JLG 4017PS Service Manual - Manual (Page 194)

Electrical System
9-36 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
b. Transmission Mounted Speed Sensor Inspection
and Replacement
Inspect the sensor and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sensor with a new part.
c. Transmission Mounted Speed Sensor
Installation and Testing
1. Install sensor in transmission, install clamp on
sensor.
2. Connect the sensor plug to the wire harness.
3. Install the air cleaner bracket.
4. Install the air cleaner. Refer to Section 7.8.2, “Air
Cleaner Assembly Installation.”
5. Install the electrical relays and fuses to the air filter
bracket.
6. Install the fuel filter to the air filter bracket.
7. Install the battery cutoff switch to the air filter
bracket.
8. Properly connect the battery.
9. Close and secure the engine cover.
10. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.12.4 Engine Coolant Temperature
Sensor
The engine coolant temperature sensor (9) is located at
the left side of the engine.
a. Engine Coolant Temperature 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 system fluids to
cool.
4. Properly disconnect the battery.
5. Unplug the engine coolant temperature sensor
connector from the wiring harness connector.
6. Loosen and remove the engine coolant temperature
sensor from the engine block.
b. Engine Coolant Temperature Sensor Inspection
and Replacement
Inspect the sensor and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sensor with a new part.
c. Engine Coolant Temperature Sensor Installation
and Testing
1. Apply a lubricate to the o-ring on the water
temperature sensor.
2. Thread the engine coolant temperature sensor into
the engine block. Tighten and torque the sensor to
17-23 Nm (12.5-17 lb-ft).
3. Connect the sensor connector to the wiring harness
connector.
4. Properly connect the battery.
5. Check for proper coolant level.
6. Start the engine, allow it to reach operating
temperature and observe the operator instrument
cluster for warning indication. If the sensor is not
defective, the problem could be elsewhere; possibly
in a shorted wire, improper-running engine, improper
or low coolant, obstructed or faulty radiator, coolant
pump, loose fan belt, defective instrument display,
etc.
7. Close and secure the engine cover.
8. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
9.12.5 Fuel Level Sender
a. Fuel Level Indicator Testing
1. The fuel level sender wiring harness leads can be
accessed from the side of the fuel tank. Disconnect
MZ6 0 84
9