Manitowoc Grove RT765E-2 Service And Maintenance Manual page 112

HYDRAULIC SYSTEM
3. Install the buffer seal assembly and backup ring in the
inside of the head Figure 2-44.
1
2
Item
1 Buffer Seal
2 Rod Seal
3 Backup Ring
4 Wiper Ring
4. Install the deep Z rod seal inside the head. Make sure
the seals are properly assembled and installed in the
correct direction.
5. Install the O-ring and backup ring onto the outside of the
head.
6. Install the head on the rod.
7. Install the spacer on the cylinder rod.
CAUTION
Improper seal installation can cause faulty cylinder
operation.
8. Install the o-ring and backup rings into the inside of the
piston.
NOTE: Use a new self-locking soft-tip setscrew.
9. Screw the piston onto rod and secure with a new
setscrew.
10. Install the guide lock rings, hydrolock seals and wear
rings onto the outside of the piston Figure 2-45. Refer to
the figure titled.
2-74
4
3
FIGURE 2-44
Description
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
4
2
1
Item
1 Setscrew
2 Hydro-lock Seals
3 Backup Ring
4 Guidelock Ring
5 Wear Ring
11. Install the wear ring on the outside of the spacer.
CAUTION
Avoid scratching or damaging the grooved and gland
surfaces or the seals and rings.
12. Clean all oil from the threads of the cylinder head and
apply Loctite #290 to the threads.
13. Lubricate the piston seals and cylinder head o-ring with
clean hydraulic oil and install the rod assembly into the
cylinder barrel with a slight twisting motion.
14. Using a chain wrench, secure the cylinder head to the
cylinder barrel.
CAUTION
Do not use air pressure to cycle or pressurize the cylinder.
Damage to the seals may result.
15. Pressurize and cycle the cylinder with hydraulic oil
pressure. Test the cylinder at 5250 psi (36,170 kPa).
Check for proper operation and any leakage. Make
repairs as needed.
5
3
FIGURE 2-45
Description