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DIAGNOSIS AND TESTING POWER STEERING SYSTEM DIAGNOSIS CHARTS STEERING NOISE 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 CONDITION POSSIBLE CAUSES CORRECTION OBJECTIONAL HISS OR 1. Steering intermediate shaft to dash panel 1. Check and repair seal at dash 2. Noisy valve in power steering gear. 2. Replace steering gear. RATTLE OR CLUNK 1. Gear mounting bolts loose. 1. Tighten bolts to specification. 2. Loose or damaged suspension 2. Inspect and repair suspension. 3. Loose or damaged steering linkage. 3. Inspect and repair steering 4. Internal gear noise. 4. Replace gear. 5. Pressure hose in contact with other 5. Reposition hose. CHIRP OR SQUEAL 1. Loose belt. 1. Adjust or replace. 2. Belt routing. 2. Verify belt routing is correct. WHINE OR GROWL 1. Low fluid level. 1. Fill to proper level. 2. Pressure hose in contact with other 2. Reposition hose. 3. Internal pump noise. 3. Replace pump. 4. Air in the system. 4. Perform pump initial operation. SUCKING AIR SOUND 1. Loose return line clamp. 1. Replace clamp. 2. O-ring missing or damaged on hose 2. Replace o-ring. 3. Low fluid level. 3. Fill to proper level. 4. Air leak between pump and reservoir. 4. Repair as necessary. SCRUBBING OR 1. Wrong tire size. 1. Verify tire size. 2. Wrong gear. 2. Verify gear. 19 - 2 STEERING WJ |