b section

--- ~--r -------------

LUBRICBTION

Contents

SUBjECT PAR.

Air Cleaner. . . .. . . . . . . . . . . . . . . . . . . . . B-23, B-43

Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 9Brake Master Cylinder. . . . . . . . . . . . . . . . . . . . B-31Choke Control. . . . . . . . . . . . . . . . . . . . . . . . . . .B-27

Clu tch Linkage. . . . . . . . . . . . . . . . . . . . . . . . . . . B- 28Clutch Release Bearing. . . . . . . . . . . . . . . . . . . . B-35Differential:

Conventional.. . . . . . . . . . . . . . . . . . . . . B-l8, BA6Powr-Lok. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-l9

Distributor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-20

Engine Crankcase. . . . . . . . . . . . . . . .B-2, B-7, BAOField and Industrial Use. . . . . . . . . . . . . . . . . . . B-39Flexible Controls. . . . . . . . . . . . . . . . . . . . . . . . . B-2 7Front Axle U-Joint. .., .. . ... .. .. ... .B-ll, BA4Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2lGovernor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-49

Hand Brake Control. . . . . .. .. . . .. .. . ... . . .B-27Heat Control Valve. . . . ... .. .. . ... .. . .B-25

Hydraulic Lift. . . . . . . . . . . . . . . . . . . . . . . . . . .B-50Initial Lu brication. . . . . . .. B-6

8-1. GENERAL

It is highly important that the correct amounts ofthe proper lubricants be used at regular intervals.The specifications given in the charts and detaileddescription of this section should be c10sely fol-lowed. Speciallubricating instructions for field andindustrial use are given as the last part of thissection.

8-2. Engine Oil ClassificationsThe American Petroleum Institute has a systemof c1assifying engine oils according to type of serv-ice. These designations are:ML - Light and favorable service conditions.MM - Moderate to severe service conditions.MS - Most severe service conditions.Common short trip, stop-and-go driving is themost severe and becomes intensified even more incold weather. In contrast, constant-speed drivingon highways is the least severe.Depending upon conditions of operation, eitherMM or MS grade is recommended for Jeep vehic1es.It is also necessary to specify the SAE number inaddition to the above c1assification.

8-3. Lu bricant Base

Sodium base lubricants are used at the factory forinitial fill of the wheel bearings, front axle shaftuniversaljoints, and propeller shaft universaljoints.Because mixing of sodium base and lithium baselubricants results in a thinned-out mixture thatcan bleed through seals, always use sodjum base

SUBjECT PAR.

King Pin Bearings. . . . . . . . . . . . . . . . . . . . . . . . B-l1

Lubrication Fittings. . . . . . . . . . . . . . . . . .B-8, B-41

Dil Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . B-22, B-42Dil Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-4

Power Take-Dff. . . . . . . . . . . . . . . . . . . . . . . . . . B-47

Propeller Shaft U-Joints. . . . . . . . . . . . . . . . . . .B-lORadiator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-32

Shock Absorbers.. . . . . . . . . . . . . . . . . . . . . . . . . B-38

Speedometer Cable. . . . . . . . . . . . . . . . . . . . . . . B-25Spring Shackles and Pivot Bolts. . . . . . . . . . . . B-9Springs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3 7Starting Motor . . . . . . . . . . . . . . . . . . . . . . . B-36Steering Gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12

Throttle Control. . . . . . . . . . . . . . . . . . . . . . . . . . B-27

Transfer Case. . . . . . . . . . . . . . . . . . . . . . . B-l5, BA5Transmission. . . . . . . . . . . . . . . . . . . . . . . . B-l5, BA5

U-Joints, Front Axle .B-ll, B-44U-Joints, Propeller Shaft. . .. . . . . .. .. .. ... .B-lO

Water Pump Bearing. . . . .. .. .. .. . ... .B-35Wheel Bearings. .. . . . . . . . . . . . . . . . . . . . . . . . . B-l3

whee1 bearing and universal joint lubricants on'Jeep' vehic1es. Should oil leaks occur at thesebearings, thoroughly remove the old lubricantbefore new lubricant is added.

8-4. Oil Pressure Gauge or IndicatorGn Models CJ-2A, CJ-3A, and ear1y CJ-3B anoil pressure gauge is mounted on the instrumentpanel. This gauge indicates the oil pressure withinthe engine lubricating system.Dn Mode1s CJ-5, CJ-6, DJ-3A and later productionvehic1es of Model CJ-3B a red telltale lamp, whichoperates when the ignition switch is turned on, islit when there is insufficient oil pressure to properIylubricate the engine. When it goes out, operatingpressure is achieved. In normal operation, the lightis lit when the ignition is first turned on. It goesout after the vehic1e is in motion.Failure of the gauge or indicator to register normaloil pressure may indica te insufficient supply oí oilin the engine crankcase, low or no oil pump pres-sure, or a fault in the gauge or indicator electricalcircuito The engine must be stopped immediatelyto prevent possible damage to engine bearings andthe fault corrected before restarting the engine.

