Jeep UNIVERSAL CJ-2A User manual

•
· SERVICE
.- -:~· ·.MANUAL
FOR .
•.
· UNIVERSAL
_ . Jeep
VEHICLES
.
.
0 ~
0 '
. 1
• 0
t
. 1

SERVICE
MANUAL
JeeJl UNIVERSAL
4-WREEL DRIVE
CJ-2A
CJ-38
CJ-3A CJ-5
CJ-6
JeeJ! DISPATCHER
2-WHEEL DRIVE
DJ-3A
ORIGINAL REPRODUCTIONS
P. 0. BOX 74
UPLAND, CALIFORNIA 91786
FORM SM-1002-R6
1965 KAISER JEEP CORPORATION
NOW JEEP CORPORATION
REPRINTED BY PERMISSION OF
COPYRIGHT OWNERS
SECTION INDEX
Name
Section
General Data A
Lubrication B
Tune-Up c
L-Head Engine D
F-Head Engine E
Fuel System F
Exhaust System G
Cooling System H
Electrical I
Clutch J
Transmission
Transfer Case
~
Propeller Shafts
~
Front Axle M
..
Rear Axle N
Steering 0
Brakes p
Wheels Q
Frame R
Springs
Shock Absorbers s
Body T
Miscellaneous u
(

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
A
GENERaL DATA
Contents
SUBJECT PAR.
Axles ..................................... A-8
Carburetor ................................ A-9
Distributor .............................. A-13
Engine Serial Number ...................... A-6
Fuel Pump .............................. A-10
General Specifications ..................... A-17
Generator ............................ ' ... A-ll
Identification Number Location ............. ,A.-4
A-1. GENERAL
This manual is provided for the guidance of all
automotive service men, vehicle owners, and
service salesmen who repair, maintain, or adjust
the 'Jeep' Universal and 'Jeep'. Dispatcher. The
information herein was prepared from the service
man's viewpoint to give him the accurate and con-
cise
data he may need to service the entire vehicle.
The information is not elementary as it is intended
for automotive service men who are familiar with
automotive construction and repair in general. It
is not intended, nor would it be possible in such
limited space, to cover every possible repair that
he may encounter. All specifications are in accord
with Engineering Specifications and should be
adhered to in all work on the vehicle.
The manual sections follow logical division into
major components of the vehicles. The first page
of each section has a detailed index of the contents
of that section. Subject matter covers all models
included in this manual unless an exception for a
particular model is specifically mentioned.
Specifications and components covered were for
standard production models of 'Jeep' Vehicles
current at the time the manual was approved for
printing. Kaiser 'Jeep' Corporation reserves the
right to discontinue models at any time or change
specifications or design of any of its models with-
out notice and without incurring any obligation.
A-2. Vehicle Description
This manual covers all standard production 'Jeep'
Universal and 'Jeep' Dispatcher models currently
being produced at the time this manual was ap-
proved fdr publication. Significant changes made
in each model sitice it was first produced are in-
cluded in the manual.
A description of each model follows. General
specifications for each model are listed in Par. A-17.
Detailed specifications covering major vehicle units
are listed at the end of each section of the. manual.
CJ-2A -·This is a 4-wheel-drive 'Jeep' Universal.
It has a four-cylinder, L-head engine.
This model is no longer in current pro-
duction.
SUBJECT PAR.
lgnition Coil. ............................ A-12
Paint-and-Trim Option Plate ................. A-7
Radiator ................................ A-14
Starting Motor ........................... A-15
Vehicle
Description ........................ A-2
Vehicle
Identification ....................... A-3
Vehicle
Serial Number ...................... A-5
Voltage Regulator ........................ A-16
CJ-3A -This is a 4-wheel-drive 'Jeep' Universal.
It has a four-cylinder, F -head engine.
This model is no longer in current pro-
ductiop.
CJ-3B ---:-This is a 4-wheel-drive 'Jeep' Universal.
It has a four-cylinder, F-head engine.
CJ-5 -This is a 4-wheel-drive 'Jeep' Universal.
It has a four-cylinder, F-head engine.
CJ-6 -This is a 4-wheel-drive 'Jeep' Universal.
It has a four-cylinder, F-head engine.
DJ-3A- This is a 2-wheel-drive 'Jeep' Dispatcher.
It has a four-cylinder, L-head engine. It
comes as eith~r an open body model or
has a "Surrey" top.
A-3. Vehicle Identification
Each 'Jeep' vehicle model series has one or more
serial number prefixes to identify it. Complete
identification of a specific vehicl<:: requires the
prefix plus the serial number. Serial numbers are
consecutive for each prefix grouping. Prefix infor-
mation following will identify the 'Jeep' model by
serial number prefix.
:Jeep' ~ode~
CJ-2A
CJ-3A
CJ-3B
CJ-5
CJ-6
DJ-3A
Prefix
no prefix
no prefix
451-GBl
452-GBl
453-GBl
453-GB2
454-GB2
57348
57548
57748
56337
Serial Number
---'·------·-
5- or 6-digit S/N
5-digit S/N
5-digit S/N
5-digit S/N
5-digit S/N
5-digit S'N
5-digit S/N
5-digit S1N
5- or 6-digtt S ·N
5-dig_it S 'N
5-digit S N
Any prefix not given here for one of the listed
models indicates a special vehicle wh06e differences
from standard are not covered ih thi!$ manual.
3
(

GENERAL DATA
A-4. IDENTIFICATION NUMBER
LOCATION
All 'Jeep' vehicles and some of their major com-
ponents have identifying numbers. Paragraphs fol-
lowit:tg will describe the location of identifying
numbers.
A-5. Vehicle Serial Number
The vehicle serial number is stamped on a metal
plate located on the dash under the hood. It is on
the left side of the vehicle for models CJ -5 and
FIG. ·1-CJ-5, CJ-6 VEHICLE
SERIAL· NUMBER LOCATION
FIG. 2-CJ-2A, CJ-3A, CJ-3B, DJ-3A
VEHI.CLE SERIAL NUMBER LOCATION
CJ -6 as shown in Fig. 1. It is on the right side of
.the ve}J.icle .for,models. CJ-2A, CJ-3A, CJ-3B, and
D J-3A as i!hown in Fig. 2. Refer . to Par. A-3 for
specific
information on codes.' . .'
4
(.
A-6. Engine Serial Number
The engine identification number consists of a
prefix followed
by a five-digit or six-digit serial
number. The prefix identifies the particular engine.
F4-134
and L4-134 engine serial numbers are
stamped on the water pump boss at the front of
the engine, as shown in Fig. 3.
FIG. 3-ENGINE SERIAL NUMBER LOCATION
A-7. Paint-and-Trim Option Plate
A Paint-and-Trim Option Plate is installed on late
production 'Jeep' vehicles. The paint code on the
plate identifies the paint colors. The trim code on
the plate identifies the color of all trim parts in the
interior of the vehicle. '
FIG; +-PAINT AND TRIM
OPTION PLATE LOCATION
To identify paint or trim on vehicles manufactured
before the Paint-and- Trim Option Plate was in-
stalled, see your 'Jeep' dealer.
'Jeep~ Universals and Dispatchers have the plate
.located on the right hand side of the dash under
the hood, as shown in Fig. 4.

