Service Manual

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Figure 24
1. Barrel 6. Head 10. O–ring seal
2. Shaft 7. Retaining ring 1
1. Piston
3. Dust seal 8. Backup ring 12. Nut
4. Backup ring 9. O–ring seal 13. W
arning decal
5. O–ring seal
Inspection 4. Install retaining ring (Item 7) to secure assembly in
barrel. To install retaining ring, align key slot in head with
1. Inspect head (Item 6), piston (Item 1
1) and shaft (Item
access groove in barrel. Rotate head clockwise as far as
1) for excessive scoring, pitting or wear. Replace any
the retaining ring will allow
. Offset end of retaining ring
worn or damaged parts.
will be against left side of barrel groove as shown.
2. Inspect inside of barrel for scoring, pitting or out–of–
round and replace if worn or damaged.
Assembly
1. Use a new repair kit (Items 3 – 5 & 8
– 10) to replace
all o–rings. seals and back–up rings. Apply clean hy-
draulic oil to all o–rings, seals, back–up rings before
installing.
2. Install head (Item 6) with new seals onto shaft (Item
2
). Install piston (Item 11) with new seals and back–ups
onto shaft. Install piston onto shaft and secure with nut
(Item 12).
3. Coat all cylinder parts with clean hydraulic oil. Slide
shaft assembly and head into barrel, being careful not to
Figure 25
Retaining ring
side of barrel groove
after installing)
Spanner wrench
(Offset end against left
damage seals.
Installing retaining ring
Hydraulic System Page 9 – 26 Workman 3000/4000 Series