service interval JEEP CJ 1953 Service Manual
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Page 11 of 376
'Jeep*
UNIVERSAL
SERIES
SERVICE
MANUAL
13330
FIG.
B-4—ENGINE
LUBRICATION
SYSTEM
—
DAUNTLESS
V-6
ENGINE
1—
Rocker
Arm Shaft
2—
Main
Oil
Line
3—
Oil
Inlet where it is connected by a drilled passage in the
cylinder
crankcase to an oil screen housing and
pipe assembly. The screen is submerged in the oil supply and has ample area for all operating condi
tions. If the screen should
become
clogged
for any reason, oil may be drawn into the system over the
top
edge
of the screen, which is held clear of the
sheet
metal screen housing.
Oil
is drawn into the pump through the screen and
pipe assembly and a drilled passage in the
crank
case, which connects to drilled passages in the
timing chain cover. All oil is discharged from the
pump to the oil pump cover assembly. The cover
assembly consists of an oil pressure relief valve,
an
oil filter bypass valve and a nipple for installa
tion of an oil filter. The spring loaded oil pressure
relief
valve limits the oil pressure to a maximum
of 30 pounds [13.607 kg.] per square inch. The
oil
filter bypass valve
opens
when the filter has
become
clogged
to the
extent
that
4V2
to 5 pounds [2.04 a 2.27 kg.] pressure difference exists
between
the filter inlet and exhaust to bypass the oil filter
and
channel unfiltered oil directly to the main oil galleries of the engine.
A
full flow oil filter is externally mounted to the
oil
filter cover nipple on the right side of the en gine, just below the alternator. Normally, all
engine
oil
passes through the filter element; however, if
the element
becomes
restricted, a spring loaded bypass valve
opens
as mentioned above. The main
oil
galleries run the full length of the crankcase
and
cut into the valve lifter guide
holes
to supply
oil
at full pressure to the lifters. Connecting pas
sages
drilled in the crankcase permit delivery of
oil
at full pressure to all crankshaft and camshaft
bearings.
Holes drilled in the crankshaft
carry
oil from the
crankshaft
bearings to the connecting rod bearings.
Pistons and cylinder walls are lubricated by oil
forced through a small notch in the bearing parting
surface on the connecting rod, which registers with
the
hole
in the crankpin
once
in every revolution. Piston pins are lubricated by splash.
Drilled
holes
in the camshaft connect the front camshaft bearing
journal
to the key slot in the front
of the camshaft. Oil flows from the
journal
into
the keyslot over the woodruff key in the space
between
the key and the camshaft sprocket and fuel pump eccentric.
The
forward end of the fuel pump eccentric in corporates a relief which allows the oil to escape
between
the fuel pump eccentric and the camshaft
distributor
gear. The oil stream strikes the distri
butor shaft gear
once
each camshaft revolution, and provides ample lubrication of the timing chain and
sprockets by splash.
The
rocker arms and valves on each cylinder head
are
supplied with oil from the oil galleries through
holes
drilled in the front of the cylinder block and
cylinder
head. The
hole
drilled in the cylinder
head ends beneath the front rocker
arm
shaft brack et. A notch cast in the base of the rocker arm shaft
bracket
allows the oil to flow up inside the bracket
in
the space
between
the bracket and bolt, to the
hollow rocker arm shaft which is plugged at both
ends.
Each
rocker arm receives oil through a
hole
in
the underside of the shaft. Grooves in the rocker
arm
provide lubrication of the bearing surface. Oil
is metered to the push rod seat and valve stem
through
holes
drilled in the rocker arm. Excess
oil
drains off and returns to the oil pan through
passages in the cylinder head and block. Refer to
the
Lubrication
Chart
for lubrication frequency and
lubrication
type and grade.
B-7.
Chassis
Lubrication
Chassis
and
engine
should be serviced at periodic
intervals.
Most chassis lubricating points, whether
long-life or conventional, have standard lubrication
fittings. Refer to the
Lubrication
Specifications and
Service
Maintenance Schedule for specific points
and
lubricating time intervals. It is not necessary
to disassemble prepacked joints to lubricate them.
Merely
add new lubricant, as described in Par.
B-3,
to remove all old lubricant.
At
the appropriate interval, clean each lubrication
fitting indicated on the Lubrication
Chart
and
Service
Maintenance Schedule. Use a pressure gun
to lubricate. Be sure the grease channels are open
to provide complete lubrication of bearing surfaces.
In
some
cases it may be necessary to disassemble
to clear plugged channels.
