JLG sky trak mmv Service Manual page 448

Hydraulic System
Note: If a white, powdery residue remains on the
threads and parts, clean the residue away with a soft
brass wire brush prior to reassembly, and wipe with Loc-
tite "T" cleaner before proceeding.
7. Apply Loctite Threadlocker #271 (red) to the
locknut (13). Thread the locknut onto the rod (3) and
torque to 750-800 lb/ft (1017-1085 Nm). The threads
will deform upon tightening, locking the nut in place.
8. Install the capped T-seal (11) and precision
wearband (10) onto 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.
9. Install new oiled o-ring (6), back-up ring (7), locking
insert (8) and oiled o-ring (9) onto the head gland (4).
9.150
14
16
17
5
11
10
13
2
15
4
1 9
8
7
6
19
IMPORTANT: When sliding the rod and piston assembly
in 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. Protect the finish on the
rod at all times. Damage to the surface of the rod can
cause seal failure.
10. Carefully insert the rod (3) with all attachments
straight into the tube (2).
11. Using a pin spanner wrench, thread the head
gland (4) into the tube (2). Torque the head gland to
250-300 lb/ft (339-407 Nm).
f. Slave Cylinder Installation
1. Align the slave cylinder with its mounting bosses
within the rear frame uprights.
2. Align the mount pin bolt holes with the slave cylinder
mount holes. Align the self-aligning bearing. Secure
the slave cylinder with the cylinder pins, capscrews
and nuts. Torque the capscrews and nuts to
specification. Refer to the fastener torque chart in
Section 2.3, Torques .
3
18
12
MT1940
Model MMV Rev. 12/04