·Jeep' UNIVERSAL and 'Jeep' DISPATCHER
A
A-8. Axles
All live axles on 'Jeep' vehicles are identified by a
model number cast into the axle differential housing
near or on one of the reinforcing webs, as shown in
Fig. 5. The differential gear ratio may be de-
termined from the axle ratio tag installed under
one of the gear cover screw heads. The tag lists the
number of teeth on the gear and also on the pinion.
Some tags also list the gear ratio.
FIG. 5-AXLE MODEL NUMBER LOCATION
A-9. Carburetor
Carburetors are identified by' the manufacturer's
model number stamped or cast into the carburetor
body, as shown in Fig. 6.
FIG. 6-CARBURETOR MODEL NUMBER LOCATION
A-10. Fuel Pump
Fuel pumps are identified by the manufacturer's
model number. The model number is stamped on
the edge of the pump mounting flange. The manu-
facturer's name is cast into the pump body. See
Fig. 7.
FIG. 7-FUEL PUMP MODEL NUMBER LOCATION
A-11. Generator
Generators are identified by the manufacturer's
model number stamped on a metal plate attached
to the generator housing, as shown in Fig. 8.
FIG. 8-GENERATOR MODEL NUMBER LOCATION
5

A
GENERAL DATA
--------------------------------------
A-12. Ignition Coil
Ignition coils are identified by the manufacturer's
model number stamped on the coil housing bt>low
the top flange, as shown in Fig. 9.
.. ·;,.
FIG. 9-IGNITION COIL
MODEL NUMBER LOCATION
A-13. Distributor
Ignition distributors are identified by the manu-
factprer's model number stamped on a plate at-
tached to the distributor housing, as shown ~n:Fig.
10.
FIG. 10-DISTRIBUTOR
MODEL NUMBER LOCATION
A-14. Radiator
Radiators are identified by markings on the top
tank, usually on the top or rear face, as shown in
FIG. 11-RADIATOR MODEL NUMBER LOCATION

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
A
Fig. 11. Individual markings vary with each
radiator manufacturer.
A-15. Starting Motor
Starting motors are identified by a manufacturer's
model number stamped on a metal tag attached to
the motor housing, as shown in Fig. 12.
FIG. 12-STARTING MOTOR
MODEL NUMBER LOCATION
A-16. Voltage Regulator
Voltage regulators are identified by a manu-
facturer's model number stamped on the regulator
base flange, as shown in Fig. 13.
FIG. 13-VOLTAGE REGULATOR
MODEL NUMBER LOCATION
....
7

A
GENERAL DATA
A-17. GENERAL SPECIFICATIONS
MODEL:
Engine: .......................... .
Number of cylinders ............. .
Bore .......................... .
Stroke ......................... .
Displacement ................... .
Compression Ratio .............. .
Compression Pressure ......... .
Horsepower (max. brake) ........ .
Horsepower (SAE) .............. .
Torque (max. at 2000 rpm.) ...... .
Wheelbase ....................... .
Tread (front and rear) ............. .
Height (over all):
Open body ..................... .
Soft top ....................... .
Hard top ..................... .
Length (over all):
Open body .................. .
Soft top ....................... .
Hard top ....... .
Width (over all):
Open body ..................... .
Soft top .............. · ......... .
Hard top ...................... .
Ground Clearance ................. .
Weights (approximate):
Shipping
Open body .................. .
Soft top .................... .
Hard top .................... .
Curb
Open body ................... .
Soft top .................... .
.
.Hard top ................... .
Gross
Open body ................... .
Soft top ..................... .
Hard top .................... .
Capacities:
Fuel tank ...................... .
Cooling System:
Without heater ........... .
With heater. . . . . . . . . . . . . . . . ..
MODEL:
Engine:...................... . ..
Number of cylinders ............. .
Bore ................. .
Stroke ............. .
Displacement .......... .
Compression Ratio:
Standard .................... .
High Altitude (opt.) .. .
Compression Pressure .... .
Horsepower (max. brake) . . . . . . . .
Horsepower ( SAE) .......... .
Torque (max. at 2000 rpm.) ...... .
Wheelbase ................ .
Tread (front and rear) ....... .
Height (over all). . . . . . . . . . . . ..
Length (over all) ................ .
Width (over all).............. . ..
Ground Clearance. . . . . . . . . . . .
Weights (approximate):
Shipping .......... .
Curb.......... . . . . . . . .
Gross ....................... .
Capacities:
Fuel tank ........ .
Cooling System:
Without heater ............... .
With heater .................. .
8
CJ-2A
. L,Head
4
3)/g" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. in. [2,20 ltr.}
6.48:1
100 psi [7 kg-cm2]
60 at 4000 rpm.
15.63
105 lb-ft [14,5 kg-m.]
80" [203 em.]
48~" [122,5 em.]
69" [175 em.]
130)/g" [3,3 m.]
59" [149,8 em.]
8%:" [22,2 em.]
2120 lb. [961,6 kg.]
2215
lb. [1004,7 kg.]
3509 lb. [1587,5 kg.]
1072 gal. [40 ltr.]
11 qt. [10,4 ltr.]
12 qt. [11,4 ltr.]
CJ-3B
F-Head
4
3)/g" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. in. [2,20 ltr.]
6.9:1
7.4:1
120 to 130 psi.
[8,4 a 9,2 kg-cm2]
72
at 4000 rpm.
15.63
114
lb-ft [15,7 kg-m.]
80" [203 em.]
48?{6" [123 em.]
66~" [169 em.]
1292%2" [3,30 m.]
68Ys" [175 em.]
8" [20,3 em.]
2132
lb. [967 ,1 kg.]
2243
lb. [i017 ,4 kg.]
3500 lb. [1587,5 kg.]
10 72 gal. [38,75 ltr.]
11 qt. [10,4 ltr.]
12 qt. [11,4 ltr.]
CJ-3A
L-Head
4
3Ys" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. ih. [2,20 ltr.]
6.48:1
100 psi [7 kg-cm2]
60 at 4000 rpm.
15.63
105 lb-ft [14,5 kg-m.]
80" [203 em.]
48~" [122,5 em.]
66%:" [170 em.]
129%:" [3,29 m.]
68256" [174,7 em.]
. ...
8%:" [22,2 em.]
2110 lb. [957,1 kg.]
2205 lb. [1000,2 kg.]
3500 lb. [1587,5 kg.]
1072 gal. [40 ltr.]
11 qt. [10,4 ltr.]
12 qt. [11,4 ltr.]
CJ-5
F-Head
4
3Ys" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. in. [2,20 ltr.]
6.9:1
7.4:1
120 to 130 psi.
[8,4 a 9,2 kg-cm2]
72
at 4000 rpm.
15.63
114
lb-ft [15,7 kg-m.]
81" [206 em.]
48?{s" [123 em.]
67" [170 em.]
135%" [3,44 m.]
71 %:" [128 em.]
8" [20,3 em.]
2163
lb. [981,1 kg.]
2274
lb. [1031,5 kg.]
3750 lb. [1701,0 kg.]
1072 gal. [38,75 ltr.]
11 qt. [10,4 ltr.]
12 qt. [11,41tr.]
DJ-3A
L-Head
4
3Ys" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. in. [2,20 ltr.]
7.00:1
100
psi [7 kg-cm2]
60 at 4000 rpm.
15.63
lOS lb-ft [14,5 kg·m.]
80" [203 em.]
48~" [122,5 em.]
59Ys" [150 em.]
621%;" [160 em.]
71~" [181 em.]
125?16" [3,18 m.]
130" [3,3 m.]
129" [3,28 em.]
57)/g" [145,3 em.]
57Ys" [145,3 em.]
72%:" [184,8 em.]
7" [17,8 em.]
1709 lb. [775,2 kg.]
1769
lb. [802,4 kg.]
2004 lb. [909 kg.)
1815
lb. [823,4 kg.]
1875
lb. [850,5 kg.)
2110 lb. [957 kg.)
2600 lb. [1179,3 kg.]
2600 lb. [1179,3 kg.]
3200 lb. [1451,4 kg.]
12 gal.
[45 ltr.]
11 qt. [10,4 ltr.]
12 qt. [11,4 ltr.]
CJ-6
F-Head
4
3)/g" [79,37 mm.]
4%" [111,12 mm.]
134.2 cu. in. [2,20 ltr.]
6.9:1
7.4:1
120 to 130 psi.
[8,4 a 9,2 kg-cm2]
75
at 4000 rpm.
15.63
114
lb-ft [15,7 kg-m.]
101" [257 em.]
48?{6" [123 em.]
67" [170 em.]
155%" [3,95 m.]
71%:" [128 em.]
8" [20,3 em.]
2225
lb. [1009,2 kg.]
2336
lb. [1059,6 kg.]
3900 lb. [1769,0 kg.]
1072 gal. [38,75 ltr.]
11 qt. [10,4 ltr.]
12 ~· [11,4ltr.]

