2806帕金斯發動機冷卻液溫度傳感器

Coolant temperature sensor

2800

To test

Special requirements

Operation 2-2

Special tools
Description	Part number
Thermometer	GE5002

Check the accuracy of the coolant temperature sensor (A2) if one of these conditions exist:

The engine runs at a temperature that is too hot, but a normal temperature is indicated. A loss of coolant is

found.

The engine runs at a normal temperature, but a hot temperature is indicated. No loss of coolant is found.

Note: The coolant temperature can be read on the display screen of the electronic service tool.

Warning! On a hot engine release the filler cap carefully as the system will be under pressure.

  When the engine is  cool, release the coolant filler cap to relieve any pressure.

2  Remove one of the two plugs (A) and install the special thermometer, GE5002. A temperature indicator

of known accuracy can also be used for this test. Tighten again the coolant filler cap.

  Start the engine and run the engine until the temperature reaches the desired range according to the test

thermometer. If necessary, place a cover over part of the radiator to cause a restriction of the coolant flow. The

reading on the coolant temperature indicator should agree with the test thermometer within the tolerance range

of the coolant temperature indicator.

Pointer position	Test thermometer °C	Test thermometer °F
	65 to 77	50 to 70
2	99 to 0	20 to 28

Caution: If a cover was used ov er part of the radiator ensure that is removed on completion of the test.

4  If the temperature sensor is renewed, do not attempt to disconnect the leads from the unit. Disconnect the

unit at the c onnection shown (A).

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