8-5. Engine Lubricating SystemThe engine is pressure lubricated by a gear typeoil pump driven by a spiral gear on the camshaft.Dil is drawn through a floating, screened intake toprevent the recirculation of any sediment or waterthat might accumulate in the oil pan. Typical

Text continued on page 13.

9

B LUBRICATION

LUBRIC8TION SPECIFIC8TIONSMODELS C J -28 BND C J -38

11097

FIG. 14-LU13RICATION CHART-MODr::LS CJ.2A AND '-¡.IA

Not lower than 32°F. [O°C.Iuse SAE 30 or

IOW-30

As low as 10°F. [-12°C.1use SAE 20, 20W,

10W-30, or 10W-20

As low as -10°F. [-23°C.1use SAE 10W,

10W-30. cr 10W.20

Belcw -10°F. (-23°C.1use SAE 5W or

5W.20

'This chart applies for usual road work. For additionallubrication requirements when used for field or industrial work, see Par. B.39.*'Starting motor bearings on Model CJ-3A vehicles after Serial No. 30972 were lubricated at assembly to last between normal rebuilc\- periods.'-'Rear wheels must be removed from Model CJ-2A vehicles before Serial No. 13413 to lubricate wheel bearings.tSodium base lubricants recommenled; do not mix sodium base and lithium base lubricants.

10

QUANTITY I LUBRICANTChart ITEM TO BE ----------No. LUBRICATED FREQUENCY* GRADE

U.S. Imperial Metric TYPESummer I Winter- ---- ----------

1. Chassis Bearin!?s. . . . .. Each 1000 miles [1.600 km.1 As required Chassis Lubricant No. I No. O

2. Engine............... Change each 2000 miles [3.200 km.1 4 qts. 3 Yo qts. 3.785 ltrs. Engine Oil See Note

3. Transmission and(Check each 1000 miles [1.600 km.1

3 Y2 pts. 3 pts. 1.65 ltrs. GL4 SAE 90 SAE 80Transfer Case. . . . . .. Change each 10,000 miles [16.000 km.1

4. Differentials:Front. . . . . . . . . . . . ..

(Check each 1000 miles 11.600 km.]2 Y2pts. 2 pts. 1.181trs. MIL-L-2105B SAE 80 SAE 80

Rear............... Change each 10,000 miles [16.000 km.1 2 % pts. 2!-:; pts. 1.3 Itrs. MIL-L-2105B SAE 80 SAE 80

5. Universal Joints(Check each 1000 miles (1.600 km.1

As required Universal Joint Lubricantt No. 1 No. OFront Axle. . . . . . . .. Change each 12,000 miles [19.200 km.1

6. Steering Gear. . . . . . . .. Check each 1000 miles [1.600 km.1 As required MIL-L-2105B SAE 80 SAE 80

7. Universal JointsPropeller Shaft. . . . .. Each 1000 miles [1.600 km.) As required Universal Joint Lubricantt. No. 1 No. O

8. Distributor:Oiler............... Each 1000 miles [1.600 km.! Several drops

Engine Oil I

Same as engineWick... ........... Each 1000 miles [1.600 km.] One drop Engine Oil Same as enginePivot. ............. Each 1000 miles [1.600 km.1 One drop

Engine Oil I

Same as engineCam.. .. .... ....... Each 1000 miles [1.600 km.1 Sparinly Grease Soft

9. Generator and IStarting Motor"'. . .. Each 1000 miles 11.600 km.! 2-4 drops Engine Oil Same as engine

lO. Front Wheels. . . . . . . . . Disassemble to lubricate each6000 mils [9.600 km.1 As required Wheel Bearing Lubricantt No. 2 No. 2

11. Rear Wheels**. . . . . . . . Sparingly each 1000 miles [1.600 km.1 As required Wheel Bearing Lubricantt No. 2 No. 2

13. Governor. .. . . . . . . . . .. Check each 1000 miles (1.600 km.1 As required Engine Oil Same as engine

14. Power Take-Off. . . . . .. Check each 1000 miles 11.600 km.1 As requircd GL4 SAE 80 SAE 80

15. Universal JointsPower Take.Off. . . .. Extensive use: Repack once ayear.

As required I

Chassis Lubricant No. 1 No. O

Air Cleaner. . . . . . . . . .. Each 2000 miles 13.200 km.! 1 )1 pts. 1 pt. .591 ltrs. Enine Oil Same as engi",,---

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER B

LUBRICATION SPECIFICATIONS

MODELS C J -3B, C J-5 BND C J-6

FIG. lS-LUBRICATION CHART-MODELS CJ-3B. CJ-S. CJ-6

11 096

ITEM TO BELUBRICATED FREQUENCY

1000 miles =1.600 km.

