Jeep 1987 Wrangler Workshop Manual page 868

STEERING AND FRONT AXLE
POWER STEERING PUMP
S E E
I.S,
N
O
T
E
S
If pressures are within? 584 to 8 274 kPa (1100-
1200 psi) and the three readings do not vary by
more than 345 kPa (50 psi), the pump is
functioning within specifications.
For example, if pressures are 7 929, 7 998,
8 067 kPa, (1150, 1160, 1170 psi), pressure
variance range is within 345 kPa (50 psi) and
pump operation is OK.
If pressures recorded are high but do not repeat
within 345 kPa (50 psi), the flow control valve (A)
is sticking.
Remove and clean the valve (A). Remove any
burrs with crocus cloth. If the system contains
dirt, flush the system.
NOTE: The power steering system is a closed
system. Contamination of fluid in either the
pump or gear will be circulated into the other
unit. If the system is exceptionally dirty, the
pump and gear must be disassembled and
cleaned and all hoses removed and flushed.
8481OA
If pump pressure is OK with the gauge valve
open but low with the gauge valve closed, check
the steering gear for internal leakage as follows:
Turn the steering wheel to the left and right stops
and record highest pressure Compare the
gauge readings with maximum pump output. If
pump output cannot be repeated at either side of
the gear, the steering gear is leaking internally
and must be repaired.
Stop the engine and remove the test gauge.
Connect the pressure hose to the pump (or
gear).
Make the necessary repairs and correct the fluid
level.
Remove the drip pan.
G-98