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
B
LUBRICaTION
Contents
SUBJECT PAR.
Air Cleaner ......................... B-23, B-43
Body ................... : .. : ............. B-29
Brake Master Cylinder .................... B-31
Choke Control. .......................... B-27
Clutch Linkage ........................... B-28
Clutch Release Bearing .................... B-35
Differential:
Conventional. ..................... B-18, B-46
Powr-Lok .............................. B-19
Distributor .............................. B-20
Engine Crankcase ................ B- 2, B-7, B-40
Field and Industrial Use ................... B-39 ·
Flexible Controls ......................... B-27
Front Axle U-Joint ................. ·.B-11, B-44
Generator ............................... B-21
Governor ................................. B-49
Hand Brake Control. ..................... B-27
Heat Control Valve ....................... B-25
Hydraulic Lift ........................... B-50
Initial Lubrication ........................ B-6
B-1. GENERAL
It is highly important that the correct amounts of
the proper lubricants be used at regular intervals.
The specifications given in the charts and detailed
description of this section should be closely fol-
lowed. Special lubricating instructions for field and
industrial use are given as the last part of this
section.
B-2. Engine Oil Classifications
The American Petroleum Institute has a system
of classifying 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 the
most 'severe and becomes intensified even more in
cold weather. In cpntrast, constant-speed driving
on highways is the least severe.
Depending upon. conditions of operation, either
MM or MS grade is recoii).mended for Jeep vehicles.
It is also necessary to specify the SAE number in
addition to the above classification.
B-3. Lubricant Base
Sodium base lubricants are used at the factory for
initial fill of the wheel bearings, front axle shaft
universal joints, and propeller shaft universal joints.
Because mixing of sodium base and lithium base
lubricants results in a thinned-out mixture that
can bleed through seals, always use sodium base
SUBJECT PAR.
King Pin Bearings ........................ B-11
Lubrication Fittings .................. B-8, B-41
Oil Filter ........................... B-22, B-42
Oil Pressure .............................. B-4
Power Take-Off .......................... B-4 7
Propeller Shaft U- Joints ................... B-10
Radiator ................................ B-32
Shock Absorbers .......................... B-38
Speedometer Cable ....................... B-25
Spring Shackles and Pivot Bolts ............ B-9
Springs .................................. B-37
Starting Motor ........................... B-36
Steering Gear ............................ B-12
Throttle Control. ......................... B-27
Transfer Case ....................... B-15, B-45
Transmission ........................ B-15, B-45
· U-Joints, Front Axle ................. B-11, B-44
U- Joints, Propeller Shaft .................. B-10
Water Pump Bearing .......... .' .......... B-35
Wheel Bearings ........................... B-13
wheel bearing and universal joint lubricants on
'Jeep' vehicles. Should oil leaks occur at these
bearings, thoroughly remove the old lubricant
before new lubricant is added.
B-4 .. Oil Pressure Gauge or Indicator
On Models CJ-2A, CJ-3A, and early CJ-3B an
oil pressure gauge is mounted on the instrument
panel. This gauge indicates the oil pressure within
the engine lubricating system.
On Models CJ-5, CJ-6, DJ-3A and later production
vehicles of Model CJ-3B a red telltale lamp, which
operates when the ignition switch is t;urned on, is
lit when there is insufficient oil pressure to properly
lubricate the engine. When it goes out, operating
pressure is achieved. In normal operation, the light
is lit when the ignition is. first turned on. It goes
out after the vehicle is in motion.
Failure of the gauge or indicator to register normal
oil pressure may indicate insufficientsupply of oil
in the engine crankcase, low or no oil pump pres-
sure, or a fault in the gauge or indicator electrical
circuit. The engine must be stopped immediately
to prevent possible damage to engine bearings and
the fault corrected before restarting the engine. '
B-5. Engine.Lubricating System
The engine is pressure lubricated by a gear type
oil pump driven by a spiral gear on the. camshaft.
Oil is drawn through a floating, screened' l.ntake to
prevent the recirculation of-any sediment or water
that might . accumulate in the oil pan. Typical
Text continued ori page 13.