Chassis Bearings . . . . Each 1000 miles

Spnng Shackle Bushings.. .1 {With lube fitting s: Each 1000 miles

SpdngPivotBoltBushings Without lube fittings: No lubrication

Univenal Joints

I

Each 1000 milesPropeller Shaft Check each 1000 milesFront Axle Shaft {Change each 12.000 miles 119.200 Km.)

Steedng Gear Housing. . . .

Rea< Wheel..............

Check each 1000 miles

Sparingly each 1000 miles

Front Wheels. . . .. ...... Di.as.emble to lubdcate each6000 miles 19.600 km.1

3-SpeedTransmission and

I

{Check each 1000 milesTransfer Case Change each 10.000 miles

°4-Speed Tranamission rCheck each 1000 milesTransfer Case. . . . . . . . . . .. tChange each 10,000 miles

Q.lú.

DifTerentialsFront .

1 {Check each 1000 mile.

Rear. .. . . . . . . . . . . . . . . . Change each 10,000 miles

SpeedometerCable. . . . . . .Oi.tributor

Oiler .Wick.................Pivot .Cam..................

DiS8ssemble to lubricate each12,000 miles (19.200 km.)

Each 1000 milesEach 1000 milesEach 1000 milesEach 1000 miles

Air Cleaner.. . . . . . . . . . . . .i

I Generator...............I Engine..................

2 Jóípts.2 y. pta.

pta. 1,2 Itrs.pta. 1,2 Itrs.

MIL-L-2105B'MIL-L-2105B*

22

Aa required Graphite Grea8e

Several dropsOne dropOne drop

2 c. c.

Engine OilEngine OilEngine Oil

Cam Lubricant

Each 2000 miles

1

1 7i pts. 1 pt. 591,4 cm' .

\

Each 1000 miles 2-4 dropa

Change each 2000 milea 4 qts. ** 3 H qta. 3,8 Itrs.Not lo..er than 32"F. (O"C.) Not lower tban lOoF.(-12"C) Aa lo.. as -IO"F. (-23"C.)

use SAE 30 or use SAE 20, 20W. use SAE 10W,IOW-30 IOW-30.or 10W-20 10W-30.or 10W-20

";Por Po Lok differential use only Willys Powr-Lok Differential Oil, Part No. 94557.. Wben al. filten..chan~ed at the .ame time. add one quart lone Itr.1 . . . .

4.St>eed tran.mlulon and transfer case (optional on CJ-5 and CJ-6) requlS'e separate lubrlcatlon of each umt.tSo<llum bu: lubncan.. recommend:d: do not mix sodium base and litbium base lubricants.

Engine Oil

Engioe Oil

SAE 90

SAE 90SAE 90

SAE 80

BAE 80SAE 80

SAE 80SAE 80

SAE 80SAE 80

Light

Same as engineSame as engineSame as cogine

Same as engine

Same as enltioe

Belo.. -lO"F. (-23"C.)use SAE 5W or

5W-20

11

CHARTNO.

--lo

2.

34.

5.

6

7.

8.

QUANTITY

I

LUBRICANT

TYPE GRADEU. S. Imperial Metric

Summer I Winter

Asrequired

I ChassisLubricant

No. 1 No. O

Aa required Chaaaia Lubricant No. 1 No. O

IUniversal Joint

As required Lubr1cantt

Aa requiredUniversal Joint

Lubricantt

Aa required MIL-L-2105B

Aa required Wheel BearingLubricant t

Aa required Wheel BearingLubricant t

6Jóí pts. 5 Jóípts. 3 Itrs. GL4

6% pts. 5% pta. 3,2 Itrs. GL43Jóí pta. 3 pta. 1,7 Itrs. GL4

No. 1 No. O

No. 1 No. O

SAE 80 SAE 80

No. 2 No. 2

No. 2 No. 2

B LUBRICATION

LUBRICBTION SPECIFICBTIONSMODEL DJ-SB "DISPBTCHER"

19

FIG. 16-LUBRICATION CHART-MODEL DJ-3A

10026

ITEM TO BELUBRICATED TYPE

GRADE

Summer I Winter

CHA

.

RT

I

NO.

1.

2.

QUANTITYFREQUENCY

1000 miles ~ 1.600 km.U.S. Imperial Metric

Chassis Bearings. . . . . . . .

Spring Shackle Bushings1

IWith luhe fittings: Eaeh 1000 miksSpring Pivot Bolt Bushings \ Without lube fittings: No lubrication

Each 1000 miles

Check each 1000 miles

Aa required

As required

3. Universal Joints. .........

Steering Gear Housing. . . .4.