When
vehicles are driven primarily in abnormally dusty or wet areas or when a vehicle is subject to
severe operating conditions, perform
these
services
more frequently. Under
these
conditions, no definite interval can be recommended because of the great variety of
uses
and conditions of use. 11
Page 12 of 376
B
LUBRICATION B-3.
SERVICE
MAINTENANCE
SCHEDULE
Perform
the following operations at the mileage shown. Two thousand miles equals
3,200
km.
SERVICE
MAINTENANCE
SCHEDULE
OPERATION
VEHICLE
^ n>
MILEAGE
IN
THOUSANDS
6 8 10 12 24 30
Check Wheel Nut Torque*
Check
Fluid
Level
in Battery X Check
Fluid
Level
in Brake Master Cylinder0. X
Service
Cooling
System X Service Tires X
Lubricate
Distributor
Cam Lubricator (F4-134) X
Lubricate
Steering Linkage X
Lubricate
Propeller Shaft Universal Joints X
Lubricate
Propeller Shaft
Slip
Joints ; X
Lubricate
Tie Rod and Drag
Link
Sockets................................... X Change Engine
Oil
and
Filter,
and Service Air Cleaner (F4 134 Engine)** X
Change Engine Oil and
Filter,
and Service Air Cleaner (V6-225 Engine)**....
Check Brake Operation and Pedal
Free
Play X Check
Clutch
Pedal
Free
Play. .... X
Check all
V-Belt
Tensions X
Check Exhaust Emission System
(If
so equipped)*** \ X
Service Positive
Crankcase
Vent
Valve
and Breather . .' X
Road Test
Including
a Check of all Instrument
Lights
and Controls X Tune-up Engine
Check Operation of
Manifold
Heat
Control
Valve
Clean
Exterior of Radiator
Align
Headlights • Check Brake
Linings
,
Check Exhaust System for Leaks Replace Canister Air
Filter
(F. E. E. C. System)
Check
Axle
U-Bolt
Torque. Check Lubricaunt
Level
of Front
Axle
Universal Joints
Check Shock Absorber Mountings and Bushings Check Front and
Rear
Spring Bushings
Lubricate
Distributor
(V6-225).
Replace Spark, Plugs
Check Charging and Starting Circuits
Lubricate
Tailgate Latch, Supports and Hinges.
Lubricate
Door and
Hood
Hinge Pivots ;
Lubricate
Glove Compartment Door Latch
Lubricate
Heater Controls •
Lubricate
Windshield
Wiper and Washer Controls
Clean,
Repack and
Adjust
Wheel Bearings
Change Transmission and Transfer Lubricant. .
Replace
Dry-Type
Air Cleaner • Check Lubricant
Level
of
Differential
Lubricate
Transfer
Case
Shift
LeArer
Control
C«se.
. , . . . . . . . .
Continuing
each
2,000 miles
Continuing
each
6,000 miles
Continuing
each
24,000 miles
X
Continuing
each
30,000 miles
•Check after the
first
200 miles [320
km.
J
of operation.
If
wheel or wheels are changed for any
reason,
have
wheel nut torque rechecked after an additional two hundred miles of operation
••Service mileage shown or every 60 days, whichever occurs
first.
•••Maintenance check on emission system must be performed per
information
in this manual. "See text for brakes.
"Nj
^Miles
2,000
6,000
12,000
18,000
24,000
30,000
Kilometers
3,200
9,600
19,200
28,800
38,400 48,000
B-9.
Engine Oil
For
maximum
engine
protection under all driving conditions encountered during the recommended
oil
change intervals, it is necessary to use only
"MS"
certified
sequence-tested
oils. The term
"MS"
must appear on the oil container singly or
in
conjunction with other designations. "MS" des
ignated oils are heavy-duty detergent oils that are
formulated to withstand all service conditions in
modern powerplants. Engine oils designated only
as
"ML"
and/or
"MM"
are not recommended and should not be used except in an emergency when
"MS"
oil is not available. Certified
sequence-tested
engine
oils are described on their containers by
such
phrases as:
meets,
exceeds,
excels, or has
proven superior in the
test
requirements,
test
sequences, MS Service
tests,
standards, and service
requirements,
of automotive manufacturers, auto
makers,
or car manufacturers for MS service or
Service
MS.
It
may be necessary to change
engine
oil more
frequently than normally recommended, depending upon the type and quality of oil used, the severity
of operation conditions, if the
engine
is used for
short
periods in cold weather, or if the
engine
is allowed to idle for excessive periods.
Always
drain
the crankcase while the
engine
is hot since
dirt
and contaminants are then more
likely
to be held in suspension and therefore
will
drain
out more completely.
