lights JEEP CJ 1953 Service Manual
[x] Cancel search | Manufacturer: JEEP, Model Year: 1953, Model line: CJ, Model: JEEP CJ 1953Pages: 376, PDF Size: 19.96 MB
Page 7 of 376
'Jeep*
UNIVERSAL SERIES
SERVICE
MANUAL
B
LUBRICATION
AND
PERIODIC SERVICES
Contents
PAR. SUBJECT
PAR.
SUBJECT
GENERAL
.B-l
Chassis
Lubrication
B-7
Engine
Lubrication System B-4, B-6
Special
Lubricants B-2
Fresh
Lubricant.
.B-3
LUBRICATION CHARTS
. Pages 8, 9
SERVICE
MAINTENANCE SCHEDULE.
.B-8
Air
Cleaner
B-2
5,
B-2
6
Air
Filter
—
F.E.E.C.
System Canister
B-2
4
Axle
U-Bolts B-49 Body
Lube
Points: B-65 Hood Hinge Pivot Points B-66
Glove
Compartment Door
Latch
B-6
7
Tailgate Hinges .B-68
Brakes,
Adjust .B-41
Brake
Linings .B-42
Brake
Master Cylinder B-40
Charging
Circuit
B-l9
Clutch
. B-43, B-44
Cooling System—Radiator. B-28, B-29 Differentials
........
.B-50, B-51, B-52, B-53
Distributor
B-14, B-l5
Engine
Oil B-9
Engine
Oil
Filter
B-10, B-ll
Engine
Tune-Up B-20
Exhaust
Emission Control System
B-2
2
Exhaust
Manifold Heat Control Valve. . . .B-l2
Exhaust
System
B-2 3
Fan
Belt . .B-21
Front
Axle U-Joint B-54, B-55
Generator
.B-16
Headlights B-61
Heater Controls B-62
Lights
and Controls B-59 Positive Crankcase Ventilation Valve. . . .B-l3
Shock Absorbers B-48
Spark
Plugs. B-17
Speedometer Cable. .B-60
Spring
Bushings.. . .B-46
Spring
Shackles .B-47
Steering
Gear
B-2 7
B-l. GENERAL
All
'Jeep' Universal vehicles require periodic
lubri
cation and other maintenance services for normal
vehicle
usage
and application to promote satis factory operation and prevent
excessive
wear. Un
der severe operating or atmospheric conditions
these
services should be performed more
often
than
under normal conditions. It should also be remem
bered that common short trips and
stop-and-go
driving
are more severe on lubrication
points
than
Starting
Circuit
B-l8
Tie
Rod and Drag
Link
Sockets
.
B-45
Tires
B-64
Transmission
and Transfer Case—
Lubricant
Level
Check B-30
General
B-31
Transfer
Case B-32
Transmission
.B-33
Transmission
and Transfer
Case
—
Lubricant
Change .B-34
General
.B-35
Transfer
Case B-36
Transmission
B-3
7, B-38
Transfer
Case Linkage B-39
Universal
Joints and Slip Joints.
.......
.B-58
Wheel
Bearings..
.........
. . .B-56, B-57
Windshield
Wiper and Washer B-63
LUBRICATION
OF
OPTIONAL EQUIPMENT
B-69
Centrifugal
Governor. .B-71
Pintle Hook .B-70
Powr-Lok
or
Trac-Lok
Differential B-72
PARTS REQUIRING
NO LUBRICATION.
. . .B-73
Alternator
Bearings. B-76
Clutch
Release Bearings.
.............
