Lull 944E-42 Service Manual - Manual (Page 506)

Hydraulic System
8.254 Model 644E-42/944E-42 Rev. 6/04
e. Side Tilt Carriage Cylinder Assembly
Note: Follow the general assembly instructions in
Section 8.14.3, “General Cylinder Assembly
Instructions.”
1. If necessary, press the self-aligning bearings (3) into
the cylinder tube and rod ends. The bearings should
protrude equally from each side of the eyelet.
2. Install the precision wearbands (18) into the rear of
the head gland and the deep Z-seal (19), rod wiper
(20), square ring (21) into the front of the head gland
(7). Orient the Z-seal edge (23). The rod wiper lip
(22) should be toward the outer end of the head
gland and the seal lips toward the inner end of the
head gland. Use tools that will not damage the seals.
3. Install new oiled o-ring (12), back-up ring (11) and
oiled o-ring (10) on the head gland (7).
4. 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.
5. Carefully slide the head gland (7) onto the rod (6). If
necessary, use a soft hammer to drive the head
gland onto the rod.
6. Install a new small oiled o-ring (17) inside the rod
end of the piston (8).
7. Install the capped T-seal (14) and the precision
wearband (13) on the piston (8).
8. Carefully slide the piston (8) onto the rod (6).
9. Apply Loctite Primer “T” and Threadlocker #271
(red) to the threads of the locknut (16) in accordance
with Loctite instructions. Thread the locknut onto the
rod (6) and torque to 550-650 lb-ft (745,6-881,2 Nm).
IMPORTANT: Avoid using excess force when clamping
the cylinder in a vise. Apply only enough force to hold the
cylinder securely. Excessive force can damage the
cylinder tube (4).
10. Fasten the cylinder tube (4) in a soft-jawed vise or
other acceptable holding equipment.
11. Lubricate the piston (8), head gland (7) and the
inside of the tube (4) with clean, filtered hydraulic oil.
12. Apply a compression sleeve or other suitable tool to
the head gland (7) in order to compress the o-ring
(10), back-up ring (11) and o-ring (12).
MU0030
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