Drain
the crankcase as follows:
a.
Position the
drain
receptacle under the
drain
plug.
b.
Remove the
drain
plug using the correct size
wrench.
Be careful of hot oil.
c.
Carefully
clean the
drain
plug. Inspect and
replace
the gasket, if deteriorated.
d.
When the oil has drained, replace and tighten
the crankcase
drain
plug. 12
Page 13 of 376
'Jeep'
UNIVERSAL
SERIES SERVICE
MANUAL
B
e.
Check
for the presence of
excess
water in the
oil
that might indicate an internal leak from the
cooling system.
f.
Pour oil into the oil filler tube. Replace the oil
filler
cap.
B-10.
Engine Oil
Filter
Service —
Hurricane
F4 Engine
The
engine
oil filter assembly should be replaced at each
2000
miles
[3.200
km.] of normal
engine
use. To remove the filter, use oil filter wrench
C-4065.
To install a new filter, wipe the gasket —
contact surface with
engine
oil, screw on the unit
until
gasket contacts the sealing surface, and then tighten at least one
half
turn
more. DO NOT USE
TOOLS.
Turn
by hand only. When refilling the
engine
crankcase after filter has been changed be
sure
to add one extra quart [1 ltr.] of oil to
fill
filter
and oil passages. Run
engine
to make sure there is no leak at oil filter.
B-l 1.
Engine Oil
Filter
Service — Dauntless V-6 Engine
To
replace the oil filter, use oil filter wrench, Tool
C-4065,
to remove the filter. After the filter has
been removed from the oil pump housing located
on the right front side of the engine, wipe the
housing surface clean and oil the gasket on the base of the new filter to make a
good
seal. Screw
the new filter in position until its gasket contacts
the pump housing surface, then tighten at least
one-half
turn
until filter fits snug.
Note:
Tighten by hand only, do not use a tool to
tighten.
Replace
oil filter each
6000
miles
[9.600
km.] at
engine
oil change.
B-12.
Exhaust
Manifold
Heat
Control
Valve
— Dauntless V-6 Engine
A
thermally-actuated heat control valve is located at
rear
of the right exhaust manifold of the Daunt
less
V-6 engine.
This
valve has a bimetal thermo
static spring which holds the valve closed when
the
engine
is cold.
Each
time the vehicle is lubricated place a few drops of penetrating oil on the valve shaft bushings
and
then work the valve by hand making sure that
the lubricant is worked into the bushings.
Note:
If the valve shaft
does
not operate freely
penetrating oil should be used to free the shaft.
B-l 3.
Positive
Crankcase
Ventilation
System
Service
the ventilation system of the
engine
each
multiple of
6000
miles
[9.600
km.] on the odometer
after
initial
2000
miles
[3.200
km.] service. Re
place the ventilation valve each
12,000
miles
[19.200
km.].
For
information on servicing the positive crankcase
ventilation system on the
Hurricane
F4
engine
and
the Dauntless V-6 engine, refer to the Tune-up Section.
B-l4.
Distributor
— Hurricane F4 Engine
The
distributor shaft is lubricated through an oiler mounted on the side of the housing. Place three or four drops of light
engine
oil in the oiler each
2,000
miles
[3.200
km.]. Also place one drop of light
engine
oil on the wick located on the top of the
shaft, which is made accessible by removing the
rotor
arm. Sparingly apply cam lubricant to the
breaker
arm cam and place a drop of oil on the
breaker
arm pivot.
B-l
5.
Distributor
— Dauntless V-6 Engine
The
distributor has a lubricant reservoir that
car
ries
sufficient
lubricant
for the life of the distributor.
When
servicing breaker points, place one drop of
light
engine
oil on the wick located on the top of the shaft Also, apply cam lubricant sparingly to
the breaker arm cam, and place a drop of oil on the
breaker
arm pivot.
B-l6.
Generator
On
early production vehicles oilers are provided
at each end of the generator, for lubrication
pur
pose.
On late production vehicles one oiler is pro
vided at the
rear
(bushing end) of the generator for lubrication purpose. Place two to four drops of
light
engine
oil in each oiler every
2,000
miles
[3.200
km.].
B-l
7. Spark Plugs
Replace
spark
plugs. Refer to Section C.
B-18.
Starting
Circuit
Check
the starting
circuit.
Refer to Section H.
B-l
9. Charging
Circuit
Check
the charging
circuit.
Refer to Section H.
B-20.
Engine Tune-Up
Refer
to Section C of this manual.
B-21.