.B-74
Shock Absorbers B-78
Springs
B-7
7
Starter
Motor Bearings B-75
Water
Pump Bearings B-74
LUBRICATION REQUIREMENTS FOR OFF-HIGHWAY OPERATIONS
B-79
Air
Cleaner B-82
Chassis
Lubrication
B-83
Engine
Oil B-80
Engine
Oil
Filter
B-81
Differentials .B-86
Front
Axle U-Joints. B-84
Transfer
Case and Transmission .B-85
constant
speed
driving on highways, and even more
intensified in extreme cold or hot weather; there fore, vehicles driven under
these
conditions must
be lubricated and serviced more
often
than nor mally operated vehicles. The specifications of
types
and
amounts of lubricant given in the Lubrication
Chart
and
text
of this section should be closely
followed. The off-highway operation lubrication
notes,
given in the last part of the section, should
be followed when applicable. 7
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 17 of 376
'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL
B
Reinstall
the axle shafts, and
refill
the housings to
plug level using the universal joint lubricant
specified in
Lubrication
Specifications.
B-56.
Front
Axle Wheel Bearings
To
lubricate the wheel bearings, it is necessary
to remove, clean, repack, and adjust them. When
front wheel hubs and bearings are removed for
lubrication,
they should be thoroughly washed in a
suitable cleaning solvent. The bearings should be
carefully
dried and then given a thorough cleaning
and
inspection. Use a clean brush to remove all
particles
of old lubricant from bearings and hubs.
After
the bearings are cleaned, inspect them for
pitted races and rollers. Also, check the hub oil
seals.
Note:
Wheel bearing lithium base lubricants are
used at the factory for
initial
fill
of
these
bearings.
When
lithium base and sodium base lubricants are
mixed,
the result is a thinned-out mixture that
can
bleed through seals. It is therefore important
that lubricants with the correct base be used when
lubricating
the wheel bearings.
Should
leaks occur at wheel bearing seals, the leaks
may
be caused by a mixture of two
types
of
lubri
cants.
In such cases, the old lubricant should be
completely removed before new lubricant is added.
Wheel
bearings should be thoroughly cleaned,
lubricated
with lithium base and reinstalled.
Repack
the bearing
cones
and rollers with grease
and
reassemble hub in the reverse order of the
disassembly. Test the bearing adjustment as out
lined
in Section Q.
B-57.
Rear
Axle Wheel Bearings
The
Rear
wheel bearings an early models equipped
with
lubrication fittings with a vent opening
through the housings above each fitting should be
lubricated
sparingly, each
2,000
miles
[3.200
km.].
Use
a hand compressor and wheel bearing grease,
forcing
the grease through each lubrication fitting
until
it flows from the vent. Vent should be kept
clear
of obstruction or grease
will
back up into the
brakes.
Do not add grease after it flows from the
vent for it may be forced through the wheel key-
way
onto
the outside of the wheel and possibly
onto
the brake linings.
Rear
wheel bearings that do
not have lubrication fittings should be removed
each
12,000
miles
[19.200
km.] and the bearing
cleaned, inspected and repacked. Refer to proce
dure
in Par. B-56.
Note:
When servicing the Flanged Axle Unit
Bear
ing Assembly, refer to Section N, Par. N-5 for
proper
lubrication procedures.
B-58.
Propeller Shafts
and
Universal Joints
The
propeller shaft slip joints and universals should
be lubricated with a hand compressor grease gun so as to not damage the bearing seals. The units
should be lubricated with a
good
quality grease.
Refer
to the
Lubrication
Chart
for lubrication fre
quency and lubricant type and grade. B-59.
Lights
and
Controls
a.
Check
all interior and exterior lights and light
switches for proper operation, including: parking
lights, headlamps (high beam and low beam),
tail
lights, brake lights, directional lights, and in strument panel lights.
b.
Check
all instrument panel controls and
instru
ments for proper operation.
B-60.
Speedometer Cable
Remove the
speedometer
cable from its housing every
12,000
miles
[19.300
km.].
Clean
it thor
oughly and coat it with a
good
quality light graphite grease.
B-61.
Headlights
Refer
to Section H.
B-62.
Heater Controls
Apply
Lubriplate
130-A to all friction points and
pivot points on the heater controls panel unit as well as the pivot points at the dashpot. Apply
a
few drops of penetrating oil all along the Bowden
cable.
