SkyTrak 8042 Service Manual - Manual (Page 571)

Hydraulic System
8.156 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. Remove the lock screw (2) from the flange of the
head gland (3).
6. Using a pin spanner wrench, unscrew the head gland
(3) from the tube (4). The head gland was originally
torqued at 300 ±50 lb-ft (407 ±68 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 (4).
IMPORTANT: When sliding the rod and piston assembly
into the tube, prevent the threaded end of the tube from
damaging the piston (5). Keep the rod centered within
the tube to help prevent binding.
7. Carefully pull the rod (1) with all attachments straight
out of the tube (4).
8. 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.
9. Remove the o-ring (6), back-up ring (7) and o-ring
(8) from the head gland (3).
10. Remove the precision wearbands (9) and the
capped T-seal (10) 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” itself.
11. Remove the locknut (11) from the rod (1). The
locknut was coated with Loctite #271 (red) and
torqued to 1650-1800 lb-ft (2237-2440 Nm).
MH4320
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