POWER STEERING GENERAL SERVICING
1988 Jeep Cherokee
Jeep Power Steering General Servicing
Cherokee, Comanche, Grand Wagoneer, Pickup, Wagoneer, Wrangler
Check fluid at every oil change. CHECKING FLUID LEVEL
Check fluid level with engine stopped and fluid hot or cold. Fluid level must be at "FULL-HOT" or "FULL-COLD" mark on dipstick. On models with remote reservoir, keep fluid level 0.5-1.0" from top of reservoir with wheels turned fully to left.
RECOMMENDED FLUID TABLE
Application Part Number
REFILLING & BLEEDING SYSTEM
reservoir to correct level. Operate engine until
fluid reaches normal operating temperature. Stop engine. Add fluid (if
necessary). Turn wheels to full left position. Add fluid to reservoir
to fill to "FULL-COLD" mark on dipstick.
operate engine at fast idle. Recheck reservoir
level. Add to "FULL-COLD" mark on dipstick. Turn wheels from side to
side without contacting stops. Maintain fluid level just above pump
air is removed, return wheels to straight-ahead
position. Operate engine 2-3 minutes. Stop engine. Road test vehicle.
Recheck fluid level. Level should be at "FULL-HOT" position after
system has stabilized. Add fluid (if necessary). DO NOT overfill.
BELT TENSION (Tension in Lbs. Using Boroughs
Application New Belt Used Belt
Jeep (1) 125-155 90-115
(1) - Cherokee, Comanche and Wagoneer is 120-140 lbs.
Refer to TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL TROUBLE SHOOTING section.
tension correct, disconnect power steering pump
pressure hose. Keep hose end raised to prevent fluid loss. Connect
pressure hose of gauge to power steering pump fitting. Connect other
hose from valve side of tester to steering gear inlet.
Open valve. Run engine until fluid reaches normal
operating temperature of 170F (77C). Check fluid level. Add fluid (if necessary).
pressure reading with valve open and engine idling.
Pressure should be 80-125 psi (5.6-8.8 kg/cm).
pressure is above 200 psi (14.1
kg/cm), check hoses
for restrictions and poppet valve (Saginaw gears) for proper assembly.
gate valve completely and reopen 3 times.
highest reading each time. DO NOT close valve for more than 5 seconds.
If pressure is less than specification, clean or replace flow control
valve in pump. If pressures are still low, replace pump.
readings are within specifications and within 50 psi
(3.5 kg/cm) of each other, pump is operating properly. Refer to the
PRESSURE TEST SPECIFICATIONS table. If pressures are high, but do not repeat within 50 psi (3.5 kg/cm), flow control valve in pump is sticking. Remove flow control valve. Clean or replace flow control valve.
pump is within specifications, open valve and turn
steering wheel from right to left stops. Record pressure. DO NOT hold
wheel against stops more than 5 seconds.
should measure the same as specified. See the
PRESSURE TEST SPECIFICATIONS table. If pressure is low, steering gear
is leaking internally and must be overhauled.
steering wheel from left to right with engine idling
at 600-800 RPM. See PRESSURE TEST SPECIFICATIONS table.
pressure is low, momentarily close valve. If pressure
is less than specified, pump is faulty. If pressure is within
specification but was low at previous reading, steering gear is
PRESSURE TEST SPECIFICATIONS TABLE
Application Idle: psi (kg/cm) Relief: psi (kg/cm)
Jeep 80-125 (6-9) 1400-1500 (98-105)