Lull 944E-42 Service Manual - Manual (Page 508)

Hydraulic System
8.256 Model 644E-42/944E-42 Rev. 6/04
f. Side Tilt Carriage Cylinder Installation
1. Install the side tilt carriage cylinder (2) onto the side
tilt carriage (1). Secure the rod end to the side tilt
carriage with the cylinder rod pin (6) and snap
rings (4). Secure the tube end to the pivot base (7)
with the cylinder base pin (5) and snap rings (4).
2. Lubricate the pivot pins (5 and 6) with multi-purpose
grease.
3. Remove all plugs and caps from the hydraulic
lines (3) and securely tighten the lines to the
cylinder.
4. Start the engine and remove any blocking from the
carriage.
5. Tilt the side carriage five times through its full range
or until operation of the side tilt carriage is normal
(no jerks or spongy feel).
6. Shut the engine OFF. Check the hydraulic level and
fill as required.
g. Side Tilt Carriage Cylinder Pressure Checking
and Circuit Bleeding
1. Attach a 5000 psi (345 bar) gauge to the main
control valve to test the swing carriage cylinder
hydraulic system circuit pressure. The unit is
equipped with test fittings from the factory. Refer to
Section 8.7, “Hydraulic System Testing.”
2. Start with the side tilt carriage cylinder balanced;
that is, with the carriage level and centered, not
tilted.
3. Tilt the carriage fully left. Hold the joystick at full tilt
left for several seconds, then tilt the carriage fully
right and hold the joystick at full tilt right for several
seconds.
4. Center and level the carriage.
5. Repeat Steps 3 thru 4 five times.
WARNING:
Escaping hydraulic fluid
under pressure can penetrate the skin, causing
death or serious injury.
WARNING:
Avoid prolonged engine
operation in closed areas with inadequate
ventilation. Failure to properly ventilate exhaust
fumes can result in death or serious injury.