SkyTrak 8042 Service Manual - Manual (Page 567)

Hydraulic System
8.152 Model 8042, 10042, 10054 Legacy Rev. 10/03
4. Extend the rod (1) to allow access to the base of the
cylinder.
IMPORTANT: Protect the finish on the rod at all times.
Damage to the surface of the rod can cause seal failure.
5. Using a pin spanner wrench, unscrew the head gland
(2) from the tube (3). The head gland was originally
torqued at 300-400 lb-ft (407-542 Nm), so a
considerable amount of force is required to remove it.
Carefully slide the head gland down along the rod
toward the eyelet end, away from the cylinder tube (3).
IMPORTANT: When sliding the rod and piston assembly
into the tube, prevent the threaded end of the tube from
damaging the piston (4). Keep the rod centered within
the tube to help prevent binding.
6. Carefully pull the rod (1) with all attachments straight
out of the tube (3).
7. Fasten the rod end in a soft-jawed vise and put a
padded support below and near the threaded end of
the rod to help prevent damage to the rod.
8. Remove the o-ring (5), back-up ring (7) and o-ring
(8) from the head gland (2).
9. Remove the locking inserts (6) from their installation
holes in the head gland threads. Pry or drill out the
inserts as required. DO NOT damage the head
gland threads. New locking inserts will be required
for reassembly.
10. Remove the precision wearbands (9) and the
capped T-seal (10) from the piston (4).
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” itself.
MH2911
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