Jeep cherokee 2000 Service Manual page 882

19 - 2 STEERING
DIAGNOSIS AND TESTING
POWER STEERING SYSTEM DIAGNOSIS CHARTS
There is some noise in all power steering systems. One of the most common is a hissing sound evident at a
standstill parking. Or when the steering wheel is at the end of it's travel. Hiss is a high frequency noise similar
to that of a water tap being closed slowly. The noise is present in all valves that have a high velocity fluid passing
through an orifice. There is no relationship between this noise and steering performance.
CONDITION
OBJECTIONAL HISS OR
WHISTLE
RATTLE OR CLUNK
CHIRP OR SQUEAL
WHINE OR GROWL
SUCKING AIR SOUND
SCRUBBING OR
KNOCKING
STEERING NOISE
POSSIBLE CAUSES
1. Steering intermediate shaft to dash panel
seal.
2. Noisy valve in power steering gear.
1. Gear mounting bolts loose.
2. Loose or damaged suspension
components/track bar.
3. Loose or damaged steering linkage.
4. Internal gear noise.
5. Pressure hose in contact with other
components.
1. Loose belt.
1. Low fluid level.
2. Pressure hose in contact with other
components.
3. Internal pump noise.
4. Air in the system.
1. Loose return line clamp.
2. O-ring missing or damaged on hose
fitting.
3. Low fluid level.
4. Air leak between pump and reservoir.
1. Wrong tire size.
2. Wrong gear.
CORRECTION
1. Check and repair seal at dash
panel.
2. Replace steering gear.
1. Tighten bolts to specification.
2. Inspect and repair suspension.
3. Inspect and repair steering
linkage.
4. Replace gear.
5. Reposition hose.
1. Adjust or replace.
1. Fill to proper level.
2. Reposition hose.
3. Replace pump.
4. Perform pump initial operation.
1. Replace clamp.
2. Replace o-ring.
3. Fill to proper level.
4. Repair as necessary.
1. Verify tire size.
2. Verify gear.
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