- basic vehicle

ELECTRICAL AND MECHANICAL M 6 1 W EERl W6 REWLATIONS

RESTRICTED

- l NTRODUCT l ON

WHEELED V E H I C L E S

-2

1. This regulation covers the vehicle i n i t s basic role of passenger or cargo car ry ing and i n i ts F.F.W. role. I n the basic role, the vehicle i s capable of accomoda.ti ing three passengers and driver, or the driver and a 5 cwt load. It is required also t o tow a laden 1/2 ton, 2-wheeled cargo. t r a i l e r or towed equipment and, with reduced

- perfomance, Field Artillery weapons of the 25 pr and battalion A t k types. The primary duty of the F.F.W. vehicle is in connection with wireless telegraphy. The basic vehicle i s readily converted t o other roles when f i t t e d with additional e q u i p - ment .

GENERAL DESCRIPTION OF VEHICLE

2. The chassis frame is of crucif orm design and is formed with two box-section side- - members ri&dly cross-braced and strengthened by welding t o the floor, front wheel valances, dash panel and battery compartment S, the complete structure being fabricated from skeet steel pressings. A support fo r a machine gun mounting pintle i s welded into the scutt le i n front of the front passenger's seat.

3. The open type body, which i s bolted t o the chassis f rame and floor assembly, i s 4- of pressed s tee l construction and includes the rear wheel arches.

4, The windscreen can-be folded f l a t on to the bonnet or removed completely, when - necessary.

5. Two folding seats are provided for the driver and the front passenger, while a - folding bench type seat and a folding three-piece back-rest are prwided fo r the two rear passengers. Each front seat, when tipped forward, gives access t o a compartment

7

underneath. The rear seat can be swung over t o form a platform for load-carrying, while each section of the back-rest can be used i n a s imi la r manner t o support li@t equipment.

- 6. Provision i s made for carrying the spare wheel on top of the one-piece bonnet as an alternative t o the normal position a t the rear of the vehicle t o meet the require- mefits of some special role vehicles.

7-

7. A f u l l width front bumper and two small rear bumpers are f i t ted.

7 8. Weather protection i s prwided by a waterproof hood. Early cargo vehicles are also provided with side screens.

- 9. The fuel tarik i s located a t the rear of the vehicle.

- 10. Power is sqp l i ed by a &-cylinder, water-cooled B40 engine which i s of u n i t construction with the clutch and gearbox.

- 11. 'A gi l led tube radiator i s provided together with a 10-bladed fan for cooling gurposes. The cooling system i s pressurized t o 10 l b per sq in.

-- 12. The power is transmitted through a 10 in. Borg and Beck, single dry plate clutch to a 5-speed a l l synchromesh gearbox devoid of reverse gear.

13. The drive from the gearbox i s transmitted by means of an open Hardy-Spicer - propeller shaf't to a transfer box, integral with the rear axle. The transfer box incorporates the reverse gear and also makes provision fo r a power take-off when it is

- required t o f i t a winch.

Issue 1, 20 Jun 55 Page 7 -


D 572 RESTRICTED ELECTR I CAL AN D MECH AN l CAL 7

ENQlNEERlNQ REOULATIONS

14, The drive from the transfer box t o the rear wheel hubs i s taken through hypoid 7

bevel gears, a normal bevel type differential and fully-floating half-shafts, each articulated by two t racta type constant velocity universal joints which are to ta l ly enclosed i n spherical housings. The axle is resi l iently mounted i n a cradle. 7

15. The front axle i s similar t o the rear axle except for the provision for steering and that a sliding dog clutch replaces the transfer box. The drive from the rear t o 7

the front d e is taken through an open Hardy- Spicer propeller shaft.

7 16. The suspension is of the fu l ly independent type employing an upper and a lower pair of transverse wishbone arms i n conjunction with a longitudinal torsion bar a t each wheel station.

-7 .

l 7. A telescopic double-acting shock absorber and a large conical rubber .buff er, which gives an increasing ra te of compression under bump conditions, are provided at each Wheel stat ion for the purposes of' damping and act as secondary suspension. The shock absorber also controls the rebound i n conjunction with a small rubber buffer attached to the cradle.

