Lull 944E-42, Service Manual

Page: 494 / 844

Hydraulic System
8.244 Model 644E-42/944E-42 Rev. 6/04
f. Transfer Carriage Cylinder Installation
1. Install the transfer carriage cylinder back onto the
frame and transfer carriage. Refer to Section
11.3.19, “Transfer Cylinder Replacement.”
2. Remove all tools, etc. from the vehicle.
3. Start the engine and run at approximately one-third
to one-half throttle for about one minute without
moving the vehicle or operating any hydraulic
functions. Operate the joystick to fully extend and
retract the cylinder at least five times each.
4. Inspect for leaks and check the level of the hydraulic
fluid in the reservoir. Shut the engine OFF. Add
hydraulic fluid to the reservoir as required.
5. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle, work area and tools.
g. Transfer Carriage Cylinder Pressure Checking
and Circuit Bleeding
1. Attach a 5000 psi (345 bar) gauge to the main
control valve to test the transfer carriage cylinder
hydraulic system circuit pressure. The unit is
equipped with test fittings from the factory. Refer to
Section 8.7, “Hydraulic System Testing.”
8.14.12 Swing Carriage Cylinder (Optional)
The optional swing carriage provides a way to swing the
carriage attachment from side-to-side. The swing
carriage includes two cylinders (1) that operate to provide
the side-to-side motion.
a. Swing Carriage Cylinder Removal
1. Level the boom (place the boom in a horizontal
position).
2. Swing the carriage to the centered position.
3. Lower the boom until the carriage is resting firmly on
the ground.
4. Place the travel select lever in the [N] NEUTRAL
DETENT position, engage the park brake switch and
shut the engine OFF.
WARNING:
Avoid prolonged engine
operation in closed areas with inadequate
ventilation. Failure to properly ventilate exhaust
fumes can result in death or serious injury.
WARNING:
Escaping hydraulic fluid
under pressure can penetrate the skin, causing
death or serious injury.
MT2450
1