Manitowoc Grove RT770E Service Maintenance Manual

2-67
GROVE
RT770E HYDRAULIC SYSTEM
2
Published 11/26/2014, Control # 447-05
13. Remove the cover from the barrel. Insert the rod and
attached parts into the barrel with a slight twisting
motion.
14. Install new gasket material to the cylinder head retainer
ring flange as follows:
a. Clean the barrel and retainer ring with Loctite
cleaning solvent 7070 or similar non- chlorinated
solvent.
b. Apply a light coating of Loctite primer N7649 to both
surfaces. Allow primer to dry for one to two minutes.
Primer must be dry. Mating of parts should occur
within five minutes.
c. Apply gasket material Loctite Master Gasket 518 to
one surface. Partial cure is obtained in four hours,
with full cure in 48 hours.
15. Screw the head retainer ring into the barrel and align
holes in retainer ring with holes in head. Secure the
head retainer ring to the head with two socket head
capscrews. Torque screws to 60 to 65 Nm (44 to 48 lb-
ft).
16. Using a spanner wrench or chain wrench, continue to
screw the retainer ring/head into place in the barrel.
17. Position the holding valve on the cylinder barrel and
secure with screws and washers.
18. Connect the tubing to the holding valve.
19. Pressurize and cycle the cylinder with hydraulic oil
pressure. Test the cylinder rod side at 241 bar
(3500 psi). Test the cylinder piston side at 413 bar
(6000 psi). Check for proper operation and any leakage.
Make repairs as needed.
20. After successful pressure testing, retorque screws
holding retainer ring to head to 60 to 65 Nm (44 to 48 lb-
ft).
CAUTION
Exercise extreme care when handling the rods. Damage
to the rod surface may cause unnecessary maintenance
and expense. Also, take care to avoid damaging grooved
or gland surfaces, rings or seals during rod insertion.
CAUTION
Do not use air pressure to cycle or pressurize the cylinder.
Damage to the seals may result.

Manitowoc Grove RT770E Specifications

General

Brand	Manitowoc
Model	Grove RT770E
Category	Construction Equipment
Language	English