JLG G12-55A Service Manual - Manual (Page 72)

Cab and Covers
4-6 G10-55A, G12-55A
a. Move the joystick handle rearward, activating the
boom lift function. The boom should RISE.
b. Move the joystick handle forward, activating the
boom lower function. The boom should LOWER.
c. Move the joystick handle to the right, activating
the boom extend function. The boom should
EXTEND.
d. Move the joystick handle to the left, activating the
boom retract function. The boom should
RETRACT.
e. Depress the left side of the switch (optional) to
activate the tilt up function. The attachment
should TILT UP.
f. Depress the right side of the switch (optional) to
activate the tilt down function. The attachment
should TILT DOWN.
6. Close and secure the engine cover.
4.3.5 Frame Sway, Auxiliary and Outrigger
Control Joysticks
a. Joystick 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. Properly disconnect the battery.
4. Remove the screws (8) securing the dash panel (9)
to the cab. Remove the dash panel.
5. Remove any hardware securing the joystick to the
cab.
6. Label, disconnect and cap the hydraulic fittings
attached to the joystick.
7. Remove the joystick from the cab.
b. Joystick Installation
1. Uncap and connect the previously labeled hydraulic
hoses to their appropriate locations.
2. Install the bolts securing the joystick to the cab.
3. Install the dash panel to its original position with the
previously used hardware.
4. Properly connect the battery.
5. Test the complete range of the joystick functions:
6. Close and secure the engine cover.
4.3.6 Windshield Wiper Assembly
Refer to Section 9.8, “Window Wiper/Washer Windshield
Wiper Motor,” for removal and installation information.
4.3.7 Heater/Air Conditioning System
(if equipped)
Note: If machine is equipped with air conditioning,
DO NOT loosen or disconnect any air conditioning hoses
until the air conditioning system has been properly
drained by the local distributor or certified air
conditioning service center.
a. Heater Assembly 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 park brake and shut the engine
OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the 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. Place a suitable container beneath the radiator.
Slowly turn the radiator cap to the first stop, allow
any pressure to escape. Remove the radiator cap.
6. Place a funnel at the base of the radiator to channel
the drained coolant into the container. Loosen the
drain petcock and allow the coolant to drain.
7. Transfer the coolant to a container with a cover, and
label as “Used Antifreeze.” Dispose of the used
coolant at an approved recycling facility.
8. Tighten the radiator drain petcock.
9. Remove the bolts that secure the seat to the cab.
Remove the seat.
MY0960
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