This
oil
will
penetrate into the center wire.
B-63.
Windshield Wiper and
Washer Controls
Lubricate
the friction points and the pivot points
on the windshield wiper transmission and linkage
arms
with a slight amount of
Lubriplate
130-A.
B-64.
Rotate Tires
Refer
to Section Q for the correct method of rotat ing the tires.
B-65.
Body Lube Points
•
Refer to Par. B-66 through B-68.
B-66.
Hood Hinge Pivot Points
Lubricate
the frictional points of the hood hinge
pivot points with a few drops of light-weight
engine
oil.
B-67.
Glove Compartment Door Latch
Sparingly
wipe
Lubriplate
130-A on the
glove
com
partment door latch.
B-68.
Tailgate Hinges
Lubricate
the friction points of the tailgate hinges
with
a few drops of light-weight
engine
oil.
B-69.
LUBRICATION
OF
OPTIONAL EQUIPMENT
B-70.
Pintle Hook
When
lubricating the vehicle, place a few drops of oil on the pintle hook and safety latch pivot pins.
B-7!.
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. 17
Page 29 of 376
'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL
C
FIG.
C-18—DAUNTLESS
V-6
ENGINE
TIMING
MARKS
C-15.
Primary
Circuit
Tests
Excessive
voltage
drop in the primary circuit
will
reduce the secondary output of the ignition coil,
resulting in hard starting and poor performance. Inspect all primary wiring for
loose
or corroded
terminals, worn insulation, and broken strands,
a.
Connect voltmeter positive (-J-) lead to the
positive battery terminal, as shown in Fig. C-20.
The
negative
lead (—) is connected to the ignition
side of the resistor on Dauntless V-6
engine.
The
negative
lead (—) is connected to the ignition
pri
mary
of the coil on Hurricane F4
engine.
Con
nect a jumper wire from the distributor primary
terminal
of the coil to the ground. Be sure all lights and accessories are off. b. With the ignition switch on, the
voltage
should
not
exceed
.4 volts. More than .4
volts
indicates
excessive
resistance
exists
in the battery cable, ignition switch wiring, or the ignition switch. The
excessive
resistance may be located with voltmeter checks across each section of the circuit.
c. Remove the jumper wire from the coil. Connect
the voltmeter positive (-f) lead to the distributor
terminal
of the ignition coil. Ground the
negative
(—) lead of the voltmeter.
12156
FIG.
C-20—IGNITION
PRIMARY
CIRCUIT
RESISTANCE
CHECK
1—
Distributor
2—
Distributor
Primary
Terminal
3—
Coil
4— Ignition Resistor 5— Ignition Switch 6— Ignition Switch Side of Resistor 7— Positive Battery
Terminal
8—
Battery
9—
Jumper
Wire
d.
Note
the
voltage
with the ignition switch on.
If
battery
voltage
is indicated, the distributor
breaker
points
are open. Rock the
engine
to
close
the points. Voltage
less
than .2 volt indicates the
points
are satisfactory. Voltage more than .2 volt indicates burned or high resistance in the ignition
points
or a poor distributor ground.
C-l
6. Distributor
Resistance
Test
A
dwell tester is used for the following
tests.
Ex
cessive resistance in the ignition primary circuit,
from the distributor side of the coil through the
points
and to the distributor ground,
will
prevent
the coil from producing sufficient output for
good
overall
ignition. Any resistance in this portion of
the ignition system
will
be indicated on the dwell
FIG.
C-21—DISTRIBUTOR
RESISTANCE
CHECK
14242
FIG.
C-19—DISTRIBUTOR
ROTATION
AND
FIRING
ORDER,
V-6
ENGINE
29
Page 31 of 376
'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL
C
FIG.
C-22—-CHECKING
FUEL
PUMP
PRESSURE
—
DAUNTLESS
V-6
ENGINE a
couple of strokes to be sure the pump is primed.
