Upright SB60 Service & Parts Manual page 37

3.16
3.16 Jib Cylinder
R E M O V A L
1. Using an overhead hoist or crane, support the cage
assembly at a convenient working height.
2. Mark and disconnect hoses and immediately cap
the openings to prevent contamination.
3. Remove hardware which secures jib cylinder pins.
NOTE: Jib cylinder is heavy. Take appropriate
measures to support cylinder.
4. Remove jib cylinder pins. Remove jib cylinder.
DISASSEMBLY
Note: Provide a clean work area for this operation,
and observe clean assembly practices. Seals and
hydraulic cylinder components are highly sensitive to
contamination that may not even be visible to the
naked eye.
1. Remove counterbalance valves from cylinder.
2. Unscrew head from cylinder.
3. Carefully pull shaft assembly from cylinder.
4. Secure rod end and locknut off of rod.
5. Slide the piston and head off of the rod.
6. Remove seal kit components (wipers, rod seals, o-
rings and backup rings) from head and piston.
7. Thoroughly clean all parts with solvent. Rinse the
inside of the tube and allow to drain. A high pres-
sure rinse and wipe with a lint free rag is preferable.
7. Inspect cylinder parts for scratches, pits, or polish-
ing. Check seal groves and sealing surfaces.
Scratches or pits deep enough to catch the fingernail
are unacceptable, replace the cylinder. Polishing is
a sign of uneven loading. When this occurs, the
surface should be checked for roundness. Cylinders
not round within .007" should be replaced.
ASSEMBLY
NOTE: Torque all hardware to torques listed on page
3-29 unless otherwise specified.
1. Lubricate all components and seals with clean
hydraulic oil prior to assembly.
SB60 Work Platform
Maintenance
Note: To avoid cutting the seals, do not use sharp
edged tools during seal replacement. After install-
ing seals allow at least one hour for the seals to
elastically restore to their original shape before
assembling cylinder.
2. Install new seal kit items to piston and head.
3. Lubricate rod wiper and seal with hydraulic oil and
4. Install piston and locknut (torque locknut to 375-450
5. Lubricate seals on piston and head with hydraulic
6. Carefully slide rod assembly into cylinder.
7. Thread head into cylinder.
I N S T A L L A T I O N
1. Follow steps from "REMOVAL" section in reverse
2. Slowly cycle jib cylinder several times. Check
A. Rod
B. Head
C. Piston
D. Locknut
E . Cylinder
slide head onto rod.
ft/lbs) onto rod.
oil.
order to install cylinder.
hydraulic connections for leaks. Check for proper
cylinder operation.
Seal kit (100551-010) includes:
1. Wiper
2. Seal
3. Wear Ring
4. O-Ring
5. O-Ring
Figure 3-22: Jib Cylinder
Section
3.16
6. Back Up
7. O-Ring
8. Seal
9. Wear Ring
3-23