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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control System >> Basic Inspection >> HBMC >> Pressure Reducing Method >> 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. 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).

  7. Check that reading of oil pressure gauge is 0 MPa.
  8. 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)