Jeep UNIVERSAL CJ-5 User manual

Jeen
UNIVERSAL
Ourt
,o/..lmnxrrta/."
MODEL CJ.5
MODEL CJ.6

Y-
Jeep.
UNIVERSAL
4.WHEEIDRIVE
Model CJ-5
ModelCJ-6
Owner's Mqnusl
Willys Mofors, Inc.
lotEDol, oHto,u.5.A,
FomOM-1002-R3
Copyrighr
1960
Pdnr.dinu.s.a.
\-

.JEEP' UNIVERSAL
MODEL CJ.5
Dear OwnerI
Welcome to the family oI satisfied 'Jeep' vehicle owners. We
pl€dge ours€lwes to serve you with satisfaction as we have the
many thousands of other Willys owners throughout our fifty-
Your 'Jeep' vehicle has beenthorcughly tested and inspected
to ensurethat p.operly maintained it will give you many miles
of satisfactory service. Your Willys 'Jeep' dealei is interested in
you. continued satisfaction and will be glad to cooperate with
you in providine the piope. maiotenance for your 'Jeep'vehicle.
You will receive f.om your dealer an Owner's Se.vice Policy
which has a 1000-mile InspectioD Coupon attached, and an
Owner's Identifrcation Card.
Read your Owner's S€rvice Policy caietully and completely.
It desdibes the services which your Willys 'Jeep' dealer will
furnish as part of his salescontract with you. Ask your deal€r
to explain any points that arc not clear to you.
Have you. dealer filI out both your Owner's ldentification
Card and also the 1000-mileInspection Coupon.
Our fi.st gesture of service is this owner's manual. Readit
carefully so that you will be familiar with the instruments,
controls, and corect operation of you! 'Jeep' vehicle.
v;
.JEEP' UNTVERSAL
MODEL CJ.6

IABTEO] CONTENTS
MANUFACTURER'S
WARRANTY Page
4
MANUFACIURER'S
WARRANTY
The only Warranty under which new Willys Motor Vehicles are
sold is that of the Manufacturer, being the Standard Waranty
recommended by the Autooobile Manufacturer's Association, and
"This isto certify that we,WILLYS MoToRS,INc ,TOLEDO,
OHIO, U.S.A. warant each new motor vehicle manufactured
by us, to be fiee f.om defectsin material and workmanship under
normal use and seryice, our obligation under thjs Warranty
being timited 10 making good at our factory any part or parts
thereof, includine all equipment oi trade accessories
(excepttiles)
supplied by the vehicle manufactuler, which shall, within ninetv
(90) days after making delivery of such vehicle to the original
purchaser or before such vehicle has been driven'1000 miles
(6100 Km.), vhichevei event shall first occur, be returned to
us with transportation charees
prepaid, and which our examina-
tion shall disclose
to our satisfaction to have beenthus detective;
this warranty being er?lessly in lieu of all other var.anties ex-
pressed
or implied and of all othei obligations or liabilities on our
part, and we neither assumenor authorize any other person to
assumefo. us any other liability in connection with the sale of
our vehicles. This warranly shall not apply to aDy vebicle which
shau have been .epaired or altered outside of an Authorized
Willys ServiceStation in any way so as, in the judgment of the
Manufacturer. to affect its stability or reliability, nor which has
been subject to oisuse, neslisenceor accid€nt."
The Manufacturer makes no warranty against, nor assumes anv
liability for any defect in metal or other material in any part, device
or trade accessorywhich cannot be discow€red
by ordinarv factorv
WILLYS MOTORS, INC'
NOTE -Willys Motors, Inc., reserves the right at any time or
times to revise, modify, discontinu€ o! change any models of its
vehicles, or any part or parts thereof, without notice; and, without
it or the Selle!, incurriDg any liability or obligation to the Purctraser.
SPECIFICATIONS
. .. 6
GETTINGACQUAINTEDWITHYOUR
rJeepr
VEHICIE
GENERALINFORMATION.. ...,. , 7
INSTRUMENTS. ........9
SWITCHES
AND CONTROLS..
.
.... .. ......11
OPERATINGYOUR'Jeep' VEHICLE
BREAK IN. 13
DRIVINGTHE 'JEEP' VEHICLE.......,, 13
OPERATION
OF4-WHEELDRIVE:
r...... .....
..16
DRIVING TECHNIQUESIN 4-WHEELDRItrE.. ..19
tUBRICATINGYOUR'Jeep' VEHICLE
ENGINELUBRICATION.:.
.... 22
LUBRICATIONCHART........, 23
SERVICEMILEAGECHART....... .29
MAINTAININC
YOUR'Jeep' VEHICIE
POWERPLANT..... 30
cooLING SYSTEM..,..... 35
38
WIRINGDIAGRAM,..... 39
FUEL SYSTEM..
.
-
......... .....4s
DRIVING COMPONENTS... ,. .47
EXTRA EQUIPMENT.,. ..,.. ., .64
EMERGENCY CHART..... .. .. ......... ....7s
'Jeeo' APPROVED SPECIAL
EOU|PMENI...........i7
ELECTRICAL SYSTEM.
.,

SPECIFICATIONS GETTING
ACQUAINTEDWITH YOUR
IJEEP'
VEHICLE
Tyte
Number ol C) iinders
Bore.
Strolre
PistonDisphcem€nt
Compr€ssion
Ratio:
Standard
High Altitude (opt.l
Compr*ion Pressure.
Ho.sepower
(BraLeat 4000 rpn.) . .
Hors€power
(sAE) .. . ..
Torqle (Maximuh at 2000.pr.)
cJ.6
Fuel Tank
Withont heat€r
With h€ater.
GENERAI.
INFORMATION
The follovins pases, divided into four s€ctions, contain informa'
tion about your 'Jeep' vehicle.
The first section vill acquaibt you with specificalions, model
designationsand serial numbers, instruments, and conlrols.
The second section describes proper operation includins thc all
important break in period.
The thi.d section coverslublicating proc€dur€sand recommenda-
tions asvell asperiodic setricins requilements. -
The fourth section explains the function of your 'Jeep' vehicle's
syst€ms and components and also des$ib€s minor adjustments and
minor oaintenance procedurcs.
Prope. lubiication is most impo.tant. Your rJeep'vehicle should be
lub cated at the r€commended frequencies
with the corftct srades
of lubricants, as given in the third section,to maintain it in first class
condition. You should periodically have it lub.icated and inspected
at an Autho.ized Willys Dealer's S€rviceDepartment.
When ext€nsive adjustments and lepai.s se€mnecessary,
have the
vork peiformed by a competent automotive repair techniciar. At
your Authorized Willys Dealer's Service Depa.tment the service
techniciaDsa.e familiar wjth your 'Jeep' vehicle aDd with all factory
.epair recommendations.
All the information given in this owDer'snanual consistsof factory
recommendations that should be used as a guide lor prop€rly operat,
iDg and se.vicing your'Jeep' vehicle.
3\"
1\'
.72
r5_63 72 15,63
al'
101"
43\6'
67"
l3srj'
r55r'
7r%'
U.S,
\at1sat.
cJs cJ6
cross v€hicle weisht (GWVI:
Weights approximat€:
Siip?ing
Curb
For.anvas half top model, ddd
For canvas full-top mod€I, add
For hard top model, add.
2163 2223
3 t7
21
ga1
1031
t7
151