Adjust
Fan
Belt
Refer
to Section C.
B-22.
Exhaust Emission
Control
System or
Controlled
Combustion System
•
Refer to the appropriate section in this manual.
B-23.
Exhaust System
Check
the exhaust system for leaks. Refer to Section F.
B-24.
Fuel Evaporative Emission
Control
Canister Air
Filter
The
only service required for the
F.E.E.C.
system
is cleaning the air cleaner filter mounted at the
bottom
of the canister. The filter requires replace
ment at
12,000
mile intervals. Refer to Section
E,
Par. E-9 for service procedure.
B-25.
Oil Bath Air Cleaner
Some 'Jeep' Universal vehicles are equipped with
an
oil bath type air cleaner.
This
type air cleaner
thoroughly removes all dust from the air before it enters the carburetor, if it is properly serviced.
When
the vehicle is operated under normal condi
tions the air cleaner must be serviced at regular
intervals
as care of the air cleaner is extremely 13
Page 14 of 376
LUBRICATION
vital
to the life of the
engine.
When the vehicle
is operated under abnormal conditions, (for ex
ample when driven on secondary roads or through
fields) then service of the air cleaner must be more frequent
Note:
Under extreme continually dusty and dirty
conditions where the vehicle operates in clouds of dust and
dirt,
service the air cleaner daily.
a.
To service the air cleaner on vehicles equipped
with the
Hurricane
F4
engine
(Fig. B-5) unscrew
the eye
bolt
on the oil cup clamp and remove the
oil
cup from the cleaner body. Remove the oil from the cup and scrape all
dirt
from the inside, wash cup clean using a cleaning solution if neces
sary.
In summer
refill
the oil cup with IV2 pints [0,6 ltrs.] of
SAE-40
or 50 grade
engine
oil. In
winter
refill
using grade
SAE-20
engine
oil. For
servicing the air cleaner
body
(less
oil cup),
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 the
cleaner from the vehicle. Agitate the cleaner
body
thoroughly in cleaning solution to clean the filtering
element.
Dry
element
with low pressure com pressed air. Reinstall the cleaner
body
and replace
the oil cup. Service the air cleaner every
2000
miles
[3.200
km.].
b. To service the oil bath air cleaner on vehicle
equipped with the Dauntless V-6
engine
(Fig. B-6),
first
remove the air cleaner from the carburetor
by unscrewing the wing nut. Remove the oil cup
FIG.
B-5—OIL
BATH AIR
CLEANER
-
HURRICANE F4 ENGINE 1—
Horn
7—Clamp
2—
Flexible
Connector
8—Oil
Cup
3—
Hon
Clamp
9—Clamp
A—Carburetor
Vent Tube 10—Hose 5— Body 11—Clamp
6—
Screw
and
Lock
Washer 13—Gasket
FIG.
B-6—OIL BATH AIR
CLEANER
-
DAUNTLESS V-6 ENGINE
1—WinB
Nut
2—
Cover
3—
Rubber
Gasket
4—
Cork
Gasket
5—
Oil
Cup 6—
Breather
7—
Clamp
8—
Vent
Tube 9—
Air
Pump Hose from cleaner
body
and remove the oil from the cup,
scrape all
dirt
from the inside.
Clean
oil cup thor
oughly, wash filter
element
in a solvent that
will
leave it clean and dry.
Fill
oil cup to indicated
level with clean
S.A.E.
40 or 50 grade
engine
oil
(S.A.E.
20 grade in winter.) Assemble cleaner filter
element
to oil cup making sure that gasket is in
place
between
the two pieces. Assemble air cleaner assembly to carburetor making sure the gasket
be
tween
air cleaner and carburetor is in place. Secure
air
cleaner to carburetor with wing nut. Service the
air
cleaner every
6000
miles
[9.600
km.],
c.
Carefully
check the
hose
clamps and
fittings
on
the breather
hoses
at frequent intervals. Loose connections
will
affect proper operation of the
crank
case ventilating system.
B-26. Dry-Type
Air Cleaner Service the air cleaner on Dauntless V-6
engines
at each oil change under normal driving conditions.
If
the vehicle is operated under dusty conditions,
check the condition of the air cleaner
element
more
frequently and service if dirty.
Servicing
the air cleaner consists of cleaning or replacing the air cleaner
element
and replacing the
crankcase
ventilation filter (breather assembly). See Fig. B-7.
The
air cleaner
element
assembly consists of a
paper
element
and a polyurethane
element
The
paper
element
cannot be cleaned.
