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Home >> Infiniti >> 2004 >> QX56 AWD >> Repair and Diagnosis >> Transmission >> Transfer Case >> Center Case - Disassembly >> Disassembly >> Control Valve

Control Valve

CAUTION:
  • Do not reuse any part that has been dropped or damaged.
  • Make sure valve is assembled in the proper direction.
  • Do not use a magnet because residual magnetism stays during disassembly.
  1. Remove two bolts, and remove oil strainer.
    Fig 1: Removing Oil Strainer
    G02248713Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Remove two O-rings from oil strainer.
    Fig 2: Removing Two O-Rings From Oil Strainer
    G02248714Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Remove control valve assembly bolts.
    Fig 3: Removing Control Valve Assembly Bolts
    G02248715Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Remove snap ring. Then push connector assembly into center case to remove control valve assembly.
    5. Fig 4: Removing Snap Ring
    G02248716Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Remove lip seals from center case.
    CAUTION: There are two kinds of lip seals (lip seal of large inner diameter: 5 pieces, lip seal of small inner diameter: 2 pieces). Confirm the position before disassembly.
    6. Fig 5: Removing Lip Seals From Center Case
    G02248717Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Remove all bolts except for the two as shown.
    7. Fig 6: Removing Bolts
    G02248718Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Remove 4WD solenoid valve, clutch pressure switch, 2-4WD shift solenoid valve, line pressure switch, and transfer fluid temperature sensor from control valve assembly.
    8. Fig 7: Removing 4WD Solenoid Valve
    G02248719Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Remove O-rings from each solenoid valve, switch and terminal body.
  9. Place control valve with lower body facing up, remove two mounting bolts, and then remove lower body and separator plate from upper body.
    Fig 8: Removing Lower Body And Separator Plate From Upper Body
    G02248720Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION: Be careful not to drop relief balls. Detach lower body carefully.
  10. Make sure reverse balls, relief balls and relief springs, accumulator pistons and valve springs are securely installed as shown, and remove them.
    Fig 9: Removing Accumulator Piston, Relief ball, Relief spring, Valve spring, Reverse ball
    G02248723Courtesy of NISSAN MOTOR CO., U.S.A.
  11. Remove retainer plates.
    Fig 10: Removing Retainer Plates
    G02248721Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Remove each control valve, spring and plug.
    Fig 11: Removing Control Valve, Spring And Plug
    G02248722Courtesy of NISSAN MOTOR CO., U.S.A.
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