Service Manual

Lift Cylinder Repair
1
2
3
4
5
6
7
8
9
10
11
12
8
8
9
13
Figure 22
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
Disassembly
1. Pump oil out of cylinder into a drain pan by slowly
moving piston back and forth.
2. Before disassembling cylinder, plug ports, wash exte-
rior with cleaning solvent and dry thoroughly
.
IMPORTANT: Use caution when using a vise to avoid
scratching or distorting any parts.
3. Put cylinder in a vise so shaft end is facing up.
4. Use a spanner wrench to rotate head (Item 1
1) and re-
move retaining ring (Item 7). Grasp end of shaft and use
a twisting and pulling motion to carefully extract the pis-
Figure 23
ton, shaft and head assembly from the barrel.
Removing retaining ring
Retaining ring
Spanner wrench
5. Remove cylinder from vise.
6. Remove nut (Item 12) from shaft, then remove piston
(Item 11), and head (Item 6). Remove and discard seals
and back–
up rings (Items 3 – 5 & 8 – 10).
Workman 3000/4000 Series Page 9
– 25 Hydraulic System
Hydraulic
System)