VEHICTE
5ERIATNUMBER
ENGINE
SERIAI
NUMBER
KEYS
ANDtOCKs
INSTRUMENTS
The vehicle serial number is
stamped on a metal Plate. This
plate is located on the dash under
the hood on the Ieft side of the
vehicle. Model CJ's will have a
Drefix 57548 followed bY a five-
dieit serial number. The prefix for
Model CJ-6 is 57748.
For examPle:
575,18-00000.
For ready rcIe.ence,recoid Yo'lr
vehicle serial number here: I
The opelational instruments are
conveniently grouped where they
can be easily seen on the instru
nent panel.Each olthe gauges
ard
warnine lights indicates a critical
function of the vehicle and warns,
inadvance, when somethingserious
is soins wro11g.KnowiDg .he func-
lion of these gaug€s and warnnrg
lights and observing them oc
casionalty while d.iving or while
the engine is running can prevent
breakdowns and exp€nsiverepairs.
6
7
The eneine serial number ls
stamDed on the water PumP Do3s
at tde front of the eneine The
F4.134eneineused;n
both
models
will hava a Drefix 4J followed
by a sii'dieit s;rial number,thus:
4J-000000.
For ready
reference,
record
Your
enginesedal number here:
SPEEDOMETER
The speedom€ter sweep hand cumulated mitease travelled. The
irdicat€s vehicle speedin miles per right handnumeral of the odometer
hour. The odometer registers ac indicates tenths of a mile.
When you receive the keys to
your new JeeP'Veh;cle record the
key number. and Put Lt rn a sare
convenient Place. If Your --keys
.hould become lost, lrour 'JeeP
vehicle dealer or any comPetent
locksmith can rcPlace the keys
from this number.
,.OIL" WARNING LIGHT
A rubl red lamp will light to
indicate when the e.sine oil is not
b€ingpumped at sumcient pressure
to reach the places that oeedlubri
cation. When the ienition key is
turned on but the engine is not
running, or when the ensine is
running at idle speed, this light
\till shov red without neanins
anything iswrong. Ifit lights when
the ensine is running above idle
sp€ed, shut the eDeine oF im,
mediately, for it isnot beirs lubri-
cated and will burn itself out in a
FIG. 1 INSTRUMENTS

A ruby-red lamp will light to
indicate that for some reason the
gen€rato. is not properly recharg'
ing the battery. When the ignition
key is turned or1but the engine is
not runnine, or vhen the engine is
.unnine at idle speed,
this light will
show red without meaning any
.FUEL"
This eause indicates how much
fuel is in the fuel tank. The pointer
will drop back to LheE (emPty)
mark when the tenit;on switch js
turned off. It may take a moment
..AMP" WARNING LIGHT
.TEMP" GAUGE
TURN SIGNAL INDICATOR
thing iswrong. Ilit lights when th€
engrne
isrunningabove
idlesPeed,
have the charei'rg
ci.cuit checked
as soon as Possible
o. the battery
will soo! so dead. If this light
comeson and stays on while driv-
ins, promptly detelmine and cor-
rect the failure.
GAUGE
for the gauge to .ecord when the
isnition switch is again turned on
The point€r may fluctuate without
meanins anything is wrone as the
vehicle isdriven over roughterrar.
SWITCHES
AND CONTROI.S
FIO. 2-VEHICLE CONTROLS
The temDeratufe gaugeregisters
the tempeEture of the solution in
the cooling svstem. If the needle
of the gauge swings far itto the
H (hot) zone, it rneansthe engrne
is running dangerously hot and
may soon quit. Stop and 'nvestl
gate. The usual causeof overtreat
ing is that some of the water or
antifreeze in the radiator has
€vaporated or leaked out through
a broken radiator or heater hose.
If the "amp" warning lieht comes
on at the sametime, it may mean
the fan bett has broken. Whateve.
the trouble is, don't drive on until
it has been corrected or the engine
CAUTION. Always remove the
.adiator cap slowly to avoid Possi
ble i.jury from escapins steam or
hot water. Never add water when
the engine has overheated; allow
the engine to cool first.
TGNITION AND
The ignition and starting motor
switchar€ integral.
This switchis
located on the dash, below ard to
the.ight of theinstrument
cluster.
Turn the key to the extreme
right (clockwise) to connectthe
ignition and oank the eDsine.
Whenthe
enginestarts,iDmediate-
ly releasethe key as it is spring
loadedto automaticallyr€turn to
HEADLIGHT BEAM IND]CATOR
A ruby'red light glows wher the driwers. When the dimmer switch
headlishis
sre on tictt U..m a"d is push"d on"e rhe headlishls\^.ill
warns that your lights may be ssrl'h ha'k o low oPam
anc rn'
shiline inro itr. eves
or oncon.;ng indrcaro' lishl urll eo off
STARTER SWITCH
the "on" position. Avoid tuoing
the key to the "start" positioD
rvhen the engi.e is runnine.
To supply electric curent from
the batte.y to operate the heater
and othe. accessories when the
engine is not running, turn the
key to the ext.eDe teft (counter
clockwise) position.
The tuln sisnal indicator switch
is locat€d on the steering colum!
The up position of the switch lever
sisnals
a right turn; thedo$n Pos'
ti;n sienals a left turn When a
tu.n is sienalled, the green lieht
will flash. wlren the turn is com
Dleted and the vehicle is a8air,
;oins straiqht ahead. the seli
i"ncitLi"g s''tcr' will tu.n off the
lights as the iever automatically
snaps back to centered Position