18. Girling hydraulic brakes are f i t ted. The front brakes are of the two leading shoe type with t w o shoe expanders (wheel cylinders) while the rear brakes are of the leading and t ra i l ing shoe type with a single floating shoe expander. The footbrake operates on all four wheels and the handbrake operates mechanically on the rear wheels mly.

19. Divided-disc road wheels with cross-country tyres are f i t ted.

20. Steering is controlled through a helical rack and pinion type steering box.

21. The electr ical system is 24-volt, two 12-volt vehicle batteries being housed under the front passenger's seat. In F.F.W. vehicles, two additional 12-volt batteries for radio duties are housed under the driver's seat, and i n order t o cater fo r the extra load, a special 2-speed generator i s f i t ted . The batteries i n F.F.W. vehicles are of a different type t o those i n cargo vehicles.

Page 8 Issue 1 , 20 Jun 55

ELECTRI C M M D MECHMI CAL E l61 W EERlN6 REaULATl OWS

DIMEWSIOWS - See Fig 5

RESTRICTED

TECHN l CAL DATA


Note: Dimensions shown associated with 6.50 tyres are applicable to early cargo 'vehicles only.

WE I QHTS (Cargo vehicles) Kerb

(with gasoline, oi l , coolant, tool k i t and spare wheel but not including driver) ... 0.. ... Front ... ... ... ... ... ... ... Rear ... ... ... ... Total ... ....... 0 . 0

Laden (gross) ... .... ... ... ... ... Front ... ... . .. ... ... ... Rear ... ... ... ... . . . ... Total' ... ... 0.. ... 0 . .

S H I P P I N 0 TONNAGE (based on knock-down height of 4 f t 0 in.) 6 tons 6 cu. f t .

BRtDGE C L A S S I F I C A T I O N 3

FORD1 NO DEPTH ... ... ... Unprepared ... ... 2 f t 6 in. 10.762 m] Prepared ... ... ... ... ... 6 f t 6 in. 1.981 m

PERFORMANCE ... Maximum speed on road, solo ... lbximm speed on road with trailer ... Average maximum safe speed on road, solo

i Average,&um safe speed, cross country, ... a.. ... solo ... .. . Maximum safe speed in reverse ... ...

- Maximum gradient climbable (fully laden) Range of operation on mad a t 30 m.p.h. Fuel consumption on road at 30 m.p.h. ...

,- Approach angle - front ... ... ... ... Departure angle - rear ... .. Side overturn angle ... ... ... -

TURWlWQ C I R C L E ... ... ... Left lock . ,. - ... ... ... Right lock ... - NETT POWER/QROSS WE1 6 H T R A T I O

MAXIMUM T R A C T I V E EFFORT ... ... - 5th speed loo0 efficiency I st speed 100° efficiency ... ...

20 m.p.h. (32.2 h * ~ - h * ) 30 m.p.h. (48.3 h.p.h.) 1 : 2.5 (22 deg approx)

-440 miles 22 m.p.g. 45 deg 35 deg 45 deg

- 8 .

35 f t 0 in. '.i.(10.668 m) 35 f t 0 in. (10.668 m)

34.5 b.h.p. per ton

213 l b per ton 1,335 lb per ton

Issue 1 , 20 Jun 55 Page 9 l


D 572

RESTRICTED

CAPACI T l ES Fuel ... ... ... C . e ' ... Coolant ... ... ... Engine sump ... ... ... + ... Air cleaner ... ... Gearbox '.

0 . . 0 . . .a. i

Rear 'axle ... . .. ... Front axle ... ... ... ... Hubs (each) ... ... ... Tracta joint housing (each) ... Steering box ... ... Brake fluid supply tank (approx) Shock absorbers - Girling type (each)

EUOlWE Type ... ... ... . - .

... Number of cylinders ... MEudmum gross b.h.p. Maxiwrm b.h.p. a t clutch Maximum gross torque ...

$ . M a x i m u m torque at clutch Bore ... ... ... Stroke ... ... ... Capacity • .. ... Compression ra t io ... Valve tappet clearances -

Inlet ... ...

... *.. ... ... ... . W . ... ... ...

cold ... Exhaust ... ... .'. . ...

Distributor ... Q . e ... ...

Automatic ahance ... ... ... Speed limiter ... *.. ... Ignition timing .. ... ... ...