5. Rear Wheel Bearings. . . . .

Frcnt Wheel Bearings. . .6.

7. 3-Speed Transmission. . . . . .

8. Differential. . . . . . . . . . . .

9.

10.Remate Control Shift.. .

Hand Brake ControlHandle Cable. . . . . . . . . .

11. Hand "Srake ControlCable Rea,r. . . . . . . . .

12. Generator. . . . . . . . . .

Speedometer Cable. . . .

Distributor:Oiler .i..........Wick....Pivot.. ...Cam :....

Air Cleaner (Oi! bath)....

Generator. . . . . . . . . . . . . . . . . .

Each 1000 miles A. required

Aa required

.1Sparingly eaeh 109.0 milesPisassomble to lubricate each. 10,000 miles

'Check each 1000 miles\Change each 10,000 mile.

As required

A. required

1).-2 pta. 1.\4 pts. O,71trs

. . . 11Check each 1000 miles\ Change each 10,000 mile.

Each 1000 m;:es

2 pts. 1 ~~ pt.. 0,9 ltl s

A. required

Each 10,000 miles As required

Each 10,000 miles

Each J 000 miles

As required

2 to 4 drops

Disassemhle to lubricate each12,000 mile. [19-200 km.1

A. required

Each 1000 milesEach 1000 mile.Each 1000 milc.Each 1000 mile.

Each 2000 mile.

SeV\.'ral dropsOne dropOne dropSparingly

1J4 pt.. 1 pt. 0,6 Itrs.

Each 1000 miles 2 to 4 drops

4qts.** 3).-2 qts. 3.81trs.

As low as -10°F. (-23°C.)use SAE 10W,

10W-30.or 10W-20

Below -10°F. (-23°C.)use SAE 5W or

5W-20

Engine. '.' . . Oo,. . . . . . . . - l. ~hanl!e eaeh 2000 miles

Not lower tha'1 32°F. (O°C.) As low as 1úoF. (-12°C.)use SAE 30 or use SAE 20, 20W,

10W-30 '10W.30,1:>r 10W-20

*For Powr-Lok differential use only WilIya Powr-Lok Differential Oi!. Part No. 94557.**When oil filler i. ehanged at the .ame. time, add one quart fone Itr.j.tSodium base lubricant recommended; do not mix sodium base and lithium base lubricants.

LUBRICANT

Chassi. Lubricant No. 1

No. 1

No. O

No. OChassi. Lubricant

." ..,¡ Engine Oil;, ;.- ED,!:iDe Oil

.' En¡;ine Oi!Grease

Same as engineSame as eDgiDe

:.Samo a. engiDeSoft

Engine Oil

EDgine Oil

.,~,,, .Same as engiDe

Same as engiDe

12

Universal Joint LubricaDt t No. 1 No. O

MIL-L-210SB SAE 80 SAE 80

Wheel Bearing Lul>ricant t No. 2 No. 2

WheeI BeariDg LubricaDt t No. 2 No. 2

GL4 SAE 90 SAE 80

MIL-L-210SB* SAE 80 SAE 80

Chassi. Grease No. 1 No. O

Graphite Grease . Medium Medium

Graphite Grea.e

I Medium Medium

EngiDe Oil Same a. engine

Graphite Grease Light


engine lubrication is shown in Fig. 17. Maximumoil pressure in the system is limited by an oilpressure relief valve located on the oil pump. SeePar. D-63 and E-64.

8-6. Initial Lubrication

When a new vehic1e is placed in service or an engineis overhauled, the engine oil should be changedafter the first 500 miles [800 km.] of operation andagain after an additional 1500 miles [2.400 km.].The oil filter should be c1eaned and the elementreplaced after the first 2000 miles [3.200 km.] ofoperation. For a11 other vehic1e lubrication, fo11owthe instroctions given in the remainder of this sec-tion of this manual.

During the ron-in period, until the piston ringshave become seated, oil consumption in the engineis usua11y greater than that considered normal forproper lubrication. As much as 4000 miles [6.400km.] of operation may be required to properly seatthe rings and de crease oil consumption to normal.Do not overfi11 the crankcase as excess oil will berapidly dissipated. Under no conditions should anoil heavier than SAE 20W be used during thesummer or SAE 10W during the winter for the first500 miles [800 km.] when an engine is new or hasbeen rebuilt.

8-7. Engine CrankcaseThe oil in the crankcase should be changed aftereach 2000 miles [3.200 km.] of normal service, ormore often under any of the following exceptions.Change engine oil more frequently depending ontype and quality of oil used, severity of operatingconditions, and if vehic1e is driven short distancesin cold weather or a110wed to idle excessively.Always drain while crankcase oil is hot as sus-pended dirt and contaminents will more likely be

--0 '-

J'~ ,"!'.

