcopy reproductions ERIC makes available

* via the ERIC Document Reproduction Service (URS). EDRS is not

* responsible for the quality of the original document. Reproductions *

* supplied by EBBS are the best that can be made from the original.

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NCEIVES

ASIC COURSE

s DEPARTMENTOF HEALTN.

EDUCATION/ WELFARE

NATIONALINSTITLITS

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sEN 011)CiALNA flONAL

INStilVTE OF

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2

Dr. John T. Ciunning

Superintendent of Schools

DUVAL COUNTY SCiOOL BOARD

Mr. William E. Carter ChairmanMr. Wendell P. Holmes, Jr., Vice ChairmanMr. Joseph CullenMr. James- S. HornsbyMr. William S. Mathias, Jr,11-s; Gene W. MillerMr. Huqh Schulman

Dr. Donald W. Johnson

Asociate Superinten -nt, Cur "culum

1) i re

David A. Rigsby

or of Vocational- echnical Education

Charles L. Downing

Supervi or -of Vocational - Technicul Educa_ on

Mr. David A. Broi.

Super 'sor of Industrial Education

Duval County Public SchoolsAugust, 1974

3

ACKNOWLEDGEMENTS

This manual was developed using Sy:-tem Approach For

Education (SAFE) guidelines.

Appreciation and recognition are extended to the following

educators who have assisted in the preparation of this manual:

Mr. Tom Carter, Coordinator

School Industry Education

Joseph Killough, Coordinator

School Industry Education

Mr. Charles Downing, Supervisor

Vocational-Tech:cal Education

The follov ng educator participated as the writer of this

manual:

Mr. Joseph Tidwell, if-- ctor

C ver design anU print

Typi : Sharon Pratt

Ciwster Scivert

0743

DIESEL MECHANICS BASIC

Syllabus of Terminal Pc formane Obj

1.0 Orientation

2.0 - Theory of Internal Combustion Engines

3.0 - Operating Principles

4.0 - Design Variations

5.0 - Main Stationary Parts

6.0 Major Moving Parts

7.0 - Value Gear, Intake and Exhaust

8.0 - Lubrication System

9.0 - Cooling System

10.0 - Fuel Injection System

11.0 Burning the Fuel

12.0 Governing

DIESEL MECHANICS-BASICAccreditation No.: 9243

Length of Course: 2 SemestersTime Block: 2 Hou 7 Daily

COURSE DESCRIPTION

This course is prepared to train students who are inter-ested in being diesel service and repair mechanics. Thecourse consists of shop manipulative practices in additioto related classroom instruction. Basic instruction in-cludes: use of tools and safety,_engine theory, terminology,main stationary parts, major moving parts, valve_gear andscavenging systems, fuel injection systems, burning thefuel, lubrication system, cooling system_and governoring.This prepares the student in necessarY skills, attitudes,technical knowledge, plus ability to get along with otherpeople.

360 Hours

DIESEL MECHANICS-BASIC

TERMINAL PIWOWANCE-OBJECTIVE NO. 1.0 Orientation

=Upon completion of this unit on orientation 902a of the students willdemonstrate through 8026-correct responses to a criterion test, ob-jective knowledge of the career opportunities for diesel mechanics,basic internal combustion engine principles, course education ac-tivities, safety, hand and power tools and school policy handbook.

NO.

1.1

1.2

1.0

By researching the class 1.1ified advertisements intelephone book, city directory and occupationalinformation handbook thestudent will list twentyjob opportunities fordiesel mechanics in thisarea.

The student will demon- 1_2strate his comprehensionof the fuel air mixtureignition in gasoline anddiesel engines by read-ing pages 11 through 14of text and answeringtest questions correctly

1.3 The stUdent will distin- 1.3guish two important ad-vantages of diesel en-gines when compared togasoline engines. Bylisting two advantageswith 100% accuracy.

1.4 the, student will distin-guish two important disavantages of diesel en-gine when compared togasoline engines. Bylisting two disavantageswith 100% accuracy.

Test attached.

Submit written report coveriAg outlineof training for diesel mechanics andlist of twenty places of employment.

State air and fuel m xture is ignitedby spark in_ gasoline engines. State aironly is compressed high enough to ignitethe fuel when injected into diesel en-gine.

List two advantages of the dieselengine over the gasoline engine.

1.4 List two disadvantages of the dieselengine Ahat gasoline engines do nothave.

-

CO

TERMINAL PERFORMANCEOBJECTIVE NO. 1 . 0

sE_DIESEL MECH. NICS-8 SIC

_ ned) Orientation

NO.

1.5

1.6

7

1.8

IATEPERFOR(ANCE _OBJECTIVES NO. CRITERION MEASURES

The student given a saple progress chart toexamine will demonstratehis understanding of theeducational.activitiesof related instruction,shop work activities andhuman relations. He wilpreform the required ac-tivities with at least80% accuracy.

The student will demon-strate his knowledge ofshop fire safetyby mark-ing fire extinguisherlocations and exit routeon shop floor plan with100% accuracy.

The student will demon-:trate his understandino.of the importance of sho-afety by orally or in.ri-ting give at least teshop regulations.

Given a list of ten handand power tools the stu-dent will identify andstate the function of8 of 10.

1.5

1.6

With the assistance of the instructorhe will help maintain records and in-formation required by course productstandards and progress chart. Thestudent will be shown typical productstandard forms and have the requiredactivities and human relations explainedo him.

e

Mark fire exit route and mark locat onof 7 or 8 fire extinguishers correctly.

1.7 rite or state ten safety regulationsappliable to the diesel mechanics shop.

1.8 Identify and write the "linctionfollowing hand ahd power tools.

1. Ratchet & socket2. Valve refacing machine3. CombinatiOn wrench4. Impact wrench5. Drill & grinder6. Micrometer7. Valve sert grinder8. Spaner wrench9. Hinge pull handle0. Vise grips

the

TERMINAL POBJECTIVE

NO.'

E DIESEL MECHANICS-BASIC

ORM4XCE1 0

MI( ED lATEPERFORMA2CE OBJECTIVES

1.9 After being read theschool policy handbook,the student will demon-strate his understandingof school policies bylisting actions that willcause expu1sion from theschool system with 80%accuracy.

Orientation

CRITERIO N )WASURES

1.9 Student will state or list three actionsthat will cause expulsion.

9

DIESEL MEC- BASIC

1.0

The first diesel engine patented in 1892 was designed toburn:A. KeroseneB. Heavy oilC. Powderd coalD. Gasoline

2. An Englishman He_bert Ackroyd Stuart patented an oil enginein 1888 ignition of the'fuel and air mixture was by:A. Electrical sparkB. Heated glow plugC. Heat of compressionD. Hot surface of chamber

Directions: Circle the letter "A" if you agree with the folioing statements. Circle the letter "D" if you disagree.