LIGHT SWITCH
SHIFT LE\,ERS
HAND BRAKE
HEATER CONTROLS
OPER,ATINGYOUR &GP VEHICIE
PROPER,
BREAK
- IN
The "$hiftins pattem" of the
ta$mission shift lever is shown
in figure 3 for the 3'speed trans.
missionandffgure4for the optional
4-speed transmission. S€e page 14
for operation of th€ transfer case
shiftine levers.
The Iielt switch, No. 4, is the
pluflge. type. When the control
knob is pushed in, no lights are ]it.
Pulling it out half way ope.ates
the parkinglights andall the way
out theheadlights.Theinstrument
cluster light is on when either the
parking lights or the headlights are 50
mph. I80
kph.l.300to 800 mil€s
[1300
km.l
60oph. [95 L?h.l800to 1200miles
[2000
km.]
The cmnkcase is filled at the
facto.y with oil of the proper
viscosity for the "break-in" p€riod.
This special oil should be drained
at s00miles
[800
kh.] andrcplaced
with engine oil of the vismsity
recommended in the Lubrication
Section.
During thefrrst1000miles
U600
km.l of operation be alert for any
indication of overheatins in any
component of the vehicle.
. Give the vehicle a cohplete
lubrication covering all the items
. See that all lires have the
. Should the engine fail to start
at once,pull the choke all tlle wqy
By takine a few reasonablepre
cautions during the first few miles
of driviDg and by siving your
vehicle an opportunitv to properly
"break in", operatio! and life of
the wo.king parts of your '{Jeep'
vehicle will be greatly ioproved.
The parts of your new 'Jeep'
vehicl€ ale precision fitted. Close
limits are maintained th.oughout.
Therefore certain speed limits
should be observed to "break in"
The manually operated brake
control is located uDder the edse
of the instrument panel to the left
of the steering column. To set the
hand brake first depress the foot
brak€, then pull out on the hand
brake control handle. Turn the
handle slightly and push it in to warm uP, do not
Check all controls for ftee op-
eration and turn air control knob
for ch€cking blower control speeds.
Thc air control knob whe' pulled
atl the way out, givesthe maximum
air travel thrcugh the heater coils
andthe amount of heat depends
on
how far the (l€ft knob) tempera-
ture control k pulled out. To in-
crease the air flow heat output,
tum the ai. cont.ol (center
knob)
which controlsthe blower speeds.
Onenotch to the right for low speed
and second notch for high speed.
Pulline out defrcstff control
(right knob) direcb warm air
throush the two deto€ters to the
wiDdshield.For Su'n'ler DrieirC
-Pull out air control (cent€t
krob) only half way for maximum
freshair to driver's compartmert.
a0Dph. [6s
lah.l.
. Fill th€ radiato..
. Put sasoline in the tank.
the fille. pipe until the oil indicator
placingthe shift lever, No. 7, in
th€ forward position.
. Fill the oil reservoirtlroush in theLubrication Sectior.
Be sure to have your 'Jeer"
vehrcle dealer irspecr your 'Jeep
.0to300miles vehicle at the end of 1000 miles
[s00
km.] 11.600
km.l
usaee.
CARBON
MONOXIDE
Carbon monoxide isa deadly sas. ensine in a ctosed garage. Always
lr hrs no odor. no laste. no color. open the doors $ide befde starti;g
It is iD the exlaust fumes of all the engi'e. Keep then open wide a;
gasoline engines. Never sta.t an lons as the eneine is runnins.
OPERATION
MAKING THE !'EHICLE READY
stickregisteis
FULL. See Lubrica p.operpressure.
SeeTi.e Pressure.
STARTING THE ENGINE
. Put the fansmission searshift lock, No. 5, and turD it to the
lever, Fie. 2, No. 14, in neutal. right, closinsthe ignition circuit.
Place the transfer case low and . Tu.n the isnition key ,,hard
high shifr lever. No. 8. ;n direcl richr" and hotdit therero opdate
gear or in lhe rear position and lhe starter, Release
pressure
on
disen8agethe fronr axle drive by keywhenengine
starts'.
. Pull the choke cont.ol one- out and again press tie starting
fourth of the way out. This will switch. When the engine starts,
also open the thiottle sfigntly. set the choke control at the best
. Place the key in the isnition operating po6ition and as the en-

ginc warms up, push thc choke all
the way in. Do not run with the
choke out as fuel is wasted and
STARTING THE VEHICLE
. Releasethe hand bmke, if set.
. Dcpress the clutch pedal.
. Move the transmission sear
shift leve. to th€ first position. See
figues 3 and 4. (Note that the
front axte and traosfer case shift
levers are not uscd when the
vchicle is driv€n on the hishway
in rcar wheel drive.)
. D.press the foot acccleratoi
pcdal gradually and at the same
timc slowly relcase the clutch
pcdal.
. Allolr the vehicle to gain mo-
mcrtum (two or thrce v€hicle
lcngth!), ther rel€ase the accelera-
tor and depr€ss the clutch pedal
atlhe-same moment.
. Mo!€ tne shift lever p.omptly
to thc ncxt higher speed position.
DcFcss the foot accele.ator pedal
gredually and at the same time
llowly release the clutch pedal.
. Shift to 'tigh" speed in tlle
ramc way at about 18 to 20 mph
(29-32 tm./ttr.), releasins the ac'
cclerato! and depressing the clutch
pedal before moving the shift lever.
the engine fouled.
. Should the engine fail to start,
see
th€ Emergeocy Chart.
FIC. 3-SIIIFT PATTERN
3.SPEED ARANSMISSION
*.ee
^dd
d
FtG 4 -SHIFA PAAAERN
OPTIONA! 4 SPEED ARANSMISSION
. It will be found advisable to
make this chanee when the engine
's placedunder heavy pull or when
dropping down to a very low spe€d,
as when traveling up a steep grade
in s.andor in congestcd tra6c.
. Never attempt to make thc
change with the wehiclc travcling
at a high rate of sp€€d.
. With the vehicle at a staDdstill.
deFess the clutch pedal.
. Shift the gearshift lever into
the reverse position, and stowty re-
REVERSING THE VEHICLE
TOWING THE !'EHICLE
lease
the clutch pedal and regulate
the vehicle speed with the foot ac
The vehicle may be towed for-
ward in the normal mannerwithout
dMage to the fou. wheel drive
mechanism. The gearc in both the
transmissioD and transfer case
must be in their neutral positions.
Should it be necessary however,
to lift the .ear wheets and tow rhe
vehicle in reverse, be sure to !€,
move the front axle shaft driving
tlanges to prevent the flont dif,
ferential from rotatins.
Should the drivine nanges b€
femoved, a cover should be lm,
provised to prevent dirt from
entering the wheel bearings.
STEERING KNUCKLE OIL SEAL
After driving in wet, f.eezing
weather, swirg the front wheels
from side to side to wipe the
moistu.e otr the seals and the
spherical
surfaces
of the steerins
knuckle
housings.
Thiswilt prevent
the formation of ice which might
damase
the knuckleoil seals.
STOPPING THE VEHICLE
. Rcleasethe foot accelerator.
. Appty t1lefoot brake until the
vehiclc is nearly at a sta.dstill
and thm depressthe clutch pedal.
Th€ practic€ of appltns the brakes
intermittently ratler tlan with
coDstant pressu.e will result in
reduc€d brake linine wear as lcss
. When stopped, move gearshift
lever into neutral.
. S€t the hand brake and release
the clutch and b.ake pedats.
CHANGING TO LOWER SPEED
. Depress the clutch pedal.
. Mov€ the gearshift lcwer quick- creasing th€ engiDe speed slightly
if t.aveling on tevel road, and r€-
lease the clutch pedal.
ly into the ncxt lower speed, in-

