Lull 944E-42 Service Manual - Manual (Page 64)

Cab and Covers
4-4 944E-42
9. Disconnect the horn button wire from the cab wiring
harness.
10. Support the bottom of the steering valve, and
remove the four capscrews and lockwashers.
Remove the steering valve through the lower dash
panel opening.
11. Remove the steering column (4), by pushing it down,
and removing it through the lower dash panel
opening.
Note: DO NOT disassemble the steering valve. The
steering valve is not serviceable and must be replaced in
its entirety, if defective.
b. Steering Valve Installation
1. Install the steering column and steering valve, by
inserting them through the lower dash panel
opening. Position steering valve in the cab to its
original orientation. Secure the steering valve and
column with the previously used hardware. Torque to
13 lb-ft (18 Nm).
Note: ALWAYS use new o-rings when servicing the
machine.
2. Install new o-rings into the fittings. Lubricate the o-
rings with clean hydraulic oil.
3. Uncap and connect the previously labeled load
sense hose to the steering valve.
4. Install new o-rings into the steering valve fittings.
Lubricate the o-rings with clean hydraulic oil.
5. Uncap and connect the remaining previously labeled
four hoses to the steering valve.
6. Connect the horn button wire to the cab wiring
harness.
7. Install the travel select lever, turn signal lever and
steering wheel. Torque the steering wheel nut to
50 lb-ft (68 Nm).
8. Connect the previously labeled electrical connector to
the display panel. Install the display panel.
9. Properly connect the batteries.
10. Carefully examine all connections one last time
before engine start-up. Rectify any faulty conditions.
11. Start the engine and check the operation of steering
system. Check for hydraulic fluid leaks. Check the
hydraulic fluid level in the tank and add fluid as
required.
12. Install the lower dash panels.
13. Close and secure the engine cover.
c. Steering Test
Conduct a pressure check of the steering hydraulic
circuits at the main control valve. Refer to Section 8.3.1,
“Pressure Checks and Adjustments.”
4.3.2 Steer Select Valve
a. Steer Select Valve Removal
Refer to Section 8.7.12, “Steer Select Valve,” for removal
information
b. Steer Select Valve Installation
Refer to Section 8.7.12, “Steer Select Valve,” for
installation information
4.3.3 Service Brake Valve and Pedal
a. Brake Valve Removal
Refer to Section 8.7.9, “Service Brake Valve,” for removal
information.
b. Brake Valve Installation
Refer to Section 8.7.9, “Service Brake Valve,” for
installation information.
c. Service Brake Pedal Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake and turn the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the batteries.
5. Remove the lower dash panel.