Power Steering Pump-Initial Operation; Pressure Test Gauge - Jeep Wrangler 1997 Manual

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DIAGNOSIS AND TESTING (Continued)
Fig. 2 Pressure Test Gauge
9519-1
gauge and to get air out of the fluid. Then shut off
engine.
(6) Check fluid level, add fluid as necessary. Start
engine again and let idle .
(7) Gauge should read below 862 kPa (125 psi) if
above, inspect the hoses for restrictions and repair as
necessary. The initial pressure reading should be in
the range of 345-552 kPa (50-80 psi) .
CAUTION : The following test procedure involves
testing maximum pump pressure output and flow
control valve operation . Do not leave valve closed
for more than three seconds as the pump could be
damaged.
(8) Close valve fully three times for three seconds
and record highest pressure indicated each time. All
three readings must be above specifications
and within 345 kPa (50 psi) of each other.
*Pressures above specifications but not within
345 kPa (50 psi) of each other, replace pump .
" Pressures within 345 kPa (50 psi) of each other
but below specifications, replace pump.
NOTE : Refer to pump relief pressure chart.
CAUTION : Do not force the pump to operate
against the stops for more than 2 to 4 seconds at a
time because, pump damage will result.
(9) Open the test valve, turn steering wheel
extreme left and right positions against the stops.
Record the highest indicated pressure at each posi-
tion . Compare readings to specifications . If highest
output pressures are not within 50 psi . against either
stop, the gear is leaking internally and must be
repaired.
PUMP LEAKAGE DIAGNOSIS
1 . BUSHING (BEARING) WORN, SEAL WORN . REPLACE
PUMP.
2. REPLACE RESERVOIR O-RING SEAL.
3. TORQUE HOSE FITTING NUT TO SPECIFICATIONS . IF
LEAKAGE PERSISTS, REPLACE O-RING SEAL.
4. TORQUE FITTING TO SPECIFICATIONS . IF LEAKAGE
PERSISTS, REPLACE O-RING SEAL.
5. REPLACE PUMP.
6. CHECK OIL LEVEL: IF LEAKAGE PERSISTS WITH THE
LEVEL CORRECTAND CAP TIGHT, REPLACE THE
CAP.
SERVICE PROCEDURES
STEERING 19- 5
POWER STEERING PUMP-INITIAL OPERATION
80atc3c3
WARNING : THE FLUID LEVEL SHOULD BE
CHECKED WITH ENGINE OFF TO PREVENT INJURY
FROM MOVING COMPONENTS.
CAUTION : Use MOPAR Power Steering Fluid or
equivalent . Do not use automatic transmission fluid
and do not overfill .
Wipe filler cap clean, then check the fluid level .
The dipstick should indicate COLD when the fluid is
at normal temperature .
(1) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two (2) minutes .
(2) Start the engine and let run for a few seconds
then turn engine off.
(3) Add fluid if necessary. Repeat the above proce-
dure until the fluid level remains constant after run-
ning the engine .
(4) Raise the front wheels off the ground.
(5) Slowly turn the steering wheel right and left,
lightly contacting the wheel stops at least 20 times.
ENGINE RELIEF PRESSURE ± 50
2 .5L 9653 kPa (1400 psi)
4 .OL 9653 kPa (1400 psi)