Check Internal Leakage
CHECK INTERNAL LEAKAGE
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 C and E of PPMU.
7. Loosen lock nut of needle valve D of PPMU and then tighten needle valve D.
8. Lift down the vehicle.
CAUTION:
Check that the lift is fully lowered.
9. Write down a value of the oil pressure gauge after 5 minutes.
10. Tighten needle valve A of PPMU.
11. Loosen lock nut of needle valve B of PPMU and then tighten needle valve B.
12. Loosen needle valve C of PPMU by approximately 2 rotations.
CAUTION:
Never loosen the needle valve more than required.
13. Read a value of oil pressure gauge.
14. Compare difference of reading with pressure reading in step 9.
Pressure difference
0.1 MPa or more : Normal
0.1 MPa or less : Malfunction
15. 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)
16. 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)
17. Loosen pressure reducing valve (A) of oil pressure gauge and lower pressure.
CAUTION:
Be careful since oil drains swiftly from oil drain hole (B).
18. Check that reading of oil pressure gauge is 0 MPa.
19. Remove oil pressure gauge.