JLG 4013PS Service Manual - Manual (Page 65)

4-3 3508PS, 3509PS, 3512PS, 3513PS, 4008PS, 4009PS, 4012PS, 4013PS, 4017PS, 40.8, 40.9
Cab and Covers
4.2 OPERATOR CAB
4.2.1 Serial Number Decal
The cab serial number decal is located inside the cab,
behind the seat. Information specified on the serial
number plate includes the cab model number, the cab
serial number and other data. Write this information down
in a convenient location to use in cab correspondence.
4.3 CAB COMPONENTS
4.3.1 Steering Column and Orbitrol Valve
a. Orbitrol Valve Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut 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 battery.
5. Remove the lower dash panel.
6. Remove the steering adjustment lever.
7. Label, disconnect and cap the hydraulic hoses
attached to the steering valve (1). Cap all fittings to
prevent dirt and debris from entering the hydraulic
system.
8. Remove the steering wheel (2), disconnect and
remove the accessory control lever (3) and
transmission control lever (4).
9. Support the steering valve, and remove the four hex-
head capscrews and four lockwashers.
10. Remove the steering assembly from the dash panel.
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. Install the steering valve and steering column to their
original orientation on the steering bracket with four
hex-flange capscrews and four lockwashers.
2. Install the accessory control lever and transmission
control lever and connect the harness connector,
install the steering wheel assembly. Torque the
steering wheel nut to 40 Nm (29.5 lb-ft).
Note: ALWAYS use new o-rings when servicing the
machine.
3. Install new o-rings into the fittings. Lubricate the o-
rings with clean hydraulic oil.
4. Uncap and connect the previously labeled hoses to
the appropriate ports.
5. Install the steering adjustment lever.
6. Properly connect the battery.
WARNING
DO NOT service the machine without following all
safety precautions as outlined in the “Safety
Practices” section of this manual.
MZ2000
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