Disassembly
TOOL REQUIRED- 07NAD-SR3020A Cylinder End Seal Remover Attachment
- 07GAF-PH70100 Pilot Collar
NOTE:
- Clean the disassembled parts with a solvent, and dry them with compressed air. Do not dip the rubber parts in a solvent.
- Always replace the Wrings and rubber seals with new ones before assembly.
1. Before removing the valve housing, apply vinyl tape to splines of the pinion shaft.
2. Separate the valve housing from the pinion shaft/valve using a press.
3. Check the inner wall of the valve housing where the seal ring slides with your finger. If there is a step in the wall, the valve housing is worn. Replace the valve housing.
NOTE:
- There may be the sliding marks from the seal ring on the wall of the valve housing. Replace the valve housing only if the wall is stepped.
- When the valve housing is replaced, install new shim(s) on the bearing surface of the housing to adjust the thickness.
4. 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.
5. Remove the circlip and pinion shaft sleeve from the pinion shaft.
6. Using a cutter or an equivalent tool, cut and remove the four seal rings from the sleeve.
CAUTION: Be careful not to damage the edges of the sleeve grooves and outer surface when removing the seal rings.
7. Using a cutter or an equivalent tool, cut the valve seal ring and O-ring at the groove the pinion shaft. Remove the valve seal ring and O-ring.
CAUTION: Be careful not to damage the edges of the pinion shaft groove and outer surface when removing the valve seal ring and O-ring.
8. Remove the valve oil seal and backup ring from the pinion shaft.
NOTE:
- Inspect the ball bearing by rotating the outer race slowly. If there is any excessive play, 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.
9. Press the valve oil seal and roller bearing out of the valve housing using a hydraulic press and special tool shown below.