B
LUBRICATION
LUBRIC.ATION SPECIFIC.ATIONS
MODELS CJ
-28 aND CJ -38
FIG. 14-LUBRICATION CHART-MODELS CJ·2A AND C".J-.IA
r
Chart
ITEM TO BE
No.
I:;.UBRICATED
I
--···-(-----------
1.
Chassis Bearings . .....
2.
Engine ...............
3.
Transmission and
Transfer Case . ......
4. Differentials:
Front ..............
Rear ...............
5.
Universal Joints
Front Axle .........
6.
Steering Gear . ........
7.
Universal Joints
Propeller Shaft ......
8.
Distributor:
Oiler ...............
Wick ..............
Pivot ..............
Cam ...............
9.
Generator and
Starting Motor** . ...
10.
Front Wheels .........
11. Rear Wheels** . .......
13.
Governor .............
14.
Power Take-Off .•.....
15. Universal Joints
Power Take-Off .....
Air Cleaner . ..........
Not lower than 32'F. [O'C.]
use SAE 30 or
lOW-30
FREQUENCY*
Each 1000 miles (1.600 km.l
Change each 2000 miles [3.200 km.l
{Check each 1000 miles 11.600 km.l
Change each 10,000 miles [16.000 km.l
{Check each 1000 miles [1.600 km.]
Change each 10,000 miles (16.000 km.]
{Check each 1000 miles [1.600 km.]
Change each 12,000 miles 119.200 km.]
Check each 1000 miles (1.600 km.l
Each 1000 miles [1.600 km.J
Each 1000 miles [1.600 km.!
Each 1000 miles (1.600 km.]
Each 1000 miles (1.600 km.]
Each 1000 miles (1.600 km.]
Each 1000 miles 11.600 km.!
Disassemble to lubricate each
6000 miles [9.600 km.]
Sparingly each 1000 miles [1.600 km.J
Check each 1000 miles [1.600 km.l
Check each 1000 miles (1.600 km.]
Extensive use: Repack once a year.
Each 2000 miles 13.200 km.J
As low as lO'F. [-12'C.I
use SAE 20, 20W.
lOW-30. or lOW-20
QUANTITY
i
LUBRICANT
GRADE
u.s. Imperial
Metric
TYPE
Summer I
Winter
-------------
As required
Chassis Lubricant
No.1 No. 0
4 qts. 3)i qts 3.785ltrs.
Engine Oil
See Note
3 Y. pts.
3 pts.
1.65 ltrs.
GL4
SAE 90 SAE 80
2 Y. pts.
2 pts.
1.18 ltrs.
MIL-L-2105B SAE 80 SAE 80
2%: pts.
2 >4" pts. 1.3 ltrs.
MIL-L-2105B
SAE 80
SAE80
As required Universal Joint Lubricantt
No.1
No. 0
As required MIL-L-2105B
SAE 80 SAE 80
As required Universal Joint Lubricantt·
No.1 No. 0
Several drops
Engine Oil
Same as engine
One drop
Engine Oil
Same as engine
One drop
I
Engine Oil
Same as engine
Sparingly Grease
Soft
2-4 drops Engine Oil
Same as engine
As required
Whed Bearing Lubricantt No.2
No.
2
As required Wheel Bearing Lubricantt
No.2 No. 2
As required
Engine Oil
Same as engine
As required
GL4 SAE80 SAE80
As required Chassis Lubricant
No.1 No. 0
lli pts. 1 pt. .591 ltrs. En~ine Oil
Same as engine
As low as -lO'F. [-23'C.]
use SAE lOW,
lOW-30, or lOW-20
Below -10'F. [-23'C.]
use SAE 5W or
5W-20
*This chart applies for usual road work. For additional lubrication requirements when used for field or industrial work, see Par. B-39.
**Starting motor bearings on Model CJ-3A nhicles after Serial No. 30972 were lubricated at assembly to last between normal rebuild periods.
***Rear wheels must be removed from Model CJ-2A vehicles before Serial No. 13413 to lubricate wheel bearings.
tSodium base lubricants recommen.:ied; do not mix sodium base and lithium base lubricants.
10

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
LUBRICA.TION SPECIFICA.TIONS
MODELS CJ-3B, CJ-5
A.ND CJ-6
FIG. 15-LUBRICATION CHART-MODELS CJ-3B, CJ-5, CJ-6
B
11096
i !
QUANTITY
LUBRICANT
CHART ITEM TO BE
I
NO.
LUBRICATED
I
FREQUENCY TYPE
I
GRADE
I
u.s. Imperial
Metric
1000 miles-1.600 km.
Summer
I
Winter
----
I. Chassis Bearings . ........
Each 1000 miles As required Chassis Lubricant
No.1 No. 0
2.
Spring Shackle Bushings ...
{With lube fittings: Each IOOO miles
I
As required Chassis Lubricant
No.1 No. 0-
I
Spring PivotBoltBushings
Without lube fittings: No lubrication
I
Universal Joints
Each 1000 miles
I
Universal Joint
No.1
No. a
I
As required
Lubricantt
3
Propeller Shaft
.......
{Check each 1000 miles
Universal Joint
4. Front Axle Shaft .......
Change each 12.000 miles (19.200 Km.J
As required
Lubricantt
No.I
No. 0
5. Steering Gear Housing . ... Check each 1000 miles
As required
MIL-L-2105B SAE 80
SAE 80
6
Rear Wheelo ............. Sparingly each 1000 miles
As required
\''heel Bearing
No.2
No.2
.... ubricantt
1. Front Wheels .....
······
Disassemble to lubricate each
I
As required
Wheel Bearing
No.2
No.2
I
6000 miles (9.600 km.J
Lubricantt
I
8. 3-SpeedTransmission and
{Check each 1000 miles 67!! pts. 5 72 pts. 3 ltrs.
GL4
SAE90
SAE 80
Transfer Case . .........
Change each 10,000 miles
04-Speed.
Transmission I Check each 1000 miles 6')4 pts. 5')4 pts.
3,2 ltrs.
GL4
SAE 90 SAE 80
Transfer Case . ...........
t Change each 10,000 miles 3~ pts. 3 pts. 1,7 ltrs.
GL4
SAE 90 SAE 80
Differentials
'1.
Front ................. {Check each 1000 miles
I
2 7li pts. 2 pts. 1,2
ltrs.
MIL-L-210SB•
SAE80
SAE 80
lu. Rear .................. Change each 10,000 miles
2 72 pts. 2 pts. 1,2
ltrs.
MIL-L-2105B*
SAE 80 SAE 80
Speedometer Cable ....... Disassemble to lubricate each
As required
Graphite Grease
Light
12,000 miles (19.200 km.l
Distributor
Oiler ..................
Each 1000 miles
Several drops
Engine Oil
Same as engine
Wick .................
Each 1000 miles
One drop
Engine Oil
Same as engine
Pivot ................. Each 1000 miles
One drop
Engine Oil
Cam ..................
Each 1000 mileo
-:.
2 c. c.
Cam Lubricant
Same as engine
I
I
Air Cleaner . .............
Generator ...............
Engine ..................
0 0
Not lower than 32 F. (0 C.)
use SAE 30 or
10W-30
Each 2000 miles
Each 1000 miles
Change each 2000 miles
0 -0
Not lower than 10 F.~ 12 C)
use SAE 20, 20W.
lOW-30, or lOW-20
1 )4 pts.
14 qts.**
*For Powr-Lok differential use only Willys Powr-Lok Differential Oil, Part No. 94557 .
..,When oil filter ia changed at the same time, add one quart jone ltr .j
1 pt.
591,4cm'
2-4 drops
3 72 qts. 3,8 ltrs.
0 0
As low as 10 F. ( 23 C.)
use SAE lOW,
lOW-30, or !OW-20
0
4-Speed transmission and transfer case (optional on CJ-5 and Cj-6) require separate lubrication of each unit.
tSodium base lubricants recommen&:~d; do not mix sodium base and lithium base lubricants.
Engine Oil
Engine Oil
Same as engine
Same as engine
0 0
Below 10 F. ( 23 C.)
use SAE SW or
SW-20
11