Using
a half-pint
bottle
or similar measure, pump
Vi
pint [0,24 It] of fuel by cranking the
engine
with
the starter motor. Count the strokes neces
sary
to
fill
the measure. If more than 20 strokes
are
required, the fuel pump is inefficient, the tank
line is leaking air, or the fuel supply is restricted.
Check
fuel filter in the fuel tank if line is restricted.
C-24.
Check Manifold Vacuum
To
check the intake manifold vacuum on the
Hurri
cane F4 engine, remove the ventilation valve and
L
fitting from the manifold and install special adapter. On the Dauntless V-6
engine
remove the
pipe plug located in the right
rear
of the intake
FIG.
C-23—CHECKING MANIFOLD VACUUM
—
HURRICANE
F4
ENGINE
manifold and install special adapter. Connect the
vacuum
gauge
tube to the special adapter as shown
in
Fig. C-23 for the
Hurricane
F4 engine.
Start
the engine. Connect a Tachometer
Tool,
C-3896,
from the distributor
primary
terminal to ground and set the
engine
speed at the specified
rpm.
given in Par. C-30. Observe the vacuum
read
ing and interpret as follows:
a.
A steady reading from 18" to 20" [457 a 508
mm.] of mercury is a normal reading, indicating
that valve and
spark
timing, valve seating, and
piston ring sealing are all satisfactory.
b. A steady but below normal reading indicates
a
condition common to all cylinders such as a
leak
at the carburetor gasket, late ignition or valve
timing, or uniform piston ring and bore wear.
c.
A slowly fluctuating or drifting reading in dicates that the carburetor idle mixture is incorrect
Look
for the cause in the fuel system.
d.
A rhythmic pulsating reading is caused by a
condition affecting one or more cylinders, but not
all,
and indicates leaky valve, gasket blowby, re
stricted intake port, or an electrical miss.
e. An intermittent pulsating reading is caused by
an
occasional malfunction, such as a sticking valve
(all
valves may be
erratic
in operation if the valve
springs are weak), electrical miss caused by insuffi
cient distributor point tension or low coil
voltage
coupled with inconsistent
spark
plug
gaps
or fouled
plugs, or
dirt
in the fuel system finding its way into
passages of
critical
size or valve
seats
in the
car
buretor.
f.
A normal reading that quickly falls off (with
engine
running at
2000
rpm.) indicates exhaust
back
pressure caused by a restriction in the exhaust
system.
g.
Make indicated corrections to bring vacuum to 18" to 20" [457 a 508 mm.] of mercury normal
reading.
C-25.
Carburetor Adjustments
•
Refer to Fig. C-24, C-25 and C-26.
Carburetor
adjustments should not be attempted
until
it is known that
engine
ignition and com
pression are in
good
order. Any attempt to adjust
or
alter the carburetor to compensate for faulty conditions elsewhere
will
result in reduced econ
omy and overall performance.
Caution:
If an
engine
is idling too slow or rough,
this may be caused by a
clogged
ventilator valve
or
hose;
therefore, never adjust the carburetor idle
without first checking the crankcase ventilator
check valve and
hose.
The
air cleaner must be left in place while making
idle speed and mixture adjustments. All lights and accessories, must be turned off. The positive
crank
case ventilator system should also be in
good
oper
ating condition when making carburetor adjust ments.
Either
of
these
items noticeably affects the
air
fuel ratio at idle.
•
Hurricane
F4 Engine.
Note:
The idle mixture adjustment procedure for
the late model
YF-4941S
and
YF-6115S
Carter
31
Page 144 of 376
Fl
EXHAUST EMISSION CONTROL SYSTEMS
12793
FIG.
Fl-1—HURRICANE
F4-134
ENGINE EXHAUST EMISSION CONTROL SYSTEM
1—
Anti-Backfire
Diverter
Valve
2— Air
Pump
3—
Pump
Air
Filter
Injection
Tube(s)
(Inside
Manifold)
5—Air
Delivery
Manifold
6—
Check
Valve
Ignition
timing must be set at 0 or at top dead
center.
