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57 STEERING 2 FAULT DIAGNOSIS POWER STEERING SYSTEM - TEST NOTE: If steering lacks power assistance. diagnosis chart to assist in tracing faults. A. Steering box. B. Steering pump. C. Existing hose, steering box to pump. D. Hose LRT-57-030. E. Test adaptor LRT-57-001. F. Pressure gauge LRT-57-005. G. Thread adaptor LRT-57-004. H. Thread adaptor LRT-57-022. Procedure 1. A hydraulic pressure gauge and test adaptor is used to test power steering system. This gauge 2 . The maximum power steering system pressure is 77 kgf/cm 2 . 2. Some fault conditions of hydraulic pump may obtain pressures up to 105 kgf/cm 2 . Pressure on gauge is same pressure being exerted upon 3. Check and maintain maximum fluid level of reservoir. 4. Examine power steering units and connections for leaks. All leaks must be rectified before 5. Check steering pump drive belt tension. See ENGINE, Repair, Drive Belt 6. Assemble test equipment and fit to vehicle, as shown in RR3959M. 7. Open tap of adaptor. pressure gauge. 9. With system in good condition, pressures should be: (A) Steering wheel held on full lock and engine 2 . (B) Steering wheel held on full lock and engine 2 . Checks should be carried out on both full lock CAUTION: Do not maintain this pressure possibly damaging seals. 10. Release steering wheel and with engine idling. Pressure should read below 7 kgf/cm 2 . 11. If pressures differ to those given a fault exists. Close adaptor tap for a maximum five seconds. 13. If gauge does not register specified pressure, pump is faulty. 14. Fit a new pump, bleed system and repeat test. If low pressure or a substantial imbalance exists, |