Jeep J-10 Series 1982 Technical & Service Manual page 922

2L-10 POWER STEERING GEAR AND PUMP
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Service Diagnosis—Steering Gear and Pump (Continued)
Condition Possible Cause Correction
FOAMING AERATED
(1)
Air in fluid, and loss of fluid
(1)
Check for leak and correct. Bleed
POWER STEERING
due to pump internal leakage
system. Extremely cold tempera
FLUID, LOW FLUID
causing overflow.
tures will cause system aeration
LEVEL AND should the oil level be low. If oil
POSSIBLE LOW level is correct and pump still
PRESSURE
foams, remove pump from ve
hicle and separate reservoir from
housing. Check welsh plug and
housing for cracks. If plug is
loose or housing is cracked, re
place housing.
LOW PRESSURE DUE
(1) Flow control valve stuck or in (1)
Remove burrs or dirt or replace.
TO STEERING PUMP
operative.
Flush system.
(2)
Pressure plate not flat against
cam ring.
(2) Correct.
(3)
Extreme wear of cam ring.
(3)
Replace parts. Flush system.
(4)
Scored pressure plate, thrust
plate, or rotor.
(4)
Replace parts. Flush system.
(5)
Vanes not installed properly.
(5)
Install properly.
(6)
Vanes sticking in rotor slots.
(6)
Freeup by removing burrs, varnish,
or dirt.
(7) Cracked or broken thrust or
pressure plate.
(7)
Replace part.
LOW PRESSURE DUE
(1)
Pressure loss in cylinder due to
(1)
Remove gear for disassembly
TO STEERING GEAR
worn piston ring or badly wom
housing bore.
and inspection of ring and
housing bore.
(2)
Leakage at valve rings, valve
body-to-worm seal.
(2)
Remove gear for disassembly
and replace seals.
60702b.
LEAK DIAGNOSIS
The actual source of power steering system fluid leaks
should always be determined before attempting repair.
Because inaccurate diagnosis can lead to ineffective re
pair, proper inspection procedures are necessary. The
most common fluid leak sources are shown in figures
2L-6, 2L-7, and 2L-8.
Inspection Procedure
(1) Raise front of vehicle.
(2) Clean exterior surfaces of steering gear, pump,
hoses, and fittings thoroughly.
(3) Check pump fluid level. Add or remove fluid as
necessary.
(4) Check for aerated fluid (orange in color and full
of bubbles) which can cause overflow from reservoir and
be mistaken for leak.
(5) Check and tighten all hose connections at gear
and pump. Do not exceed 30 foot-pounds (41 N«m)
torque at any fitting.
(6) Start engine. Have helper turn steering wheel
left and right several times while locating source of leak.
Contact steering stops momentarily in each direction
when turning wheel.
(7) Stop engine when leak source is identified.
Leak Diagnosis and Correction—Steering Gear
NOTE: Refer to figures 2L-6 and 2L-7 for an illustra
tion ofsteering gear leak sources.