2-86 Published 11-22-2016, Control # 345-12
HYDRAULIC SYSTEM RT9130E-2 SERVICE MANUAL
OUTRIGGER EXTENSION CYLINDER
Description
The four extension cylinders have 2.5 in (63.5 mm) diameter
bores.
Each cylinder Figure 2-52 has a retracted length of 9 ft
0.88 in (2.7655 mm) from the center of the rod bushing to the
center of the barrel bushing. Each cylinder’s extended length
is 17 ft 1.9 in (5229.3 mm). The stroke of each cylinder is 8 ft
1 in (177.8 mm).
A wiper ring prevents foreign material from entering each
cylinder. O-rings and other seals prevent internal and
external leakage.
The cylinder weighs approximately 104.9 lb (47.6 kg).
Maintenance
Disassembly
NOTE: Any maintenance requiring disassembly of the
cylinders should include replacement of all seals
and rings. A seal kit will supply the required items.
1. Loosen the head’s setscrew. Using a chain wrench,
unscrew the head from the barrel.
2. Rapidly pull the rod against the head to free it. Remove
rod and attached parts from the barrel.
NOTE: Cover the barrel opening to avoid contamination.
3. Remove the wear rings and piston seal from the outside
of the piston.
NOTE: Arranging discarded seals and rings in the order of
disassembly will aid in installation of new seals and
rings. Pay attention to how each seal and ring is
installed to avoid installing replacement seals and
rings improperly.
4. Remove the head from the rod.
5. Remove the O-ring and backup ring from the outside of
the head and the wear ring, rod seal and wiper ring from
the inside of the head.
Inspection
1. Clean all parts with solvent and dry with compressed air.
Inspect all parts for serviceability.
2. Inspect the barrel carefully for scoring. If barrel is
scored, it must be repaired or replaced.
3. Check rod’s piston area for damage. If it is damaged,
determine if it can be repaired or must be replaced.
4. Inspect rod for straightness. Determine if it can be
straightened or must be replaced.
5. Stone out minor blemishes and polish with a fine crocus
cloth.
6. Clean with solvent and dry with compressed air any
parts that have been stoned and polished.
Assembly
NOTE: Lubricate seals and rings with clean hydraulic oil.
1. Install the replacement wear ring, rod seal and wiper ring
in the inside of the head. Make sure the rod seal’s rim
groove is closer to the wear ring.
2. Install the replacement O-ring and the backup ring on
the outside of the head.
3. Lubricate the rod with clean hydraulic oil.
4. Slide the head, wear ring end first, onto the rod.
CAUTION
Flying Parts Hazard!
Do not use air pressure to remove the rod. Use only a
source of controlled hydraulic oil pressure if the rod is
hard to move.
Parts can fly from the cylinder at dangerous speeds when
using air pressure.
CAUTION
Possible Equipment Damage!
Exercise extreme care when handling or setting down the
rod. Damage to the rod surface may cause unnecessary
maintenance and expense.
CAUTION
Possible Equipment Damage!
When removing seals and rings, avoid scratching the
grooved and gland surfaces.
CAUTION
Before installing new seals and rings, clean all surfaces
and carefully remove burrs and nicks. Parts displaying
excessive wear or damage should be replaced.
CAUTION
When installing new seals and rings, avoid stretching
seals or scratching the grooved or gland surfaces. Make
sure parts are clean before and during assembly. Make
sure seals and rings are installed in the proper order.
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