A D Diesel engines require no ignition systems.

4. A D Diesel engines draw into the cylinder only air andthen compresses it.

Which of the following type hammers would be used when drivins--2Put a rivet or pin with a punch.A--Ball peenB. ClawC. Rubber face malletD.. Lead face mallet

6. Box end wrenches used for heavy duty work have how many points?A. 6 onlyB. 12 onlyC. .8 onlyD. --L16 'only

. The type chisel which would be used to split a seized nut is?A. Cold chiselB. Diamond point chiselC. Cape chisel-D. Round nose

Which of the following types of gauge is used for measuringgaps or clearances?A. Radius gaugeB. Ring and plug gaugeC. Surface gaugeD. Feeler gauge

When using a bench grinder, you should always:A. Wear a face shield or gogglesB. Wear_gloves to protect handsC. Keep tool rest adjusted above the center line of the

wheelD. Do all of the above

10. The master switch which controls all power in the main-tenance shop normally is located:A. In the center of the shopB. In the tool roomC. At the rear ofthe shopD. Just inside the shop entrancc

DIESEL MECUANICSBASIC

TERMINAL P OFXANCE-OBJECTWE NO 2.0

Upon completion of this unit 90 P t

80% correct responses to a:criterionof internal Combustion.

Theory ot Internal Combustion

students will demonstrate throughobjective knowledge of theory

INTN)IATEPERFORMANCE OBJECTrvEs

The student will list inthe order they occur thestrokes of a four cycleand a two cycle dieselengine with 80% accuracy

The student will demon-strate his understandingof two and four strokecycle diesel engines bymaking a line drawing ofa four and two strokecycle engine_cylinderunit with 80% accuracy.

The student will explainthe difference betweeninternal and externalcombustion. Processorally Or in writing wit80% accuracy.

2.0

2.1

CRIT_ ON

Test attached

List correctly in the order they occurthe strokes of four cycle and two cyclediesel engine.

2.2 Make a line drawing of a cylinder unitof a two ,,,troke cycle and a Eour strokediesel engine.

2.3 Explain the difference between internaland external combustion process.

DIESEL MECHANICS - BASIC

2.0

Combustion in the true diesel cycle occurs at constant

iCombustion n the Otto cycle o-curs at constant

The straka of a diesel engine piston:A. Is always the same as the cylinder bore measurement.B. Is-,the distance the top of the piston travels when

moving from top center downward to the bottom centerposition. =,

C. Is the length of the connecting rod.D. Is the distance -he piston travels in one complete

engine cycle.

4. In what order do the sr okes of a four stroke cycle engine ococcur?A..._.C9MpTpssion, Power,.exhaust, intakeB. Compression, power, intake, exhaustC. Intake, compression, power, exhaustD. Intake, compression, exhaust, power

Two stroke cycle diesel engines produce a power stroke ineach cylinder:A. Once in every two revolutions_of. the crankshaft.B. Once for every four strokes of the pistonC. Once for every two strokes of the pistonD. Directly after the exhaust stroke.

6 On two stroke cycle engines using exhaust ports, the inletports are uncovered first as the piston moves downward onthe power stroke.True or False

7. The compression ra-ion is the ratio af the whole cylindervolume to the least cylinder volume.True or False

Fuel oil is injected into the diesel engine cylinder at theend of the stroke with the piston at or nearlyat top dead center.

Gasoline engines usually depend upon a fo- supply-ing the proper fuel-air mixture.

-10. A3uring which stroke in the operating cycle of. ,a four strokecycle engine is the greatest force exerted on the pistonhead7 I 3

e_.

-

A. Intake

B. Compression

2. 0

Continued

C. Power

D. Exhaust


TthINAL P ORMANC E

OBJECTIVE NO . 3.0 Operating Principle

_Upon completion of the unit on operating principles of reciprocating:internal combustion engines eighty five percent of the students will.aOhieve seventy five percent or better on a criterion examination.

3.1

INTLRMED IATEPERFORMANCE OBJECTIES

The student will demon-strate his understandingof the ignition processof fuel air mixture ina gasoline engine by cor-rectly identifying sparkplup, distributor, ig-nition wires and carbu-rator on an illustrationof a gasoline engine 80%accuracy.

2 The student will demon-strate his understandingof the compression ig-nition principle of die-sel engines_by explaininghow the higher compression ratio drives thetemperature of the com-pressed air high enoughto ignite fuel when in--jected into the cylinde-with 80% accuracy.

3.3 The student w-..11 explainthe power loss of twocycle engines due toscavenging inefficencyand power consumptionof the blower using wallcharts or dut away en-gine assembly with 80%accuracy.

0

. 1

. 2

minimum mnsuREs

Test attached.

Correctly identify the spark plugs,distributor, ignition wires and car-burator of a gasoline engine.

Correctly explain-the pressure andtemperature relation of the air duringcompression stroke, approximately 20Frise for each pound of pressure.

Correctly explain incomplete air ex7change in cylinder of two cycle enginesand power required to drive the blowerfor air pressure.

camsE DIESEL MECHANIC -BASIC

CE0 (cora Id) erating Principles

4

7

Using wall charts or projection device of enginetiming gears. The stu-dent will explain whyvalve timing of four-cycle engine requiresthe camshaft to revolveat one half crankshaftspeed with 80% accuracy.

Using wall charts orprojection device ofengine timing gears.The student will-ekplainwhy the crankshaft andcamshaft of two cycleengines revolve at_thesame speed with 80% ac-curacy.

Using wall charts, pro-jection device_or cutawaengine the student willdescribe how the fly-wheel mass absorbesenergy on power strokesand giVes Up energy oncompression strokes with80% accuracy.

..Using wall charts pro-jection device or cutawaengine the student willdemonstrate his under-standing cif how a super-charger increases thepower output of an en-gine with 100% accuracy.

.4

6

7

atITERION

Correctly explain how piston has tomake four strokes or two revolutionsfor each cycle.

Correctly explain how intake and ex-haust strokes are eliminated by pumpingaction of scavenging air pressure.

Correctly explain how mass of the fly-wheel speeds up on power strokes andslows down on compression strokes dueto kinetic energy.

Correctly demonstrate understandingthat air_pressure in the cylinder isincreased before the compression strokebegins in a 'super charged engine.


3.0

1. Two reasons for compressing air to a high pressure inthe diesel engine cylinder - (Circle two choices)A. This permits the use of a smaller flywheelB. The temperature of the air,is raised to a point where

it will_ignite fuel oilC. The engine will run more smoothly between power strokesD. Formation of carbon is preventedE. More power can be obtained from a combustible mixture

which has been highly compressed before burning.

