Manitowoc Grove RT530E-2 Service And Maintenance Manual page 93

RT530E-2 SERVICE MANUAL
Item
19 Plug
20 Holding Valve
21 Tube Assembly
22 Nut
23 Capscrew
24 Pipe Clamp
1. Install the replacement wear rings, buffer seal, rod seal
and wiper ring in the inside of the head. Make sure the
buffer seal's step is closer to the rod seal. Make sure the
rod seal's rim groove is closer to the buffer seal
(Figure 2-29).
Wear Ring
Buffer Seal
2. Install the replacement O-ring and the backup ring on
the outside of the head.
3. Install the replacement O-ring and backup rings in the
inside of the piston.
4. Lubricate the rod with clean hydraulic oil.
5. Slide the head, wiper ring end first, onto the rod.
6. Screw the piston onto the rod until tight. Secure the
piston with the set screw.
GROVE
Description
Rod Seal
Wiper Ring
6865-2
FIGURE 2-29
Published 4-22-15, Control # 556-00
Hydrolock Piston Seals
7. 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 2-30).
8. Lubricate all parts freely with clean hydraulic oil.
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.
9. Remove the cover from the barrel. Insert the rod and
attached parts into the barrel with a slight twisting
motion.
10. Using a spanner wrench or chain wrench, screw the
head into place in the barrel.
CAUTION
Do not use air pressure to cycle or pressurize the cylinder.
11. Position the holding valve on the cylinder barrel and
secure with four capscrews and washers. Torque
capscrews 97.6 to 105.7 Nm (72 to 78 pounds-foot).
Connect tubing to holding valve.
12. Pressurize and cycle the cylinder with hydraulic oil
pressure. Test the cylinder at 41,368 kPa/413.6 bar
(6000 psi). Check for proper operation and any leakage.
Make repairs as needed.
HYDRAULIC SYSTEM
FIGURE 2-30
2-59
2