To
clean the polyurethane
element,
first carefullly remove it from the paper
element
Then
wash it in 14
Page 15 of 376
'Jeep*
UNIVERSAL SERIES SERVICE
MANUAL
B
solvent.
Wrap
the polyurethane element in a clean
dry
cloth and
squeeze
to remove all possible sol
vent. Do not wring the element or it may
become
torn.
After cleaning, oil the polyurethane element
liberally
with
engine
oil
(SAE
10W30) and
squeeze
to evenly distribute the oil through the element and to remove
excess
oil. The element should be damp
with
oil, not dripping.
Install
the polyurethane element on the paper element, taking care to have
edges
of the polyurethane element over the plastic end plates of the paper element.
Replace
the complete air cleaner element assembly every
24,000
miles
[38.400
km.]. Replace more
frequently if there is any apparent damage or evidence of plugging.
The
crankcase ventilation filter should be replaced, not cleaned, every
6,000
miles
[9.600
km.]. The
filter
is located inside the air cleaner housing.
12992
FIG.
B-7—DRY-TYPE
AIR
CLEANER DAUNTLESS
V-6
ENGINE
1—
Crankcase
Ventilation
Filter
2—
Polyurethane
Element
3—
Paper
Element
B-27.
Steering
Gear
Check
that the steering gear lubricant is at the
level of the fill-hole. If not, add lubricant to the
level of the fill-hole with the lubricant recom mended in the
Lubrication
Specifications. If abnor
mally
low, check the steering gear for possibility
of leaks.
B-28.
Cooling System
Check
the coolant level in the
radiator.
It should be
half
an inch below the neck. If not,
fill
the radiator
to
half
inch below the neck with the proper coolant.
Refer
to Section G.
If
the level of the coolant is abnormally low, check
the radiator,
hoses
and water pump for possible
leaks.
If a leak is suspected, refer to Section G.
B-29.
Clean
Exterior
of Radiator
For
proper cooling efficiency the radiator should be cleaned of foreign objects. Refer to Section G.
B-30.
Transmission
and
Transfer Case
Lubricant
Level
Cheek
•
Refer to Par. B-31 through B-33 as applicable.
B-31.
General
All
transfer cases and transmissions should be
serviced
separately even though drilled passages
are
provided for oil circulation
between
some
trans
mission and the transfer case housings. Procedure
from
the appropriate Par. below should be fol lowed to check the lubricant level of the various
types
of transfer cases and transmissions.
If
the transfer case or transmission fluid levels
are
found to be abnormally low, check both units
for any possible leaks.
B-32.
Transfer
Case
:
The
transfer case fill-hole is located on the right side of the transfer case housing. To check the
lubricant
level, remove the
fill
plug.
Lubricant
should be level with this fill-hole. If not, bring up to level by adding make-up lubricant as specified
in
the
Lubrication
Specifications.
B-33.
Transmission
The
transmission fill-hole is located on the right side of the transmission housing. To check the
lubricant
level, remove the
fill
plug.
Lubricant
should be level with this fill-hole. If not, bring
up to level by adding make-up
lubricant
as specified
in
the
Lubrication
Specifications.
B-34.
Transmission and Transfer
Case
Lubricant
Change
•
Refer to Par. B-35 through B-37 as applicable.
B-35.
General
Transfer
case and transmission lubricants should
be changed at the same time.
B-36.
Transfer
Case
To
drain
the transfer case, first remove the transfer
case fill-hole plug and then the transfer case
drain-
hole
plug. Let all fluid
drain
from case.
Then
install
the transfer case drainhole plug, and
refill
the
transfer
case through the fill-hole using the correct
lubricant
as specified in the
Lubrication
Specifica
tions.
At
30,000
mile
[48,000
km.] intervals lube the
transfer
case shift levers with
Lubriplate
No.
130AA.
Late
models have a lube fitting. To lube
older models, (without lube fitting) remove the
bottom
cover of the case, clean thoroughly and
pack
case
full
of lubricant.
B-37.
Transmission (3-Speed)
To
change the lubricant on all vehicles equipped
with
a three speed synchromesh transmission,
drain
the old fluid by first removing the fill-hole plug
and
then removing the drainhole plug. Since on
some
transmissions there are drilled passages be tween the transmission and transfer case that allow
oil
to circulate
between
the two units, the transfer
case should be drained before refilling the trans
mission.
When
all the fluid is completely drained, replace
the drainhole plugs only. For the correct specifi
cations and quantity, refer to the
Lubrication
Specifications. 15
Page 18 of 376
B
LUBRICATION
B-72.
