Power Steering Gear Diagnosis - Jeep 1987 Wrangler Workshop Manual

STEERING AND FRONT AXLE
POWER STEEBliG GEAR
POWER STEERING GEAR DIAGNOSIS
SERVICE DIAGNOSIS
•
Condition Possible Cause Correction
HISSING NOISE IN
S T E E R I N G G E A R
(1)
There
i s
some
n o i s e in
all
power
steering s y s t e m s . One of the
most common i s a hissing
sound most evident at standstill
parking. There is no relation-
ship between this noise and per-
formance of the steering. Hiss
may be expected when steering
wheel is at end of travel or when
slowly turning at standstill.
(1) Slight hiss is normal and in no way
affects steering. Do not replace
valve unless hiss is extremely ob-
jectionable. A replacement valve
will also exhibit slight noise and is
not always a cure. Investigate
clearance around flexible coupling
rivets. Be sure steering shaft and
gear are aligned so flexible coup-
ling rotates in a flat plane and is not
distorted a s shaft rotates. Any
metal-to-metal contacts through
flexible coupling will transmit valve
hiss into passenger compartment
through the steering column.
RATTLE OR C H U C K L E
NOISE IN S T E E R I N G
G E A R
(1) Gear loose on frame.
(2) Steering linkage looseness.
(3) Pressure hose touching other
parts of car.
(4) Loose pitman shaft over center
adjustment.
NOTE: A slight rattle may occur on
turns because of increased clear-
ance off the "high point." This is
normal and clearance must not be
reduced below specified limits to
eliminate this slight rattle.
(5) Loose pitman arm.
(1) Check gear-to-frame mounting
screws. Tighten screws to 88 N-m
(65 foot pounds) torque.
(2) Check linkage pivot points for
wear. Replace if necessary.
(3) Adjust hose position. Do not bend
tubing by hand.
(4) Adjust to specifications.
(5) Tighten pitman arm nut to speci-
fications.
SQUAWK NOISE IN
STEERING GEAR
WHEN TURNING OR
RECOVERING FROM A
TURN
(1) Damper O-ring on valve spool
cut.
(1) Replace damper O-ring.
POOR RETURN O F
STEERING WHEEL TO
CENTER
(1) Tires not properly inflated.
(2) Lack of lubrication in linkage
and ball joints.
(3) Lower coupling flange rubbing
against steering gear adjuster
p l u g .
(4) Steering gear to column mis-
alignment.
(1) Inflate to specified pressure.
(2) Lube linkage and ball joints.
(3) Loosen pinch bolt and assemble
properly.
(4) Align steering column.
84765
G-74