To shilt frcrn 4-wheel-drive
to 2-whael-drive let up on the
acc€lerator,
ifth€ vehicleismoving,
and move the front'axle drive lever
to the forwa.d (out) Position. The
auxiliary-range levei must be in
hish (rear) position before the
front axle drive can be disensased
-'?o*-
'"o
I
o',""
WHEN TO USE 4'WHEEL DRI\E
10032
gear. Use 4 wh€el drive otr the
road when vou need it. Use it in
$ow. Us€ it to get heavy trailers
rolling and for pullins agricultural
imptements. Use it on ice, hitts,
mud, sand, and wherever normal
2 wheel-drivc traction won't do the
job.
4.WHEEL DRI\E
of torsional stress iD the drive
train and results from normal
variatioDs in tirc diameterc uoder
differeDt load conditions.
To rclieve tnis buitd-up, simply
drive the vehicle in reverse for
several feet or dfive otr the hard
su ace Domentarily to allow the
Shift to 4-wheel diive, hish
range,first gea.wheD goine
throush
mud, snow, and sand without a
load. Auxiliary low rans€ is not
necessary
in such conditions unless
a load is being pulled by the
vehicle or unless it is desired to
proceed more slowly because of
changins road coDditions. Don't
shift into aDy lower gear than is
necessary to oaintain headway.
Try to kcep a constant ensine
speed. Over rewing the engine
will cause the wheels to sta.t
A'Jeep'vehicle may on occasion
be driven up to the hubs in sand,
mud, oi water. As sooDas possible
thereafter. clean the b.ake drums
o,rr.)
a\,"*
,"-
6
a*"
Use 4-wheel drive to Provide
additional traction and lowe. sear
ing for difficult terrain and to
provide low speed Pulling Power
fo. industrial and asricultural us€.
You should only use 4-wheel drive
when greater traction and Power
are required than can be Provided
by the standa.d transmission low
WI{EN NOT TO USE
For normal drivins on hard-
surfaced .oads, 4-wheel drive
should not be used.The additional
tractive effort it P.ovides is not
needed under such conditions Pro
longed use of 4'wheel drive on
ha.d-surfaced roads may occasion-
ally caus€ temporary difficulty in
shiftins out of 4 wheel d we.This
condition is caus€d by a build-uP ."Q?--
*oQ
o"*"
UP HI
Shift to 4-wheel d.ive, low range,
second sea.. Drop dow! to first
g€ar only when it is apparent that
tie st€cpnessofthe asc€ntrequires
the lowe. sear to maintain head-
Apply power smoothly. Don't
lose traction by ovei-rewing tle
ensine.ID certain conditions,head-
way can be maintained by using
a mitd pumpins action on the ac
c€lerator. This action produces
"Walk" the vehicle up the last
few feet. If the whecls start to slip
with only a few feet of the ascent
remaining, headway may be main-
tain€d by swinging the front wheels
DRIVING
TECHNIQUES
IN 4.WHEEI.
DRIVE
THROUGH MUD, SNOW. AND SAND
10033
sDinning and traction will be lost.
Tire p.essure may be reduc€d to
about l0 psi. il additional flotation
CAUTION THROUGH SAND, MUD, OR WATER
to prev€nt any abrasive material
that may have eDteredfrom wear
ing the brake linings.
LL
9?
l-o-l
dd
10034
ergine speeds slightly above and
below t}le vehicle speed and gives
GETTING OVER THE HUMP
sharply left aDd .isht. This will
provide a fresh "bite" into the su.-
face and witt usually result in
enough traction to comPlete the
climb.

IF YOU
Ifthe vehiclestallsor loses
head-
way when climbing a steeP hi[,
male a fast shift to reverse or first
gear. Dont depress the clutch
Ensine compression wiu hold the
vehicle on the hill. Don't try to
back dowr with the clutch released
and only the brakes holdins the
vehicle. By shifting into reverse
you can start the engire without
depressing the clutch- Let the
vehicle moved backwards with the
starte!. WheD the el}gine starts
DOWN
Shift to,1 wheeldrive, low ranse.
6rst gear. Don't use the clutchl
Don't use the brakes! Your 4
wheel drive vehicl€ can Proceedin
safety down a srade whicb could
lot be negotiated safely by a
conventional 2 wheel drive vehicle
Shift to low ranse, first sea. and
let the vehicle so slowly down the
hiu with all fou. wheels turnins
agaiost engine compression. This
STALL
??
ro-1
oo
HILL
9?
tG
Jd
LUBRICATING
YOUR
JEED
VEHICLE
10036
you can control your downwarcl
speed
with the accetetator,
1003t
will permit you to control the
vehicle's speedand direction.
with the possibilityof tiPPing.
When necessarv,
choose
asmild
an anele
as
Possible,
keepmoving,
andmake
your tums quickly.
WE REPEAT'-DON'T TRAV-
EL DIAGONALLY ACROSS A
HILL UNLESS ABSOLUTELY
NECESSARY.
common sense and caution Don't
tak€ unnecessary risks and don't
attemPt the imPo€sible.
Knowledee of your vehicle and
its abilities is you! best insurance
Know your vehicle; use it viselyi
andyou will enjoy safe,
economicat'
and faithful service.
Regular application of high-
srade lubricants when operating
your 'Jeep' vehicle is especiallyim
portant because of the diversined
tl.pe of service it perfo.ms. The
amount of trouble free service you
.eceivewill be in proportion to the
careeiven. The t].pe of seNice per-
foroed determines the frequency
The following pages give the
iocation ard fr€quency of lubrica-
tion, and the grade and quality of
lubricait required for all parts of
I our rJeep'
vehicle. The mileagein
structions should be followed when
the vehicle is used for road work.
The hou.ly instructions, which are
oDly approrimate, should be used
wheDthe vehicle is usedfor field or
industrial work. It is impossible to
give accurate hourly instluctions
because of the diversified service
aDd conditions unde. which the
vehicle may be operated.
Good judgment must be used
for frequency of lubrication accord
iog to the type and conditions of
the work beins performed. As an
example when used as a farm
tractor unde. dusty conditions, the
chassis should be lubdcated daily
asthe new lubricant fotces grit and
dirt, which has accumulated dur
ing the day, from the bearing su.-
faces. Under these conditions, the
air creare. should also be cleaned
and refilled daily or, under extreme
conditions, twice daily.
Because of the importance of
lubrication, detailed recommenda
tions are given in the paragraphs
followine.
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WARNING - ACROSSSLOPES
Avoid this situation! Your 'JeeP'
vehicle wiII seldoo encounte. a
hill which it cannot nesotiate
directly. However, natural ob-
stacles may make it necessary to
travel diagonally uP or down the
hill. The danger lies in losing
traction and slipPing sideways
SAFETY AND 4'WHEEL DRIVE
Your 'Jeep' vehicle has sufficient
Dower and traction to take vou
safely throush conditions which
vould be hazardous or impossible
for cooventional vehicles 'JeeP'4'
wheel &ive is a Powerful, useful
tool that will perform many difi-
cult tasks, but-it must be used with FIO, s-ENGINE LUBRICAAION

