Upright SB60 Service & Parts Manual page 34

Section
3.13
3.13 Slave Cylinder
R E M O V A L
1. Extend boom until slave cylinder base end pin is
accessible. Support the cage assembly.
2. Remove rod end pin retaining bolt.
3. Mark and disconnect hoses and immediately cap
the openings to prevent contamination.
4. Using a metal drift, remove rod end pin.
5. Remove base end pin retaining bolt and remove pin.
6. Carefully remove slave 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 be visible to the naked
eye.
1. Unscrew head from cylinder.
2. Carefully pull rod assembly from cylinder.
3. Clamp rod end in vise and turn off locknut.
4. Slide the head off of the rod.
5. Remove seal kit components (wipers, rod seals, o-
rings and backup rings) from head, piston and seal
block.
6. 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 parts for scratches, pits, or polishing. Check
seal groves and sealing surfaces. Scratches or pits
deep enough to catch the fingernail are unaccept-
able; 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.
3-20
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
slide head onto rod.
4. Install piston and locknut onto rod.
5. Lubricate seals on piston and head with hydraulic oil.
6. Carefully slide rod assembly into cylinder.
7. Thread head into cylinder.
8. Clean set screw in loctite primer. Install set screw
using loctite #242.
INSTALLATION
1. Follow steps from "REMOVAL" section in reverse
order to install cylinder.
2. Remove boom support.
3. Slowly raise and lower boom several times. Check
hydraulic connections for leaks. Check for proper
slave cylinder operation.
A. Rod
B. Head
C. Piston
D. Locknut
E . Cylinder
Seal kit (100552-010) includes:
1. O-Ring
2. Wiper
3. Seal
4. Wear Ring
Figure 3-19: Slave Cylinder
SB60 Work Platform
3.13
5. O-Ring
6. Back-Up
7. O-Ring
8. Seal
9. Wear Ring