LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control System >> Basic Inspection >> HBMC >> Check Orifice For Clogging >> Work Procedure

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: 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.
    GNSDB147121Courtesy of NISSAN NORTH AMERICA, INC.
    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.
    GNSDB147066Courtesy of NISSAN NORTH AMERICA, INC.
    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, C, and E of PPMU.
  7. Lift down the vehicle.
    CAUTION:

    Check that the lift is fully lowered.

  8. Loosen pressure reducing valve (A) of oil pressure gauge and then lower pressure.
    GNSDB146901Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION:

    Be careful since oil drains swiftly from oil drain hole (B).

  9. Check that reading of oil pressure gauge is 0 MPa. Close pressure reducing valve.
  10. Loosen needle valve E of PPMU by approximately 2 rotations.
    CAUTION:

    Never loosen the needle valve more than required.

  11. Write down a value of the oil pressure gauge.
  12. Tighten needle valve E of PPMU.
  13. Loosen pressure reducing valve of oil pressure gauge and then lower pressure.
    CAUTION:

    Be careful since oil drains swiftly from oil drain hole.

  14. Check that reading of oil pressure gauge is 0 MPa. Close pressure reducing valve.
  15. Loosen needle valve A of PPMU by approximately 2 rotations.
    CAUTION:

    Never loosen the needle valve more than required.

  16. Read a value of the oil pressure gauge after 5 minutes.
  17. Compare difference of reading with pressure reading in step 11.
    Pressure difference
      0.2 MPa or more : Replace the PPMU. Refer to PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Removal and Installation .
      0.2 MPa or less : Normal
  18. Tighten needle valve A of PPMU.
  19. Loosen pressure reducing valve of oil pressure gauge and then lower pressure.
    CAUTION:

    Be careful since oil drains swiftly from oil drain hole.

  20. Check that reading of oil pressure gauge is 0 MPa. Close pressure reducing valve.
  21. Loosen needle valve C of PPMU by approximately 2 rotations.
    CAUTION:

    Never loosen the needle valve more than required.

  22. Read a value of the oil pressure gauge after 5 minutes.
  23. Compare difference of reading with pressure reading in step 11.
    Pressure difference
      0.2 MPa or more : Replace the PPMU. Refer to PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Removal and Installation .
      0.2 MPa or less : Normal
  24. Tighten needle valve C of PPMU.
  25. Loosen pressure reducing valve of oil pressure gauge and then lower pressure.
    CAUTION:

    Be careful since oil drains swiftly from oil drain hole.

  26. Check that reading of oil pressure gauge is 0 MPa.
  27. Remove oil pressure gauge.
  28. 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)
scientia non olet · About LEMON Manuals