Service Manual User Manual

Section 9
9-102
4. Remove the locking insert (13) from its hole in the
head gland threads. Pry or drill out the insert as
required. DO NOT damage the head gland threads. A
new locking insert will be required for reassembly.
5. Use a pin spanner wrench to unthread the head
gland (14) from the tube (2).
Note: The head gland is installed at a torque of 300-400
lb/ft (407-542 Nm). Use suitable tools to remove the head
gland.
IMPORTANT: Protect the finish on the rod at all times.
Damage to the rod can cause premature seal failure.
6. Carefully withdraw the rod weldment (16) straight out
of the tube (2). Keep the rod straight during
withdrawal to help avoid scratching, nicking or
damaging the tube.
IMPORTANT: When sliding the rod and piston assembly
in the tube, DO NOT damage the piston by scraping it
against the threads in the tube. Keep the rod in line with
the tube to prevent binding.
7. Secure the rod eyelet and remove the 1.50-12 NF nut
(3) from the threaded end of the rod. Discard the nut;
a new nut will be required for reassembly.
Note: Heating the nut to approximately 300° F (150° C)
may also be required to break the seal formed by the
Loctite Threadlocker #271 (red) applied to the nut when
installed. The application of significant force is required to
overcome the 1100-1250 lb/ft (1492-1695 Nm) of torque
the nut was tightened to when originally installed.
8. Remove the piston (5) from the rod (2).
9. Remove the small O-ring (7).
10. Remove the head gland (14) from the rod (2).
11. Remove both precision wearbands (4) from the
piston (5).
12. Remove the Type 730 capped T-seal (6) from the
piston (5).
Note: The T-seal actually consists of four components; a
wide, flexible inner band, the flexible T-seal band itself,
and two supportive split caps that mount on either side of
the “T” seal band.
13. Remove the O-ring (8) from the head gland (14).
14. Remove the backup ring (9) from the head gland
(14).
15. Remove the O-ring (10) from the head gland (14).
16. Remove the heavy-duty rod wiper (15).
Note: An additional O-ring may be included at the base
of the rod on some units. This additional O-ring may be
discarded, as it served only in a temporarily protective
role to keep paint off the rod while the cylinder was
painted at the factory.
17. Remove the precision wearband (11) and deep Z-
seal with rod backup (12) from inside the head gland
(14).
Note: Discard all seals and O-rings. Always replace
seals, O-rings, gaskets, etc. with new parts to help
ensure proper sealing and operation.
Model 3606 • Origin 10/99