NUT 2U2576 - Caterpillar

Introduction
Troubleshooting can be difficult. The following pages contain a list of possible problems. In order to make a repair to a problem, refer to the cause and the correction of the problem.The list on the following pages will provide the following information:
Known problems
Probable causes of known problems
Repairs in order to correct known problemsNormally, additional repair work is needed beyond the recommendation in the list.Remember that a problem is not normally caused by only one part. The problem's cause can be related to problems with other parts. This list does not include all possible problems and corrections. The service technician must find the problem and the problem's source. After the problem's source is determined, the service technician can make the necessary repairs.Troubleshooting Problem List
The Shutoff Solenoid Fails To Stop The Engine.
The Contactor Switch For Water Temperature Does Not Activate The Shutoff Solenoid.
The Contactor Switch For Water Temperature Activates At Wrong Temperature.
The Contactor Switch For The Oil Pressure Does Not Activate The Shutoff Solenoid.
The Electrical Gauges Give Wrong Readings.
There Is No Output From The Governor.
The Engine Has Slow Response To A Change In Speed Setting Or Load.
The Engine Speed Does Not Have Stability.
The Engine Will Not Drive A Full Load.
The Clutch Will Not Engage Or The Lever Moves To The Released Position.
The Clutch Shaft Has Too Much End Play.
The Clutch Bearing Has Short Life. Troubleshooting Problems
Problem 1
The Shutoff Solenoid Fails To Stop The Engine.Probable Cause
There Is A Poor Connection. Check connections and wiring.
The Adjustment For The Plunger Shaft Is Incorrect. Make adjustments to the plunger shaft.
The Plunger Is Incorrect In The Shutoff Solenoid. Install the correct plunger shaft.
There Is Not Enough Plunger Travel. Make an adjustment to the plunger shaft. Replace the solenoid if it is necessary.Problem 2
The Contactor Switch For Water Temperature Does Not Activate The Shutoff Solenoid.Probable Cause
There Is Low Water Level In The Cooling System. Fill the cooling system.
There Is A Poor Connection. Check connections and wiring.
The Water Temperature Contactor Switch Has Failed. Check the water temperature contactor switch.
The Setting Of Switch Is Incorrect. Make a test of temperature setting. Install a new contactor switch with the correct setting if it is necessary. See Specifications.
There Is A Failure Of The Shutoff Solenoid. Check the shutoff solenoid.Problem 3
The Contactor Switch For Oil Pressure Does Not Activate The Shutoff Solenoid.Probable Cause
There Is A Poor Connection. Check the connections and wiring.
The Setting Of The Switch Is Incorrect. Make a test of the temperature setting. Install a new contactor switch with the correct setting if it is necessary. See Specifications.Problem 4
The Electrical Gauge Gives The Wrong Reading.Probable Cause
There Is A Poor Connection. Check the connections and wiring.
The Sending Unit Has Failed. Check the sending unit. Install a new sending unit if it is necessary.
The Resistor In A 32 Volt System Has Failed. Install a new resistor.
The Sending Unit Is Incorrect. Install the correct sending unit.
The Gauge Is Incorrect. Install the correct gauge.Problem 5
There Is No Output From The Governor.Probable Cause
The Engine Cranking Speed Is Too Slow. Make reference to Troubleshooting in