-,.: ! ili-.::.

'-,:; I=-=;-~:~~.. J'=-~

,1~~"",~

-

"

r.\ '-

,)

[ 10847

FIG. 17-ENGINE LUBRICATION

held in suspension and, therefore, drain out morecompletely.a. Position drain receptac1e under plug.b. Remove drain plug using correct size wrench.Be careful of hot oil.c. Clean drain plug. Inspect and replace gasket ifdeteriorated.d. When oil has drained, replace and tightendrain plug. .

e. Check for' presence of excess water in the oilthat might indicate an internal leak from thecooling system.

8-8. Lubrication F'ittingsEach 1000 miles [1.600 km.] c1ean each lubricationfitting indicated by ~o. 1 on Lubrication Charts.Use a pressure gun to lubricate. Be sure that greasechannels are open to provide complete lubricationof bearing surfaces. In some cases it may be neces-sary to replace the lubrication fitting. In extremecases it may be necessary to disassemble and c1earplugged channels. The fo11owingpoints have lubri-cation fittings.a. Remote control gearshift base (Mode1s DJ-3Aand some models CJ-2A only).b. Tie rod: 4 fittingsc. Drag link (steering connecting rod): 2 fittingsd. Clutch pedale. Brake pedalf. Steering be11crankg. King pin: 4 fittings (Model DJ-3A only)h. Transfer case shift lever shaft (A11models ex-cept DJ-3A)i. Spring shackles and pivot bolts: See Par. B-9j. Prope11er shaft universal joints: See Par. B-10k. Rear wheel bearings: See Par. B-14

8-9. Spring Shackles and Spring Pivot 80lts. Mode1s CJ-3B, CJ-5, CJ-6, DJ-3AA11spring shackles and spring pivot bolts are shownas item 2 on the Lubrication Charts for thesemode1s, but some of these points will not havelubrication fittings. Where there is no lubricationfitting at one of these points, indicating a silentbloc bushing has been insta11ed, that point is notto be lubricated. Where there are lubricationfittings at the spring shackles or pivot bolts,lubricate at each fitting with a pressure gun every1000 miles [1.600 km.].

8-10. Propeller Shaft Universal JointsThe prope11er shaft universal joints and slip jointsare equipped with lubrication fittings. These shouldbe lubricated with a good quality universal jointor chassis grease each 1000 miles [1.600 km.] usinga hand compressor.

8-11. F'ront Axle Shaft Universal Jointsand King Pin 8earings

A114-wheel drive front axle shaft universal jointsand the front axle king pin bearings are enclosedin the steering knuckle housings. Check the lubri-cant level in the housings each 1000 miles [1.600km.] to maintain it at fi11plug level. Once each yearor at each 12,000 miles [19.200 km.] removethe

13

B LUBRICA TION

shafts. Thoraughly c1ean the universal joints andhousings and refill the housings with universaljoint lubricant. Use No. 1 for summer and No. ()for winter.

8-12. Steering GearCheck the lubricant level in the steering gear hous-ing at each 1000 miles [1.600 km.] to be sure thatthe lubricant is at filler plug opening leve!. Shouldlubricant be required fill the housing slowly witha hand compressor. Do not overlook replacing thefi11plug.

8-13. Front Wheel 8earingsSeasonally, or at each 6000 miles [9.600 km.],(10,000 miles [16.000 km.] for the Dispatcher), re-move the front wheels and repack the bearingswith wheel bearing grease. Work the grease intothe cage holding the rollers.Follow this same procedure for wheel bearingsfor 23-2 (full-floating) rear axle installed on earlyCJ-2A Models.

8-14. Rear Wheel 8earingsThe rear wheel bearings are equipped with lubri-cation fittings with a vent opening through thehousings above each fitting. Lubricate each 1000miles [1.600 km.]. Use a hand compressor and wheelbearing grease, forcing the grease through each lu-brication fitting until it flows fram the vent. Ventshould be kept c1ear of obstruction or grease willback up into the brakes. Do not add grease afterit flows from the vent for it may be forced throughthe wheel keyway onto the outside of the wheeland possibly onto the brake linings.For Model CJ-2A with 23-2 (full-floating) rearaxle follow the procedure of Par. B-ll for removingand repacking the rear wheel bearings.

