8006-15
TM 5-2420-230-24-1
6. Install the O-ring (14) next to the backup ring (15)
18. Install a new wear ring (9) in the groove in the
in the groove on the outside of the gland (3). The
center of the piston (4).
O-ring (14) must be toward the small end of the
19. Install a new backup ring (11) in each groove on
gland (3)
the outside ends of the piston (4).
7. Fasten the piston rod eye (5) in the vise.
20. Install a new seal (10) over each backup ring (11)
8. Remove any marks and sharp edges on the
on the outside ends of the piston (4).
chamfer at the end of the piston rod (6)
21. Lubricate the inside of the tube (1) and the piston
(4) with clean oil.
9. Lubricate the bore of the gland (3) and the piston
rod (6) with clean oil.
22. Push the tube (1) straight onto the piston (4).
10. Push the gland (3) onto the piston rod (6). If
23. Start the tube (1) onto the piston rod assembly.
necessary, use a soft hammer to drive the gland
Be careful not to damage the wear ring and seal.
(3) onto the piston rod (6).
24. 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
25. Lubricate the O-ring (12) on the gland (3) with
support and the piston rod (6) to prevent damage
clean oil.
to the piston (4).
26. Tighten the gland (3) to 135 to 542 Nm (100 to
12. Install a new O-ring (13) on the check valve (12).
400 poundfeet). If the lock screw (2) holes
Apply a thin strip of Loctite 243 to the threads of
become aligned in this torque range, install the
the check valve (12). Lubricate the O-ring (13)
lock screw (2). Tighten the lock screw (2) to 2.3
with clean oil.
Nm (20 poundinches). If the lock screw (2) holes
13. Install the check valve (12) in the piston (4).
are not aligned, do steps 28 through 30.
Tighten the check valve (12) to 27 to 34 Nm (239
27. Tighten the gland (3) to 135 to 542 Nm (100 to
to 301 pound-inches).
400 poundfeet).
14. Put the piston (4) on the end of the piston rod (6).
28. Use a No. 26 drill and drill a hole half in the gland
15. Put the hardened washer (8) on the bolt (7).
(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
16. Clean the threads on the end of the piston rod (6)
the gland (3) for the gland wrench.
and the threads of the bolt using Loctite cleaning
solvent. Allow to dry. Apply Loctite 243 to the
29. Install the lock screw (2). Tighten the lock screw
piston rod threads 6.35 mm (1/4 inch) from the
(2) to 2.3 Nm (20 pound-inches).
open end of the piston rod so that there is 12.7
30. If the hoses were removed with the cylinder,
mm (1/2 inch) of Loctite 242 on the piston rod
install new O-rings, if equipped, on the hose
threads. DO NOT apply Loctite to the first 6.35
fittings. Lubricate the O-rings with clean oil.
mm (1/4 inch) of the piston rod threads.
Install the hoses.
17. Install the bolt (7). Tighten the bolt (7) to the
torque value on page 3 for the cylinder that is
being repaired. A torque multiplier can be used
to help tighten the bolt (7).
H-23
Bur 6-41750
Issued 2-01
Printed in U.S.A.