B
CHART I
ITEM TO BE
NO. LUBRICATED
1. Chassis Bearings. , ....... ...
2. Spring Shackle Bushings
Spring Pivot Bolt Bushings
3. Universal Joints ........
. .
4.
Steering Gear Housing ..
5. Rear Wheel Bearings ....
I
6.
Front Wheel Bearings ...
7.
3-Speed Transmission .. .....
8. Differential ........ .... . ..
9.
Remote Control Shift ...
10. Hand Brake Control
Handle Cable ....... ....
11.
Hand Brake Control
Cable Rear .........
12. Generator ..........
Speedometer Cable ....
. .
...
Distributor:
Oiler ............ ... ......
Wick ..... ....
Pivot .. . . ..
Cam ........... ...... ..
Air Cleaner (Oil bath) ...
. ...
Gentra tor . . . ......... ...
...
Engine •..... . . . . . . . . . . . . . . . I
0
Not low~r tha" 32 F. (0°C.)
use SAE 30 or
lOW-30
LUBRICATION
LUBRICaTION SPECIFICaTIONS
MODEL DJ-3a "DISPaTCHER"
FIG. 16-LUBRICATION CHART-MODEL DJ-3A
FREQUENCY
1000 miles~ 1.600 km.
Each 1000 miles
fWith lube fittings: Ea~h 1000 mihs
l Without lube fittings: No lubrication
Each 1000 miles
Check each 1000 miles
Sparingly ea~h 1000 miles
Disassemble to lubricate each
10,000 miles
'Check each 1000 miles
\Change each 10,000 miles
r Check each 1000 mile•
\Change each 10,000 miles
Ea€h l 000 mii:es
Each 10,000 miles
Each 10,000 miles
Each J 000 miles
Disassemble to lubricate each
12,000 mile• [l 9-200 km.J
Each 1000 miles
Each 1000 miles
Each 1000 miles
Each 1000 miles
Each 2000 miles
Each 1 000 miles
Chan!!e each 2000 miles
0 0
As low as 1l'l F. (-12 C.)
use SAE 20, 20W,
lOW-30, or lOW-20
QUANTITY
I
LUBRICANT
GRADE
u.s. fmperial Metric
TYPE
I
Summer Winter
-------------
As required
Chassis Lubricant
No.1 No. 0
As required
Chassis Lubricant
No.1 No. 0
Aa required
Universal Joint Lubricant t
No.1
No. 0
As required
MIL-L-2105B
SAE 80 SAE 80
As required
V/heel Bearing Lubricant t No.2 No.2
As required
Wheel Bearing Lubricant
t
No.2 No.2
1 Y, pta.
1 .!4 pts.
0,7 ltrs GL4
SAE90 SAE 80
2 pts.
1% pts.
0,9lll s MIL-L-21 OSB*
SAE 80
SAE 80
As required
Chassis Grease
No.1
No. 0
As required Graphite Grease
Medium Medium
As required Graphite Grease
Medium Medium
2 to 4 drops Engine Oil Same as engine
As required Graphite Grease Light
Several drops
Engine Oil
Same as engine
One drop Enp;ine Oil
Same as engine
One drop
Engin~ Oil Same as engine
Sparingly
Grease
Soft
1 J4 pts.
1 pt . 0,6 ltrs. Engine Oil Same as engine
2 to 4 drops Engine Oil Same as engine
4 qts.**
3 Yz qts.
3.8 ltrs.
0 0
As low as -10 F. (-23 C.)
use SAE lOW,
lOW-30, or lOW-20
0 0
Below -10 F. (-23 C.)
use SAE SW or
5W-20
·'"For Powr-Luk diflcrential use only Willya Powr-Lok Differential Oil, Part No. 94557.
**When oil filter is changed at the same time, add one quart lon" ltr,J.
tSodium base lubricant recommended; do not mix sodium base and lithium base lubricants.
12

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
B
engine lubrication is shown in Fig. 17. Maximum
oil pressure in the system is ·limited by an oil
pressure relief valve located on the oil pump. See
Par. D-63 and E-64.
B-6. Initial Lubrication
:VVhen a new vehicle is placed in service or an engine
1s overhauled, the engine oil should be changed
aft~r the first 500 miles [800 km.] of operation and
agam after an additional 1500 miles [2.400 km.].
The oil filter should be cleaned and the element
replac~d after the first 2000 miles [3.200 km.] of
operat10n. For all other vehicle lubrication follow
the instructions given in the remainder of this sec-
tion of this manual.
During the run-in period, until the piston rings
?ave become seated, oil consumption in the engine
1s usually greater than that considered normal for
proper lubrication. As much as 4000 miles [6.400
km.]_of operation may be required to properly seat
the nngs and decrease oil consumption to normal.
Do not overfill the crankcase as excess oil will be
rapidly dissipated. Under no conditions should an
oil heavier than SAE 20W be used during the
summer or SAE 1OW during the winter for the first
500 miles [800 km.] when an engine is new or has
been rebuilt.
B-7. Engine Crankcase
The oil in the crankcase should be changed after
each 2000 miles [3.200 km.] of normal service, or
more often under any of the following exceptions.
Change engine oil more frequently depending on
type. a_nd qualit:'( of oil used, severity of operating
cond1t1ons, and 1f vehicle is driven short distances
in cold weather or allowed to idle excessively.
Always drain while crankcase oil is hot as sus-
pended dirt and contaminents will more likely be
FIG. 17-ENGINE LUBRICATION
held in suspension and, therefore, drain out more
completely.
a. Position drain receptacle under plug.
b. Remove drain plug using correct size wrench.
Be careful of hot oil.
c. Clean drain plug. Inspect and replace gasket if
deteriorated.
d. When oil has drained, replace and tighten
drain plug.
e. Check for presence of excess water in the oil
that might indicate an internal leak from the
cooling system.
B-8. Lubrication Fittings
Each 1000 miles [1.600 km.] clean each lubrication
fitting indicated by No. 1 on Lubrication Charts.
Use a pressure gun to lubricate. Be sure that grease
channels are open to provide complete lubrication
of bearing surfaces. In some cases it may be neces-
sary to replace the lubrication fitting. In extreme
cases it may be necessary to disassemble and clear
plugged channels. The following points have lubri-
cation fittings.
a. Remote control gearshift base (Models D]-3A
and some models Cj-2A only).
b. Tie rod: 4 fittings
c. Drag link (steering connecting rod): 2 fittings
d. Clutch pedal
e. Brake pedal
f. Steering bell crank
g. King pin: 4 fittings (Model DJ-3A only)
h. Transfer case shift lever shaft (All models ex-
cept Dj-3A)
i. Spring shackles and pivot bolts: See Par. B-9
j. Propeller shaft universal joints: See Par. B-10
k. Rear wheel bearings: See Par. B-14
B-9. Spring Shackles and Spring Pivot Bolts
• Models CJ-3B, C]-5, C]-6, D]-3A
All spring shackles and spring pivot bolts are shown
as item 2 on the Lubrication Charts for these
models, but some of these points will not have
lubrication fittings. Where there is no lubrication
fitting at one of these points, indicating a silent
bloc bushing has been installed, that point is not
to be lubricated. Where there are lubrication
fittings at the spring shackles or pivot bolts,
lubricate at each fitting with a pressure gun every
1000 miles [1.600 km.].
B-10. Propeller Shaft Universal Joints
The propeller shaft universal joints and slip joints
are equipped with lubrication fittings. These should
be lubricated with a good quality universal joint
or chassis grease each 1000 miles [1.600 km.] using
a hand compressor.
B.;11. Front Axle Shaft Universal Joints
and King Pin Bearings
All 4-wheel drive front axle shaft universal joints
and the front axle king pin bearings are enclosed
in the steering knuckle housings. Check the lubri-
cant level in the housings each 1000 miles [1.600
km.] to maintain it at fill plug level. Once each year
or at each 12,000 miles [19.200 km.] remove the
13

