Buhler 2360, 2335, 2425, 2290, 2375 manual High Engine Coolant Temperature

SECTION 2 - OPERATION

High Engine Coolant Temperature

The Electronic Instrument Control System will notify the operator that the engine coolant temperature has reached a point that will no longer provide adequate cooling, and engine overheating may occur. Simultaneously, the module of the Cummins engine will begin an engine derate sequence that will help protect the engine from harm due to high engine coolant temperature. See “Engine” in Section 4 of the Operator’s manual for possible causes of high engine coolant temperature. Failure to correct the high engine coolant temperature can cause serious damage to the engine components. The following description details the reaction of the EICS and Cummins module in the event of high engine coolant temperature:

With the engine running, and the coolant temperature at 103_C (218_ F), the module will sense the high engine coolant temperature and begin an engine power derate. Engine speed will not be affected by the derate in power, and the Operator will have full range of engine speed available using the hand throttle. The engine power derate will be gradual as long as the high coolant temperature condition exists and the engine is running. The derate will occur in stages based on the temperature of the engine coolant. For every degree of coolant temperature above 103_C (218_ F), the power level of the engine will be reduced 2% of gross engine horsepower, to a maximum of 20% power derate at 103_C (218_ F). An example of this would be an engine that is operating at 106_C (222_ F). The coolant temperature is 3_C (4_ F) over 103_C (218_ F), therefore the derate in power is 8%.

At this point, two choices for continuing operation of the tractor are available. First, the Operator can reduce the load on the engine by shifting down and/or raising the implement out of the ground. Secondly, the Operator can stop the tractor forward motion and allow the engine to run with no load on it.

Electronic Engine

Figure 2-111

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