8006-27
TM 5-2420-230-24-1
7. Fasten the piston rod eye (5) in the vise.
20. Fasten the tube (1) in a vise or other holding
equipment. Be careful to prevent damage to the
8. Remove any marks and sharp edges on the
tube (1).
chamfer at the end of the piston rod (6).
21. Install a new backup ring (19) and O-ring (20) in
9. Lubricate the bore of the gland (3) with clean oil.
the groove on the outside of the end cap (21).
10. Push the gland (3) onto the piston rod (6). If
22. Lubricate the O-ring (20) on the end cap (21)
necessary, use a soft hammer to drive the gland
with clean oil.
(3) onto the piston rod (6).
23. Install the end cap (21) in the tube (1).
11. Put a support below and near the end of the
24. Lubricate the inside of the tube (1) and the piston
piston rod (6). Use a shop cloth between the
(4) with clean oil.
support and the piston rod (6) to prevent damage
to the piston (4).
25. Use a piston ring compression tool to hold the
new wear ring (9) in place.
12. Put the piston (4) on the end of the piston rod (6).
13. Put the hardened washer (8) on the bolt (7).
26. Push the tube (1) straight onto the piston (4).
14. Clean the threads on the end of the piston rod
27. Start the tube (1) onto the piston rod assembly.
and the threads of the bolt using Loctite cleaning
Push the tube onto the piston rod assembly until
solvent. Allow to dry. Apply Loctite 243 to the
the compression tool is pushed off the piston rod
piston rod threads 6.35 mm (1/4 inch) from the
assembly. Be careful not to damage the wear
open end of the piston rod so that there is 3.7
ring (9) and seal (10).
mm (1/2 inch) of Loctite 243 on the piston rod
28. Lubricate the O-ring (13) on the gland (3) with
threads. DO NOT apply Loctite to the first 6.35
clean oil.
mm (1/4 inch) of the piston rod threads.
29. Tighten the gland (3) to 135 to 542 Nm (100 to
15. Install the bolt (7). Tighten the bolt (7) to the
400 pound-feet). If the lock screw (2) holes
torque value on page 3 for the cylinder that is
become aligned in this torque range, install the
being repaired. A torque multiplier can be used
lock screw (2). Tighten the lock screw (2) to 2.3
to help tighten the bolt.
Nm (20 pound-inches). If the lock screw (2) holes
16. Install a new piston ring (12) in the groove at the
are not aligned, do steps 30 through 32.
bolt end of the piston (4).
30. Tighten the gland (3) to 135 to 542 Nm (100 to
17. Install a new wear ring (9) in the center grove on
400 pound-feet).
the outside of the piston (4).
31. Use a No. 26 drill and drill a hole half in the gland
18. Install a new backup ring (11) in the groove on
(3) and half in the tube (1). Drill to a depth of 11
the outside of the piston (4).
mm (7/16 inch). Do not drill in line with a hole in
the gland (3) for the gland wrench.
19. Install a new seal (10) on top of the backup ring
(11) on the outside of the piston (4).
32. Install the lock screw (2). Tighten the lock screw
(2) to 2.3 Nm (20 poundinches).
33. If the hoses were removed with the cylinder,
install new O-rings, if equipped, on the hose
fittings. Lubricate the O-rings with clean oil.
Install the hoses.
H-35
Bur 6-41750
Issued 2-01
Printed in U.S.A.
