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DIAGNOSIS AND TESTING POWER STEERING SYSTEM 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 STEERING NOISE 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. Internal gear noise. 3. Replace steering gear. 4. Pressure hose in contact with other 4. Reposition hose. 5. Loose or damaged intermediate shaft or 5. Inspect and repair or replace. CHIRP OR SQUEAL 1. Loose belt. 1. Adjust or replace. 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 fluid 4. Check for lekas, Evacuate air 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. 5. Reservoir cap not installed correctly. 5. Install reservoir cap correctly. SCRUBBING OR 1. Wrong tire size. 1. Verify tire size. 19 - 2 STEERING DR/DH |