Powr-Lok
or Trac-Lok
Differential
Refer
to Par. B-53.
B-73.
PARTS
REQUIRING
NO
LUBRICATION
B-74.
Water Pump Bearing,
Clutch
Release
Bearing
The
water pump and clutch release bearings are
prelubricated
for life when manufactured and cannot be relubricated.
B-7S.
Starter
Motor
Bearings
The
starting motor bearings are lubricated at assembly to last
between
normal rebuild periods.
B-76.
Alternator Bearings
The
alternator bearings are lubricated at assembly
and
require no further lubrication.
B-77.
Springs
The
vehicle springs 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 kerosene has a tendency to wash this
lubri
cant
from
between
the leaves, making it necessary
to relubricate
often
to eliminate squeaking.
B-78.
Shock Absorbers
Hydraulic
direct-action shock absorbers are per manently sealed and require no periodic
lubrica
tion service. Shock absorber mounting bushings
are
not to be lubricated.
B-79.
LUBRICATION
REQUIREMENTS
FOR
OFF-HIGHWAY
OPERATION
Adequate lubrication
becomes
increasingly im portant when vehicles are used in off-highway
operation. Under
these
conditions all operating
parts
of both the
engine
and chassis are subjected
to unusual pressures. At the same time such operation is usually under abnormal dust and
dirt
conditions making additional precautions neces
sary.
The importance of correct lubrication for
the conditions of operation cannot be overestimated.
B-80.
Engine
Oil
It
is important, that the oil in a new or rebuilt
engine
be changed after the first
eight
or ten hours
of operation, and for heavy, dusty work, every 50
hours
thereafter. Watch the condition of the oil closely and change it immediately if it appears to
be contaminated.
i-Il.
Engine
Oil
Filter
Replace
the oil filter at the end of the first 100
hours
of service. Under extreme operating con ditions, more frequent replacement may be re
quired.
The condition of the oil is a reliable
indicator
of the condition of the filter element.
If
the oil
becomes
discolored and shows evidence
of contamination, change the filter without delay.
(Refer
to
Par.
B-10, B-ll for the correct procedure
for replacing the oil filter.)
B-82.
Air Cleaner
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 dust is not
noticeable in the air, service the air cleaner each scheduled maintenance period. Whenever the air is
noticeably 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. (Refer to Par.
B-24
thru
B-26 for service procedures.)
B-83.
Chassis
Lubrication
The
period of lubrication depends entirely upon the type of work being done. Using the specified
interval
given in the Service Maintenance Schedule as a guide, lubricate at safe intervals required for
the particular type of operation. Under extremely
dusty conditions lubricate
these
points daily. Be
sure
to force enough lubricant into each fitting to force out the old lubricant which might be con
taminated 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 mix
ture.
It is
best
to simply wipe
these
parts clean
with
a cloth.
B-84.
Front
Axle
Shaft Universal Joints
For
off-highway use remove the universal joints twice yearly, thoroughly clean both the housings
and
joints with a suitable solvent, and
refill
the
housings to the
fill
plug opening levels with the
correct
lubricant as given in the
Lubrication
Specifications.
B-85.
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 off-highway use
drain
both housings every 300
hours
of operation and
refill
to the
fill
plug opening
levels. Refer to B-35 through B-37 when changing
lubricant.
B-86.
Front and
Rear
Axle
Differentials
Because of the higher pressure 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
and
Trac-Lok
differentials). Refer to
Par.
B-52 and B-53 for draining and flushing
differential.
18
Page 23 of 376
'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL
C The
valve, connecting pipes, and
hoses
must be
inspected and serviced at intervals of
2,000
[3.200
km.],
6,000
[9.600 km.] and 12,000 [19.300 km.]
miles, continuing each
6,000
miles [9.600 km.] of
vehicle operation thereafter. It may be necessary to inspect and clean the system more frequently
under
adverse driving or weather conditions.
Replace
the valve each 12,000 miles [19.300 km.],
a.
Dauntless V-6 Engine.
Filtered
air from the carburetor air cleaner enters the engine crankcase through a hose. The ventilation valve is mounted on the right cylinder bank
rocker
arm cover (Fig. C-7) and is connected by a
hose
to a fitting at the base of the carburetor at the
intake
manifold opening. The valve varies the air
flow through the crankcase to
meet
changing condi
tions at all engine
speeds
and loads. To check the operation of the system, remove the valve with the
hose
attached from the rocker arm cover.
With
the engine running at fast idle, a vacuum must be felt
at the open end of the ventilation valve. If no
vacuum
is present, the valve and
hose
should be
inspected and cause of the restriction determined.
