LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 124 (Power Steering System) >> Repair Instructions >> Pitman Shaft Over-Center Preload Adjustment - Off Vehicle

Pitman Shaft Over-Center Preload Adjustment - Off Vehicle

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Lash Adjuster Lock Nut
    GM1501450Courtesy of GENERAL MOTORS CORP.
  1. Loosen the lash adjuster lock nut (1).
  2. Turn the pitman shaft adjuster screw counterclockwise until fully extended.
  3. Turn the pitman shaft adjuster screw clockwise 1 full turn.
  4. Rotate the stub shaft from stop to stop, using 12-point socket while counting the number of turns.
  5. Starting at either stop, turn the stub shaft back half the total number of turns. This is the CENTER of the gear.
    6. Fig 2: Identifying Steering Gear Stub Shaft, Pitman Shaft Master Spline & Adjuster Screw
    GM1501452Courtesy of GENERAL MOTORS CORP.
  6. Make sure the gear is centered by checking the following items:
    • The flat on the stub shaft (2) faces upward.
    • The flat on the stub shaft is parallel with the side cover.
    • The master spline (3) on the pitman shaft is in line with the adjuster screw (1).
    7. Fig 3: Rotating The Stub Shaft 45 Degrees From Each Side Of The Center Of The Stub Shaft
    GM1501453Courtesy of GENERAL MOTORS CORP.
  7. Place a torque wrench on the stub shaft with the handle in the vertical position.
  8. Rotate the stub shaft 45 degrees from each side of the center of the stub shaft. The stub shaft must rotate smoothly and must not stick or bind.
  9. Record the worm bearing preload measured on or near the center.
  10. Recorded bearing preload must be 0.7-1.7 N.m (6-15 lb in), with the worm and the ball nut installed. If the torque is outside this range, readjust or repair the steering gear assembly as required.
  11. To obtain the correct preload torque, adjust the over center torque by turning the pitman shaft adjuster screw clockwise.
  12. Add 0.7-1.1 N.m (6-10 lb in) torque to the previously measured worm bearing preload torque.
scientia non olet · About LEMON Manuals