1. SHELL
2. ROD
3. GLAND
4. SPACER
5. CHECK VALVE
6. WASHER
7. SNAP RING
8. WIPER RING
9. SEAL
10. O-RING
11. BACKUP RING
12. WEAR RING
13. ROD SEAL
14. PISTON RING
Figure 10. Three-Stage FFL Main Lift Cylinder
Clean
WARNING
Cleaning solvents can be flammable and toxic and
can cause skin irritation. When using cleaning
solvents, always follow the solvent manufactur-
er's recommended safety procedures.
WARNING
Compressed air can move particles so they cause
injury to the user or to other personnel. Make sure
the path of the compressed air is away from all
personnel. Wear protective goggles or a face
shield to prevent injury to the eyes.
CAUTION
DO NOT allow cleaning solvent to come in contact
with rubber components. It will damage those
components.
1.
Clean all metal parts in solvent and dry with
compressed air.
Inspect
Inspect the gland for damage to the threads and
the seal surfaces. If damaged, replace gland.
Inspect the piston for any damage to the seal surfa-
ces. If damaged, replace piston.
Inspect the rod for damage to the rod surface and
ensure that the rod is not bent. If damaged, replace
rod.
Inspect the inner surface of the cylinder tube for
damage. If damaged, replace cylinder assembly.
Assemble
NOTE:
The procedures in this section cover all lift
cylinders except for the left main lift cylinder on
two-stage FFL masts. See the section Two-Stage
FFL Left Side Main Lift Cylinder for the proce-
dures.
NOTE:
To prevent damage to sealing surfaces, use
brass tools when installing seals and O-rings.
1.
Lubricate all internal parts of the lift cylinder
with clean hydraulic oil. Use new O-rings,
seals, and wear rings.
See Figure 9 for lift trucks equipped with a two-
stage LFL mast
See Figure 10 for lift trucks equipped with a
three-stage FFL mast
2100 SRM 1139
Lift Cylinder Repair
19