22
ENGINE LUBRICATION
The en{ine is lubricated with a cositv for the "break-in" Period.
forcc-feed- continuous circutating If the vehicle is used on the high'
svstem. A rotor (ype Pump circu wav change the engine oil al 500
t;tes the oil. It islocated exlernallv miles (800 kln ) and 2000 miles
on the left side of the eogine, and (3200 km ), then everv 2000miles
is &iven by a spiral gear on the (3200 km ) thereafter. For heavv
camshaft. industrial or dusty field wo.k,
The oil is drawn into the circulat chanee the oil at the fr.st ten
ine system lhrough a floating o;l hours, andeach50hou
rsthereafter.
iniake. The floatine intake pre- The crankcase is drained bv re
vents wat€r and dirt, $hich may moving the drain plug in the lower
have accumulated in the bottom left side of the oil pan.
of the oil pan, from circulating be' Alwavs drain the oil when the
caus€the ;il is drawn from nearthe eneine is wsrm. If it is drained
roDsurfacr. when rhe ensine is cold. some of
the au€ntitv of oil in the crank- rhe foreisn maner will remain in
case is measu;ed by the bayonet lhe bo(tom of the oil pan. Iosins
ferentiats (exccpt Powr Lok dif-
ferentials),
and steering
sear.
The
proper SAE gradeof GL4 should
b€ selected to corespond with
climatic conditions.
Each 1000 miles [1.600 km.l
clean each lubricati@ fitting in-
dicated by No. 1 on the Lubrica,
tion Chart and use a pressure sun
All spring shackles and spring
pivot bolts are shown as No. 2 on
the Lubrication Chart, but some
of thes€points will rot have lubri-
cation fittings. Where there is no
lub.ication frtting at one of these
points, indicatins a silent block
SPRING SHACKLES AND PIVOT BOLTS
LUBRICATION FITTINGS
OIL FILTER
AIR CLEANER
GENERATOR
STARTING MOTOR
to lubdcate. Be sure that the
greasechannels are oDen to l)ro-
vid€ complete lubricatlon of bear-
bushins has been installed, that
point is Dot to b€ lubricated.
Where there are tub.ication fit,
tings at th€ spring shackles or
pivot bolte tub.icate at each fit-
ting with a pressure
guD every
1000
miles
[1.600
km.].
tlT€ oil level indicato. which is
combined with the oil filler caP on onebenefit of the oil change.
Afte. draining replace the plug
the oil fiIle. oiDe located or the and refill with fresh oil Add an
risht side
of rhi engine.
Mainrain addirional
quarl if theoil 6lter has
rhe eneine oil level betw(en lhe slso been drained
"Add Oil" and "Full" marks on At teast once a vear, prefetablv
rhe enq;nediD slick. in the spr;ne, remove the oil pan
The- crankiase is filled at the and fioaring oil intake and wash
factory with oil of the proper vis thorouehlv with cleaning solution
LUBRICATION CI{ARTS
The lubrication illustratioDs on composite and mav not n€ces-
the followins pages are prepared salily renect anv particular vehicle
as a euide to the location of some in all details. Text should be cate'
ol th; major lubr;cation points as fullv read for olh€r points not
indicated;n lhe chartsa.companv indicated on lhe charls
ing them. The chassisshown is a
ENGINE OIL CLASSIFICATIONS
The oil filter should be dis-
mantled, cleaned aDd the filter
element replaced at the end of the
firut 2000miles (3200 km.) ofhigh
vay travel, or 100 hours of indus-
trial or field u*. Replace the
elemcnt at each 6000 miles (9600
km.) of hishway t.avel or 150
The oil bath ai. cleaner
thoroughly removes all dust from
the air before it ente.s the carbure-
tor. For efficient ope.ation, the
clean€r must be selviced at reg
ular inteNals. SeNice the unit at
each engine oil charge. To service
the air clean€r, unscrew the eye
bolt on th€ oil cup clamp and re
WATER PUMP AND CLUTCH
move the oil cup. Scrape a dirt
from inside the oil cup and clea,
the iDside eurface with cleanine
solutior. Refill with new oit of th;
same vrscosity as is recommended
for the engine crankcase to the oi1
level bead and insta)t the cuD s€_
curely to the cleanerbodv witL the
attaching clamp.
cated at assembly and the lubdcant
lasts the life of the bearings.
The American Petroleum Insti These new desi$ations replace
tion to the above ctassification.
tute has adopted a new system of the older designationsof "resular"'
claslifyinse;sine oilsaccord;ng
to premium". and healv dutv .
twe ois&ici. rnesenewdesiena Depending
upon the condirions
of
tions are: operation,
€ithetMM or MS grade
rs
recommended
for 'JeePvehicles
ML - Iisht andfavorable
serv.
-ice. The API-SAE viscosity number-
:^^,
system
is not affected
bY lhis
MM -mod€mre
to severe
s€rv- irE";.. r. i" still necessatv
to
"p."& tt'" Sls number io addi-
The water pump bearing and
clutch .eleaseb€a.ine arepfelubri-
Two oilels are provided oD the
generator -- one at each €nd. Two
to four drops of engine oil in each
oiler is recommended every 1000
m']es(1600
km.).
MS most severeservrce.
MULTIPURPOSE GEAR LIJBRICANT GL4
A new multipurpose eear tub.i bevel, and worm sear applications.
cant desienared
as A.P.I. S€rvice GL4 isrecommended
in theLubri
GI-a' hasimprovedloadcaryins cation Specificalion
table for th€
capacity for;ost hypoid, spirat trans'nission, transfer case' dif- The starting motor is lubricated
at a$embly and requir$ nofurthcr lubrication be8reen stating motor