ELECTRI C& AND MECHAN l CA1 MGIIEERJI6 REGULATIONS

Imperi a L U 20 gal 3+ 9" If gal 22 pints 8 pints

pints 4 pints ' pint

pint g pint 2 pint

U . S . A . ( Litres

24-80 g& 3.9 g d 2.1 gal 3.0 pints 9.6 pints 5.4 pints 4.8 pint S

0.6 pint 0.6 pint 0.9 pint 0.6 pint

-, L.,

B40, No. I , Mk 2A/4 (Early cargo vehicles)

B40, No.1, Mk 5A a ate cargo and all 1

F. B. W. vehicles) Four i n l ine 78 :rt 3,750 repem. 69 a t 3,750 r.p.m. C - 136 l b f t a t 2,150 r.p.m. 133 l b f t a t 2,150 r.p.m. p ( , , , 3.5 in. 88.9 mm) 7 t],.3 Y - L -4

4.5 in. [114.3 mn) 3'8 \ I f a \ * . 2

L 4 173.18 cue in. (2,838 cc.) flaw , , i ,f izll ci,, 6.4 : l

' 2 - \' .*'%..< .c

U".

0.010 in. (0.254 rmn) - ,

Notwithstanding engine data plate instructions

0.015 in. (0.381 mm) "\

4 cyl. No.1, Mk l - W141530 or No.1, Mk 2 - W141534 -

Point gap O.QI0-0.012 in. (0.254-0.305 mm) or

tr

4 cyl. Noel, Mk 2/1 - W141539 -- Point gap 0,049-0.021 in.

(0.483-0.533 mm) 12-14 deg 3,650-3,850 repem. T.D. C. except when a No. l , Mk 2

distributor with unmodified - contact breaker i s f i t ted , i n which case the timing i s 4 deg A.T.D. C.

Note: A No.1, Hk 2 distrlbutor with a modified contact breaker is indicated when No.? on the modification Record Plate has been cancelled. Otherwise the I - contact breaker is unmodified.

* .

Page 10 Issue 1 , 20 Jun 55 \ ./

rC- ELECTRICAL AND MECHANICAL RESTRICTED WHEELED V E H I C L E S

EM61 N EERl N 6 REWLATl OHS M

- -2 E N G I N E - Contd. fl05La ... Ignition coi l ... ... ... ~0.1, Mk l - FV141528 or

No.1, Mk 2 - FVI41532 or - No.1, Mk 2/1 - FV175891 ... Firing order ... ... ... 1 - 3 - 4 - 2 ... Sparking plug No. l , Mk l ... - 14 mm ~~6/m4/3343 ... ... ... Gap ... ... 0.015 in. (0.381 mm)

Loss of efficiency at altitudes of: ... 5,000 f t ... 0 . 0 * * o 7

20.08 10,000 f t ... ... ... ... 37.28 %

7 ENGl N E L U B R I C A T I N G SYSTEM ... Type of system ... ... ...

i ... ... O i l pump ... ... ... - O i l pressure at which warning ... o = . ... l ight operates ... ... .

O i l pressure (engine hot) ... Normal running ....... . . l

... O i l f i l t e r ' ... ... ... Pressure rel ief valve ... ... ...

COOLING SYSTEM Radiator ... ... ... ... Fan ... ... ... . . . Circulation ... . . . ... ... Cooling control ... ... ... Location of drain taps ...

\ FUEL SYSTEM ... fie1 Pump 0 . .

Fuel pump pressure ... Carburetter ... ... ... Choke ... ...

Main jet ... ... ... Air cleaner ... Location of fuel f i l t e r s

- CLUTCH

m e 0 . 0 m ? . 0 . .

7 Clutch pedal. f ree movement Adjustment provided ...

. , GEARBOX - . ... T Y P ~ 0 . .

. C . -

Wet sump Gear type 3-1 2 l b per sq in.

(0.21 1-0.844 kg per sq cm)

35 l b per sq in. (2.461 k g per sq cm)

4 l b per sq in.. (0,281 kg per sq a)

By-pass or f u l l fluw type Spring-loaded, two-stage

Gilled tube, Morris type "Bn f ive row X 8 G.P.I.

l 0 blade - 16.5 in. dia. Friction clutch positive drive

Thermo-siphon, pump assisted Thermostat-bellows type with by-pass Right hand of cylinder block, bottom

l e f t side of radiator

A.C. type U - mechanical Sta t ic pressure: l&2$ l b per sq in.