To
check the valve disconnect it from the air
13334
FIG.
C-9—POSITIVE CRANKCASE VENTILATION SYSTEM
— F4
ENGINE (TYPICAL)
1—Valve
Open 2—Valve Closed
23
Page 147 of 376
'Jeep'
UNIVERSAL SERIES
SERVICE
MANUAL
Fl
Fl-27.
EXHAUST EMISSION CONTROL SYSTEM MAINTENANCE CHART
Efficient
performance of the Exhaust Emission
Control
System is
dependent
upon precise maintenance. As indicated in the following chart, it is very important that all of the maintenance require
ments
listed are performed with extreme care at
the specific intervals indicated.
OPERATION
Thousands of miles* or
number of months whichever
occurs first 2
6
12 18
24 30
R R
R R
R R
O O o O
O
o O
R
O
o
o
R
o
o o
o
o
o
O
o
Inspect engine-driven
belts
for condition and tension...
Replace positive crankcase ventilation valve (PCV) Replace filter on exhaust emission control system
Clean
carburetor air cleaner
Engine
tune-up
Check
engine
timing
Adjust
carburetor idle
speed
and mixture
Perform
factory-recommended road
test
for evaluation of overall performance and handling
R
— Required Services
O
— Optional Services
Miles
2,000
6,000
12,000
18,000
24,000
30,000
Kilometers
3,200
9,600
19,200
28,800
38,400 48,000
Fl-28.
EXHAUST EMISSION CONTROL SYSTEM CARBURETOR SPECIFICATIONS
Make
Models
Part
Number
Throttle
Bore
Main
Venturi
Low
Speed Jet
Main
Metering Jet
Idle
Port
Nozzle Bleed in Body
Pump Jet
Float
Level
Dash
Pot Setting
Engine
Idle
RPM:
with Distributor Model
IAY-4401A.
with Distributor Model
IAY-4401B.
Carter
— Single Bore
^ an H
YF
4366S ana 4941S, 6115S
1M"
[3,81 cm.]
IX"
[3,18 cm.]
.035"
[0,889
mm.] .089" [2,26 mm.]
.184" x .030" [4,70 a
0,765]
.028"
[0,713
mm.]
.024"
[0,610
mm.] lW [6,74 mm.]
%"
[3,75 mm.] 650 — 700 700 — 750
Fl-29.
EXHAUST EMISSION CONTROL SYSTEM DISTRIBUTOR SPECIFICATIONS
Engine
Make
Models
Rotation
Point Opening
Breaker
Lever
Tension..
Cam
Angle (Dwell)
Condenser Capacity
Dist.
Degrees and RPM:
Start..
Intermediate
Maximum
TIMING:
Crankshaft
Mark
Location
Firing
Order
F4-134
Prestolite
IAY-4401A
CCW
Rotor End
.020"
[0,508
mm.|
17 — 20 ozs. [482 a 567 gr.l
42°
.25 — .28 mfd.
0°
— 300
3°
— 375
13.5°
— 1700
0°
TDC @ Idle
Crankshaft
Pulley
1-3-4-2
Prestolite
IAY-4401B
CCW
Rotor End
.020"
[0,508
mm.]
17 — 20 ozs. [482 a 567 gr.
42°
.25 — .28 mfd.
0°
— 450
4.5°
— 550
13.5°
— 1700
0°
TDC @ Idle
Crankshaft
Pulley
1-3-4-2
Fl-30.
SPARK PLUG
GAP
Spark
Plug Gap. .030"
[0,765
mm.] 147
Page 148 of 376
Fl
EXHAUST
EMISSION
CONTROL
SYSTEMS
IMPORTANT
NOTICE
The
Exhaust
Emission Systems covered
in
this publication
meet
State and
Federal
requirements for hydrocarbon and carbon
monoxide
emissions.
To
assure continued proper operation,
these
systems
must
be
inspected
regularly,
parts must be replaced
at
factory-recommended intervals and
engine
tune-up services performed at intervals specified in the
Exhaust
Emission
Con
trol
System Maintenance charts.
For
the
above
reasons,
these
systems
must not, under any circumstances,
be
altered
to anything other than
required
specifications provided in this publication.
Further,
the
Exhaust
Emission
Control
System, or any
of
its components, must
not be physically altered or modified in any respect.
DHTfl
TAG
For
the serviceman's guidance, each vehicle equipped with exhaust emission
control
will
have data
tag
permanently affixed
to the
radiator shroud—-in
example:
VEHICLE
EMISSION
CONTROL
INFORMATION
MODEL
F4-134
C.I.D.
