13 transmission temperature switch, 14 fuel level gauge and fuel level sender, Transmission temperature switch – Lull 944E-42 Service Manual User Manual

Page 190: Fuel level gauge and fuel level sender

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Electrical System

9-32

944E-42

c. Coolant Temperature Switch Installation

1. Thread the switch into the engine. Tighten securely.

2. Connect the previously labeled wiring connector to

the switch.

3. Properly connect the batteries.

4. Start the engine. Allow it to reach operating

temperature and observe the operator’s instrument
cluster for warning indication. If the switch 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 cluster,
etc.

5. Close and secure the engine cover.

9.11.13

Transmission Temperature Switch

The transmission temperature switch (6) is threaded into
the rear of the transmission below the main hydraulic
pump.

a.

Transmission Temperature Sender Removal

1. Park the machine on a firm, level surface, level the

machine, fully retract the boom, raise 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 batteries.

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. Properly connect the batteries.

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.

9.11.14

Fuel Level Gauge and Fuel Level
Sender

The fuel level gauge can be found on the operator’s dash
panel. The fuel level sender is mounted in the top of the
fuel tank.

a. Fuel Level Gauge Testing

1. This test requires an assistant in the operator’s cab.

2. The fuel level sender wiring harness connector and

the cab harness connector, can be accessed at the
right rear corner of the cab. Disconnect the two
connectors. With a piece of wire, touch both pins
inside the cab harness connector.

3. From the operator’s cab, have the assistant turn the

ignition key switch to the RUN position. DO NOT
start the engine. Observe the fuel level gauge
needle on the operator’s dash panel. The reading
must be at the FULL mark after the engine startup
bulb test is completed.

4. Turn the ignition key switch to the OFF position. The

fuel level gauge needle should return to the EMPTY
position.

MU4531

6

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