Grove Published 11-22-2016, Control # 345-12 2-95
RT9130E-2 SERVICE MANUAL HYDRAULIC SYSTEM
POWER PIN CYLINDER
Description
The power pin cylinders Figure 2-56 are installed in the
outrigger box assemblies have a 4.0 in (10.1 cm) diameter
bores.
The cylinder has a retracted length of 20.31 in (51.5 cm) and
an extended length of 26.43 in (67.1cm). Each cylinder has a
stroke of 6.12 in (15.5 cm).
A wiper ring prevents foreign material from entering each
cylinder. O-rings and other seals prevent internal and
external leakage.
The cylinder weighs approximately 60.1 lb (27.3 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. Secure the cylinder in a clean work area by use of
clamps or a chain vise to prevent rolling.
2. Retract the cylinder fully to avoid damaging the rod
during removal.
NOTE: Mark or note the piston and head relationship to the
rod and barrel.
3. Clean away all dirt from the head. Place protective
padding around the rod near the head to prevent
damaging the chrome during head removal.
4. Position the rod mount with the ports facing down.
5. Using a means of collecting the oil, remove the port
plugs and allow cylinder to drain.
6. Remove the setscrew from the flange.
7. Remove rod assembly and attached parts from the
barrel. Place the rod on a surface that will not damage
the chrome or allow the rod assembly to drop.
NOTE: Cover the barrel opening to avoid contamination.
8. Unscrew the rod end from the rod.
9. Remove the seal and wear rings 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.
10. Loosen and remove the nut securing the piston.
Remove the piston from the rod.
11. Remove the O-ring from the inside of the piston.
12. Remove the head from the rod.
13. Remove the O-ring, backup ring and wire wrap from the
outside of the head.
14. Remove the wiper ring and rod seal from the inside of
the head.
Inspection
1. Clean all parts with solvent and dry with compressed air.
Inspect for damaged or worn parts and replace as
required.
2. Stone out minor blemishes and polish with fine crocus
cloth.
3. Clean with solvent and dry with compressed air, any
parts that have been stoned and polished.
4. Inspect the barrel for scoring.
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
Possible Equipment Damage!
Clean all surfaces and remove all burrs and nicks before
installing new seals and rings. Replace all damaged or
worn parts.
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