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 (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 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.





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





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 Nm (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.