2. The piirpose of the flywheel is toA. Counterbalance the cranic throws on the crankshaftB. Keep the engine running smoothly between power StrokesC. Provide a belt driving surfaceD. Prevent the engine from overspeeding

3. The supercharger - (Circle two answers)A. Provides scavenging air for two - stroke-cy le diesel

enginesB. Must be on all four stroke cycle diesel enginesC. Makes it possible to obtain more power from a given

engineD. Simply provides a greater volume of air at normal

atmospheric_pressure.B. Makes it possible to restore most of the power lost

when an engine is operated at high altitudes above sea level.

A supercharger forces compressed air into the cylinders ofthe engine.True or False

S. Flywheels are necessary on all diesel enginesTrue or False

6. The brake horsepower of a diesel engine is:A. The amount of horsepower developed within the engineB.--The amount of horsepower developed by the friction of the

engineC. The amount of horsepower developed by the heating valve of

the fuelD. The net amount of horsepower available at the crankshaft

of the engine.

CONT.

The volumetric efficie cy of an unsupe-rOarged diesel engineof the four stroke cyc,e type:A. very low at,sloWer engi e speedsF Xs the ratio of the actual volume of i-ir entering the_gine cylinder during, the intake stroke to the volumeof air equal to the piston displacement.Is not affected by the temperature of the engine partswhich the intake air contacts while entering the enginecylinderD. Ts not affected by the value timing

Pistons with small diameters and short _rokes have lowerrubbing speeds and inertia forces than those with largerdiameters and longer strokes.True or False

9 An air pump must be used on a two cycle diesel engine.True or False

10. Both the intake and the exhaust valves of a four strokecycle diesel engine are closed during the strokeand the stroke.

OMME DIESEL MECHANICS-BASIC

ORMANCE4.0 Diesel Design Variations

JIptin completion of the unit on diesel design varations 90% of the stu-Aents will demonstrate through 80% correct responses to a criterion'test, objective knowledge of diesel engine design variations.

4.1

4.2

Following instruction onengine design varationsthe student will demon-strate his understandingOf single_at-tion, double-acting and opposed pistoengines by making a linesketch of each type cy-linder unit with 80% ac-curacy.

4.0

The student will explainwhy engines are difficulto classify by listingtwo examples of how grouings overlap with 80% accuracy.

4.3 Using wall charts andshop engine assembliesthe student will explainwhy small four strokescycle diesel enginesdiffer from automotivegasoline engines with'80% accuracy.

4.3

4-4 Given an illustration of 4.4four basic diesel enginecylinder arrangementsthe student will identifyeach with 80% accuracy.

Test attached.

Make an accurate line sketch of thethree type cylinder units.

Correctly demonstrate that classificationis difficult by listing two groups thatoverlap.

Correctly point out diesels have moremain bearings and have heavier con-struction to withstand high pressure.

Correctly identify in line, V type,flat and radial diesel engine cylinderarrangements.

9

XFSININAL PER1ORMAIME1ECT1VE NO. 4 0 (con d)

cantsE DIESE ECHANICS-BASIC

lUsing black boar& andchalk the student willdeMelistrate his under-standing of variations-in piston action of die-sel engines with 80% ac-curracy.

Using wall charts orcutaway engine assembly,the student will explainthe difference in oilspray and oil circula--tion-methods of pistoncooling with 80% accu-racy.

Given an illustration ofthree- bvic engine cy-Iinderdesigns the stu-dent will identify eachwith 80% accuracy.

4.5

4.6

4.7

0

Diesel Design Variations

Correctly illust_ate a single actingand a double piston design using .

black board-and chalk.

Correctly explain the oil spray and

oil circulation methods of piston cool,-

ing.

Correctly identify.dry, wet and in-

tegral type diesel cylinder liners.

9243


T.P.O. 4.0 Design Variations

Criterion Test-

Directions:-statements.

1. A D -

2. A D

Circle the letter "A" if you agree with the followingCircle the letter "D" if you disagree.

Diesel Engines may be classified in several ways; op-erating cycle, piston action, piston connection, cy-linder arrangement, method of fuel injection and eng-ine speed.

Diesel Engines may be grouped into the followinucat7egories because they differ in size, speed and use;small four-cycle, small two-cycle, medium-size four-cycle, medium-size two-cle and large size.

A D - Diesel and High Compression Gas Engines have fourbasic cylinder arrangements they are; cylindersin line, V-arrangements, flat, and radial.

4. A D Cylinders are generally cast in blocks containing sev-eral cylinders, but in few designs they are cast in-dividually.

S. Small Diesel Engines which have an automotive design frameA. Always have each cylinder cast seperately.B. Have:crankshaft supported by the main bearings

caps.C. Use welded centerframes for light weight.D. Cannot use through bolts as they interfere with

the cooling water jacket arrangement.

6. In opposed piston enginesA; Both faces of the piston are used.B. The crosshead principle must be employed.C. Two crankshafts are used.D. Two injection systems must be employed.

7. On a Radial Engine of four cylinders, there are,A. Four connecting rods and four crankpinsB. Four connecting rods an4 two crankpins.C. Four connecting rods and' one crankpin.D. Two connecting rods and two crankpins.

8. In engines which use A-frame construction, through boltstie the cylinder heads and A-frames to the bedplate andtake the stretching forces due to combustion. T F

In most cases a diesel engine "model" represents a specif-ic design in a specific cylinder size. T F

10. Speed, as a means of classifying engines, isSatisfactory, as it indicates the type of use an

21

9243


T.P.O. 4.0 Design Variations

4.0 Criterion Test (con't)

engine will be- put to._Satisfactory, as it indicates the amount of in=ertia_forces developed_within an engine.

C. Unsatisfactory, as it does_not indicate the amountof inertia forces developed within an engine.

D. Unsatisfactory, as it does not indicate the typeof duty for which an engine is suited.

COURS

CE5 0

DIESEL MEC NICS-BASIC

Main Stationary Par

n-Completion of this unit on main stationary parts consisting ofInainframes, cylinder liners and cylinder heads. 90% of studentsm01,-,;demonstrate through 80%-sorrect responses to a criterion test,liOctive knowledge of main stationary parts, the students will alsodVibnstrate his ability through job assignments to disassemble, clean,ns ect for wear and reassemble components during laboratory assign-pits -using-manufacturers vrvice manuals, tools and materials. Clear-nee measurements must be - .002 and no abnormal times.

IATENO MANCE OBJECTIVES

. I Given an illustration of 5.1the tWO-tethods of en-gine frame constructionthe student will_iden-tify each method with80% acturacy.