(0.1 05-0.1 76 kg per sq cm) - Solex - 4OTRMIEO 31 mm 1 45 O i l bath type 135 c.f .m.

m 57578 Iimediately behind drivers seat,

carburetter banjo union, fuel pump

10 in. single dry plate l 0 A6 3 - in. (19-25.4 m) Adjusting rod, threaded L and R.H.9

and linked to clutch pedal lever

5-speed, all synchromesh, no reverse

- Issue l , 20 Jun 55 Page l 1


D 572

RESTRICTED ELECTR I CAL AN D MECHAN l CAl. M 6 1 H E E R I N 6 REOULATIONS

G E A R B O X R A T I O S ... ... l st a.. a.. ... 2nd . ... ... ... 3rd ..a . . ... 4th - a * m e * • • m a - . ... ... 5th a * .

TRANSFER G E A R B O X (incorporated i n rear axle) ...... ... Type ... ... ... One forward and one reverse speed with spiral gears and sliding spur gears

T R A N S F E R G E A R B O X R A T I O S ... Forward ... ... ... Reverse ... ... A X L E R A T I O

O V E R A L L R A T I O S (engine t o wheels) ... l st . . a a;. 0..

2nd .... . = - ... .*. ... 3rd ... ... a.. S.. ... 4th * m *

5th a. . a.. - . a

M A X I M U M S P E E D S (for above ratios) 1 st a . . a . . a.. * - D 11.1 m.p.h. ( l 7.9 h.p.h-) 'with

6.50 tyres l1 -7 m.p.h. (18.8 kmop.h.) with

7.50 tyres 17.1 m.p.h. (27.5 h.p.h-) with

6.50 tyres 18.0 m.p.h. (29.0 lan.p.h.) with

7.50 tyres 25.6 m.p.h. (41.2 km.p.h.) with

6.50 tyres 27.0 m.p.h. (43.5 lan.p.h.) with

7.50 tyres 39.7 m.p.h. (63.9 hn.p.h~) with

6.50 tyres 41 .9 m.p.h. (67.4 h.p.h.) with

7.50 tyres 60.7 m.p.h. (97.7 km.p.h.) with

6.50 tyres 64.0 m;p.h. (103.0 km.p.h-) with

7.50 tyres

P R O P E L L E R S H A F T S (Gearbox t o transfer box) ...... Type .-• ... ... ... Hardy-Spicer tubular shaft with two

needle rol ler universal joints 3 f t @in. (0.924m)

l Nominal overall length . . ... ... ( ~ r a n a f e r box t o front axle)

a.. a.. ... Type ... ... Hardy-Spicer tubular shaft with two needle ro l le r universal joints (4

4 f t in. (1.429 m) i %d

Issue l , 20 Jun 55 ";

Nminal overall length ... ... ... Page l2

RESTRICTED WHEELED V E H I C L E S ELECTRI CAL AND MEWAN l CA1 M B l NEERl NB REOULATIONS

7 D 572

TYRES 7 Size

Ear ly cargo vehicles . . . ... . . 6.50 X 16 Late cargo and all F.F.W. vehicles . . . 7.50 X 16 7

TYRE PRESSURES Road use

6.50 tyres - front 6.50 tyres - rear 7.50 tyres - front 7.50 tyres - rear

Cross-country use 6.50 tyres - front 6.50 tyres - rear 7.50 tyres - front 7.50 tyres - rear

E L E C T R I C A L E Q U I P M E N T Type of system . ... Starter ?., . . .

28 lb per sq in. l . 969 kg per sq cm 28 ~b per sq in. 1.969 kg per sq 24 lb per sq in. 1.687 kg per sq 20 ~b per sq in. 1.406 kg per sq

20 ~b per sq in. 1 .W6 kg per sq 20 lb per sq in. 1.406 kg per sq 15 lb per sq in. 1.055 kg per sq 15 lb per sq in. 1 .055 kg per sq l

nominal, negative earth return No.1, Mk 2 - FV1415&6 or NO. l, Mk 2/1 - FVI 57939

Page 14

LmP

Head

Side

Tail

Number plate lamp

Instrume-rt panel

Ignition warning

Oil pressure warning

7 Issue l , 20 dun 55

Volts

26

26

26

26

26

26

26

Uatts

50/50

6

6

6

6

6

6

Type

British pre- focus D.C.

