Check For Malfunction

CHECK FOR MALFUNCTION


Work Procedure


CAUTION:
- Clean surrounding areas of oil injection jack using steam before starting operation, since there may be mud on it.
- Clean oil pressure gauge (special service tool: KV40108000) jack with steam before use.
1. Remove protector of PPMU.
2. Remove cap of oil injection jack.





3. Install an oil pressure gauge (SST: KV40108000) (A) to oil injection jack.

CAUTION:
- Jack must be securely inserted until a click sound can be heard.
- Pressure reducing valve (B) of the oil pressure gauge must be closed.





4. Loosen needle valves A, C, and E of PPMU by approximately 2 rotations.

CAUTION:
Never loosen the needle valve more than required.
5. Lift up the vehicle.

CAUTION:
Check that tires never contact the ground.
6. Tighten needle valves A and C of PPMU.
7. Loosen lock nuts of needle valves B and D of PPMU and then tighten needle valves B and D.
8. Write down a value of the oil pressure gauge.
9. Lift down the vehicle.

CAUTION:
Check that the lift is fully lowered.
10. Read a value of oil pressure gauge.
11. Compare difference of reading with pressure reading in step 8.

Pressure change
Pressure increases : PPMU malfunction
Pressure does not change : Shock absorber malfunction

12. Tighten needle valves A, C, and E of PPMU to the specified torque.

Tightening torque : 8.3 N-m (0.85 kg-m, 73 in-lb)

13. Loosen needle valves B and D of PPMU by approximately 2 rotations and then tighten lock nut to the specified torque.

CAUTION:
Never loosen the needle valve more than required.

Tightening torque : 20 N-m (2.0 kg-m, 15 ft-lb)





14. Loosen pressure reducing valve (A) of oil pressure gauge and then lower pressure.

CAUTION:
Be careful since oil drains swiftly from oil drain hole (B).
15. Check that reading of oil pressure gauge is 0 MPa.
16. Remove oil pressure gauge.