Fl-10.
Exhaust Manifold
The
exhaust manifold is provided with a
boss
that is drilled and tapped at each cylinder to accept the
air
delivery manifold and injection tubes.
Fl-11.
MAINTENANCE
Efficient
performance of the exhaust emission con
trol
system is dependent upon precise maintenance.
In
addition to the air pump and connecting
hoses
and
tubes, this system's efficiency is dependent
upon special carburetor calibration, distributor cen
trifugal
advance curve and ignition timing setting
which
must be adjusted at 0 or top dead center.
Road
test
is a factory recommended optional serv ice every
6,000
miles
[9,600
km.] to evaluate over
all
performance.
The
following procedure is recommended to assist
in
diagnosing performance and/or emission level
problems that are peculiar to
Exhaust
Emission
Control
System equipped vehicles.
Fl-12.
Carburetor
Check
carburetor number for proper application. (Specifications are listed at the end of this section)
Check
the dash pot and adjust as required.
Proper
carburetor idle mixture adjustment is im
perative for
best
exhaust emission control.
The
idle adjustment should be made with the en
gine
at normal operating temperature and air
cleaner
in place. Adjust the throttle
stop
screw to
idle the
engine
at specified RPM. All lights and accessories must be turned off.
Fl-13.
Carburetor
Idle
Setting
NOTE:
The idle mixture adjustment procedure for
the late model
YF-4941S
and
YF-6115S
Carter
Carburetor
equipped with the
External
Idle
Mix
ture
Limiter
Cap is the same as outlined below
in
Pars.
"A"
through
"D";
however, because of the
Idle
Limiter
Cap,
the idle mixture screw
CANNOT
be adjusted in the counter-clockwise
(rich)
direc
tion. The adjustment is made from the
rich
stop
position and the mixture screw is turned in (clock
wise) approximately %
turn
to "Lean Best
Idle."
Refer
to Section E, Fig. E-6.
The
"Lean
Best
Idle"
method of idle setting is as follows:
a.
Any scheduled service of ignition system should
precede this adjustment. 144
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 155 of 376
'Jeep'
UNIVERSAL
SERIES
SERVICE
MANUAL
F2
14043
FIG.
F2-6—REPLACING VACUUM MOTOR ASSEMBLY
A—Drill
VW
Hole
B—Sensor
Unit
Replacement Position
1—
Motor
3—Sensor
Unit
2—
Spot
Welds
4—Retaining
Strap
•e.
Drill
a
%j
inch [2,78 mm.] hole in snorkel tube
at
point
"A"
as shown in Fig.
F2-6.
f.
Use the motor strap retainer and the
sheet
metal
screw
provided in the motor replacement kit to secure the retainer and motor to the snorkel tube.
g. Make sure the screw
does
not interfere with the
operation of the damper assembly. Shorten screw
if
required.
F2-9.
Replacement
of Air
Cleaner Sensor
a.
Remove two sensor retaining clips by
prying.
See
Fig.
F2-7.
b.
Pull
vacuum
hoses
from sensor.
c.
Note
carefully the installed position of the sensor so that you can install new sensor in same position.
Then
remove sensor.
d.
Install
sensor and gasket assembly in air cleaner
m
same position as noted in
step
c.
This
is to eliminate the possibility of interference with the air
filter
element.
e.
Install
sensor retaining
clip,
meanwhile support
ing
sensor at B around the outside rim to prevent 14042
FIG.
F2-7—REPLACING SENSOR ASSEMBLY
1—Sensor
Retaining
Clip
damage to the temperature sensing spring. See
Fig.
F2-7.
f.
Reinstall
vacuum hoses.
F2-10.
AIR
PUMP
The
air injection pump is a positive displacement
vane type which is permanently lubricated and
requires
no periodic maintenance.
