Buhler 2290, 2335, 2425, 2375, 2360 manual Low Coolant Level

SECTION 2 - OPERATION

Low Coolant Level

The Electronic Instrument Control System will notify the operator that the engine coolant level has dropped 4.5 L (5.3 US qts) below the acceptable fill level in the radiator. Simultaneously, the module of the Cummins engine will begin an engine derate sequence that will protect the engine from harm due to low engine coolant. A low coolant level condition can overheat the engine, causing extensive engine damage. See “Engine” in Section 4 of the Operator’s manual for possible causes of low engine coolant. Failure to correct the low engine coolant condition can cause serious damage to the engine. The following description details the reaction of the EICS and Cummins module in the event of low engine coolant level:

With the engine running and the coolant level

4.5L (5.3 US qts) below the acceptable fill level in the radiator, the low engine coolant light, 1, on the warning light bar will illuminate. The EICS will not react in any other fashion (no error message, no audible alarm). Pressing the acknowledge/reset button on the dash will not cancel the low coolant level lamp on the EICS. The light will only turn off when the coolant level returns to the proper level.

The module will also sense the low engine coolant level and begin an engine power derate.

Engine speed will not be affected by the derate 1 in power, and the Operator will have full range of

engine speed available using the hand throttle. The module will lower the horsepower output of the engine a preset amount (20% of gross horsepower) as long as the low engine coolant condition exists.

The engine power derate will be gradual as long as the condition exists on the tractor and the engine is running. Elapsed time of the power derate from maximum horsepower to the derate output level will be approximately 25 seconds (approximately 1% horsepower/second). This reduced power output mode will allow the Operator to move the tractor from an undesirable location in order to make repairs.

Figure 2-110

2-79