Given a list of fourtypes of engine 'framedesign the student willdescribe each type framewith 80% accuracy.

The student will de-monstrate his under-standing of the functiorof the main frame bylisting three jobs pre-formed by the main sta-'tionary frame with 80%-accuracy.

Using wall chart or cut-away engine the studentWill-explain the threebaSiC,functions of thecylinder liner with 80%accuracy.

:Given an illustration'Of_three,types of cy-Iinder,liners_the stu,-dent.Will identify eachHWith-_80% accuracy.

.2

.4

5

CRITERION_ ELEASIMES

Test attathed.

Correctly identify cast and weldedmethods of frame construction.

Correctly de cribe the four_types ofengine frame design one piece, two-piece, three piece and "A" frameconstruction.

Correctly list the function of engineframes;

1. Support and align engine parts2. sist forces of engine operations3. .pports auxiliaries, provides

oil sump and cooling passages.

Correctly explain how cylinder linerseals coApression and .combustion, takesside thiost of pistons.' and transfersheat from the piston.

Correctly identify dry, wet and integraltype cylinder liners.

23

mom DIESE ECHANICS-BASI

MINIM PRJoR1fANCEDBJECTWE NO. 5 0 (contId)

IMECE OBJECTWES

_ _ _ - -6IJsalig a wall chart theStUdent Will explain thefuliction of the cylinderhead with 80% accuracy.

7 USing wall charts and cuaway engine the studentwill locate the enginewater jackets and coolingpasSages in the cylinderhead with 80% accuracy.

.87Pollowing instruction on-main_stationary parts thestudent given a shop-lab-oratory engine will dis-assemble clean, inspectparts for wear. Reassem--ble engine using manu-facturers shop manuals,tools and material. Stu-dent will measure clear-afices_to .002. Re-assemble engine and testrun.

6

5.7

5.8

Main Stationary Parts

CRITERION MEASURES

Correctly explain function of thecylinder head is to seal compressionand combustion.

Correctly identify cooling passagesin engine block and cylinder head.

Disassemble, clean, inspect parts forwear. Measure clearances to +.002using shop manual-reassemble engine-and test run.

9243


5.0 - Main Stationary Parts

5.0 - Criterion Test

. The two basic methods of engiae frame construction arecasting and fabrication. T F

2. When a diesel engine uses a bedplate in its construction,the main bearing caps bolt downward upon the crankshaft.T F

3. Large engines use_individual cylinder heads, small enginesuse groups of heads cast together. T F

4 The cooling water jackets on most diesel engines are arr-anged

A. So that the water circulates all of the cylinderliners before it can flow to the heads-.

B. For circulation of water downward through theheads into the top of the liners to bring coolwater to the hottest area first.

C. With seperate circulation of water through the-cylinder heads only and-through the liners onlyto maintain more even tempatures'.

D. So that tempature strains are reduced by havingthe water enter at the lower end of the linersand flow upward into the cylinder heads.

5. Cylinder liners are generally used on diesel engines be-cause

A. Liners may be easy replaced after the cylinderwalls show wear.

B. Liners provide a more efficient cooling system.C. Rubbing speeds are reduced through the use of

liners.D. Liners provide a better lubrication surface.

6. Cylinder liners areA. Usually bolted to the cylinder head.B. Pressed into the engine frame or block from the

lower end of the cylinder.C. Sealed against water leakage at the bottom end

by rubber rings.D. Head in place in the engine frame or block by

screw thraeds at the upper end of the liner.

7. The function of an engine's stationary part is toA. Add power tethe engine.B. Keep the engine firmly Attached to its suppo

ing base.C. Furnish a framework on which to attach.or enclose

movable parts,D. Regulate crankshaft speed.

9243

DIESEL MECHANICS BASIC

T.P.O. 5.0 - Main Stationary Parts

5.0 - Criterion Test (con't)

Directions: Circle the letter."A" if you agree with the follow-ing statemen s. Circle the letter "D" if you disagree.

a

8 k D The structural parts of a diesel engine are subject-ed to the firing pressures which tend to push_the cy-linder heads and crankshaft bearings apart and also_tothe inertia forces pf the pistons, connecting rodsand crankshaft which try to twist and bend the engineframe.

A D - Engine frame designs fall into two classes verticalframes and horizontal frames and may be one, two orthree piece construction.

-10. A D - Cylinder heads for four-stroke7cycle engines haveonly to provide openings for the valves and the in-jector nozzle, thus making them very simple castings.

TIMMINAL PERFORIdANCECULTUNIVE NO. 6.0

Upon completion of this unit on major moving parts consisting of pistons,:piston rings, connecting rods, wrist pins, crankshafts, bearings and fly-wheels, 90% of the students will demonstrate through 80% correct responses,to a criterion test, objective knowledge of major moving parts. The stu-"dent will demonstrate his ability to disassemble, clean, inspect, for wearand reassemble components during laboratory assignments using manufacturersservice manuals tools and materials. Clearance measurements must be .002and no abnormal times.

=NOE DIESEL MECHANICS-BASIC

Major Moving Parts

.1

6.2

6

Given an illustration ofa.piston the studentwill identify the va-rious parts of a pistonand the Method of cool-ing used with 80% ac-curacy.

Given au illustration ofa trunk and crossheadtype piston the studentwill identify each typeand state applicationof each with 80% accurac

The student will demon-strate his understandingof piston rings by stat

orally or in writ-ing the twoctyves andfour functions of pistorings with'80% accuracy.

Given an illustrationof four types of pistonring joints the stu- .

dent will identify thejoints with 80% ac--curacy.

4

6.0 Test attached.

6.1 Correctly identify parts of a pistonand method of cooling on illustration.

6.2 Correctly identify piston types andstate application of each.

Coriand

iden.ify piston r ng typesiour funct:!.ons of rings.

6.4 Corr,-2 y identify piston ring jointson ilk. tration.

z: 7

E DIESEL MECHA

TIMMINAL P2OBXANCEOBJECTIVE NO. 6. 0 (eont Id) Ma-or Mc:win- Parts

NO

6.5

6

6.7

6.

6.

INTERMIATEPETLFORNANCE OBJECTIVES NO ITERION MEASURES

The student will demon- 6.5strate his understanding 0of the function of con-necting rods by statingorally or in writing thepurpose of the connec-ting rod with 80% ac-curacy.

Given an ill stration of 6.6four types of crankpinend designs of connect-ing rods the studentwill identify the va-rious types with 80iaccuracy.

Given an illustration of 6.7four types of wrist pinarrangements the stu-dent will identify eachtype and state the func-tion of wrist pins with80% accuracy.