8-15. 3-Speed Transmission andTransfer Case

. Models CJ-2A, CJ-3A, CJ-3B, CJ-s, CJ-6Maintain lubricant at fill plug level in both trans-mission and transfer case. Check level each 1000miles [1.600 km.] and add lubricant when necessary.Drain and refill both housings each 10,000 miles[16.000 km.].Service each assembly individual1y even thoughdrilled passages are provided in the housings foroil circulation and unit lu brication on all modelsexcept C]-2A before Serial No. 24196.Hard shifting of the gears in cold weather is apositive indication that the lubricant is too heavyagrade or the quality allows it to congeal at theprevailing temperature. If the oil is too heavy foreasy shifting it will not praperly lubricate theclosely fitted parts. Change the lubricant to alighter grade.

8-16. 3-Speed Transmission. Model D J -3AMaintain lubricant at fill plug leve!. Check leveleach 1000 miles [1.600 km.] and add lubricant whennecessary. Drain and refill housing each 10,000miles [16.000 km.].

14

8-17. Optional 4-Speed Transmissionand Transfer Case

. Models CJ-5 and CJ-6The four-speed transmission and transfer case re-quire separa te lubrication for each unit as theyhave no cross-over oil passage. At each transmissionservice check, the fill plugs of both four-speedtransmission and transfer case should be pulledand the lubricant refilled to level if necessary.

8-18. Front and Rear Axle DifferentialsCheck the level in each unit every 1000 miles[1.600 km.] to be sure that they are filled to thelevel of the filler plug openings. Drain and refillthe housings every 10,000 miles [16.000 km.].Do not mix different types of lubricants. Use alight engine or flushing oil to c1ean out the hous-ings. Do not use water, steam, kerosene or gaso-line for flushing.

8-19. Powr-Lok DifferentialSome vehic1es are equipped with locking differential(optional equipment). For identification of thisunit, see Par. N-15. Ordinary lubricants mustnot be used in the locking differentia!. Use onlyWillys Powr-Lok Differential Oil, Part No. 94557,furnished in pint cansoPowr-Lok differential may be c1eaned only bydisassembling the unit and wiping with c1ean rags.Do not flush the Powr-Lok unit.

8-20. DistributorThe distributor shaft is lubricated through anoiler mounted on the side of the housing. Placethree or four drops of light engine oil in the oilereach 1000 miles [1.600 km.]. Also place one dropof light engine oil on the wick located on the topof the shaft, which is made accessible by removingthe rotor armo Sparingly apply cam lubricant to thebreaker arm cam and place a drop of oil on thebreaker arm pivot.

8-21. GeneratorOilers are provided at each end of the generator.Place two to four drops of light engine oil in eachoiler every 1000 miles [1.600 km.].

8-21A. Starting Motor. Models CJ-2A (all) and CJ-3A to S/N 30972.Lubricate the starter with three to five drops ofengine oil every 1000 miles [1.600 km.] at an oilerlocated on the front (commutator) end.For other models, see Par. B-36.8-22. Oil FilterAfter the initial change specified in Par. B-5, c1eanthe oil filter and replace the element at each 6000miles [9.600 km.] of normal vehic1e use. Oil filterservicing should be performed at the same timeas one of the regular engine oil changes. At. thattime be sure to add one quart [1 ltr.] to the engineoi1 change requirement.

8-23. Oil 8ath Air Cleaner. Models CJ-3B, CJ-5, CJ-6. Optional on Model DJ-3AThese vehic1es are equipped with an oi1 bath type


,'-

4

FIG. 18-OIL BATH AIR CLEANER

I-Horo2-Flexible Connector

3-Hose Clamp4-Body5-Screw and Lóckwasher

6-Clamp

7-0il Cup

8-Clamp9-Hose

lO-Clampll-Gasket

air c1eaner, Fig. 18. This type c1eaner thoroughlyremoves a11 dust from the air before it enters thecarburetor. For efficient operation, the cleaner mustbe serviced at regular intervals. Service the unit ac-cording to conditions of vehicle operation.Care of the air cleaner is extremely vital to thelife of the engine. Pay particular attention to theamount of dust and dirt in the air taken into theengiI1e through the air cleaner. When dirt is notnoticeable in the air, service the air cleaner each2000 miles [3.200 km.]. Whenever the air is notice-ably dusty (for example when the vehicle is drivenon secondary roads or through fields) then servicethe air cleaner more frequently. Under extremecontinually dusty and dirty conditions where thevehic1e operates in clouds of dust and dirt, servicethe air cleaner daily.To service the air cleaner, unscrew the eye bolt onthe oil cup clamp and remove the oil cupo ScrapeaU dirt from inside the oil cup and c1ean the insidesurface with cleaning solution. Refill with new oil

I of the same viscosity as is recommended for theengine crankcase to the oi1 level bead and installthe cup securely to the cleaner body with theattaching clamp.AIso, the air cleaner body (less oil cup) should be~emoved from the vehicle and cleaned at weeklymtervals or oftener.To do this, loosen hose clamp, and remove hosefrom the c1eaner.

