JLG G12-55A AccuPlace Service Manual - Manual (Page 149)

9.31 G10-55A & G12-55A AccuPlace
Electrical System
1. If necessary, install the lift isolation solenoid in its
original orientation.
2. Slide the steer coil over the solenoid. Tighten the nut
to secure the solenoid. DO NOT overtighten.
3. Connect the two wiring connectors to the steer coil
leads.
4. Connect the battery negative (-) cable at the battery
negative (-) terminal.
5. Close and secure the engine cover.
9.11.8 Transmission Solenoid Valves
Note: If the transmission is not shifting properly, the
transmission shift control switch (travel select lever),
wiring harness or transmission shift solenoids (13)
should be checked in order to determine which
component is defective. Specific information to
determine which travel position and corresponding
component is not responding can be found in the
detailed transmission service instructions (covering
repair, disassembly, reassembly and adjustment
information) are provided in the ZF Powershift
Transmission 4WG-92/98 TSC Repair Manual, (JLG P/N
31200241) and can be obtained by calling your local JLG
Service distributor or ZF Service Center.
The transmission should be checked, serviced and
repaired only by experienced service technicians who are
aware of all safety instructions and particular component
features.
Note: Contact the JLG Service Department if internal
transmission repair is required during the warranty
period.
9.11.9 Transmission Temperature Sender
a. Transmission Temperature Sender Removal
The transmission temperature sender (14) is located at
the bottom left side of the transmission housing.
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. Unplug the transmission temperature sender
connector from the wiring harness connector.
6. The sender is threaded into the transmission
housing. Remove the sender.
b. Transmission Temperature Sender Inspection and
Replacement
Inspect the sender and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sender with a new part.
c. Transmission Temperature Sender Installation and
Testing
1. Thread the transmission temperature sender into the
transmission housing snugly, then connect the sender
connector to the wiring harness connector.
2. Connect the battery negative (-) cable to the battery
negative (-) terminal.
3. Check for proper fluid level.
4. Start the engine, allow it to reach operating
temperature and observe the operator’s display
cluster for warning indication. If the sender is not
defective, the problem could be elsewhere; possibly
in a shorted wire, damaged transmission, improper
or low fluid, etc.
5. Close and secure the engine cover.
MY0980
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