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DISTRIBUTOR
The distributor should be lubri made accessibleby removing the
cated
evely 1000miles
(1600
km.). rotor a!m. Sparingly apply soft
Place aeveraldrops of engineoil in srease on the breake. arm cam.
the oiler. Also place one drop of Apply a drop ofoil on the breaker
light ensineoil onthewick located aim pivot.
on thc top of the shaft, which is
SPEEDOMETER
Remove the speedomete. drive with a sood quality lisht e.aphite
shaft from the tub€ onceeach
year, grease.
cleanit thoroushly and lubricate
STEERINC GEAR
Checkthe tubricant lewelin the ins level. Shouldlubricant be .e-
steerins
gear
housingat each1000 quired, fill thehousinestowly
with
miles 11.600 km.l to be surethat a hand compressor.
Do not over
the lubdcant is at fi1le. plus open- look replacing the filler plug.
UNI\ERSAL JOINTS (PROPELLER SHAFT)
Lubdcate the univcrsal joints to lubricate tl|e tunnions to avoid
and slip joints for both f.ont and damaging tle trunDion bearing
rcar propeller shafts with a good seals which might occur through
quality lubricant every 1000Diles the use of a high pressureguD.
11.600
km.l.Use ahandcompressor
UNIVERSAL JOINTS (FRONT AXLE SHAFT)
Thc front axle universal joiDts axle shafts and unive.sal joint as-
arccnclosed
in the steering lnuckle semblies should be r€moved, thor-
housingswhichare
6lled
with lubri oushly cleanedand the housines
cant.Checkcach1000mil€s(1600 filled with fr€sh lubricant. Clea;
km.) to bc surc the housings are aDd.epack the housingstwice each
fillcd to plug l€vel. Onceeachyear year if the vehicle i5 usedfor dusty
(12,000 mile!) (19,200km.) the field wo.k.
UNIVERSAL JOINTS (POWER TAKE-OFF PROPELLER SHAFT)
Thc original factory lubrication otris usedfor continuous opcmtion,
will lsst thc lifc ofthe v€hicl€ under disass€Dbl€and repack onc€ cach
avcrsg. servic€. If tnc power take- year.
WHEEL BEARINGS
Front whe€l b€arings should equipped with tubrication frttings
be removed, tnoroughly cleaned, and should be lubdcated ev€rv
ch€cked,and repackede!€ry 6000 1000miles[1.600
km.].Fi'st cha;r
miles[9.600 km.l or twice yearb.. the lublicant relief hol€, Fis. 33,
The rcar whccl bearings are No. 1, et tlle top of the howing
and then lubricate sparingly to
gua.d asainst surplus oil saturating
the brake linings. Llbricant flow
ing out the relief hole indicat€s thc
bearing is properly filled.
Lubricate all bea ngs and clevis
pins of the haod brake control
each 1000miles [1.600
km.]. Lubri-
HAND ERAKE CONTROL
BRAKE MASTER CYLINDER
CHOKE CONTROL
cate the b.ake cables inside thc
ffin" *"n 1o'ooomiles
[16.000
Checkthe fluid level in the brake
mastercylinder every 1000miles
11.600
km.l. Wipe cteanthe top of
the filter cap and abo the housiDe
areaaroundit. Replenishthe
bmke
fluid to a leyel rZ" lr,3 cm.) be\ow
the top of the fiII hole. Use only
heaa'1,
duty b.ake fluid conforming
to specificationSAE-70,R1. Be
su.e to handle the brake fluid in
clean dispeft.rs and containe$
that will not introduce even the
slightest a.rnount of other liquids.
Replace and tighten thc fille. cap.
Lubricate the exterior su aces
of the flexible conduit with pene' lntinc oit
every1000
mircs
11.600
CLUTCH LINKAGE
Lubricate all friction points of
the clutch linkage every 1000miles
[1.600 km.]. Use the same grade
ofengire oil asusedfo. the engine.
Failu.e to lub.icate these points
will result in premature wear; thc
links will wear and the holes in
the mating parts will bccome
TRANSMISSION AND TRANSFER CASE
Drilled passases between the
standard three-speedtransmission
and the t.ansfe. case housiflgs
permit lubricatine oil to circulate
between the two units- Howewer,
each unit should be seNiced
Optional four-speed transmission
and transfer case housings have no
provbion for lub.icating oil to
cirolate between them and musl
be serviced separately.
Check the oil level every 1000
m es (1600 km.). Drain and rcfitl
each unit every 10,000 miles
(16,000 km.) or 300 hours of field
NOTE: The lubricant capacity
of the housings is small fo! €cono-
my, soit is vcry important that the
lubricant be changedevery 300
hours when the vehicle is used for
dusty field work.
Eard shifting of the transmis€ioD
geals in cold weather is a pGitivc
indication that the trarsmission
lub cant is eithcr too hcavy a
srade or the quality allo,i's it to
congealat the p.evailing tempera-
ture.This condition
will also
prob-
ably apply to the transfer caae
and
ditrerentials. If the oil is too heaw
to attow easeof shifting, it ir too
beavy to properly lubricate thc
close fitting parts. Change the
lubricant to a lighter gradewithout
delay.

Check thc level in the difreren-
tial housings every 1000 Dites
Ir.600
km.l to be surethat the
irbricant isat thelevelof thefiller
plugopenings.
Draib and
refilleach
housins
every10,000
mil€s116,000
km.l. Do not mix ditrercnt tYPeE
DIFFERENTIALS
POWR-LOK DIFFERENTIAL
SPRlNGS
of lubricants. Use light eneine oil
or light flushing oil to clcan out
the hoLrsins(except on Powr-Lok
ditr€rentials). Do not use water,
steam, kerGene, or easoline for
flushing.
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Some
vehicles
ateequippedwith
locking ditrerential (optional equip-
ment). Lockine ditrerential lEe a
brassplate stamPedwith the letter
? under one of the gear cover
screw
heads
(Fig.27, item 17)
to
distinsuish it from standard dif
Ordinary lubricants musf not
be used in the locking ditrerential.
Use only Willys Powr Lok Ditrer-
ential Oil, Part No. 94557,furnish-
Do not flush the Powr Lok dif'
ferential. The use of cl€aning sol
vents of any kind is not recom-
The vehicle sp ngs should not
be lubricated. At assembly the
leaves are coated with a long-
lasting special lubricant which is
designed to last the life of the
springs. Spraying with the usual
mixture of oil and ketosene has a
tendency to wash this lubricant
from between the spring leaves.
GOVERNOR
Check the oil level in the gove.- the ensine Drain and refill the
nor housing at each lubrication. housing at each ensine oil change'
Use oil of the same glade used in
POWER TAKE.OFF SHAFT AND PULLEY DRIVE HOUSINGS
Check the lubdcant level at each the power take-o$ be used fre-
lubrication job, maintaioine the quendv, changethe lubricant each
lubricant at filter plug level Should 300 hours. E
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3t30
MAINTAININGYOUR :FED VEHICLE
POWER
PIANT
PERIODIC INSPECTION
CHECKING VALVE TIMING
ProDer maintenance of You.
'Jeep'-vehicle demands that it be
qiven a thorough service inspec
tion and lubrication at €ach 1000
miles I1.600 km.l of operation
Such an inspection consists of a
careful road test and examiDation
by a competent se.vice technician
to locate and analyze any small
faults that may have developed
Prompt correction of minor faults
thus discovered will go far toward
holdins down maintenaoce expense
and costly delays in operation.
Your 'Jeep' vehicle dealer is
vitally interested in your 'Jeep'
vehicle and it will pay you to have
him regularly insp€ct it. Many
dealers' s€rvice technicians have
the advantage of complete factory
specifications cove.ins the v€hicle
as well as bulletins which are
regularly sent out by the factory.
The follo\rins paragraphs outline
methods of making minor adjust
ments and also suggestP.ev€ntive
maintenance ope.ations. Should
major rcpai. work be n€cessary,
consult you. 'Jeep' vehicle dealer.
The valve timins may be
checked in the following manner:
Adjust the inlet valve lash of No.
1 cylinde. to .026' (.6604 mm.).
Then rotate the craDkshaft clock-
wiseuntil the piston in No. 1 cylin-
der is ready for the intale stroke.
To dete.min€ this, estimate the
9o befo.e top center position on the
timing gear cover. figure 8, by
notins the distance between the
top center ma.k and th€ 5' mark,
and aligD the notch oD the fan
drive pulley with the 9o position.
With the crankshaft in this posi-
tioD, valve tiDidg is correct if No.
I rocker arm is just tight against
the end of the valve stem.
After checking, reset the valve
lash to the cor.ect clearance.
Should the timing be incor.ect,
it is advisable to consult you.
'Jeep' vehicle dealer.
FIG. 8 {IL PUMP
r? R.ri.f v,lvc Prunia!
PUMP
20 pounds(1.4 kg./sq. cn.) at 3s
mph. (56 km./h.) and 6 pounds
(.a3ke./sq.cm.) at the idtespeed
of 600 rpm.
The oil pump drive shaftdrives
ENGINE TUNE-UP
For best performance and de-
p€ndability, the engine should havc
a tune-up twice yearly, preferably
in the sp.ins and fall.
Proper tune-up proceduie should
include the following:
. Clean and tight€n the battery
cable terminals, the battery ground
connection and sround strap on the
right side of tlle engine at the
front eDgine support.
. Remove th€ spark plugs, clean
them thoroughly and sPace the
electrqles to .030/ 10,76
mm l gap.
. Check valwe clearance See
Remove t}te distdbutor caP
and inspcct the contact Points.
Adjust ihe points to.020" 10,51
mm.l sap.
. check tne isnition timing. See
ADJUSTING
The tash on €xhaust valves
should
beset at 016" (.406
mm),
intake valvesat .018' ( 46 rnm.).
Us€carein makins this adjustment
that the measu.enents a.eaccurate
by usinsfeele.
sauges
andmaking
sure that the taPPets are restng
against the lowest surface of the
"Electrical Section."
. Clean the fuel pump filt€.
screen and check the fuel line con
. Remove and clean the venti
. Sta.t tne engine and allow it
to run until thoroughly waim, tnen
s€t tlle throttle adjustins screw,
so the enginewill idle at 600 rpft.
. Adjust the carburetot low spced
idle screw so that the ensine will
idle smootlly.
Should the engine fail to perform
satisfactorily and the tlouble is
definitely t.aced to the carburetor,
consult your 'Jeep' vehicle dealer'
Carburetor service is specialized
and should not be undertaken un
less the unit is thoroughly under'
VALVE LASH
OIL
The oil pump is plovided with
a Pressure relief valve which con
trcls the oaximum oil plessu.e
at
The minimum safe pr€ssure is
FIG. ?_TIMING MARKS

