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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 154 (Steering System) >> Basic Inspection >> Power Steering Oil Pump >> Inspection >> Relief Oil Pressure

Relief Oil Pressure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Make sure that belt tension is normal before starting the following procedure.
  1. Connect Tool between power steering oil pump discharge port and high-pressure hose. Bleed air from hydraulic circuit while opening valve fully. Refer to Refilling and Air Bleeding Hydraulic System .
    G04887320Courtesy of NISSAN NORTH AMERICA, INC.

    Tool

    : KV48103500 (J-26357)

    : KV48102500 (J-33914)
  2. Start engine. Run engine until oil temperature reaches 50° to 80°C (122° to 176°F).
    CAUTION:
    • Leave valve of oil pressure gauge fully open while starting and running engine. If engine is started with valve closed, hydraulic pressure in power steering oil pump goes up to relief pressure along with unusual increase of oil temperature.
    • Be sure to keep hose clear of belts and other parts when engine is started.
  3. Fully close Tool valve with engine at idle and measure the relief oil pressure.

    Relief oil pressure

    : Refer to Power Steering Oil Pump .
    CAUTION: Do not keep valve closed for longer than five seconds.
  4. Open valve slowly after measuring. Replace power steering oil pump if relief oil pressure is outside specification. Refer to Removal and Installation - Cummins 5.0  or Removal and Installation - VK56VD .
  5. After inspection, disconnect Tool from hydraulic circuit.
  6. Apply power steering fluid or equivalent to copper washers.
    GNSAWGIA0415Z-415Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Do not reuse copper washers.
  7. For Cummins 5.0 power steering pump, install eye bolt (B), copper washers (2), and high pressure hose (3) to power steering oil pump (1) with protrusion (A) aligned with cutout in power steering oil pump outlet connection.
  8. For VK56VD power steering pump, install eye bolt (B), copper washers (2), and high pressure hose (3) to power steering oil pump (1) with protrusion (A) aligned with cutout in power steering oil pump outlet connection.
    GNSALGIA0295Z-295Courtesy of NISSAN NORTH AMERICA, INC.
  9. Tighten eye bolt finger-tight.
  10. Tighten eye bolt to specification. Refer to Exploded View .
  11. Check fluid level, fluid leaks and air bleed hydraulic system after installation. Refer to Refilling and Air Bleeding Hydraulic System .
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