HYDRAULIC SYSTEM RT880E SERVICE MANUAL
2-90 Published 11-10-2014, Control # 524-00
Assembly
NOTE: Lubricate head and all seals and rings with clean
hydraulic oil.
1. Install wiper ring and rod seal in the inside of head and
the O-ring and backup ring on the outside of the head.
2. Install the O-ring on inside of piston and the seal and
wear ring on the outside of the piston.
3. Place the rod on a clean table
4. Install the head using a rubber mallet to ensure the seals
are engaged. Push the head about half way down the
length of the rod assembly.
5. With a hoist, raise the rod assembly back into a vertical
position taking care not to damage seals.
6. Brush piston seals and head seals with hydraulic oil.
7. Lower the rod into barrel. Stop just before the head
enters the barrel.
8. Place a spanner wrench on the head and turn counter-
clockwise until the threads click, then reverse direction
to clockwise and thread on until there is no gap between
the head shoulder and top of barrel.
9. Install piston onto rod.
10. Install the locknut onto rod.
11. Install the port plugs.
12. Pressurize and cycle the cylinder with hydraulic oil pres-
sure. Static pressure test the cylinder at 4000 psi
(27,579 kPa) in both directions. Check for proper opera-
tion and any leakage. Make repairs as needed.
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.
CAUTION
Ensure there are no rags or other contaminants left in the
cylinder barrel before installing rod assembly. Lubricate
the barrel ID with hydraulic oil to ease the rod assembly
installation.
WARNING
Before testing, ensure all fittings, hoses, ball valves, and
pump components are rated higher than test pressures.
Do not use air pressure to cycle or pressurize the cylinder.
Failure to do so could result in personal injury or death.
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