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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control System >> Basic Inspection >> HBMC >> Check System Pressure >> 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. Lift up the vehicle.
  2. Remove protector of PPMU.
  3. Remove cap of oil injection jack.
  4. 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.
  5. 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.

  6. Refer to the illustration and check the specified pressure.
    GNSDB147021Courtesy of NISSAN NORTH AMERICA, INC.
  7. 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)
  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.
  10. Remove oil pressure gauge.
  11. Install cap of oil injection jack.
  12. Install protector of PPMU. Refer to PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : .
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