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 (SST: KV-40108000) jack with steam before use.
1.Remove protector of PPMU.
2.Remove cap of oil injection jack.





3.Install an oil pressure gauge (SST: KV-40108000) (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 Nm (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 Nm (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.