JLG 723A Service Manual - Manual (Page 146)

Electrical System
9.38 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
4. Start the engine, and observe the operator’s display
for warning indication. If the sender is not defective,
the problem could be elsewhere; possibly in a
shorted wire, improper-running engine, low oil,
obstructed or faulty oil pump, defective instrument
display.
5. Close and secure the engine cover.
6. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.14.8 Oil Temperature Sensor
The oil pressure sensor is located on the side of the
engine oil pan.
a. Oil Temperature Sensor Removal
1. Park the machine on a firm, level surface with the
machine level, retract and level the boom. Place the
transmission control lever in the (N) NEUTRAL
position and engage the parking brake. 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. Allow the engine and all system fluids to cool.
4. Properly disconnect the battery.
5. Disconnect the wiring connector at the oil pressure
sensor lead.
6. Remove the sensor (3) from the adaptor on the side
of the oil pan.
b. Oil Temperature Sensor Inspection and
Replacement
Inspect the sensor and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sender with a new part.
c. Oil Temperature Sensor Installation and Testing
1. Install the oil temperature sensor into the adaptor on
the side of the engine oil pan and tighten.
2. Connect the wiring harness connector to the sensor.
3. Properly connect the battery.
4. Check for proper oil level.
5. Start the engine, and observe the operator’s display
for warning indication. If the sensor is not defective,
the problem could be elsewhere; possibly in a
shorted wire, improper-running engine, low oil,
obstructed or faulty oil pump, defective instrument
display.
6. Close and secure the engine cover.
7. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.14.9 Back-up Alarm
The back-up alarm is located at the rear of the machine.
When the park brake is released and the transmission
shift control switch (transmission control lever) is shifted
to the (R) REVERSE position, the back-up alarm will
automatically sound.
Place the transmission control lever in (R) REVERSE to
test the back-up alarm. The back-up alarm must not
sound when the transmission control lever is in (N)
NEUTRAL or (F) FORWARD. Also, with the ignition key
switch in the RUN position, the back-up alarm will sound
when the transmission control lever is shifted into the (R)
REVERSE position.
a. Disassembly
DO NOT disassemble the back-up alarm. Replace a
defective or faulty alarm with a new part.
b. Inspection and Replacement
Inspect the wiring harness connector and alarm terminals
for continuity and shorting. Test the alarm by turning the
ignition key switch to the RUN position and shifting the
transmission control lever into the REVERSE position.
The alarm should sound.
Replace a defective or faulty alarm with a new part.
MZ5650
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