S.C.C.

S.C.C.

S.C.C.

S.C.C.

S. C. C.

SbC.C.

ter-serulce art No.

954508

ELECTRICAL U I D MEQUIICAL UBIWEERINB REWLATIONS

A X L E S (Front and rear) ... Type ... ...

SUSPENSION (Front and rear)


p u 2 FcsW

Wheel deflection - Static to bump a * . 0.0 a*.

Static to rebound ... ... ... Wheel scrub

Static to maximum bump ... ... ... Static t o maximum rebound ... Shock absorbers ... Type ... ... ..a

Size

STEER I N Q Type ... ... ... ... Wheel diameter ... ... ... Number of turns - lock t o lock Front wheel toe-in ... ... ... Cast or angle ... ... Wheel caniber (normal)-

Front ... ... .. . Rear ... ... ...

Wheel off set a t road level ... -- BRAKES

Type-front ... ....... ... ... - rear ... ... ...

... Diameter of shoes ... ... Width of shoes ... ... ... ... Braking area ... ... ... ... Brake pedal free movement ...

WHEELS Type

Early cargo vehicles ... ... Late cargo and all F.F.W. vehicles

maid bevel drive to fully-floating half-shaf ts each a r t i d a t e d with two 80 mn tracta-type constant velocity universal joints

N l y independent with traverse wishbone arms and longitudinal torsion bars

117.5 mn lc5l8 3 in. in* [ 76.2

Approx 29/32 in. 1.1/4 in. (31.7

Telescopic, double-acting, hydraulic; G i r l % CDA~/'NF or Armstrong AT11 1.1/2 in. t38.1 mm] Girling I in. 34.9 mm Armstrong I j

Helical rack and pinion I 7 in. (43.18 an) 2.7 in. 311 6 ifi. 1 .1/2 deg gositlve

1.1/2 deg positive Zero deg Approx 1.1/16 in. (27 mn)

Girling hydraulic two-leading shoe - 1 =/s

G i r l i n g hydraulic leading and trail- 1 ing shoe with mechanical handbrake HNS/S/H

10 in. (25.4 a) 1.3/4 in. (44.4 -)

I

33 sq in. (21 2.9 sq m) per wheel 1/4 - 3/4 in. (6.4-19?0 mn)

4.5m x 16, W.D., divided 5.50F x 16, W.D., divided

Issue 1, 20 Jun 55 Page 19

- I j

Cargo vehicles Batter ies . . .

Numberof'f' ... Volt age . .. Capacity ...

Generat or . .. Generator panel ...

RESTRICTED V E H I C L E S I l

m i

€0-

Generator panel No.1, Generator mahi c i rcu i t Mk 2 / l

Distribution box No. l , Inspection lamp sockets, Mk 1 lamps, horn, t r a i l e r

socket and wireless feed

CIRCUIT - ( T h d magnetic type)

Locat ton

Generat o r panel No.1, Mk l

OR -

Generat o r panel No. l , -

Location Con t rd l 1 ing Capac i t y l I

I Engine e l ec t r i ca l equip- I I OA ment - excluding igni t ion

ControZling

Generator main circuit

Generator waxwing lamp circuit

Generat or warning lamp circuit W---

F.F.W. vehicles Batteries ... . . . ... ...

No. m . . m 0 . . . m . . .* Volt age ..* ... . . . ... Capacity ... . m . ... . ..

Generator . .. ... ... . m .

Generator panel ... . . . ... . . .

Capac i ty

20A

1 OA

1 OA

No.?, Mk 2/1 - m175873 2 f o r vehicle, 2 fo r radio l 2-v W Ah No.2, Mk 1 - FVl75843 or No.2, Mk 2 - m175866 N0.2, Mk 1 - FV175848 or No.2, Mk 2/1 - FT1 75871

Material and S.N.G. -

No.33 S.W.G. t h e d copper wire

Ro.36 S.W.G. tinned copper wire

No.34 S.W.G. tinned copper wire

Issw l, 20 Jwr 55 5

Page l5 1 i

WHEELED VEHICLES

D 572 ELECTRICAL All0 MECnAWlCAL #BINEEUINS REBULATl ON S

I Locat ion I control2 Lng Material and S. U. G.

