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