Posted by 137 farm on December 31, 2020 at 06:45:36 from (98.103.145.150):
I have a PC180 LC-3 Komatsu trachoe that over heats after running for a couple hours, the low oil pressure light comes on then also(only when it gets too hot). It cools down faster if I leave the engine running fast vs putting at idle and the low oil pressure light goes off once it cools a little. I can leave the engine compartment hood open and it does not over heat. I had the water radiator cleaned, put new antifreeze and water into that goes down to about -20' when tested. I have replaced airfilters, the water flow from the water pump is strong at the hose going to the heater core in the cab. Put on new fan/water pump belts already. There is some engine oil that comes out a crank case vent on the back side of the engine where the hydraulic oil pump mounts to the engine. The engine does not use oil or smoke. I never lose radiator water or have oil in the water or water in the oil. The engine has 10,000 hrs on it, I don't know if had been rebuilt in the past, I purchase it around with 9,400 hrs.
My question is could this be a weak oil pump? If so are any of you familiar with these and is the engine oil pump inside the oil pan, I believe this is a S6D95 model Komatsu engine? Or what else could it be?
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