33
FIG. 9 END SECAIONAL VIEW OF ENGINE
FIC IO SIDE SICTIONAL VIEW OF ENGINE
27-verve Tarp4 Adjulring s.r.s

both the pump and the distdbutor.
SeeFie. L Should it be necessary
to re;ve the oil PumP, first re'
move the distributor cap aod carc'
fully not€ the position of the rotot
to ellow reinstallatioo without dis-
turbing the ignition timing
w}len th€ pump is reinstaued,
use care that tlle drivins key on the
end of the distdbutor shaft is cor-
r€ctty meshed with the slot on the
end of the pump shaft. To make
thc installationwithout disturbing
the ignitiontiming, the PumP
ge€r
must becorrectlv
m$hed with the
camshaft gearto allow meshof the
distributor dlivirs key a'd slot
with the distributor rotor in th€
originalposition.
Should it b€ necessary to reset
th€igrition timing,ref€r
topage4l
The rubber engine moutltmgs,
which are attached to the frame
side rail brackets and to the sup"
Dort Dlate. Prev€nt fore-and_aft
inotioi of tne engine,vet allow free
sidcwisc and vertical oscillation
ENCINE MOUNTINGS
FLOATING OlL INTAKE
CRANKCASE IIENTILATION
which neut.alizes vibration at the
source. KeeP the mountings tight.
A loos€enginemay causc
vib.ation,
ctutch chatter or high fuel l€vel in
Th€ floating oil intake, figure 9'
No. 24,
isattached
to the crankcas€
with two 3cr€ws.
The constructron
of th€ float and screencausett to
remaino! topofthe oil, preventing
tnc circulationof water and dirt.
Once€ach
yearremove thefloat'
scre€nand tube and clean thor_
oughly with a suitable cleaning
fluid. when replacing, bc sure to
install a new gasket between t]te
noat support and tle eneine crank-
case.
A leak at this point will atlow
air to enter tne oil suction line,
seriously atrecting th€ oil prc$ure.
FIG. 1I CRANKCASE VENTILAfINO SYSTEM
The crankcase ventilation sys-
tem provides thorough. Positive
ventilation which reduces lorma-
tion of sludge in the crankcase
Anv vaDors in the crarkcase are
..'iiea - nt" the manifold and
bumed or exhausted This syst€m
is shown in Fig. 11. Note that the
valve is shol*n out of Position for
claritvi it is shown in a vertical
DosiEion whereas it is instelled
;ith its connectine tubing in a
horizontal position.
Maint€nance ofthe radiator con,
sists of keepins the exterior of the
radiator core clean, the interior
free from rust and scale, and the
radiator f.ee from leaks. The €x
terior of the radiator core should b€
cleanedand the radiator insDected
for leaks each 1000 miles 11.600
kn.l of normal service oi ttre
vehicle. If the r€hicle is subjected
to coDsiderable off-the-.oad opera
tion, this interval should be each
1000 miles or 30 days, whichev€r
inte.val occurs fir€t.
Cleaningshould bep€rformed by
blowine out with air €tream or
water stream di.ected from the
rear of the radiato.. A visual in-
spection is not sumcient as the
accumulatioD of small particles of
foreign natedal on the cor€ sur
fac€s can rest.ict cooling without
closingthe coreopenings.Examine
the radiator carefully for leaks b€-
fore and after cle€ning.
The cooling system should be
nushed twice a year and checked
for leaks, preferably in the spring
aDd fatl at the time of chaosins
the antifreeze. Always correct any
cooling system leaks before install
ing antifreeze. A corrosion inhibitor
should b€ used ir the cooling syg
coouNG
sYslEM
RADI ATOR
tem to prevent the formation of
.ust and scale. A quality-brand
antifreeze wilt contam a corosion
inhibitor. When the antifreeze is
draiDed iD the sp ng, a corrosion
inhibito. should be added with the
Be sure that the oil filter tube
cap sasket is in good condition.
Always keep the cap locked se_
When tuning the engin€o. srind-
inc valves, remove the control
valve and cleanit thoroughly. If
the valve is blocked with carbon'
the veDtilating system will not
oD€rat€
and shouldthe valve fail
6 s€at, it will be impo$iblc to
make the ensi& idle satisfactorilv

