Lull 944E-42 Service Manual - Manual (Page 443)

8.191 Model 644E-42/944E-42 Rev. 6/04
Hydraulic System
3. Re-attach and secure all hoses and fittings.
4. Reconnect any wire harness connectors.
5. 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.
6. Inspect the single joystick pilot select valve for leaks
and check the level of the hydraulic fluid in the
reservoir. Shut the engine OFF.
Note: Check for leaks and repair as required before
continuing. Add hydraulic fluid to the reservoir as
needed.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle, work area and tools.
8. Reinstall the access plate (15) to the cab floor.
Secure in place with the capscrews (16). Torque the
capscrews to 18 lb-ft (25 Nm).
9. Reinstall the side access panel (17) and secure in
place with the capscrews. Torque the capscrews to
7-8 lb-ft (9,5-10,6 Nm).
d. Single Joystick Pilot Select Valve Test
Conduct a pressure check of the joystick circuit. Refer to
Section 8.7, “Hydraulic System Testing.”
8.12.7 Frame Sway Joystick Valve
The frame sway joystick (18) controls the frame sway
only and is only pilot operated. If the frame sway is not
functioning properly, check the electrical circuits of the
Stabil-TRAK system to ensure proper electrical operation
before considering replacement of this joystick.
Verify the correct operation of the joystick before
considering replacement of the joystick valve. The
capsules are the only serviceable components within the
joysticks.The joysticks must be replaced in their entirety
if replacement is necessary. Refer to Section 4.3.8,
“Front, Rear and Frame Sway Joystick Assembly
Replacement.”
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:
Hydraulic oil leaking under
pressure can penetrate the skin and cause
severe personal injury. DO NOT use your hand
or any part of your body to check for hydraulic
leaks. When checking for hydraulic leaks, wear
safety glasses and gloves to help provide
protection from spraying hydraulic oil. Use a
piece of cardboard or paper to search for
leaks.
MU3770
15
16
17
18
MU6410