The
pump contains an integral relief valve which
controls the
air
supplied to the
engine
exhaust ports
during
high speed operation to limit maximum exhaust system temperatures.
F2-11.
AIR
FILTER
The
air injection system draws clean air from the
carburetor
air filter through an inlet hose, into the
air
pump and from the pump through two
outlets
(one for each cylinder head).
F2-12.
AIR
DELIVERY MANIFOLD
The
air delivery manifolds constructed of cold
rolled
steel with a zinc plating, distribute the air
from
the pump to each of the air delivery tubes in
a
uniform manner.
Two
check valves are included to prevent the
reverse
flow of exhaust
gases
to the pump should
the pump drive
fail.
This
reverse flow would dam
age the air pump and connecting hose.
F2-13.
AIR
INJECTION TUBES
The
air injection tubes of stainless steel are in serted into machined
bosses
of the cylinder head.
The
tubes project into the exhaust ports directing
air
into the vicinity of the exhaust valve stem.
F2-14.
ANTI-BACKFIRE VALVE
The
anti-backfire valve is used to provide a "gulp" of air into the
engine
induction system during
rapid
throttle opening and subsequent closure.
During
rapid
throttle closure, the valve
opens
for approxi
mately one (1) second and bleeds air into the
intake
manifold through a fitting in the carburetor.
Its
function is to bleed an adequate amount of
air
below the carburetor throttle plate to compen sate for the
overrich
fuel mixture normally inducted
into the combustion chamber during
rapid
throttle
closure.
Filtered
air from the pump is provided to the
anti-backfire
valve by means of a connecting hose.
An
exhaust system backfire
will
result if the valve
fails
to function properly.
F2-15.
ENGINE COMPONENTS
The
following item varies in design or specifications
from
those
on vehicles not equipped with the Ex
haust
Emission
Control
System.
F2-16.
Carburetor
Check
carburetor number for proper application. Specifications are listed in this section.
Proper
carburetor idle mixture adjustment is im perative for
best
exhaust emission control.
The
idle adjustment should be made with the en
gine
at normal operating temperature, lights and accessories off and the air cleaner in place.
Adjust
155
Page 159 of 376
'Jeep'
UNIVERSAL SERIES SERVICE
MANUAL
F2
F2-35.
EXHAUST EMISSION CONTOL SYSTEM
DISTRIBUTOR SPECIFICATIONS
Distributor:
Make
Delco-Remy Prestolite Prestolite
Model...
1110376
IAT-4501 or IAT-4502 IAT-4502A
Breaker
Point Gap .016"
[0,406
mm.] .016"
[0,406
mm.] .016"
[0,406
mm.]
Breaker
Arm Tension 19 to 23 oz. [538 a 652 gr.] 17 to 22 oz. [482 a 623 gr.] 17 to 22 oz. [482 a 623 gr.]
Cam
Angle. 29° to 31° 29° + 3° 29° ± 3°
Max.
Auto Advance
(Crankshaft
Degrees). 13° to 15° at 1,950 rpm. 16° (& 1800 rpm. 21° @ 1800 rpm.
26°
@
4200
rpm. (Max.) 32° @
4200
rpm. (Max.)
Max.
Vac. Advance
(Distributor
Degrees) 8° 8° 8°
Condenser Capacity. .18 to .23 mfd. .25 to .28 mfd. .25 to .28 mfd.
Timing:
Crankshaft
5°
(BTC)
@ Idle 5°
(BTC)
© Idle 0°
(TDC)
© Idle
Mark
Location Crankshaft Pulley Crankshaft Pulley Crankshaft Pulley
Firing
Order
1-6-5-4-3-2 1-6-5-4-3-2 1-6-5-4-3-2
F2-36.
SPARK PLUG
GAP
Spark
Plug Gap. .035"
[0,889
mm.]
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 Control 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 physi
cally
altered or modified in any respect.
DATA
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 V6-225 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 035
•
DWELL
. . . 30* (.016
POINT
GAP) •
IDLE SPEED
. . .
