JLG G6-42A Service Manual - Manual (Page 81)

4-5 G6-42A, G9-43A, G10-43A
Cab and Covers
9. Support the steering valve, and remove the four
hex-head capscrews and four lockwashers (4).
Note: DO NOT disassemble the orbitrol valve. The
orbitrol valve is not serviceable and must be replaced in
its entirety, if defective.
b. Orbitrol Valve Installation
1. Secure steering valve to steering column with four
hex-flange capscrews and four lockwashers.
2. Install steering column through dash panel opening.
Position steering valve to its original orientation in
the cab.
3. Install travel select lever, connect the instrument
panel harness connector, install the steering wheel
assembly. Torque the steering wheel nut to
29-34 lb-ft (39-46 Nm).
4. Install new o-rings into the steering valve fittings.
Lubricate the o-rings with clean hydraulic oil.
5. Uncap and connect the previously labeled load
sense hose to the steering valve.
6. Uncap and connect the remaining previously labeled
four hoses to the steering valve.
Note: If necessary, install the main dash panel. Refer to
Section 9.11, “Display Gauge and Dash Switches.”
7. Properly connect the battery.
8. Carefully examine all connections one last time
before engine start-up. Rectify any faulty conditions.
9. Start engine and check operation of steering system.
Check for hydraulic fluid leaks. Check hydraulic fluid
level in tank and add fluid as required.
10. Close and secure the engine cover.
11. Remove Do Not Operate Tags from both ignition key
switch and steering wheel.
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 Service Brake Pedal
a. Brake Valve Removal
Refer to Section 8.7.2, “Service Brake Valve,” for removal
information.
b. Brake Valve Installation
Refer to Section 8.7.2, “Service Brake Valve,” for
installation information.
c. Service Brake Pedal Removal
1. Park machine on a firm, level surface, level machine,
fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL position, engage
parking brake and turn the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel.
3. Open engine cover. Allow the system fluids to cool.
4. Properly disconnect the battery.
5. Remove the bolt and lockwasher (1) securing the
service brake pedal pivot pin (2).
6. Pull pivot pin from service brake pedal bracket (3).
7. Remove service brake pedal from cab.
MY8110
1
2
3