1953 JEEP DJ fuel pressure

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Page 179 of 376

JEEP DJ 1953 Service Manual
Jeep
UNIVERSAL
SERIES
SERVICE
MANUAL

H

12967
FIG.
H-6—WIRING
DIAGRAM—LATE
V6
ENGINE

1—Left Headlamp

2—
Left
Parking and Signal Lamp
3—
Right
Parking and Signal Lamp

Page 180 of 376

JEEP DJ 1953 Service Manual
H

ELECTRICAL
SYSTEM

ffKHs)

3—<§)

FIG.
H-7—WIRING
DIAGRAM—V6
ENGINE
CURRENT
MODEL
1—
Left
Headlamp
2—Left Parking and Signal Lamp
3— Right Parking and Signal Lamp
4�

H

ELECTRICAL
SYSTEM

ffKHs)

3—<§)

FIG.
H-7—WIRING
DIAGRAM—V6
ENGINE
CURRENT
MODEL
1—
Left
Headlamp
2—Left Parking and Signal Lamp
3— Right Parking and Signal Lamp
4—Right Headlamp 5—
Marker
Lamp — Amber
6— Alternator 7— Voltage Regulator
8— Starting Motor
9— Battery Ground Cable
10— 12 Volt Battery
11—
Flasher
(Directional Signal)
12— Instrument Cluster
A—Hi-Beam
Indicator
B—Auxiliary

C—Instrument
Lights

D—Oil
Pressure Indicator
E—Charging
Indicator

F—Temperature
Indicator

G—Fuel
Gauge Indicator
H—Instrument Voltage Regulator
13— Ignition and Starter Switch
14—
Horn
Button
15— Directional Signal Switch
16— 4-Way Flasher Switch 17—
Flasher
(4-Way)
18— Windshield Wiper Motor Switch
19—
Main
Light Switch
20—
Fuel
Gauge
Tank
Unit
21—
Back-Up
Light Switch
22—
Marker
Lamp — Red
23— Right
Tail
and
Stop
Light 24— Right Back-Up Lamp
25—
Left
Back-Up Lamp 26—
Left
Tail
and
Stop
Light
27—
Marker
Lamp — Red
28—
Stop
Light Switch
29— Foot Dimmer Switch
30— Windshield Wiper Motor Assembly
31—
Ballast
Resistor 32— Ignition
Coil

33—
Spark
Plugs and Cables 34— Temperature Sending Unit
35—
Oil
Pressure Sending Unit 36—
Horn
37— Junction Block
38—
Marker
Lamp — Amber

lions
on the terminal
posts.
Be sure
condenser
is
mounted
firmly on the distributor for a
good
ground
connection.

Should a
condenser
tester
be available the capacity for
both
F4 and Prestolite V6
condenser
should
check from .25 to .28 microfarads. In the
absence

of
tester,
check by substituting a new
condenser.

H-13. Distributor Points
a. Examine the distributor
points.
If
they
show

wear,
poor
mating, transferred metal, or pitting,

then
new
ones
should be installed. Clean the
points

with a suitable
solvent
and a stiff bristled brush.
b. Check the
alignment
of the
point
for a full,
square
contact.
If not correctly aligned, bend the
stationary
contact
bracket slightly to provide align
ment.

c. The
contact
gap should be set at .020"
[0,508
mm.],
on the F4 and .016"
[0,406
mm.] on the
Prestolite V6. Adjustment of the gap is accom plished by
loosening
the lock screw and turning adjusting eccentric screw until correct gap is
secured. Be sure that the fiber block on the breaker

arm
is resting on the
highest
point
on the cam while the adjustment is
being
made. Recheck the gap
after locking the adjustment.
d. Apply a thin film of cam lubricant to the cam to
lessen
fiber block wear.
e. Using Tool C-4094, check
point
contact
spring
pressure, which should be
between
17 and 20

ounces
[0,487
a
0,567
kg.] on the F4 and 17 to 22 oz.
[0,487
a
0,624
kg.] on the Prestolite V6.

Check
with a spring scale
hooked
on the breaker

arm
at the
contact
and pull at right
angle
to the
breaker arm. Make the reading just as the
points

separate. Adjust the
point
pressure by
loosening
the stud holding the end of the
contact
arm spring
and slide the end of the spring in or out as
neces

sary.
Retighten the stud and recheck the pressure. Too low a- pressure will
cause
engine
missing at
high
speeds.
Too high a pressure will
cause
rapid
wear of the cam, block, and
points.
180

Page 212 of 376

JEEP DJ 1953 Service Manual
H

ELECTRICAL
SYSTEM
H-124. Testing Indicators and Gauges

Two
gauges
(fuel and temperature) and two in dicators (oil pressure and battery charge) that are
located in the instrument cluster

H

ELECTRICAL
SYSTEM
H-124. Testing Indicators and Gauges

Two
gauges
(fuel and temperature) and two in dicators (oil pressure and battery charge) that are
located in the instrument cluster are electrically operated.

