HYDRAULIC SYSTEM RT880E SERVICE MANUAL
2-78 Published 11-10-2014, Control # 524-00
4. Inspect the barrel for scoring.
Assembly
1. If removed, install the holding valves. Refer to HOLDING
VALVES in this section.
NOTE: Lubricate new seals and rings with clean hydraulic
oil.
NOTE: Locate the gap of wear ring 180 degrees with
respect to each other.
2. Install the O-ring and backup rings on the outside of the
seal retainer and the rod seals and wear rings in the
inside of the seal retainer Figure 2-40.
3. Slide the seal retainer onto the inner rod.
4. Slide the inner rod and seal retainer into the outer rod.
5. Install the wiper ring, backup rings, deep Z rod seal, buf-
fer seal assembly and wear rings into the inside of the
cylinder head Figure 2-41.
6. Slide the spacer and head onto the outer rod.
7. Install the O-rings and backup rings into the inside of the
piston.
8. Screw the piston onto the outer rod and secure with a
new setscrew.
9. Install the guide lock rings, piston hydrolock seal assem-
blies and wear rings on the outside of the piston
Figure 2-42
10. Install the wear ring onto the outside of the spacer.
11. Install the O-ring and backup ring onto the outside of the
head.
12. Install the backup ring and O-ring onto the outside of the
inner rod end.
13. Clean all oil from the threads of the cylinder head and
apply Loctite #290 to the threads.
14. Slide the rod assembly into the cylinder barrel and screw
the cylinder head into the barrel.
CAUTION
When installing new seals and rings, clean all surfaces
and carefully remove burrs and nicks. Parts displaying
excessive wear or damage should be replaced.
Item Description
1 Backup Ring
2 Wear Ring
3 Deep Z Rod Seal
4O-ring
CAUTION
Improper seal installation can cause faulty cylinder
operation.
Wiper Ring
Rod Seal
Buffer Seal
Backup Ring
FIGURE 2-41
6488
Backup Ring
Wear Ring
Hydrolock Piston Seals
FIGURE 2-42
Wear Rings
Guidelock Ring
Guidelock Ring
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