B
LUBRICATION
shafts. Thoroughly clean the universal joints and
housings and refill the housings with universal
joint lubricant. Use No. 1 for summer and No. 0
for winter.
B-·12. Steering Gear
Check the lubricant level in the steering gear hous-
ing at each 1000 miles [1.600 km.] to be sure that
the lubricant is at filler plug opening level. Should
lubricant be ::equired fill the housing slowly with
a hand compressor. Do not overlook replacing the
fill plug.
B-13. Front Wheel Bearings
Seasonally, 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 bearings
with wheel bearing grease. Work the grease into
the cage lwlding the rollers.
Follow this same procedure for wheel bearings
for 23-2 (full-floating) rear axle installed on early
CJ-2A Models.
B-14. Rear Wheel Bearings
The rear wheel bearings are equipped with lubri-
cation fittings with a vent opening through the
housings above each fitting. Lubricate each 1000
miles [1.600 km.J. Use a hand compressor and wheel
hearing grease, forcing the grease through each lu-
brication fitting until it flows from the vent. Vent
should be kept dear of obstruction or grease will
0ack up into the brakes. Do not add grease after
it flows from the vent for it may be forced through
the wheel keyway onto the outside of the wheel
and possibly onto the brake linings.
For Model CJ-2A "Nith 23-2 (full-floating) rear
:txle fD'.low the 1Jrocedure of Par. B-11 for removing
fc:nc n:packing the rear wheel bearings.
s-·i 5. :!~Speed "rransmission and
;-;--.?,:nsfer Case
11· Mcdels CJ-2A, CJ-3A, CJ-3B, CJ-5, C.T-5
."'!taietain ~ubrir:ant at f.H plug level }n both trans-
mi>:ston anu transfer case. Check !evei each 1000
m;!es p.600 km.] and add lubricant when necessary.
Drain and. refill both housings each 10,000 miles
i_:6.000 km.].
~Strvke eacn assembly individually even though
d.rilled. passages are provided in tb.e housings for
c:l circu1'Sltion nnd unit lubrication on all models
c::xcept CJ -?A before Serial No. 24i 96.
,:·i&rd s!1ifting of the gears in cold weather is a
:)ositive indication that the lubricant 1s too heavy
a g:rs.de or the quality al.lows it to congeal at the
prevailing temperature. If the oil is too heavy for
el:'.sy shifting it will not properly lubricate the
cl,Jsely fitted parts. Change the lubricant to a
iighter grade.
l1-16. 3-Speecl Transmission
o Model DJ-3A
l\1:aintain lubricant at fill plug level. Check level
each 1000 miles [1.600 km.] and add lubricant when
necessary. Drain and refill housing each 10,000
miles [16.000 km.j.
B-17. Optional 4-Speed Transmission
emd Transfer Case
• Models CJ-5 and CJ-6
The four-speed transmission and transfer case re-
quire separate lubrication for each unit as they
have no cross-over oil passage. At each transmission
~:ervice check, the fill plugs of both four-speed
transmission and transfer case should be pulled
and the lubricant refilled to level if necessary.
E!-18. Front and Rear Axle Differentials
Check the level in each unit every 1000 miles
[1.600 km.] to be sure that they are filled to the
level of the filler plug openings. Drain and refill
the housings every 10,000 miles [16.000 km.].
Do not mix different types of lubricants. Use a.
light engine or flushing oil to clean out the hous-
ings. Do not use water, steam, kerosene or gaso-
line for flushing.
B-19. Powr-!Lok Differential
Some vehicles are equipped with locking differentiai
{optional equipment). For identification of this
unit, see Par. N-15. Ordinary lubricants must
not be used in the locking differential. Use only
'Nillys Powr-Lok Differential Oil, Part No. 94557,
furnished in pint cans.
?owr-Lok differential may be cleaned only by
disassembling the unit and wiping with dean rags.
Do not flush the Powr-Lok unit.
3-20. Distributor
The distributor shaft is lubricated through an
oiler mounted en the side of the housing. Place
~hree cr four drops of light engine oil in the oiler
'~ach 1000 miles [1.600 km.j. Also place one drop
of light engine oil on the "vvick located on the top
cf the .shaft. which is made accessible by removing
Lhe rotor arm. Sparingly apply cam lubricant to the
ixeaker arm cam and place a drop of oil on the
!Jreake:r arm pivot.
::::"2~. \ieneratcr
Oilers .are provided at each end of the generator .
:Place two to four drops of light engine oll in each
oiler every 1000 miles !1.600 km.].
3-21A. Starting !1/lotor
'') i/Iodels CJ-2A (all) e.nd CJ-3A to S/N 30972.
_i,ubricate the starter with three to five drops of
<~ngine oil every 1000 miles !1.600 km.] at an oiler
iocated on the front (commutator) end.
3
7
or other ::nodels, see PaL B-36.
3-22. Oil Filter
After the initial change specified in Par. B-5, clean
the oil filter and replace the element at each 6000
miles [9.600 km.] of normal vehicle use. Oil filter
servicing should be performed at the same time
as one of the regular engine oil changes. At that
time be sure to add one quart [1 ltr.] to the engine
::::il change requirement.
B-23. Oil Bath Air Cleaner
~ Models CJ-3B, C]-5, CJ-6
a Optional on Model DJ -3A
These vehicles are equipped with an oil bath type

