The oil pressure alarm may appear during the use of the excavator, and some operators do not know what causes it. This article will summarize several causes of excavator oil pressure alarm.
1. The oil radiator leaks oil
External leakage will pollute the engine surface and reduce the pressure. Internal leakage makes the oil enter the water tank, the heat dissipation effect of the cooling system becomes worse, the engine overheats, the oil becomes thinner and the pressure drops. Remove the radiator, repair or replace it and restore its function.
2. Inappropriate engine oil model
Different engines need to add different grades of engine oil, and engines of the same model should also use different grades of engine oil in different seasons. If the selected engine oil is inappropriate or inferior, the leakage will be increased and the pressure will be reduced due to low viscosity when the engine is running. The engine oil shall be selected correctly and reasonably to adapt to different models or seasons.
3. The oil pump does not rotate
If the drive gear of the oil pump and the flat key of the drive shaft are damaged or fall off. The damage of the filter collector will make the oil pump suck in foreign matters and the gear is stuck, which will stop the oil pump and reduce the oil pressure to zero. At this time, replace the damaged flat key or filter collector.
4. The oil pump is worn
When the clearance between the oil pump shaft and the bushing, the clearance between the gear end face and the pump cover, the tooth side clearance or radial clearance is too large due to wear, the pump oil volume will be reduced and the oil pressure will be reduced. At this time, replace the worn parts and grind the inner plane of the pump cover to restore the gap between it and the gear end face to the standard range.