The student will demon- 6.8strate his understandingof crankshafts orally orin writing by statingthe function and forcesthe crankshaft with-tands with 80% accuracy

Given a list of four 6.9functions bearings mustpreform the student willdemonstrate his know-ledge orally or in writ-ing by stating how eachfunction is accomplishedwith 80% accuracy.

Correctly state the function of theconnecting rod.

Correctly identify four types ofcrankpin end designs of connectingrods.

Correctly identify four types o_ wristpins and state the function of wristpins.

Co.-ectly state the crankshaft functionand the forces acting on it.

Correctly state four functions of bear-ings and how functions are accomplished

TEDIUM. PERMMOUJICEOBJECTIVE NO. 6 0 Id)

SEIESEL MECHANICS-BASIC

MaiorMqvjn f Parts

IATECE OBJECTIVESNO.

6 11

The student will demon-strate his understandingof flywheels orally orin writing by statingthe- function of fly-Wheels and two factorsthat determine its' sizewith 80% accuracy.

Following instructionon major moving partsthe student given a shoplaboratory engine orcustomers engine, willdisassemble, clean, in-spect parts for wear.Reassemble engine using

r

tLarmfacturers shop manualools, parts and materialStudent must be able tomeasure clearances towithin .002 and workat an aEceptable rate,engine must be test runafter repair.

CRITERION MEASURES

6.10

6 11

5 ,

Correctly stati the function of flwheels and two actors that determlneits size.

Disas emble, clean, inspect parts forear. Measure clearances to- 4- .002sing shop manual-reassemble engine

and test run.

9243


T.P.O. 6.0 - Major Moving Parts

6.0 - Criterion Test

1. Pistons of the trunk type are tapered from the top of theskirt to the top of the crown to provide slightly moreclearance in the high-tempature zone. T F

2. Aluminum pistons will expand more than cast iron pistonunder the same operations conditions and are thereforeoften designed with .

A. Split SkirtsB. Slipper SkirtsC. Full Trunk SkirtsD. Full Trunk and Slipper Skirts

3. Compression rings are forced against the wall of the cy-linder by the -----,

, A. Spring action of the ring only.B. Spring action of the ring and the force of the

gas pressure.C. Pressure of the lubricating oils.D. Tapered construction of the ring face.

4 Oil control rings are designed to scrape excess oil from thecylinder walls on both the upstroke and downstroke of thepiston. T F

S. Connecting rod bolts are snugly fitted in their holes in theconnecting rod and cap to offer resistaace.to inertiaforces which act sidewise against the rod bearing. T F

6. There are three methods commonly used for fastening thepiston pin t) the piston and connecting rod, they are;

A.B.C.

7. Crankshafts must withstand torsional forces as well as forcestending to bend them. T F

8. The vibration damper is a device designed toA. Balance camshaft speed with crankshaft speed.B. Reduce twisting strain on the crankshaft.C. Brake the flywheel during engine speed reduction.D. Reduce flywheel vibration.

9. Two important factors that help make a good ins al--.

onof bearing shells are

A. Bearing spread and bearing crush.B. Bearing width and bearing crush.C. Bearing spread and bearing thickness.D. Bearing width and thickness.

3 0

-

9243

DIESEL MECHANICS - B-

T.P.O. 6.0 Major Moving Parts

6.0 - Criterion Test (con't)

10. In addition to reducing engine speed fluctuations, the fly-wheel often serves as a

A. Power take off for the camshaft and a pressuresurface for the clutch.

B. Pressure surface for the clutch and startingsystem gear.

C. Starting system gear and a power take off for thefuel pump.

D. Power take off for the fuel pump and a timingreference for the injection system.

TERMINAL PUYORMANCEOBJECTIVE NO. 7.0

CCRWE PIESE.L _MECH.ANIC$7BASIC_

Valve Gear, Intake and Exhaust Systems

Upon completion of this unit on valve gear, intake and exhaust systems'90% of the students will demonstrate through 80% correct responses toa criterion test, objective knowledge of valves, intake and exhaustsystems. The student will demonstrate his ability to disassemble, clean,inspect for wear and reassemble components during laboratory assignments.

71.ising manufacturers service manuals, tools, parts and material clearancemeasurements must be 4- .002 and no abnormal times.

7.1

INTERMEDIATEPERFORMANCE OBJECTrvEs

Given illustration ofa valve assembly thestudent will identifythe various parts ofthe assembly with 80%accuracy.

7.2 Using a ai chart of afourstroke c .cle enginethe student will demon-_trate his knowledge ofvalve actuating gearorally, by tracing thepower flow from thecrankshaft to the valvewith 80% accuracy.

7 The student will demon-strate his understand-ing of valve timing bystating orally or in.riting why valves mustbe timed and threetypes of drives em-ployed with 80% accuracy,

TA Using a wall chart-thestudent will demonstratehis knowledge of the airintake system by tracingthe flow through he in-take filter into the cy-linder and naming threetypes of air filters em-ployed with 80% accuracy,

7 0

7 1

7.2

7.3

7.4

CRITIMION 14ELTURES

Test attached.

Correctly identify various par s ofthe valve assembly.

Correctly state the power flow inthe valve train from the crankshaftto the valve.

Correctly state why valves must betimed and three types of drives usedin valve timing.

Correctly describe the flow of intakeair through the filter into the cy-_-Under and name three types of'airfilters.

0 4-1

comsE DIESEL MECHANICS-BASIC

TMMD1AL PERFOM1ANCEOBJECTIVE NO. 7 0 (con

NO.

7.5

. TEPERFORMANCE OBJECTVES

Given an illustration ofthe basic methods ofscavenging air flow intwo stroke cycle enginesthe student will identifeach method and describethe events and air flowthrough the cylinder wit80% accuracy.

7.6 Using wall charts or cutaway components thc, stu-dent will_demonstrate hiunderstanding of enginesuperchargers by.namingthe two basic types Andstating the_power input,air flow and exhaust flo-with 801 accuracy.

7 7 The student will demon-strate his understandingof exhaust systems orallor in writing by statingthe three basic require-ments of the exhaust sy-stem with 80% accuracy.

Valve Gear, Intake and Exhaust Systems

CPULTIMIag laWns

Correctly identify the three basic methodsof scavenging two cycle engines and de-scribe the air flowthrough the cylinder.

Correctly name two types o- supercharge sand state the power input, air and ex-haust flow.

rally or in writing, correctly statethe three basic requirements of thexhaust system.

