99903514:TELESCOPIC CRANE: 3A-6
SECTION 3A: CYLINDER REPAIR
20030315
3A-2. CYLINDER ASSEMBLY
NOTE
BEFORE ASSEMBLY OF CYLINDER, FAMILIARIZE
YOURSELF WITH FIGURE C1-2, SEAL
INSTALLATION GUIDELINES.
1. Install the piston seal. Make certain it is free of
twists.
CAUTION
WORK THE PISTON SEAL CAREFULLY INTO
POSITION FROM THE TOP OF THE PISTON USING
THE ASSEMBLY GROOVE. DO NOT ATTEMPT
DOING SO FROM THE BOTTOM OF THE PISTON.
YOU MAY SCRATCH IT AND RENDER IT USELESS.
2. Slide the piston wear rings over the lands and
allow them to snap into position in the grooves.
3. Carefully press the lock-ring seal into position.
CAUTION
ALWAYS USE A NEW LOCK RING SEAL. A USED
OR DAMAGED LOCK RING SEAL MAY PERMIT THE
PISTON TO BACK OFF.
4. Install the static back-up and o-ring on the head.
Make certain the o-ring is not twisted.
5. Position the head with
the rod wiper pocket “down”
and insert the rod wear ring
into its groove.
6. Position the head with the rod wiper pocket “up”.
7. Using the Rod Seal Installation Tool, install Rod
seal as follows:
A. Place rod seal on flat surface with seal lip
down.
B. Open tool so that center pin is outside the
seal O.D. and the handle pins are inside the I.D.
C. Rotate handles to deform seal.
D. Install seal in groove from external end of
bore.
E. Release pressure and remove tool.
F. With finger pressure, snap remaining part of
seal into groove.
8. Install the rod wiper in the same manner as the
rod seal.
9. Install the wear rings by overlapping the ends to
reduce the diameter so they will slide into position.
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