DRESSTA TD-25M EXTRA, Service Manual

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SECTION 10C
CYLINDERS
Page 14
TD-25M EXTRA DRESSTA
BLADE TILT AND PITCH CYLINDER
Legend for Fig.‘s 10C.20 and 10C.21
1. Cylinder Housing
2. Cylinder Bushing
3. Nut
4. Washer
5. Wear Ring 6. O-Ring
7. Piston
8. Piston Seal
9. O-Ring
Backup Ring 10. Cylinder Gland
11. Wear Ring
12. Buffer Ring
13. Seal Ring
14. Wiper Ring 15. Lock Ring
16. Cover
17. Socket Cap
18. Cylinder Rod
19. O-Ring
1. Steam clean or wash the cylinder with solvent before disassembly.
2. Attach a hoist sling to the socket cap as shown in Fig.10C.22. Raise the cylinder up and
secure it to the hoist frame.
Fig. 10C.22. Securing Cylinder to Hoist Fig. 10C.23. Relieving Tension on Lock Ring
3. Using the hoist, pull the cylinder rod out to approximately 1/2 stroke.
4. Remove the bolts and washer securing cylinder cover (16) to gland (10) and tie the cover up to
the socket cap as shown in Fig. 10C.23, to provide working clearance.
5. Using a brass drift as shown in Fig. 10C.23, drive gland into cylinder housing (1) until the
tension of the lock ring (15) is off.
6. Remove three piece lock ring (15) from cylinder housing and pull rod assembly out of cylinder
housing (1).
7. Remove piston rod nut (3).
NOTE: It will be necessary to hold the ball end of the rod stationary when removing the nut.
A suggested method is to clamp the ball end of the piston rod in a hydraulic press and use
a torque multiplier as shown in Fig. 10C.24, or an impact tool.
8. Remove washer (4) and piston (7) from cylinder rod (18). Remove wear rings (5), O-rings (6)
and piston seal (8) from the piston (7).
9. Slide gland (10) from cylinder rod (18). Remove wear ring (11), O-ring with backup ring (9),
wiper ring (14), seal ring (13) and buffer ring (12) with O-ring (19) from gland (10).
10. Slide cover (16) and socket cap (17) off of cylinder rod (18).
11. If necessary, remove the cylinder bushing (2) from cylinder housing (1).