Detach breather hose [rom the fitting on thecJeaner. Remove the two wing screws and lift

J1

~~--- -~-, I..~~

FIG. 19-WIRE GAUZE AIR CLEANER

cleaner from vehicle. Agitate the cleaner bodythoroughly in cleaning solution to clean the filteringelemento Dry element with air hose but do notre-oil.Install the cleaner body in the vehicle with the twowing screws and attach hoses securely.Carefully check the hose clamps and fittings on thebreather hoses at frequent intervals. Loose con-nections will affect proper operation of the crank-case ventilating system.

8-24. Wire Gauze Air Cleaner. Model D J -3AThe air cleaner furnished as standard equipment onModel D J-3A is the wire gauze type shown in Fig.19. Dust particles in the air entering the air cleanerare deposited on the oil wetted wire gauze. Thisaccumulated dust on the wire gauze mesh canchoke off the air supply to the carburetor if theelement is not cleaned at regular intervals. It isimportant, therefore, that the air cleaner beserviced every 2000 miles [3.200 km.].To service the unit, first remove the wing nut andcover from the air c1eaner. Then lift out the wiregauze element and wash out the accumulated dustby plunging the element up and down in a containerfilled with clean solvento Allow the element toair dry; use of compressed air for drying the elementis not recommended. Inspect the element and thefelt seal in the cover. After the element is dry, dipit in engine oil of the same grade used fOf the oilchange. Allow the excess oil to drain. Wipe theinside of the housing and cover clean. Install theelement and cover. Tighten the wing nut securely.

8-25. Exhaust Manifold Heat Control Valve. Models CJ-2A, CJ-3A, DJ-3AThese models are equipped with a 4-cylinderL-head engine which incorporates an exhaustmanifold heat control valve. Lubricate the valveshaft and bushings at each 1000-mile lubrication.Place a few drops of penetrating oil at each end ofthe shaft where it passes through the manifold.Then move the valve up and down a few times towork the oil into the bushing.

15

B LUBRICATION

8-26. Speedometer CableRemove the speedometer cable from the tu beevery 12,000 miles [19.200 km.]. Clean it thoroughlyand coat it with a good quality light graphitegrease.

8-27. Flexible Controls - Choke, Throttle,Hand Brake

Each 12,000 miles [19.200 km.] or once ayear oilthe exterior surfaces of the flexible control conduitswith penetrating oi!. This will usually maintainsmooth operation with mínimum wear. Should thehand brake control cable require additional lubri-cation, remove it from the conduit and coat itwith light graphite grease.

8-28. Clutch LinkageLubricate all friction points of the c1utch linkageevery 1000 miles [1.600 km.]. Use the same gradeof engine oíl as used for the engíne. Faílure to lubri-cate these points will result in premature wear; thelinks will wear and the holes in the mating parts wil1become elongated.

8-29. 80dyOften attention is not given to the proper lubrica-tion of the body hardware. However, when this isdone it should be called to the owner's attentionto avoid soiled c1othing. A few drops of oil shouldbe placed on the tail gate and hood hinges. Thehood catch, hand brake ratchet, cowl ventilatorcontrol, and hood prop should be oiled for easyoperation.

8-30. ADDITIONAL PERIODIC SERVICES

8-31. Brake Master CylinderCheck the fluid level in the brake master cylinderevery 1000 miles [1.600 km.]. Wipe c1ean the topof the filler cap and also the housing area around it.Replenish the brake fluid to a level 72" [1,3 cm.]below the top of the fill hole. Use only heavy-dutybrake Huid conforming to specification SAE-70-R3.Be sure to handle the brake fluid in c1ean dispensersand containers that will not introduce even theslightest amount of other liquids. Replace andtighten the filler cap.

8-32. RadiatorThe exterior of the radiator core should be c1eanedand the radiator inspected for leaks each 1000miles [1.600 km.] of normal service of the vehic1e.If the vehic1e is subjected to considerable off-the-road operation, this interval should be each 1000miles or 30 days, whichever interval occurs first.Refer to Par. H-6.

8-33. Cooling SystemThe cooling system should be flushed twice ayearand checked for leaks, preferably in the spring andfall at the time of changing the antifreeze. Referto Par. H-1.

8-34. PARTS REQUIRING NO. LU8RICATION

8-35. Water Pump 8earíng,Clutch Release 8earing

The water pump and c1utch release bearings are

16

prelubricated for life when manufactured andocannot be relubricated.

8-36. Starting Motor 8earings. Models CJ-3A S/N 30972 and on, CJ-3B, CJ-S,

CJ-6, DJ-3AThe starting motor bearings are lubricated atoassembly to last between normal rebuild ¡;¡eriods,For other models, see Par. B-21A.

