JLG 4017PS Service Manual - Manual (Page 193)

9-35 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Electrical System
9.12.2 Transmission Oil Temperature Switch
a. Transmission Oil Temperature Switch Removal
The transmission oil temperature switch (7) is located at
the left side of the forward/reverse solenoid 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. Properly disconnect the battery.
5. Unplug the transmission oil temperature switch
connector from the wiring harness connector.
6. The switch is threaded into the transmission
housing. Remove the switch.
b. Transmission Oil Temperature Switch Inspection
and Replacement
Inspect the switch and the wiring harness connector
terminals for continuity. Replace a defective or faulty
switch with a new part.
c. Transmission Oil Temperature Switch Installation
and Testing
1. Thread the transmission oil temperature switch into
the transmission housing snugly, then connect the
switch connector to the wiring harness connector.
2. Properly connect the battery.
3. Check for proper fluid level.
4. Start the engine, allow it to reach operating
temperature and observe the operator display
cluster for warning indication. If the switch 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.
6. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.12.3 Transmission Mounted Speed Sensor
The transmission speed sensor (8) is located on the side
of the transmission bell housing.
a. Transmission Mounted Speed Sensor 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 engine to cool.
4. Properly disconnect the battery.
5. Remove the battery cutoff switch from the air filter
bracket.
6. Remove the fuel filter from the air filter bracket.
7. Remove the electrical relays and fuses from the air
filter bracket.
8. Remove the air cleaner assembly. Refer to Section
7.8.1, “Air Cleaner Assembly Removal.”
9. Remove the air cleaner bracket.
10. Unplug the speed sensor connector from the wiring
harness connector.
11. Loosen the screw holding the clamp and remove the
sensor.
MAM3520
8