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1、37-1 GROUP 37 POWER STEERING CONTENTS GENERAL DESCRIPTION. . . . . . . . .37-2 POWER STEERING DIAGNOSIS . . .37-2 INTRODUCTION TO POWER STEERING DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . 37-2 POWER STEERING DIAGNOSTIC TROUBLESHOOTING STRATEGY . . . . . . 37-2 SYMPTOM CHART. . . . . .
2、 . . . . . . . . . . . . . 37-3 SYMPTOM PROCEDURES . . . . . . . . . . . . 37-3 SPECIAL TOOLS. . . . . . . . . . . . . . . .37-12 ON-VEHICLE SERVICE. . . . . . . . . . .37-14 STEERING WHEEL FREE PLAY CHECK . 37-14 STEERING ANGLE CHECK. . . . . . . . . . . . 37-15 TIE ROD END BALL JOINT BREAKAWAY TOR
3、QUE CHECK. . . . . . . . . . . . . . . . . . . . 37-15 STATIONARY STEERING EFFORT CHECK37-16 STEERING WHEEL RETURN TO CENTER CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-17 DRIVE BELT TENSION CHECK. . . . . . . . . 37-17 FLUID LEVEL CHECK . . . . . . . . . . . . . . . . 37-17 POW
4、ER STEERING FLUID REPLACEMENT37-18 POWER STEERING SYSTEM AIR BLEEDING . . . . . . . . . . . . . . . . . . . . . . . . . 37-18 OIL PUMP PRESSURE TEST . . . . . . . . . . 37-19 POWER STEERING PRESSURE SWITCH CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-20 BALL JOINT DUST COVER INSP
5、ECTION 37-20 STEERING COLUMN SHAFT ASSEMBLY SHOCK ABSORBING MECHANISM CHECK37-21 STEERING WHEEL AND SHAFT ASSEMBLY. . . . . . . . . . . . . . . . . . . . .37-22 REMOVAL AND INSTALLATION . . . . . . . . 37-22 DISASSEMBLY AND ASSEMBLY . . . . . . . 37-25 POWER STEERING GEAR BOX ASSEMBLY. . . . . . . .
6、 . . . . . . . . . . . . .37-27 REMOVAL AND INSTALLATION . . . . . . . . 37-27 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 37-31 DISASSEMBLY AND ASSEMBLY . . . . . . . 37-32 POWER STEERING OIL PUMP ASSEMBLY. . . . . . . . . . . . . . . . . . . . .37-45 REMOVAL AND INSTALLATION . . . .
7、. . . . 37-45 DISASSEMBLY AND ASSEMBLY . . . . . . . 37-46 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 37-49 POWER STEERING HOSES . . . . . . .37-49 REMOVAL AND INSTALLATION . . . . . . . . 37-49 SPECIFICATIONS . . . . . . . . . . . . . . .37-52 FASTENER TIGHTENING SPECIFICATIONS37-52
8、GENERAL SPECIFICATIONS . . . . . . . . . . 37-53 SERVICE SPECIFICATIONS . . . . . . . . . . . 37-53 LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . 37-54 SEALANTS . . . . . . . . . . . . . . . . . . . . . . . . . 37-54 GENERAL DESCRIPTION TSB Revision POWER STEERING 37-2 GENERAL DESCRIPTION
9、 M1372000100230 The vehicle uses engine speed-responsive hydraulic power steering. The steering wheel has four spokes. All vehicles are equipped with SRS (Supplemental Restraint Sys- tem). The steering column has a shock absorber mecha- nism and a tilt steering mechanism. A vane-type oil pump with a
10、 fluid flow control system has been included. The steering gear and linkage is rack and pinion type. CONSTRUCTION DIAGRAM AC000757 RETURN HOSE PRESSURE HOSE STEERING WHEEL OIL PUMP SUCTION HOSE AB STEERING COLUMN AND SHAFT STEERING GEAR AND LINKAGE RESERVOIR TANK POWER STEERING DIAGNOSIS INTRODUCTIO
11、N TO POWER STEERING DIAGNOSIS M1372008500179 Hydraulic power steering is used for all vehicles. Faults in the power steering can include excessive play of the steering wheel, difficult steering wheel operation, noise, vibration, and oil leaks, etc. Possi- ble causes of these faults can include defec
12、ts in the gear box, oil pump or steering linkage. POWER STEERING DIAGNOSTIC TROUBLESHOOTING STRATEGY M1372007300172 Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find a power steering fault. 1. Ga
13、ther information from the customer. 2. Verify that the condition described by the customer exists. 3. Find the malfunction by following the Symptom Chart. 4. Verify malfunction is eliminated. POWER STEERING DIAGNOSIS TSB Revision POWER STEERING 37-3 SYMPTOM CHART M1372007600173 SYMPTOMINSPECTION PRO
14、CEDURE REFERENCE PAGE Excessive play of steering wheel1 P.37-3 Difficult steering wheel operation (insufficient power assist) 2 P.37-4 Rattling noise3 P.37-6 Shrill noise4 P.37-6 Squealing noise5 P.37-7 Hissing noise6 P.37-8 Droning noise7 P.37-8 Squeaking noise8 P.37-9 Vibration9 P.37-10 Oil leakag
15、e from hose connection10 P.37-10 Oil leakage from hose assembly11 P.37-10 Oil leakage from oil reservoir12 P.37-11 Oil leakage from oil pump13 P.37-11 Oil leakage from gear box14 P.37-11 SYMPTOM PROCEDURES INSPECTION PROCEDURE 1: Excessive Play of Steering Wheel . DIAGNOSIS STEP 1. Check for loosene
16、ss at the steering shaft coupling section and at the steering wheel linkage. Q:Is there any looseness? YES : Repair or replace the part. Then go to Step 3. NO : Go to Step 2. POWER STEERING DIAGNOSIS TSB Revision POWER STEERING 37-4 STEP 2. Check the steering wheel free play. (1) With engine running (hydraulic operation), set front wheels straight ahead. (2) Measure the play on steering wheel circumference before wheels start to move when slightly moving the steering wheel in both direct
