8006-07
TM 5-2420-230-24-1
Assembly
15. Install the bolt (7). Tighten the bolt (7) to the
torque value on page 3 for the cylinder that is
NOTE: Refer to illustration on page 6 and 8.
being repaired. A torque multiplier can be used
NOTE: If a new gland (3) is being installed, put the
to help tighten the bolt.
part number of the cylinder on the new gland (3).
16. Install a new wear ring (11) in the end groove on
1. Install the bushing (17) in the gland (3).
the outside of the piston (4).
2. Install the buffer seal (16) in the gland (3). The
17. Install a new backup ring (10) in the center
side of the buffer seal (16) with the lip must be
groove on the outside of the piston (4).
toward the small end of the gland (3).
18. Install a new seal (9) on top of the backup ring
3. Install the rod seal (15) in the gland. The rod seal
(10) on the outside of the piston (4).
(15) is to be installed so that the lips of the rod
19. Lubricate the inside of the tube (1) and the piston
seal (15) are toward the small end of the gland
(4) with clean oil. Use a piston ring compression
(3). The wide seal (15) can be difficult to install.
tool to hold the new wear ring (11) in place.
Use the tool shown on page 4.
20. Push the tube (1) straight onto the piston (4).
4. Install a new wiper (14) in the gland (3). The lips
21. Start the tube (1) onto the piston rod assembly.
of the wiper (14) must be toward the large end of
Push the tube onto the piston rod assembly until
the gland (3).
the compression tool is pushed off the piston rod
5. Install a new backup ring (13) in the groove on
assembly. Be careful not to damage the wear
the outside of the gland (3). If both sides of the
ring and seal.
backup ring (13) are not flat, the side that is not
22. When the piston (4) is in the smooth part of the
flat must be toward the small end of the gland
tube (1), start the gland (3) into the tube (1).
(3).
23. Lubricate the O-ring (12) on the gland (3) with
6. Install the O-ring (12) next to the backup ring (13)
clean oil.
in the groove on the outside of the gland (3). The
O-ring (12) must be toward the small end of the
24. Tighten the gland (3) to 135 to 542 Nm (100 to
gland (3).
400 pound-feet). If the lock screw (2) holes
7. Fasten the piston rod eye (5) in the vise.
become aligned in this torque range, install the
lock screw (2). Tighten the lock screw (2) to 2.3
8. Remove any marks and sharp edges on the
Nm (20 pound-inches). If the lock screw (2) holes
chamfer at the end of the piston rod (6).
are not aligned, do steps 25 through 27.
9. Lubricate the bore of the gland (3) with clean oil.
25. Tighten the gland (3) to 135 to 542 Nm (100 to
10. Push the gland (3) onto the piston rod (6). If
400 pound-feet).
necessary, use a soft hammer to drive the gland
26. Use a No. 26 drill and drill a hole half in the gland
(3) onto the piston rod (6).
(3) and half in the tube (1). Drill to a depth of 11
11. Put a support below and near the end of the
mm (7/16 inch). Do not drill in line with a hole in
piston rod (6). Use a shop cloth between the
the gland (3) for the gland wrench.
support and the piston rod (6) to prevent damage
27. Install the lock screw (2). Tighten the lock screw
to the piston (4).
(2) to 2.3 Nm (20 pound inches).
12. Put the piston (4) on the end of the piston rod (6).
28. If the hoses were removed with the cylinder,
13. Put the washer (8) on the bolt (7).
install new O-rings, if equipped, on the hose
fittings. Lubricate the O-rings with clean oil.
14. Clean the threads on the end of the piston rod
Install the hoses.
and the threads of the bolt using Loctite cleaning
solvent. Allow to dry. Apply Loctite 243 to the
piston rod threads, 6.4 mm (1/4 inch) from the
open end of the piston rod so that there is 12.7
mm (1/2 inch) of Loctite 242 on the piston rod
threads. DO NOT apply Loctite to the first 6.4
mm (1/4 inch) of the piston rod threads.
Bur 6-41750
Issued 2-01
Printed in U.S.A.
