Lull 944E-42 Service Manual User Manual download pdf (Page 506)

100

101

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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