RADIATOR PRESSURE CAP FAN BELT
The pressure cap hetF to pre
vent loss of coolant by ewaporatlon.
It should never be rcplaced bY a
nonpressure tYPe. The Pressure
cap, which maintairc pressure in
the cooling system up to 7 Psi
[0,492 kg-cm?] makes the engine
more emcient bv permitting a
sliehtly higher opetating tempera-
ture. Vacuum in the radiator is
relieved bv a valve in the cap
which opds at % to Lpsi. [0,0ss a
u,u/u kg-cm!t vacuum,
To remove the radiator pressure
cap wheD the ensine coolant tem
peratuft is high or boiling, Place a
cloth over the pressure cap and
turn counterclockwise about Za
turn until the fi.st (pressure re-
lease) stop is reached. KeeP the
cap in this position until all Pres
sure is released. Then, Push cap
down and turn still further until
caP
canberemoved.
To instalt
thepressurccap,
Place
it in position
andtu.n it clockwise
asfar as
it will eo.
The fan aDd gencrator are driven
by aV-belt. The drive of the V-belt
is on the sides
of the V. A fan belt
that is
^too tight will cause rapid
wear or the generator and water
pump bearinss. If the belt is too
loose, it oay slip preventiDg th€
water puop from properly cooling
the engine or the geDerator from
prope.ly chargins the el€ctricat
circuit. The fan belt is properly
adjusted when it can be den€cted
%" Ir3 r.rr..lwith strons
thumb
pressure midway bet\'€en the fan
and senerato. pulleys. Check this
adjustment and inspect the con-
dition of the fan belt at each
engme lubrication p€riod. It is
good preventive maintenance to
replace a badly frayed, worn, or
cracked fan belt before it breaks
To .eplace the fan belt, Ioosen
the attaching bolts at each genei-
ator brace-to-enginemountirle and
pivot the eenerato. towa.d the
engine to gaiD slack neededto in,
stall the new belt. Remove the otd
belt. Position the new belt over
the fan pultey, over the crankshaft
pulley, then over the generator
pulley. Pull the generato. away
rrom the ensine untiL rhe belt
tension is fiim. Ther tighten the
gelerator mounting bolts and
check the tension as indicated
above. Reset the gene.ator as
necessary for coffect belt tension.
Finally, if a torque wrcnch is
available, toque the gererator
mounting bolts 25 to 35 lb-ft.
[3,4 a 4,8 ks-m.l.
FIG, 12 RADIATOR CAP
DRAINING THE COOLING SYSTEM
Two drain cock are provided
to completely drain the coolins
systeD. When &ainilg the system,
to guard asainst freezins damage.
use carc that both cocks are
opened. One drain is located at
the bottom of the radiator, the
other in the cylinder block under
the generator. Remove the radiator
cap to break any vacuum which
might prcvent tho.oueh dminioe.
COLD WEATI{ER PRECAUTIONS
A thermostat, figure10,No. 5,
i$ located in the water outlet in the
top of the cytinder headto Provide
quick wsrming and to Prevent
overcooling
durins normal vehicle
oDeration.
Thevalvcstartsto open
ai app.oxim'tely 163"F.
U3'C.l
and is fully ope'ed at 188"F.
[87'C.!. Th€ temperature at
which the unit operates is set bY
the manufacturer and cannot be
alt€.cd. Should sudden heating oc'
cu., the the.mostat should b€
checked first as failure of this unit
will n€arly block the water circula-
tion. As a check, reDove the ther'
mostat and if overheating is
climinated,install a n€w one.
In regions
wherewinter tempeia-
tures can be eyoected to droD be-
low 32"F. [0"C.iprecautions
musr
be taken to prevent freezing of the
water in the cooling system. With-
out the protection ofsumoent anti-
freeze
sotutioD
added to it, water in
the cooling system witl freezeand
expaDd,
possibly buftting the radi-
ator and the cylinder block.
It is important that the cooling
system be made leak-pioof before
installing any antifteeze solution.
Be sure that hose connections a.e
tight and that the hoses arc in
good coDdition. Should there be
doubt regarding the condition of
either radiator hoses or heater
hoses,
replacethem.
The base for the two most com
mon aDtifre€ze solutions is either
methyl alcohol or ethytene glycol.
Do nor mix these two tFes in rhe
cooiingsystem as
ahyd.ometer will
not grvean acclrrate reading of the
Methyt alcohol has a lower
evaporation point than ethytene
glycol. For this reason, when
alcohol base solution is used it
should b€ checked at least once a
week. Use of ethyleDe glycol (per-
manent) is mandatory when a
high-temperatu.e thermostat has
Immediately after adding anti-
freeze, run the ensine a few mo-
Dents to thoroughly mix the sotu,
The following tables show the
degree of protection obtained from
adding different amounts of anti-
THERMOSTAT
WATER PUMP
The water pump assembly is a
centrilugal imp€ller tl,?e of lerge
capacity to circlrlate the water in
theentirecooling
system.
The sealedt}?e double-row ball
bcari'g is intesral with thc ahaft
and b-pacl€d at th€ time of a.!€m-
bly with a special hieh meltine
point $ease,sorequires no lubri
The pump is designed
to give
maximuo service without adjust-
ments. Should trouble develoP,
consult your 'Jeep' vehicle dealer'

ANTIFREEZE CI{ART
38
LCNI !.^
l
u,s.ANTIFREEZE PROTECTION TO TEMPERATURE SHOWN
McthvLAlcohol Ethyld. GIYco)
Cent. Fahr' Cmt.
Your 'Jeep' vehicle has either a
6'volt or l2-volt electrical svstem.
As the electrical ci.cuits reoain
the same for both systems, the
wiring diaS,rsms represent both
6-volt and 12.volt wiring Howevet,
bulbs and etectncal components
a.e not always irterchangeable and
a reDlacement irem of the correct
volt;se ratinc must b€ Ycu'ed.
Use caution arouncl tIIe nlgner
ETECIRICAT
SYSTEM
BATTERY
l-oltage of the l2-volt system as
accidental short circuits a.e more
cspable of darnsging electrical
units.
Also,
arcsaround
the l2_!blt
battery are more apt to ignite any
gas that may be escapingfrom it
All elect cal c$ntact Points
should be checked regularly fot
secure
and corrosion-f.ee
connec_
tions.
The batt€ry is cithe. a l2-volt'
50 hour capacity or a 6 wolt, 105'
amperehour capacity. It is located
under the hood on a bracket at-
tached to the right hand side rail
of the frame and is held ffrmly in
the bracket with a hold-down
frame, and two studs and wing
Keep the two wing nuts on tbe
hold-d;wn f.ame snug but tighten
only with fing€r Pressure, never
with wrench or Pliers. This Pre
caution will avoid cr.cessive
pres"
sure on the battery case
Keep the battery terminals and
cablescleanand tieht- A light coat
of vaseline at thc appiied terminals
witl ftduce corrosion. Occasional
cleansing around the terminak with
sodasolution or ammonia witl Pre
went accumulation of corosive de-
posits. Do not allow either soda or
ammonia to get into the battery
cells. Keep the cell caps in Place
and sealed during the cleaniDe.
Chcck the batte.y oncc a we€k
with a hy&ometer aid at the ssme
time check the electrotyte level in
each celli add distilled wster to
maintain the solution level %'
tI cm.l above the Plates Avoid
over filline and do not fail to re
Dlace and tighten the ceil caPs
A hydrometer reading of r.260
indicates that the battery is fully
charg€d. Should the reading fall
below 1.225, it will be necessary
to recharg€ the battery or else
use the lights and battery spa.inglv
until the battery has had the oP-
portunity to build its€lf up agarn.
3 N5TR|]MIIIT!OLIIOTRTIULIIOR
BUNOi
LGI]I
I'IG. 13_WIRING DIAGRAM 3743
0