Following instruction onvalve gear, intake andexhaust systems the stu-dent given a shop labora-tory engine or a customerengine will preform therequired service opera-itions on intake and ex-haust valves, intake airand exhaust systems.The_student will disas-semble the engine or com-

isassemble, clean, inspect parts_forear. Measure clearances to+ .002sing shop manual reassemble engine andest run.

oxmsE DIESEL MECHANICS-BASIC

TERMIMAL PERFORKANCEOBJECTIVE NO. 7 . 0 o Id)

NO.

7.8

PERFORMANCE OBJECTIVES

Valve Uear, Intake and _Exhaust Syste s

ponents as required,clean and inspect forwear. Reassemble engineusing manufacturers shopmanual, tools,_parts andmaterial. Student mustbe able to reject faultyparts and measure clear-ance to within 4- .002and work at an ãcceptablerate. Engine must betest run after repair.

s

MIME DIESEL MECHANICS (BASIC)

TKRMINAL PraYORHANCEOBJMOTIVE O. 8 . 0 Lubr icat i n System

Upon completion of this unit on lubrication system 90% of the students willdemonstrate through 80% correct responses to a criterian test, objectiveknowledge of lubrication systems. The student will demonstrate his abilito perform required service operations on components during laboratoryassignments. Using manufacturers service manuals, tools, parts, and mater-ial. Clearance measurements must be ±.002 and no abnormal times used.

The student will definefriction orally or inwriting.

The student will demon-strate his knowledgeof the laboratory ofthe lubrication systemusing a wall chart showthe four jobs the lub-ricating system mustperform with 80% accur-acy.

Given an illustrationtwo types of lubricat-ning systems the studentwill identify and des-cribe each system with80% accuracy.

The student will demon-strate his knowledge ofwet and dry sump engineand auxiliary equipmentused in lubrication sys.terns, usihg wall chartsor a cutaway engine i-dentify system Ed ex-plain the function ofauxiliary equipmentwith 80% accuracy.

Test Attached

8.1 Correctly explain whatfriction is.

8.2 Correctly showthe four jobsperformed by the lubricatingsystem.

8.3 Correctly identifyand describe thetwo types oflubrication systems.

8.4 Correctly tdentifywet and dry sumplubricating systemsand explain thefunction of auxiliaryequipment.

MIME DIESE

TERMINAL PEREORM&NCEOBJECTIVE NO. S .0 (contld)

ECHA,I BASIC)

Ion Sysiem

,NO.

8.5

.6

8.7

PMFORMANCE 0 TIVES

The student will demon-strate his knowledge olubricating oil deterio-ration by stating orallor in writing the twoprimary sources of deteiotation and the factorthat cause deterioratiowith 807. accuracy.

The student will demon-strate his understandinof lubricating.oil add-itives and treatment bystating orally or inwriting two additives &three types of oil treement used with 80% acc-uracy.

Same objective.

8.5

T ION

Correctly state thetwo primary sourcesof lubricating oildeterioration and therectors that causedeterioration.

8.6 Correctly state twooil additives andthree types oflubricating oiltreatment.

.7 Co rectly define the propertiesof lubricating oil listed:A. ViscosityB. Carbon ResidueC. Pour PointD. Flash PointE. Water and SedimentP. Acidity or Neutralization Number.G. Precipitation NumberH. GravityI. Color

TERMNAL PER101124A-NCE-OBJECTIVE NO. 8 . 0 (cont Id)

comisE DIEsgL MECMANICS(BASIO_

ub

8 9

INTERKSD TATE

P 0 CE OBJECTIVES

The student given a sholaboratory or customerengine will remove,-.4ean and inspect for .

wear on oil pressurepump, using engine shopManuals, necessary tool-and materials. Reassemble and test pump on engine, pump must deliver45 pounds pressure withno leaks.

_ld The student given a sho-laboratory or-customerengine will perform therequired service opera-tions to remove, clean,and replace the lubrica-ting oil filter element.Using shop manuals, nec-essary tools, and mater-ials. Reassemble filterand test engine. Filtermust show no evidenceoil leaks at maximumengine R.P.M.

7

Remove disassemble,clean,-and inspect forwear.on oil pump.Reassemble and test on engine.Pump must deliver 45 poundspressure with no leaks.

Remove,clean, andReplace engine oil filterelements. Reassemble filter and teston engine, filter, must show no evidenceof leaks at maximum engine R.P.M.

INAL PERFORMANCEOBJECTIVE NO. 9.0

COURSE DIESEL ,WILUANICS BAS

Cooling System

completion of this unit OR Cooling Systems 90% of the students will demonstraterough 80% correct responses to a criterian test, objective knowledge of coolingstems. The student will demonstrate his ability to perform required service oper-

ations on components during laboratory assignments. Using manufacturers servicemanuals, tools, parts, and material. Clearance measurements must be t.002 and noabnormal times used.

INTERMEDIATEPERFORMANCE OBJECTIVES

The student will statethe purpose of the coolingsystem orally or in writingwith 80% wx7uracy.

Tae st ill state twome-017,17 ;7d two types OferTi.te co---.:.15..zg systems and

do it ozally or written us-ing Cr,.arts Or cutawayengine with. 80% accuracy.

Same Objective Write

The student will explainthe two types of enginecooler construction orallyor in 't,-riting using wall

dharts -r cutaway engineth Fu4 accuracy.

Test Attached

Correctly state thepurpose of the cooling system.

Correctly state two methodsand two types of engine coolingsystems.

Correctly explain the function of thefollowing seven units in the enginecooling system:A. Water JacketsB. Water PumpC. Fan and ShroudD. Radiator and Pressure capE. ThermostatF. Temperature GaugeG. Oil Cooler

9.4 Correctly explain the two typesof engine cooler construction.

The s4 t will explaine ion of cooling

syst /..--.mostats and

tetc engines must beranA aear the permiss-

iaidts in writing orany with..wall charts

9.5 Correctly explain the operation ofengine thermostats and state Why enginesmust be operated near the permissable/imits.

COORS

TIMMINAL PERFORMANCEOBJECTIVE NO._ 9.0 con_

LIELJINTERMEDIATE

PERFORMANCE OBJECTIVES

9.7

The student given a shop la 9.6oratory engine or customerengine will perform the re-quired service operations todrain, fill, flush with sys-tem cleaner, drain and flushwith water and fill systemwith anti-freeze or coolant.Using shop manuals, necess-ary tools, and materials ad-just anti-freeze protectionfor-20°F.

The student given a shop laoratory engine or a customerengine will perform the re-quired service operations toreplace a faulty water pump.Using manufactirers shopuals, necessary tools andterials. All pump gasketjoints must not leak, pumpseal must not leak and allhose connections and drivebelts in good condition andproperly tightened. Testsystem at operating tempera-ture and maximum R.P.M.