The
fuel
gauge
is connected by a single wire to a
float-and-slide-rheostat sending unit in the fuel
tank.

The
temperature
gauge
is connected by a single

wire
to a resistance-type sending unit mounted on the engine.

The
battery charge indicator operates when there
is a difference in potential
between
the generator
and
the battery
.The
battery charge indicator lights
when the generator is not charging the battery. The
indicator
light
goes
out when the generator
begins

to charge the battery.

The
oil pressure indicator is connected by a single

wire
to a diaphragm switch located on the engine.
When
engine
oil pressure is low or zero and the
ignition switch is on, the oil pressure indicator
will

light. When
engine
speed is increased slightly above idle speed, raising the oil pressure to approximately 6 psi. [0,2 kg-cm2], the diaphragm switch
will
open the circuit and the indicator light
will
go out.

A
voltage
regulator maintains a constant
voltage
to the
gauges
in normal operation. On early vehicles,
this
voltage
regulator was mounted on the
rear
of
the instrument cluster. On current vehicles, the
voltage
regulator is integral with the fuel
gauge.

Should
trouble
develop
in the
gauges,
first check the regulator (fuel
gauge
on current production vehicle). If the
voltage
to the regulator is below 10 volts system low
gauge
readings
will
result.
Voltage in
excess
of 16 volts
will
not affect
gauge

readings but may result in premature wear of the
regulator contacts. If the
voltage
to the regulator is

within
the above limits, check the electrical con nections to the regulator (or fuel gauge), especially
the ground connection. If the readings of all the
gauges
is too high, or they all read too low, replace
the regulator (or fuel gauge).

If
the temperature
gauge
or heat indicator in the
instrument cluster have failed, the cause may
originate from the jumper bar shorting out against the instrument case.
Check
the jumper bar
between

the temperature
gauge
and heat indicator at the

rear
of the instrument case. On later production vehicles, the jumper bar is covered with an in
sulating
sleeve
to protect it from shorting out
against the instrument case. If the jumper bar

does
not have this
sleeve,
either install one or

wrap
the bar with plastic electrical tape to
half

an
inch [12,7 mm.] from each end. When installing the jumper bar, be sure the curved
segment
is
closest to the fuel
gauge.

Should
only one of the two
gauges
register incor
rectly,
check the lead wire from the
gauge
to the
sending unit for shorts or open connections. Next disconnect the
gauge
from the sending unit, and
connect the
gauge
to a new fuel tank sending unit

which
has been grounded to the vehicle.
If
the
gauge
registers incorrectly when operating the new unit,
replace the
gauge;
if correctly, replace the sending

unit.

Should
a new fuel tank unit not be available for testing, use a 12-volt
test
light in its place. When
the
gauge
is operating correctly, the pointer
will

move
approximately three-quarters across the
dial.

On
some
vehicles, the temperature
gauge
may
register on or
close
to the H (hot)
mark
when
coolant temperature is
190°F.
to
200°F.
[88°C.
a

93°C.].
In such cases, a 25-ohm,
1-watt
resistor
may be installed on the temperature
gauge
which

will
place the pointer just beyond the center
mark
at a coolant temperature of
190°F.
to
200°F.
Install

the resistor
between
the two terminals on the back
of the
gauge.
Insulate the
exposed
leads of the resistor with electrical tape.

If
the oil pressure indicator
does
not indicate cor

rectly,
first check the light bulb. Next check all
connections and lead wires. If, after all possible

defects
are corrected, the indicator light
does
not go on and off properly, then the diaphragm type
switch in the cylinder block should be replaced.

H-12S.
LIGHTING SYSTEM The
wiring of the lighting systems is shown in
the wiring diagrams, which indicate the various units in relation to their positions in the vehicle.
The
wires in the various circuits are of different
colors or are marked by tracers to aid when check
ing individual circuits.

The
lighting circuits of all models are protected by

an
overload circuit breaker mounted on the back of the main light switch and no replaceable fuse is
required.

The
upper and lower headlight beams are con
trolled by a
foot
switch located on the toe board
to the left of the clutch pedal.
H-126.
Main
Light
Switch

This
switch is a dual functioning unit having two

push-pull
positions and a rotary action. When
pulled out to the first position, the front parking
and
tail
lights are turned on. When pulled all the
way out to the second position, the headlights and
tail
lights are turned on. Rotating the switch to
the right dims the instrument cluster lighting.

