Examination
1. Lay down an absorbent cloth to prevent splashing of the working fluid.
2. Turn away a bolt of fastening of a collar of a pipe of a high pressure to the steering booster pump.
3. Loosen the fastening of the high pressure pipe to the power steering pump and remove the pipe.
4. Models with K1.8 engine: Install adapter LRT-57-034A to the power steering pump high pressure connection.
5. Models with KV6 and Td4 engines: Install adapter LRT-57-042 to the high pressure connection of the power steering pump.
6. Connect adapter LRT-57-035 to existing high pressure piping.
7. Attach tubing LRT-57-002 to each adapter.
8. Connect pressure gauge LRT-57-005 to test valve LRT-57-001
9. Connect hoses LRT-57-002 to valve LRT-57-001 and tighten connections.
10. Check for fluid leaks from the power steering system and test equipment connections.
11. During the test, maintain the required level of working fluid in the hydraulic booster reservoir.
12. Open the test valve and start the engine.
13. The pressure at idle speed of the engine should be within 5-7 bar.
14. With the engine idling, slowly turn the steering wheel to its full position and hold it.
15. Repeat the operation by turning the steering wheel in the opposite direction.
16. During the test, when turning the steering wheel, the pressure of the working fluid should increase sharply and continue to increase until the steering wheel is turned to the extreme position. Refer to the General Specifications section for information on hydraulic fluid pressure at the steering wheel end position.
TECHNICAL DATA, Steering.
17. With the engine idling, release the steering wheel. Refer to the General Specifications section for information on fluid pressure when the engine is idling.
TECHNICAL DATA, Steering.
18. If the pressure is higher than the allowable value, this indicates a malfunction.
19. To determine if there is a problem with the pump or steering assembly, close the valve for a maximum of 5 seconds.
WARNING: If the valve is kept closed for longer, the power steering pump may fail.
20. If the dial indicator shows that the pressure is not correct, then the pump may be faulty.
21. If the pressure at the outlet of the power steering pump is normal, and the steering wheel turns with difficulty when the engine is idling and becomes more "easy" when the crankshaft speed increases, then the pump characteristic may not be correct.
22. If the maximum pressure at the pump outlet is correct, then the steering mechanism may be faulty.
23. When the test is complete, stop the engine and remove the test equipment.
24. Clean the power steering pump and pipe union.
25. Install a new O-ring on the high-pressure pipe end, connect the pipe to the pump and tighten the union nut to 25 Nm.
26. Install the high pressure pipe clamp bolt and tighten to 8 Nm.
27. Check the level of the working fluid in the reservoir of the power steering and, if necessary, bring it to normal.
MAINTENANCE, MAINTENANCE, Intermediate final drive (IRD) - for vehicles not supplied to the USA and Canada.
Comments on this article