Manitowoc Grove RT880E Service And Maintenance Manual page 114

HYDRAULIC SYSTEM
Item
23 Tube Assembly
24 Adapter
25 Plug
26 Elbow
27 Cap Assembly
28 Adapter
1. Install head retainer ring on rod.
2. Install two new threaded inserts into head.
3. Install the replacement wear ring, buffer seal, deep Z rod
seal, backup ring, and wiper ring in the inside of the
head. Make sure the buffer seal's step is closer to the
deep Z rod seal. Make sure the deep Z rod seal's rim
groove is closer to the buffer seal.
4. Install the replacement O-ring and the backup ring on
the outside of the head.
5. Install the replacement T-Seal in the inside of the piston.
6. Lubricate the rod with clean hydraulic oil.
7. Slide the head, wiper ring end first, onto the rod.
8. Screw the piston onto the rod tightly. Secure the piston
with the setscrew.
Hydrolock Piston Seals
9. Install the replacement hydrolock seals on the outside of
the piston. Make sure the "vees" on the two hydrolock
seals point at each other Figure 2-39.
10. Lubricate all parts freely with clean hydraulic oil.
2-76
Description
FIGURE 2-39
Published 11-10-2014, Control # 524-00
RT880E SERVICE MANUAL
CAUTION
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.
11. Remove the cover from the barrel. Insert the rod and
attached parts into the barrel with a slight twisting
motion.
12. 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.
13. Screw the head retainer ring into the barrel and align
holes in retainer ring with holes in head. Install two
socket head capscrews. Torque the capscrews 44 to 48
lb-ft (59.6 to 65.0 Nm).
14. Using a spanner wrench or chain wrench, continue to
screw the retainer ring/head into place in the barrel.
CAUTION
Do not use air pressure to cycle or pressurize the cylinder.
15. Position the holding valve on the cylinder barrel and
secure with four capscrews and washers. Connect
tubing to holding valve.
16. Pressurize and cycle the cylinder with hydraulic oil
pressure. Test the cylinder at 41,368.5 kPa/413.6 bar
(6000 psi). Check for proper operation and any leakage.
Make repairs as needed.