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
B
FIG. 18-0IL BATH AIR CLEANER
!-Horn
2-Flexible Connector
3-Hose Clamp
4-Body
5-Screw and Lockwasher
6-Clamp
'1-0il Cup
8-Clamp
9-Hose
10-Clamp
11--Gasket
air cleaner, Fig. 18. This type cleaner thoroughly
.removes all dust from the air before it enters the
carburetor. For efficient operation, the cleaner must
be serviced at regular intervals. Service the unit ac-
cording to conditions of vehicle operation.
Care of the air cleaner is extremely vital to the
life of the engine. Pay particular attention to the
amount of dust and dirt in the air taken into the
engine through the air cleaner. When dirt is not
noticeable in the air, service the air cleaner each
2000 miles [3.200 km.}. \Vhenever the air is notice-
ably dusty (for example when the vehicle is driven
on secondary roads. or through fields) then service
the air cleaner more frequently. Under extreme
continually dusty and dirty conditions where the
vehicle operates in clouds of dust and dirt, service
the air cleaner daily.
To service the air cleaner, unscrew the eye bolt on
the oil cuo clamp and remove the oil cup. Scrape
an dirt fr~m inside the oil cup and clean the inside
surface with cleaning solution. Refill with new oil
of the same viscosity as is recommended for the
engine crankcase to the oil level. bead and install
the cup securely to the cleaner body with the
attaching clamp.
Also, the air cleaner body (less oil cup) should be
removed from the vehicle and cleaned at weekly
intervals or oftener.
To do this, loosen hose clamp, and remove hose
from the cleaner.
Detach breather hose from the fitting on the
cleaner. Remove the two wing screws and lift
HI~.OIIJ
FIG. 19-WIRE GAUZE AIR CLEANER
cleaner from vehicle. Agitate the cleaner body
thoroughly in cleaning solution to clean the filtering
element. Dry element with air hose but do not
re-oil.
Install the cleaner body in the vehicle with the two
wing screws and attach hoses securely.
Carefully check the hose clamps and fittings on the
breather hoses at frequent intervals. Loose con-
nections will affect proper operation of the crank-
case ventilating system.
8~24. Wire Gauze Air Cleaner
'9 Model DJ-3A
The air cleaner furnished as standard equipment on
Model DJ-3A is the wire gauze type shown in Fig.
19. Dust particles in the air entering the air cleaner
are deposited on the oil wetted wire gauze. This
accumulated dust on the wire gauze mesh can
choke off the air supply to the carburetor if the
dement is not cleaned at regular intervals. It is
i:nportant, therefore, that the air cleaner be
serviced every 2000 miles [3.200 km.].
To iJervice the unit, first remove -the wing nut and
cover from the air cleaner. Then lift out the wire
gauze element and wash out the accumulated dust
by plunging the element up and down in a container
filled with dean solvent. Allow the element to
&.ir dry; use of compressed air for drying the element
is not recommended. Inspect the element and the
felt seal in the cover. After the element is c!,ry, dip
it in engine oil of the same grade used for the oil
change. Allow the excess oil to drain. "\Nipe the
inside of the housing and cover clean. In&ta11 the
element and cover. 'J.'ighten the wing nut securely.
8~25. Exhaust Manifold Heat Control \l~lve
·• Models CJ-2A, CJ-3A, DJ-3A
These models are equipped with a 4-cylinder
L-head engine which incorporates an ~:;xhaust
manifold heat control valve. Lubricate the valve
sh~Jt and bushings at each 1000-mile lubrication.
Place a few drops of penetrating oil at eac:1 end of
the shaft where it passes through the r.1anifold.
Then move the valve up and down a few times to
work the oil into the bushing.
15

B
LUB:RICATION
B-26. Speedometer Cable
Remove the speedometer cable from the tube
every 12,000 miles [19.200 km.]. Clean it thoroughly
and coat it with a good quality light graphite
grease.
B-27. Flexible Controls- Choke, Throttle,
Hand Brake
Each 12,000 miles [19.200 km.] or once a year oil
the exterior surfaces of the flexible control conduits
with penetrating oil. This will usually maintain
smooth operation with minimum wear. Should the
hand brake control cable require additional lubri-
cation, remove it from the conduit and coat it
with light graphite grease.
B-28. Clutch Linkage
Lubricate all friction points of the clutch linkage
every 1000 miles [1.600 km.]. Use the same grade
of engine oil as used for the engine. Failure to lubri-
cate these points will result in premature wear; the
links will wear and the holes in the mating parts will
become elongated.
B-29. Body
Often attention is not given to the proper lubrica-
tion of the body hardware. However, when this is
done it should be called to the owner's attention
to avoid soiled clothing. A few drops of oil should
be placed on the tail gate and hood hinges. The
hood catch, hand brake ratchet, cowl ventilator
control, and hood prop should be oiled for easy
operation.
B-30. ADDITIONAL PERIODIC SERVICES
B-31. Brake Master Cylinder
Check the fluid level in the brake master cylinder
every 1000 miles [1.600 km.]. Wipe clean the top
of the filler cap and also the housing area around it.
Replenish the brake fluid to a level Y2" [1 ,3 em.]
below
the top of the fill hole. Use only heavy-duty
brake fluid conforming to specification SAE-70-R3.
Be sure to handle the brake fluid in clean dispensers
and containers that will not introduce even the
slightest amount of other liquids. Replace and
tighten the filler cap.
B-32. Radiator
The exterior of the radiator core should be cleaned
and the radiator inspected for leaks each 1000
miles [1.600 km.] of normal service of the vehicle.
If the vehicle is subjected to considerable off-the-
road operation, this interval should be each 1000
miles or 30 days, whichever interval occurs first.
Refer to Par. H-6.
B-33. Cooling System
The cooling system should be flushed twice a year
and checked for leaks, preferably in the spring and
fall at the time of changing the antifreeze. Refer
to Par. H-1.
B-34. PARTS REQUIRING NO
LUBRICATION
B-35. Water Pump Bearing
1
Clutch Release Bearing
The water pump and clutch release bearings are
16
prelubricated for life when manufactured and
cannot be relubricated.
B-36. Starting Motor Bearings
e Models CJ-3A S/N 30972 and on, CJ-3B, CJ-5.
CJ-6, DJ-3A .
The starting motor bearings are lubricated at
assembly to last between normal rebuild Jlleriods,
For other models, see Par. B-21A.
B-37. Springs
The vehicle springs should not be lubricated. At
assembly theleaves are coated with a long lasting
special lubricant which is designed to last the life,
of the springs.
B-38. Shock Absorbers
Hydraulic direct-action shock absorbers are per-
manently sealed and require no periodic lubrica-
tion service. Also the shock absorber mounting
bushings are not to be lubricated.
B-39. LUBRICATION REQUIREMENTS FOR
FIELD AND INDUSTRIAL USE
Adequate lubrication becomes increasingly im--
portant when vehicles are used in field or industrial
work and in many types of off-highway operation,
for under these conditions all operating parts of
both the engine and chassis are subjected to un-
usual pressures. At the same time such operation
is 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.
B-40. Engine Oil
Use only a nationally advertised brand of MS type-
oil.
No definite change interval can be recommended
due to the great variety of uses and conditions of
use. It is important, however, that the oil in a new
or rebuilt engine be changed at the first eight or
ten hours of operation and for heavy, dusty work,
every fifty hours thereafter. Do not fail to watch
the condition of the oil closely and should it be-
come contaminated, change it immediately.
B-41. Chassis Lubrication
The period of lubrication depends entirely upon_
the type of work being done. Using the specified
interval of 1000 miles [1.600 km.] recommended
for highway travel as a guide, lubricate at safe-
intervals required for the type of operation being
done. Under the usually extremely dusty conditions.
of field work lubricate these points daily.
Be sure to force enough lubricant into each fitting
to force out the old lubricant which might be
contaminated with grit and which would cause-
rapid wear if allowed to remain.
Do not place lubricant on the various ball and
socket 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 clean with a_
cloth.
B-42. Oil Filter
Dismantle and clean the filter and replace the-
element at the end of the first 100 hours of service.