8-37. SpringsThe vehic1e springs should not be lubricated. At:assembly the leaves are coated with a long lastingspecial lubricant which is desígned to last the lifeof the springs.

8-38. Shock AbsorbersHydraulic direct-action shock absorbers are per-manently sealed and require no periodic lubrica-tion service. AIso the shock absorber mountingbushings are not to be lubricated.

8-39. LU8RICATION REQUIREMENTS FORFIELD AND INDUSTRIAL USE

Adequate lubrication becomes increasingly im-.portant when vehic1es are used in field or industriatwork and in many types of off-highway operation,for under these conditions all operating parts ofboth the engine and chassis are subjected to un."usual pressures. At the same time such operationis usually under abnormal dust and dirt conditions.making additional precautions necessary. The im-portance of correct lubrication for the conditions;of operation cannot be overestimated.

8-40. Engine OilUse only a nationally advertised brand of MS type.~!. .

No definite change interval can be recommendeddue to the great variety of uses and conditions oÍ"use. It is important, however, that the oil in a newor rebuilt engine be changed at the first eight 01'ten hours of operation and for heavy, dusty work,every fifty hours thereafter. Do not fail to watch.the condition of the oil c10sely and should it be-.come contaminated, change it immediately.

8-41. Chassis LubricationThe period of lubrication depends entirely upon.the type of work being done. Using the specified.interval of 1000 miles [1.600 km.] recommendedfor highway travel as a guide, lubricate at safe.intervals required for the type of operation beingdone. Under the usually extremely dusty conditionsof fie1d work lubricate these points daily.Be sure to force enough lubricant into each fitting-to force out the old lubricant which might becontaminated with grit and which would causerapid wear if allowed to remain.Do not place lubricant on the various ball andosocket joints or pivot points of the lift linkage as.dirt will accumulate to form an abrasive mixture.It is best to simply wipe these parts c1ean with a.c1oth.

8-42. Oíl FilterDismantle and c1ean the filter and re place theelement at the end of the first 100 hours of service<


UsualIy element replacement at each 150 hours ofadditional service will provide satisfactory filter-ing, however, under extreme conditions this maynot be true. The condition of the oil will indica tethe condition of the filter elemento Should the oilquickly become discolored aud show evidence ofcontamination, change the element without delay.

8-43. Air CleanerThe care of the air c1eaner is (;xtremely importantat alI times but especialIy s:> when the vehic1eis used for industrial or field work.When operation is under dusty conditions, c1eanand refilI the c1eaner reservoir to the fulI markdaily and under extreme conditions twice daily.When servicing the unit, use a suitable tool todislodge dirt c1inging to the bottom and sides ofthe intake passage within the body of the c1eaner.

8-44. Front Axle Shaft Universal Joints

The front axle steering knuckle pivot pins (kingpins) are supported in housings at each end of thefront axle which also enc10se the front axle shaftuniversal joints.Maintain the lubricant level in the housings evenwith the filler plug openings at all times. For fieldor industrial use remo ve the universal joints twiceyear1y, thoroughly c1ean both the housings andjoints with a suitable solvent and refill the housingsto the filler plug opening levels with the correctlubricant as shown in the appropriate LubricationSpecification Chart.

8-45. Transmission and Transfer CaseThe combined capacity of the two housings issmall for economy, making it important that thelubricant be changed at regular intervals.For heavy duty farm or industrial work, drainboth housings every 300 hours of operation and re-filI to the filler plug opening levels.

8-46. Front and Rear Axle DifferentialsBecause of the higher pressures developed in theaxle assemblies with heavy-duty operation drain,flush, and refill the differential assemblies each 300hours of operation. Use only flushing oil or lightengine oil to c1ean out the housings (except Powr-Lok differentials).

8-47. Power Take-Off and Pulley DriveCheck the lubrication level each time the vehic1eis lubricated to be sure that the housings are filledto filler opening levels. Should the units be usedoften drain and refill the housings each 300 hoursof operation.

8-48. Power Take-Off Propeller ShaftUniversal Joints

For average use the original factory lubricationwill last the life of the vehic1e. Should the powertake-off be used often, however, for long periods oftime, disassemble and repack the joints once eachyear.When repacking, guard against overfilling forhydraulic action may damage the boots. Thecapacity of each joint is one fluid ounce.

8-49. Centrifugal GovernorCheck the oillevel in the governor housing at eachvehic1e lubrication. Use the same seasonal gradeoil as is used in the engine and change oil at eachengine oil change. Do not fill the housing abovethe leve! indicating plug opening. Keep the ventin the filler plug open at all times.

8-50. Hydraulic Lift LubricationFor lubrication requirements for the MonroeHydraulic Lift, refer to Seco U.

17

b section

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