JLG G12-55A AccuPlace Service Manual - Manual (Page 127)

9.9 G10-55A & G12-55A AccuPlace
Electrical System
9.5.2 Universal Ground Control Module
(UGM)
The UGM is located behind the right hand side panel (3)
where the joysticks are located.
a. UGM 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 the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Disconnect the battery negative (-) cable from the
battery negative (-) terminal.
5. Remove the hardware securing the right hand side
panel to the cab. Refer to Section 4.3.5, “Frame
Level, Auxiliary Hydraulic and Outrigger Joysticks.”
6. Disconnect the electrical harnesses attached to the
UGM.
7. Remove the bolts securing the UGM to the cab and
remove the UGM.
b. Disassembly
DO NOT disassemble the UGM. The module is not
serviceable. Replace the module if found to be defective.
c. Inspection and Replacement
Inspect the module terminals for continuity. Replace the
module if continuity is not found.
d. UGM Installation
1. Attach the UGM to the cab with the previously
removed hardware.
2. Reconnect the electrical harnesses to the UGM.
3. Install the right hand side panel to the cab with the
previously removed hardware. Refer to Section
4.3.5, “Frame Level, Auxiliary Hydraulic and
Outrigger Joysticks.”
4. Connect the negative (-) battery cable to the negative
(-) battery terminal.
5. Close and secure engine cover.
MAP0580
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