ITMION KEASURES

Service cooling system as follows:Drain fill, flush with cleaner, drain,flush with water and fill systemwith anti-freeze or coolant. Adjustanti-freeze protection to-20°F.

Service cooling system as follows:Drain system, replace faulty waterpump, replace all gaskets, faultyhose and drive belts. Fill system andtest for leaks at engine operating temp-erature and maximum engine R.P.M.

COURSE DIESEL iiaii NICS (RNSIC)

=IRINA"- PERFORMANCEOBJECTIVE NO 1 0 .1.. 0

_ Fuel InicctionSiystffiins

completion of this unit on fuel injection systems 90% of the students willebmonstrateugh 80% correct responses to a criterian test, objective knowledge of fuel injection

systems. The student will demonstrate his ability to perform required service operationson components during laboratory assignments. Using manufacturers service manuals, tools,parts, and materials. Clearance measurements must be ±.002 and no abnormal times used.

TATEPERPOMANCE OJECTIVES

10.0

10.1 Given a list of five functio 10.1the fuel injection systemmust perform the student wildemonstrate his knowledge offuel injections systems or-ally or in writing by explaing eath function with 80%accuracy.

10.2 Given an illustration of atypical fuel injection sys-tem the student will demon-strate his understanding ofthe fuel system by tracingthe flow of fuel and explaining the function of the var-ious components with 80% acc-uracy.

10:2

10.3 The student will demonstrate 10.3his knowledge of fuel systemdesign variations by listingfive fuel injection designtypes with 80% accuracy.

10.4 Given an illustration of,a 10.4typical caM-operated sprayvalve and a self-actuatedspray valve, the student wilstate the two functions per-formed by injector spray val-ves and identify the variouscomponents of each type ass-embly with 80% accuracy.

IT ION

Test Attached.

Correctly explain thefive functions the fue'must perform:A. Meter the fuelB. Time the fuelC. Control rate of injectionD. Atomize the fuelE. Distribute the fuel

Correctly trace the flow of fueland explain the function of systemcomponents in a typical fuel systemon the illustration assigned you.

List five fuel injection design typescorrectly.

Correctly state the two functionsperformed by fuel spray valves andidentify the various components ofboth cam-operated and self-operatedsprayvalves, on the illustration assigned you.

4 0

PERFORMANCEI 10.0 (lamed)

PIESEL MANICS BASIC

0.6

107

TATEORMACE OBJECTIVES

Using wall charts and cutawa 10.5asseMbly of a unit injector'the student will demonstraterills knowledge of this type'injector by stating how thequantity and timing of fuelis accomplished and identiAlm, various components of theassembly with 80% accuracy.

Using wall charts and cutaway 10.6assemblies of a Cummins PTfuel pump and unit injector.The student will demonstratehis knowledge of the PT in-jection system by stating or-ally or in writing the func-tion of the units and identi-fy the various components ofthe assembly with 80% acc-uracy.

Given an illustration of the 10.7four basic design variationsof fuel injections systems

suTply pumps, the studentwill demonstrate his knowled-ge of each type orally or inwriting by correctly identiing each type and stating the

rating principle of eache with 80% accuracy.

The student given a shop lab- 10.8oratory or customer enginewill remove, disassemble,'Clean inspect for wear nsCh -fuel injection oxlip andjection nozzle. Using fuel

injection pump maintenancenecessary tools and

mmterials. Reassemble pump_run_punp on test stand and

1.ibrate pump units, disass-eclean and reassemble

`. 8

Fuel In ection S stem

Correctly state how fuel quantityand timing is accomplished in unitinjector type design and correctlyidentify the various components.

Correctly state the function ofCumnins PT Pump and unit injector andcorrectly identify the various componentsof the assemblies.

Correctly identify the four basicdesign variations of fuel injectionsystem supply pumps and correctlystate the operating principle of eachtype on the assignment.

Remove, clean, disassemble, inspect, andreassemble Bosch fuel injection pumpandnozzle,. Time and reinstall pump andinjection nozzle or. engine. Test runengine-pump must be calibrated to 3cc perimaR.P.m. and deliver 1600 Ps: with no leaks.Injection nozzle nust hold 1600 Ps: with noleaks.

41

PERFORMANCEOB.JECTXVE NO 1 0 . 0 one d)

DIESEL MECHANICS (BASIC)

Fuel In- ction s e

con.)

INTERNED TATEPERPORMAIICE 0 T IVES

injection nozzle.Time and asseMble.pump:and nozzle on engine.:lest run engine, pumpUnits must be calibratefa- Zcc per 1000 RPM witno leaks at 1600.PS:fuel injector must hold1600 PS: with no leaks.

The student given a shoplaboratory or customerengine will remove, dis-assemble, clean, inspectfOr wear a General Motorunit injector., Usingfuel injection mainten-ance manual, necessarytcols and materials.Reassemble G.M. unit in-jector, test run unitinjector in calibrationstand and check injectorfor, rack freeness,Aplunger binding, fuelAelivery, pressure hold--ing, spray pattern and.Valve opening pressure.-Calibration must be wit_Jil..3cc of rated delivery-for 1000 strokes, havert.eleaks and spray valvemUst'hold-600 P.5.1. In-tall dnjector in engineme engine injector us-

ing-injector. highthgOage and set valve'Clearance to .012 cold.-_Tet-run,engine to max-iMum .RPM after repairs.

0.9

The:student given a shop 010

CRITERION MEASURES

Remove, clean, disassemble, inspectand reassemble G.M. unit injector.Test injector in calibration standfor capacity, rack freeness, plungerbinding, spray pattern, pressure hold-ing and spray valve opening pres.sure.Capacity calibration must be within3cc for 1000 strokes and injectorspray valve must hold 600 P.S.1. withno leaks.

Remove, clean and replace engine

4 2

amsE DIESEL MEcHANICS_ (BA

17RNKTNAL PERFORMANCEBJECTIVE NO. 10.0 (c Id)

INTEKMEDIATE-PERFOBNANCE OBJECTIVES

,laboratory or customer 10.1C*igine will perform the:r:equired service opera-tions to remove, cleanan4 replace the fuel o..Strainer and filter the*10Ments. U_Orig shop-ranuals, 'necessary tool4nd materials. Reassem-ble'strainer and filter--elements and test enengine. Filters must 13(-able to show no evidenceof leaks at maximum eng-ine RPM.

1 The Student given a shoplaboratory or.customerengine will perform therequired service opera-tions to remove, clean,'inspect for wear a fueloil supply pump. Usingengine shop manuals, neces_sary tools and mater-ials. Reassemble andtest pump on engine,pump must deliver 50 PS1with no leaks.

11

Icy

'ectionS stern

amummmunmsfilter and strainer elements.

