Lull 944E-42 Service Manual - Manual (Page 507)

8.255 Model 644E-42/944E-42 Rev. 6/04
Hydraulic System
IMPORTANT: When sliding the rod and piston assembly
in the tube, prevent the threaded end of the tube from
damaging the piston seal (14). Keep the rod centered
within the tube to help prevent binding.
13. Carefully insert the rod (6) with all attachments
straight into the tube (4). Use a pin spanner wrench
begin to thread the head gland into the tube. Install
new locking inserts (9) into the head gland. Continue
to thread the head gland into the tube and torque to
300-400 lb-ft (407-542 Nm). Remove the
compression tool.
14. Install all new seals on the pilot check valves (5).
Lubricate the valve and rings with clean, filtered
hydraulic oil. Install and torque to 30-35 lb-ft (41-47
Nm). Refer to the Parts Manual for seal kits.
15. If necessary, install both grease fittings (2) into their
threaded holes in the cylinder tube eyelet.
16. Test the side tilt cylinder at low operating pressure
(100 psi or 6,9 bar). Verify that the piston and rod
move freely in both directions.
17. Increase the operating pressure to the maximum for
the cylinder (1750 psi or 120 bar). Verify that the
piston and rod move freely in both directions.
18. Retract the piston fully and cap the hydraulic hose
ports. Install the cylinder (1) on the carriage.
Lubricate the self-aligning bearing (3) via the grease
fittings (2) with multi-purpose grease before
operating the side tilt carriage on the vehicle.