Buhler 2335, 2425, 2290, 2375, 2360 manual Operation

SECTION 2 - OPERATION

Low Engine Oil Pressure (140--210 kPa (20--30 psi)) at Engine Speeds

Above 1200 rpm

The Module on the Cummins engine will react to a condition of low engine oil pressure (140 -- 210 kPa (20--30 psi)) when the engine speed is above 1200 rpm. The quantity of oil in the lube circuit is not adequate to properly protect the engine components at the selected engine speed (normal oil pressure for engine speeds above 1200 rpm is 210 -- 345 kPa (30--50 psi)). See “Engine” in Section 4 of the Operator’s manual for possible causes of low engine oil pressure. Failure to correct the low oil pressure condition can cause serious damage to the engine. The following description details the reaction of the EICS, Cummins Module and audible alarm in the event of low engine oil pressure when engine speed is above 1200 rpm:

With the engine running at a speed above 1200 rpm and the engine lubrication pressure between 140 -- 210 kPa (20--30 psi), no warning lights will be illuminated on the EICS of the tractor.

The module, 1, will sense the low oil pressure condition and begin an engine speed/engine power derate. The module will lower the engine rpm to a preset level (1400 rpm) allowing no acceleration of the engine above that level AND lower the horsepower output of the engine a preset amount (20% of gross horsepower) as long as the low engine oil pressure condition exists.

Both the speed and engine power derate will be gradual and simultaneous. Elapsed time of the speed and power derate from maximum horsepower and 2100 engine rpm to the 1400 rpm and 20% reduced horsepower output level will be approximately 25 seconds (approximately 40 rpm/second, and 1% horsepower/second). This reduced speed and power output mode will allow the Operator to move the tractor from an undesirable location and correct the concern.

ATTENTION: The engine will continue to run while not receiving adequate amounts of lubrication. Serious engine damage can result from running the engine in this condition. It is imperative that the low engine oil pressure condition be investigated as soon as possible so as to avoid serious engine damage.

2-77

1

Figure 2-109