Removal & Installation
- Place the front wheels in a straight-ahead position. Place a drain pan under the steering gear.
- Disconnect the fluid hoses from the steering gear. Raise and secure the hoses above the level of the pump to prevent excess steering fluid loss. Plug the hoses to prevent the entry of dirt.
- Disconnect the steering shaft from the gear.
- Raise and support the truck on jackstands.
- Disconnect the center link from the pitman arm.
- Remove the front stabilizer bar.
- Remove the pitman arm nut. Matchmark the arm and shaft, and remove the arm with a puller.
- Unbolt and remove the gear.
Installation is the reverse of removal. The pitman arm nut MUST be securely staked. Observe the following torque specifications:
Steering gear-to-frame: 65 ft. lbs. (88 Nm)
Adjust the wormshaft bearing preload and pitman shaft overcenter drag torque in the order listed below. Failure to follow the procedures exactly may result in gear failure.
- Ensure the wormshaft bearing adjustment cap is seated. Score an index mark on the steering gear housing adjacent to one of the spanner wrench tightening holes.
- Measure counterclockwise 0.19-0.23 in. (5-6mm) from the index mark and score an adjustment reference mark on the housing. Rotate the adjustment cap counterclockwise until the spanner wrench tightening hole in the cap is aligned with the adjustment reference mark on the housing.
- Install the adjustment cap locknut and tighten to 85 ft. lbs. (115 Nm). Ensure that the adjustment cap does not rotate. Rotate the stub shaft clockwise to the stop, then rotate it counterclockwise 1 / 4 of a turn.
- Measure the preload torque by rotating at a constant speed with a inch pound torque wrench installed. It should be between 4-10 inch lbs.
- Rotate the pitman shaft adjustment screw counterclockwise until it is fully extended, then rotate it 180° clockwise. Rotate the stub shaft from stop-to-stop counting the number of turns. Turn the wheel back, 1 / 2 the number of turns. Make sure the steering gear is centered. The flat area on the stub shaft should face upward and be parallel with the adjustment screw cover.
- Measure the drag by rotating the stub shaft 45° on each side of vertical and record the highest drag torque measured at or near the steering gear center position.
Specifications are as follows:
New Gears: 4-8 inch lbs. greater than wormshaft bearing preload, to a maximum of 18 inch lbs.
- If necessary, rotate the pitman shaft adjustment screw until the correct torque is obtained. Tighten the locknut to 20 ft. lbs. (27 Nm). DO NOT allow the adjustment screw locknut to rotate.