Reassemble filter and test on engine.Filter must show no'evidence of leaksat maximum engine RPM.

Remove, disassemble, clean, inspect,for wear fuel oil supply pump._ Re-assemble and test on engine. Pumpmust deliver 50 P.S.1. with no leaks.

4 3

11WOMWUMEDENO. 11.0


Burning the Fuel

OpoilLcompletion of this unit on burning the fuel 90% of the students-demonstrate through 80% correct responses to a criterion test,

ectfive knowledge of burning the fuel. The student will demonstrate'.dhility to perform required service operations on components during

A oratory assignments, using manufacturers service manuals, tool.s,"ts: and materials. Clearance measurements must be .002 and no ab-

LI-normal times used.

INTIMISDIATEO. PERFOMANCE 0_ ECTIV

11.0

I The student will demon-Strate his knowledge ofdiesel combustion pro-tess orally or in writ-ing by explaining thefollowing factors:1. Tine atomizationZ. High temperature

for_prompt ignitions,High relative velo-city between fueland air particlesGood mixing of fueland air particlesthat good combustiondepends upon with80% accuracy.

11 2 The student will demon- 11.2Strate his knowledge ofthe solid-injection piin-Ople Orally or in writ-ing- by explaining the'*Wo:Tequirements:1.-:AtoMization

Penetration, essen--tial-to burning thefUel efficently with80% accuracy.

.! Using wall charts, cutaway .engine assembly andPistOris of.various crowndesigns the student will

11.3

CRITERION MEASURES

Test attached.

Correctly explain the four factors onwhich good diesel combustion depends.

Correctly explain how atomization andpenetration effect the efficiency ofburning the fuel.-

Correctly explain the factors of singlecombustion space and air motion thatare related to open combustion chamber.

4 4

-

COME -DIESE

PERFORMANCECTIVE NO . 1 I . 0 (cont d)

11.4

TRORMANCE OBJECTIVES

_CHANICS-BAS C

,bemonstrate his know-ledge of open combustiopchambers by explainingthe factors of singlespace and air motionwith 80% accuracy.

Given an illustrationfour special design co7bustion chambers thestudent will identifyeach type design, andexplain orally or inwriting why enginesoperating on wide speedranges use combustionchambers of special de-sign, with 80% accuracy.

The student given ashop laboratory enginewill perform the re-quired service operationto remove a precombus-tion chamber cup and-imspett-for -cracks andexcessive nozzle wear,using manufacturer'sshop manuals, necessarytools and materials.Useable chamber mustshow no evidence ofcracks and-nozzle open-ing show no more than.025 wear, reinstalland test engine at max-imum R.P.M. Cup mustshow no evidence ofleaks at injector area.

NO

11.4

___Burning_The Fuel_

CRITERION WEASURES

Correctly identify illustration of fourspecial-design combustion chambers andexplain why engines operating on widespeed ranges use these chambers.

Remove, inspect and replace injectorprecombustion cup. Cup must have nocracks and wear must not exceed .025at nozzle. Cup must show no evidenceof leaks at injector area at maximumR.P.M.

COURSE DIESEL MECFLANICS - BASI

GOVERN NG

pqn,completion of this unit on engine governing 90% of the students willeilicintrate through 80% correct responses to a criterion test, objective

knoWledge of engine governing. The student will demonstrate his abilitytospreform required service operations on components during laboratorygs.s,ignments, using manufacturers service manuals, tools, parts and materials .

iarance measurements must be .002 and no abnormal times used.

EDIATEOB.MCE ORJECTINES CRITERION

Thestudent will demon-Strate his knowledge ofa 'engine governor. oral-y'or -in writing by ex-

plaining what an engine-governor does, with 89%azcuracy.

-Usingwall charts andcutaway engine assem--1,lies the_ student willmorally or in writing de-iTOnstrate his knowledge'of_.hew the_governor:con-trols engine speed, with80%-accuracy.

Given an.illustration ofs'mechanical engine gov-ernor the student willdemonStrate his know-ledgeof mechanical gov-ernorby identifyingthe COmponents and-stat-inghowthe-regulatinglarce:js transmitted tothe engine, with 80%accuracy.

12.0

12.1

12.2

12.3

4 6

Test attached

Correctly explain what an engine governordoes.

Correctly explain how the governor controls'engine speed.

Correctly identify the coponents in amechanical governor and state how theregulating force is transmitted to the--engine.

DIESEL MECHAINUGS-BASIC

TATEE OBJECTIVES

13Verners by identifying6componentsand s t at -

ow the regulatingoyce is transmitted to6 etrgine, with 80% ac-`f

Given a list of sevenovernor modificationshe student will demon-trate his knowledge ofgovernor modificationsiby stating orally or inriting the function ofeach type applicationith,80% accuracy.

1. Isochronous governorPermanent speed droopgovernorVariable speed droopgovernor

4. Two speed mechanicalgovernorOverspeed governorand tripsPressure regulatinggovernorLoad-limiting gover-nor

Governing

TERION ,

he student given a shopabbratory or customer

remove, dis-ssemble, clean, inspectr,!:.Wear a two speed meAp.ical governor. Usin,AUfacturers shop manuale4iSary tbols and ma--p4qLs. Reassemble gov-ii-pri install on engine,-it run engine and set

=and high speed ad-

12-5 Correctir identifyythe'-following sevengovernor modification's br stating the'function of each type application:

a. lsochronous governorb. Permanent speed droop governorc. Variable speed droop governord. Two speed mechanical governore. Oyerspeed governor and tripsf-:-Pressure regulating governorg. Load-limiting governor

6 Preform service operations on a twospeed mecftanical governor as followsRemove, clean, disassemble-, inspectfor wear. Reassemble, installed engineand test run engine. Set low speedat 450 RPM and high sOeed at 2100 RPMWith 10 RPM tolerance.

4 4


P MANCE7icnvE No 12-.0 (coned) Governing

TIVES

ustments as follows:ow speed: 450 RPMigh speed: 2100 RPM with10 RPM tolerance

The student given a shop 12.7laboratory engine or cus-tomer engine will remove,disassemble, clean, in-spect for wear a model:SG hydraulic governor.Using manufacturers shopmanual, necessary toolsand materials, reassemblegovernor, install on en-gine, test run engineand set low and high speedadjustments as follows:Low speed: 450 RPMHigh speed: 2100 RPM with;' 10 RPM tolerance.

48

IT(ION KEA_ S

Preform service operations on a. modl;SG hydraulic as- fella:Kay Remove, clean$,_disassembl'e, insvect.lortfear.' Reassemble,install on entine and test run engine.Set low speed at 450 RPM; high speed at2100 RPM with 4- 10 RPM tolerance.