Manitowoc Grove RT770E Service Maintenance Manual page 106

HYDRAULIC SYSTEM
Item
9 T-Seal
10 O-ring, Low Temperature
11 Back-up Ring
12 Wear Ring
13 Seal
14 Rod Seal
15 Back-up Ring
16 Wiper Ring
17 Capscrew
18 Insert
19 Capscrew
20 Flatwasher
21 O-ring Plug
22 Plug
23 Set Screw
24 Tube
25 Straight Adapter
26 Pipe Plug
27 Grease Fitting
28 Grease Fitting
29 Capscrew
Assembly
CAUTION
When installing new seals and rings, avoid stretching
seals or scratching the grooved or gland surfaces. Make
sure parts are clean before and during assembly. Make
sure seals and rings are installed in the proper order.
Damage to the cylinder or unexpected operation may
result.
NOTE: Lubricate seals and rings with clean hydraulic oil.
1. Install head retainer ring on rod.
2. Install two new threaded inserts into head.
3. Install the wiper ring and backup ring in the inside of the
retaining ring.
2-66
Description
Published 11/26/2014, Control # 447-05
1
2
Item
1 Buffer Seal
2 Deep Z Rod Seal
3 Backup RIng
4 Wiper Ring
4. Install the replacement wear rings, buffer seal and deep
Z rod seal in the inside of the head. Make sure the buffer
seal's step is closer to the deep Z rod seal Figure 2-35.
Make sure the deep Z rod seal's rim groove is closer to
the buffer seal.
5. Install the replacement O-ring and backup ring on the
outside of the head.
6. Install the replacement piston seal in the inside of the
piston.
7. Lubricate the rod with clean hydraulic oil.
8. Install the retaining ring onto the rod.
9. Slide the head onto the rod.
10. Screw the piston onto the rod tightly. Secure the piston
with the setscrew.
11. Install the replacement hydrolock seals on the outside of
the piston, Figure 2-36. Make sure the "vees" on the two
hydrolock seals point at each other.
Hydrolock Piston Seals
12. Lubricate all parts freely with clean hydraulic oil.
RT770E
3
4
FIGURE 2-35
Description
FIGURE 2-36