•
ENGINE
AT
NORMAL
OPERATING
TEMPERATURE
•
LIGHTS
AND
ALL
ACCESSORIES OFF
•
IDLE
MIXTURE
. . .
LEAN
BEST
IDLE
•
IGNITION
TIMING
0*
(TDC)
•
SPARK
PLUG
GAP
. . . .030
•
DWELL
...
42* (.020
POINT
GAP)
•
IDLE
SPEED
. . .
700-750 RPM
TRANSMISSION
IN
NEUTRAL
DURING
TUNE
UP
SEE SERVICE MANUAL
FOR
ADDITIONAL INFORMATION
THIS VEHICLE CONFORMS
TO U.S.
DEPT.
OF
H.E.W.
REGULATIONS APPLICABLE
TO
1971 MODEL YEAR NEW MOTOR VEHICLES
Jeep
CORPORATION
14401
Important:
Always refer
to
the data tag when checking or re-adjusting ignition
timing,
idle speed, and idle mixture. 148
Page 158 of 376
F2
EXHAUST EMISSION CONTROL SYSTEMS
F2-3L
EXHAUST EMISSION CONTROL SYSTEM
DIAGNOSIS
GUIDE
Pump Noisy
Hoses Touching Other Parts of Engine or Body (Hood).
Note:
The Air Pump is not completely noiseless.
Under
normal conditions, pump
noise
rises in pitch as
engine
speed
increases. It is desirable to allow
for normal break-in wear of the pump prior to re
placement for
excessive
noise.
Pump Seized
Replace pump.
-
do not pry on housing.
Leak
In Hose
Check
for leaks; using
soap
and water, tighten clamps or replace
hoses.
Pump Inoperative
Loose Belt — tighten belt
-
Filter
Plugged — replace.
Exhaust
Backfire
Check
for vacuum leaks — correct as necessary.
Check
anti-backfire valve — replace as necessary
Induction System Backfire
Verify
engine
timing and distributor dwell.
Verify
accelerator pump charge.
F2-32.
EXHAUST EMISSION CONTROL SYSTEM MAINTENANCE CHART
Efficient
performance of the Exhaust Emission very important that all of the maintenance require-
Control
System is
dependent
upon precise main-
ments
are performed with extreme care at the
tenance. As indicated in the following chart, it is specific interval indicated.
Thousands of miles* or
OPERATION
number of months whichever occurs first 2 6 12 18 24 30
Inspect engine-driven
belts
for condition and tension R R
Replace positive crankcase ventilation valve
(PCV)
R R
Check
for free operation of exhaust manifold heat control valve O O O O O
Clean
carburetor air cleaner — Oil Bath O O O O O
Replace carburetor air cleaner
element
— Dry Type O
Check
heated air system O O
Engine
tune-up O O
Check
engine
timing R O O O
Adjust
carburetor idle
speed
and mixture R O O O
Perform
factory-recommended road
test
for evaluation of overall performance and handling O O O O O
R
— Required Services O — Recommended Services
*
Miles Kilometers
2,000
—
3,200
6,000
—
9,600
12,000
—
19,200 18,000
—
28,800
24,000
—
38,400
30,000
—
48,000
F2-33.
GENERAL SPECIFICATIONS
Air
Pump Belt Tension 60 lb.
Rotor
Ring Screw Torque . 37 lb-in.
Housing Cover Bolt Torque 10 lb-ft. Speed Ratio, Air Pump to Engine
1
\i to 1
F2-34.
EXHAUST EMISSION CONTROL SYSTEM CARBURETOR SPECIFICATIONS
Make
Rochester Model Designation 2G Code Number
7027082
—
7041185
Choke
Manual
Number of Barrels 2
Throttle
Bore... \W [3,65 cm.]
Main
Metering Jet Production .051" - 60° [1,29 mm.]
High
Altitude — over
5000
ft .049" - 60° [1,24 mm.]
—
over
10,000
ft .047" - 60° [1,19 mm.]
Float
Level
Adjustment* 1%," [2,94 cm.]
Float
Drop Adjustment l%" [4,76 cm.]
Pump Rod Adjustment** 1%" [2,94 cm.]
Engine
Idle
R.P.M.
(In Neutral) 650 to 700
Initial
Idle Speed-screw
setting
3 turns in
Initial
Idle Mixture-screw
setting
2 turns out
Dash
Pot Setting. Y%w [3,75 mm.]
*From
air horn gasket to top of float at toe.
**From
air cleaner ring to top of pump rod.
158