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
B
Usually element replacement at each 150 hours of
additional service will provide satisfactory filter-
ing, however,
under extreme conditions this may
not be true. The condition of the oil·will indicate
the condition of the filter element; Should the oil
quickly become discolored aud show evidence of
contamination, change the element without delay.
B-43. Air Cleaner
The care of the air cleaner is extremely important
at all times but especially s:> when the vehicle
is
used for industrial or field work.
When operation is under dusty conditions, clean
and refill the cleaner reservoir to the full mark
daily and under e'xtreme conditions twice daily.
When . servicing the unit, use a suitable tool to
dislodge dirt clinging to the bottom and sides of
the intake passage within the body of the cleaner.
B-44. Front Axle Shaft Universal Joints
The front axle steering knuckle pivot pins (king
pins) are supported in housings at each end of the
front axle which also enclose the front axle shaft
universal joints.
Maintain the lubricant level in the housings even
with the filler plug openings at all times. For field
or industrial use remove the universal joints twice
yearly, thoroughly clean both the housings and
joints with a suitable solvent and refill the housings
to the filler plug opening levels with the correct
lubricant as shown in the appropriate Lubrication
Specification Chart.
B-45. Transmission and Transfer Case
The combined capacity of the two housings is
small for economy, making it important that the
lubricant be changed at regular intervals.
For heavy duty farm or industrial work, drain
both housings every 300 hours of operation and re-
fill
to the filler plug opening levels.
B-46. Front and Rear Axle Differentials
Because of the higher pressures developed in the
axle assemblies with heavy-duty operation drain,
flush, and refill the differential assemblies each 300
hours of operation. Use only flushing oil or light
engine oil to clean out the housings (except Powr-
Lok differentials).
B-47. Power Take-Off and Pulley Drive
Check the lubrication level each time the vehicle
is
lubricated to be sure that the housings are filled
to filler opening levels. Should the units be used
often drain and refill the housings each 300 hours
of operation.
B-48. Power Take-Off Propeller Shaft
Universal Joints
For average use the original factory lubrication
will last the life of the vehicle. Should the power
take-off be used often, however, for long periods of
time, disassemble and repack the joints once each
year.
When repacking, guard against overfilling for
hydraulic action may damage the boots. The
capacity of each joint is one fluid ounce.
B-49. Centrifugal Governor
Check the oil level in the governor housing at each
vehicle lubrication. Use the same seasonal grade
oil as is used in the engine and change oil at each
engine oil change. Do not fill the housing above
the level indicating plug opening. Keep the vent
in the filler plug open at all times.
B-50. Hydraulic Lift Lubrication
For lubrication requirements for the Monroe
Hydraulic Lift, refer to Sec. U.
17

'Jeep' UNIVERSAL and 'Jeep' DISPATCHER
c
ENGINE TUNE-UP
Contents
SUBJECT PAR.
Air Cleaner. . . . . . . . . . . . . .......... C-12
Battery. . . . . . . . . . . . . . . . . . . . . ........... C-2
Carburetor.... . . . . . . . . . . . . . . ......... C-16
Compression ............................. C-7
Crankcase Ventilation ..................... C-5
Cylinder Head ........................... C-4
Distributor .............................. C-9
Fuel Pump ............................... C-14
C-1. GENERAL
An engine tune-up should be performed each 6,000
miles [9.600 km.], or at the end of each 250 hours
of off-the-road use, to restore performance and
power lost through wear and deterioration resulting
from vehicle use. The tune-up should follow the
sequence given below. Correction of items affecting
the fuel system should not be attempted until
all items affecting compression and ignition have
been satisfactorily checked and any problems
corrected.
C-2 Clean and Check Battery
Inspect battery and cables. If the battery is not
satisfactory, install a fully-charged battery to
allow completion of the tune-up.
a. Check the specific gravity of the electrolyte in
each cell of the battery. A hydrometer reading of
1.260 indicates that the battery is fully charged.
If the reading is 1.225 or below, the battery needs
recharging. If one or more cells is 25 "points"
(.025) or more lower than the other cells, this in-
dicates that the cell is shorted, the cell is about to
fail, or there is a crack in the battery partition in
the case. Unless the battery is repaired or replaced,
battery trouble will soon be experienced.
b. Check the electrolyte level in each cell, add
distilled water to maintain the solution %" [9.5
mm.] above the plates. Avoid overfilling. Replace
the filler caps and tighten securely. It is important
to keep the electrolyte level above the plates at all
times because plates that are exposed for any
length of time will be seriously damaged.
c. Check the wing nuts on the hold-down frame
for tightness. Tighten them only with finger pres-
sure, never with pliers or a wrench. Excessive
pressure could damage the battery case.
d. Clean the battery terminals and cable con-
nectors. Prepa,re a strong solution of baking soda
and water anal brush it around the terminals to
remove any corrosion that is present. The cell caps
must be tight and their vents sealed to prevent
cleaning solution entering the cells. After cleaning,
coat the terminals with heavy grease.
e. Inspect the battery cables and replace if badly
SUBJECT PAR.
Fuel Supply .............................. C-13
Heat Control Valve ....................... C-6
Ignition ............................ C-10, C-11
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . .C-19
Spark Plugs .............................. C-3
Tune-Up Specifications .................... C-20
Vacuum ................................. C-15
Valve Adjustment ........................ C-8
corroded or frayed. Check tightness of terminal
screws to ensure good electrical connections. Check
the tightness of the negative ground cable co 1-
nection at the frame to ensure a good ground
connection.
f. Load test the battery. Connect a voltmeter
across the battery. Run the starting motor for
15 seconds. If the voltage does not drop below 5
volts on a 6-volt battery, or 10 volts on a 12-volt
battery, the battery is satisfactory. If the voltage
falls below the figures given, yet the specific
gravity is above 1.225, the condition of the battery
is questionable.
g. Be sure the engine ground strap connection,
Fig. 20, is tight at both connections. If these
connections are loose or dirty, hard starting or
failure to start may result.
FIG. 20-ENGINE GROUND STRAP
C-3. Clean and Adjust Spark Plugs
Clean, inspect, and gap spark plugs. Do not install
spark plugs until completion of compression tests.
a. Using a spark plug wrench, loosen each spark
plug one or two turns to break loose any carbon
deposits on the plug base.
b. Blow out all carbon and dirt from each spark
19