Grove Published 11-22-2016, Control # 345-12 2-97
RT9130E-2 SERVICE MANUAL HYDRAULIC SYSTEM
1. Install the replacement wiper ring and rod seal into the
inside of the head.
2. Install the O-ring, backup ring and wire wrap on the
outside of the head.
3. Install the O-ring in the inside of the piston.
4. Lubricate the rod with clean hydraulic oil.
5. Install the head onto the rod. Torque to 200 ± 20 lb-ft
(271.1 ± 27.1 Nm).
6. Install the piston onto the rod. Secure the piston with the
nut. Lubricate the threads and torque the nut to 245 ± 15
lb-ft (332.1 ± 20.3 Nm).
7. Install the seal and wear rings on the outside of the
piston.
8. Lubricate all parts freely with clean hydraulic oil.
9. Apply 1/8 bead of Loctite thread adhesive #277 or
equivalent across the length of the threads on the rod
end side of the rod. Install the rod end on the rod and
torque 375 to 450 lb-ft (508.4 to 610.1 Nm).
10. Remove the cover from the barrel. Insert the rod and
attached parts into the barrel with a slight twisting
motion.
11. Pressurize and cycle the cylinder with hydraulic oil
pressure. Static pressure test the cylinder at 2250 psi
(15,513 kPa/15.5 bar). Check for proper operation and
any leakage. Make repairs as needed.
PARK BRAKE CYLINDER
Description
The park brake cylinder, mounted on the front axle, releases
and applies the park brake. The park brake cylinder consists
of a hydraulic cylinder and a lever. When the operator
positions the Park Brake switch to ON, the park brake
solenoid valve de-energizes and closes the valve, removing
hydraulic force from the cylinder’s piston. This allows the
cylinder’s spring to extend, retracting the cylinder lever, and
applying the park brake to hold the crane in place. When the
operator positions the Park Brake switch to OFF, the park
brake solenoid valve energizes and opens the valve to apply
hydraulic force to the cylinder’s piston. This allows the piston
to compress the spring, extend the cylinder lever, and
release the park brake.
CAUTION
Possible Equipment Damage!
Exercise extreme care when handling the rod. Damage to
the rod surface may cause unnecessary maintenance
and expense. Also, take care to avoid damaging grooved
or gland surfaces or rings or seals during rod insertion.
CAUTION
Flying Parts Hazard!
Use only a source of controlled hydraulic oil pressure to
cycle or pressurize the cylinder.
Parts can fly from the cylinder at dangerous speeds when
using air pressure.
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