Exploded View: Disassembly
- Remove the boot bands (A) and tie-rod clips (B). Pull the boot away from the ends of the steering gearbox.
- Unbend the lock washer (A).
- Hold the flat surface sections (A) of the steering rack with a wrench (B), and unscrew both rack ends (C) with another wrench (D). Be careful not to damage the rack surface with the wrench.
- Remove the lock washer (E) and stop rubber (F).
- Loosen the locknut (A), then remove the rack guide screw (B).
- Remove the spring (C) and the rack guide (D) from the gearbox housing.
- Remove the cylinder lines from the gearbox.
- Drain the fluid from the cylinder fittings by slowly moving the steering rack back and forth.
- Remove the two flange bolts, then remove the valve body unit (A) from the gearbox (B). Remove the O-ring (C), and discard it.
- Drill a 3 mm (0.12 in.) diameter hole about 2.5-3.0 mm (0.10-0.12 in.) in depth in the staked point (A) on the cylinder. Do not allow metal shavings to enter the cylinder housing. After removing the cylinder end (B), remove any burrs at the staked point.
- Hold the gearbox housing using a C-clamp (commercially available) (A) and the wooden blocks (B) as shown. Do not clamp the cylinder part of the gearbox housing in the vise. Then remove the cylinder end (C).
- Install a commercially available bearing separator (A) in the gearbox housing as shown in Fig 9.
- Place an appropriate size deep socket wrench (B) on the steering rack (C).
- Set the steering gearbox in a press so the gearbox housing side points upward, then press the cylinder end seal (D) and steering rack out of the gearbox. Hold the steering rack to keep it from falling when pressed clear. Be careful not to damage the inner surface of the cylinder housing with the tool.
- Install the special tool so it will fit through the rack guide hole of the gearbox housing. Insert a 24" long, 3/8" drive extension (A), and install it on the special tool. Make sure the special tool is securely positioned on the backup ring edges. Be careful not to damage the inner surface of the cylinder with the special tool.
- Place the steering gearbox in a press, then remove the cylinder end seal (A) and backup ring (B) from the gearbox by pressing on the 24" long, 3/8" drive extension.
Note these items when pressing the cylinder end seal:
- Keep the tool straight to avoid damaging the cylinder wall. Check the tool angle, and correct it if necessary, when removing the cylinder end seal.
- Use a press to remove the cylinder end seal. Do not try to remove the seal by striking the tool; striking the tool could break the backup ring, and the cylinder end seal would remain in the gearbox.
- Carefully pry the piston seal ring (A) and O-ring (B) off the rack piston. Be careful not to damage the inside of the seal ring groove and piston edges when removing the seal ring.
- Before removing the valve housing (A), apply vinyl tape (B) to the splines on the pinion shaft.
- Separate the valve housing from the pinion shaft/ valve using a press.
- With your finger, check the inner wall of the valve housing where the seal ring slides. If there is a step in the wall, the housing is worn. Replace it.NOTE: There may be sliding marks from the seal ring on the wall of the valve housing. Replace the valve housing only if the wall is stepped.
- Check for wear, burrs, and other damage to the edges of the grooves in the sleeve.NOTE: The pinion shaft and sleeve are a precision matched set. If either the pinion shaft or sleeve must be replaced, replace both parts as a set.
- Remove the snap ring (A) and sleeve (B) from the pinion shaft.
- Using a cutter or an equivalent tool, cut and remove the four seal rings from the sleeve. Be careful not to damage the edges of the sleeve grooves and outer surface when removing the seal rings.
- Using a cutter or an equivalent tool, cut the valve seal ring (A) and O-ring (B) at the cutting groove position (C) in the pinion shaft. Remove the valve seal ring and O-ring. Be careful not to damage the edges of the pinion shaft groove and outer surface when removing the valve seal ring and O-ring.
- Remove the valve oil seal (A) and wave washer (B) from the pinion shaft.
Note these items during disassembly:
- Inspect the ball bearing (C) by rotating the outer race slowly. If there is any excessive play or wear, replace the pinion shaft and sleeve as an assembly.
- The pinion shaft and sleeve are a precise fit; do not intermix old and new pinion shafts and sleeves.
- Press the valve oil seal (A) and roller bearing (B) out of the valve housing using a hydraulic press and special tool.
- Clean the disassembled parts with solvent, and dry them with compressed air. Do not dip rubber parts in the solvent.