650- 700
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
14400
NOTE:
The
above
tag applies to vehicles equipped with Distributor Model
IAT-4502A.
On
vehicles equipped with Distributor Models
1110376,
IAT-4501 and IAT-4502 the tag is the same
except
that Ignition Timing is 5°
T.D.C.
Always
refer to the data tag when checking or re-adjusting ignition timing, idle speed, and idle mixture.
159
Page 172 of 376
H
ELECTRICAL
SYSTEM SUBJECT
PAR.
Directional
Signal
Lamps
H-138
Hazard
Warning
Lamps
H-139
Head
Lamp
Replacement H-130
Head
Lamp
Aiming Procedure H-131 Headlight Dimmer Switch H-127
License
Plate
Lamp
H-136
Main
Light
Switch. H-126
Marker
Lights .H-l40
Parking
and
Turn
Signal
Light
H-133
Stop
Light
Switch. H-l28
Tail,
Stop and
Turn
Signal
Lamp
.H-134
H-1. GENERAL
All
'Jeep' Universal vehicles are equipped with 12- volt electrical systems. Use caution around the higher
voltage
of the 12-volt system as accidental
short
circuits are more capable of damaging electri
cal
units. Also, arcs around the 12-volt battery are
more apt to ignite any gas that may be escaping
from
it. In the following paragraphs
will
be found
information about the battery, distributor, coil,
generator, alternator,
voltage
regulator and start ing motor. These units with the connecting wires,
make
up the
engine
electrical system. The wiring
diagram
will
show the different circuits of the en
gine
electrical system and the various units which
make
up
those
circuits.
With
plastic-covered wiring harnesses use only
rubber-insulated
wiring clips.
Caution:
All current production vehicles are 12- volt, negative ground. Whenever servicing a 12-
volt electrical system, use caution, as an accidental
short
circuit is capable of damaging electrical units. Disconnect battery ground cable before changing
electrical
components.
H-2.
Battery
The
battery is a storage reservoir for electrical
energy produced by the alternator or generator.
The
battery should store sufficient energy for
operation of the entire electrical system when the
alternator
or generator is not pr 1,scing output,
such
as when the ignition is first turned on. Of
particular
importance is maintaining the electrolyte
at the correct level, regularly checking with a
hydrometer, and maintaining clean, tight cable connections.
Battery
service information is given in this section.
Caution:
Do not allow flames or sparks to be
brought near the vent
openings
of the battery since
hydrogen gas may be present in the battery and might explode.
Note:
The liquid in the battery (electrolyte) is a
solution of sulphuric acid which, on contact, can
injure
skin or
eyes,
or damage clothes. If it is spilled
on the skin or spattered in the
eyes,
promptly flush
it
away with quantities of clear water only. If the
acid
is spilled on clothes, wet it thoroughly with a
weak
solution of ammonia, or with a solution of sodium bicarbonate or baking soda.
SUBJECT
PAR.
HORN
H-137
ELECTRICAL
COMPONENT
REPLACEMENT
H-150
WINDSHIPLD
WIPER SYSTEM
H-141
thru
149
SERVICE
DIAGNOSIS.
. .H-151
ELECTRICAL
SPECIFICATIONS
H-152
Caution:
When installing the battery, the nega
tive terminal must be grounded. Reverse polarity of the battery can cause severe damage to the charging system.
Battery
Inspection
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. Prepare a strong solution of baking soda
and
water and 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,
connect cables to battery and coat the terminals
with
heavy grease.
e.
Inspect the battery cables and replace if badly
corroded
or frayed.
Check
tightness
of terminal
screws to ensure
good
electrical connections.
Check
the
tightness
of the negative ground cable connection 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 10
volts the battery is satisfactory. If the
voltage
falls
below the figure given, yet the specific gravity is
above
1.225,
the condition of the battery is questionable.
g. Be sure the
engine
ground strap connection, 172