The
switch may be removed from the instrument
panel by first loosening the set screw in the control
knob and removing the knob. The retaining nut may then be removed and the switch removed
through the
rear
of the instrument panel.
FIG.
H-51—MAIN
LIGHT
SWITCH
(EARLY)

1—
Battery
4—Parking Lights
2—
Rear
Lights 5—Auxiliary

3—
Head
Lights
212

Page 362 of 376

JEEP DJ 1953 Service Manual
u
MISCELLANEOUS
U-12.
STANDARD
AND
RECOMMENDED TOOLS
(Continued)

Tool
Description
CLUTCH

W-296 Fixture — Adjusting

TRANSMISSION

C-3201
- A
Lo-Jack
— Floor Type

AXLE

C-637

Page 363 of 376

JEEP DJ 1953 Service Manual
Jeep*
UNIVERSAL SERIES
SERVICE
MANUAL

U ENGINE TORQUE SPECIFICATIONS

DAUNTLESS
V-6
ENGINE
Pounds
- Feet
kg-m.

80-110
11,1 a 15,2

30-40
4,2 a 5,5

65-85
9,0 a 11,8
140 Minimu

'Jeep*
UNIVERSAL SERIES
SERVICE
MANUAL

U ENGINE TORQUE SPECIFICATIONS

DAUNTLESS
V-6
ENGINE
Pounds
- Feet
kg-m.

80-110
11,1 a 15,2

30-40
4,2 a 5,5

65-85
9,0 a 11,8
140 Minimum 19,4
18-25 2,5 a 3,4

50-65
6,9 a 9,0
10-16 1,4 a 2,2
14-18 1,9 a 2,5
8-12 1,1 a 1,7

30-40
4,2 a 5,5
6-9 0,8 a 1,2
6-9 0,8 a 1,2

20-30
2,8 a 4,2
10-15 1,4 a 2,1

25-33
3,5 a 4,6
6-9 0,8 a 1,2
17-23 2,4 a 3,2
17-23 2,4 a 3,2

45-55
6,2 a 7,6
15-20 2,1 a 2,8
10-15 1,4 a 2,1
17-23
Lb.
In. 0,195 a
0,265

kg-cm.
17-23 Lb. In. 0,195 a
0,265

kg-cm.
17-23 2,4 a 3,2

50-75
6,9 a 10,4

40-55
5,5 a 7,6
3-5 0,4 a 0,7

25-35
3,5 a 4,8

30-40
4,1 a 5,5
18-25 2,5 a 3,5

30-40
4,2 a 5,5

30-40
4,2 a 5,5
10-12 1,4 a 1,7
10-12 1,4 a 1,7
18-20 2,5 a 2,8

26-30
3,6 a 4,2

30-40
4,2 a 5,5
6-9 0,8 a 1,2
10-15 1,4 a 2,1

30-40
4,2 a 5,5
10-15 1,4 a 2,1

Crankshaft
Bearing Caps to Cylinder Block.
Connecting Rods.

Cylinder
Head to Cylinder Block
Vibration Damper to Crankshaft

Fan
Driving Pulley to Vibration Damper
Flywheel to Crankshaft
Oil
Pan to Cylinder Block

Oil
Pan Drain Plug
Oil
Pump Cover to Timing Chain Cover. . .

Oil
Pump Pressure Valve Cap
Oil
Screen Housing to Cylinder Block
Oil
Pan Baffle to Cylinder Block

Oil
Gallery Plugs.

Filter
Assembly to Pump Cover
Timing
Chain Cover to Block
Water Pump Cover to Timing Chain Cover.

Fan
Driven Pulley Thermostat Housing to Intake Manifold. . . Intake Manifold to Cylinder Head

Exhaust
Manifold to Cylinder Head

Carburetor
to Intake Manifold

Air
Cleaner Stud

Air
Cleaner Wing Nut.

Fuel
Pump to Cylinder Block . . Engine
Mounting
Bracket to Cylinder Block

Fuel
Pump Eccentric and Timing Chain Sprocket to Camshaft
Rocker Arm Cover to Cylinder Head Rocker Arm Shaft Bracket to Cylinder Head
Alternator Bracket to Cylinder Head
Alternator Bracket to Water Pump Timing Chain Cover Alternator
Mounting
Bracket S.O. Alternator to Cylinder Head at Pivot Location.
Starting Motor to Block Starting Motor Bracket to Block
Starting Motor Brace to Starting Motor Distributor
Hold-down
Clamp

Spark
Plugs

Flywheel Housing to Cylinder Block

Timing
Chain Damper to Cylinder Block Bolt.
Bolt — Special
Moveable
Timing Chain Damper
Clutch
to Flywheel

Oil
Filter Element .' 363

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