Generat or panel N 0. 2, lac l

&.erator panel No. 2, *2/1


Generat or warning lanq circuit


Generat or warnin;: lamp circuit

5OA (10 sec) fusing

No.3 S.W.G. tinned copper wire

NO.$ S.W.G. tinned copper wire

Str ip type

N0.30 S.W.G. tinned copper %6re

CIRCLTT l3REAIm (THERbm l,4AGmTIC m) Location - Distribution box Nc.1, hlk 1 - see mder "Cargo v&.icles"

CHASSI S FRAME Tne &.;assis f r m e is of' cruciform clesign and is fonned with two box-section

side members rigidly cross-braced arid strengthened by welding t o the f loos, front wheel valances, dash panel aad battery compartmer~t S.

LUBRICANTS - FOR NQRMAL CONDITIONS

Page

Points where used

Engine sump Distributor 4 cyl No.1, bfks l =d 2 - Shzft ( c m

spindle), contact breaker lever pivot md autmatic advance med~ar~ism

Distributor 4 cyl No. l, Mk 2/1 - Shaft (cam spindle) lubricating f e l t , cam f e l t and contact breaker lever pivot

Air cleaner Gearbox C l u t c h withdrawal bearing Contrcjl linkage - accelerstor, c1:ltc;. aEd hadbrake

Froct .wd rear axles Tracta joint ho~cings Roed wheel hubs

Frorit suspenoi on wishbone a r m pivot pin:, - shart, i nc l~~d ing swivel pins (4 n i ~ . l e s )

Rear suspension t,ishbone m pivot pins - short (4 n i p ~ l e s )

Front and rear ai\spensior. \;is~~F,or.c :inn pivot pins - 10%

St ec~~ane; box S t e e ~ h g gear ball joints ( 2 n i @es) Pro e l l e r sh t universal and s?ldine joints

f6 nimle$ Issue l * 20 Jun 55

ll.1.

O i l OMD-110

O i l OF9-220

O i l 0C-600

18

Designation U. S. A.

O i l engine H D ( w 30)

Lubricart gear universal (Grade 90)

ELECTRI C M AllD MECHAII I C M U 6 l l E E R l W 6 REBULATlOlS

RESTRICTED -D V E H I C L E S

F-

HYDRAULIC F L U I D S - FOR NORMAZI TEMPERATUHE CONDITIONS

Points where used

Timingcasefording seal (l nipple Water pump fording seal (1 nipple

(4 nipples) Front and rear axle and gearbox fording seals

Susperision wishbone m and swivel pin o i l seal covers (pre-packed)

Generator and s tar ter bearings Distributor shaft ba l l bearing Speedometer flexible drive gearbox (pre-packed)

Designation

Issue 1, 20 Jun 55 Page 1P

L

U. K.

Grease S 2 8 0

Grease XG271

U. S. A .

Grease auto- motive and ar t i l l e ry

Points where used Designat ion

U. K. -~-,

U. S . A .

O i l OF-24

O i l OM-l3

.

.---.- - - -

Fluid hydraulic brake

--p - Brake master cylinder supply tank

I

Girling type shock absorbers

J

ELECTRl GAL- .AND MECHAW 1 GAL MBlflEERIIIB REOULAT1OMS RESTR l CTED WJ€&W VEHICLES

rplsrz F czlz

* " " . . - - m - , "

F i g 1 TKree-quarter front view

early cargo vehicle w i t h hood and side screens up

Fig 2 Three-quarter rear view - early cargo vehicle wi th hood and side screens up

Ismt I , m Jrm 55 Pug4 IQ

ELECTRICAL AND MECHANICAL MQIWEERtI0 R E G U L A f l O I S RESTRICTED WHEELED YEH1 CLES

La 2 Z

F i g 3 Threequarter f ront view - open vehicle

F ig 4 Threewarter rear view - hood up v--

Issue z , ao Jtm 55

ELECTR I CAL AN D MECHAN I CAL MGl NEERl NG REGULATIONS

RESTRICTED

l F i g 5 Vehicle dimensions ---r

-- cj

l -

Issue I , ao Jun 55

Documents

- basic vehicle