Hello everyone, I have a Komatsu PC90 that overheats after about an hour of use. I have changed all cooling related parts such as new radiator, thermostat, cleaned between radiator and oil cooler, inspected fan and foam seals around fan. Nothing has not improved it. I can run without issues if the outside air temperature is cold, but if it gets hotter than about 50deg F out, I have to take many breaks and run with hood open.
In the past I have had a leaking engine oil seal into the bell housing from one side and a leaking hydraulic pump seal into the bell housing from the other but the engine seal has been repaired. I still have the leaking seal in the hydraulic pump that is causing me to have to drain the bellhousing daily before running.
After reading many posts on here, I am wondering if this leaking hydraulic pump seal is related to my engine overheating issue. Any guidance would be appreciated. I have been dealing with this issue for >10 years. Thanks!
I have had a couple people come out to look at it but they couldnt figure it out. One guy thought it might be a blown head gasket but it doesn't consume any engine oil and I dont have any air or bubbles in my coolant so I think that is ok. Any ideas? (I have seen some similar issues on here and many knowledgable members chimed in to help. I look forward to hearing from John C. as well as others.) Thanks everyone!
In the past I have had a leaking engine oil seal into the bell housing from one side and a leaking hydraulic pump seal into the bell housing from the other but the engine seal has been repaired. I still have the leaking seal in the hydraulic pump that is causing me to have to drain the bellhousing daily before running.
After reading many posts on here, I am wondering if this leaking hydraulic pump seal is related to my engine overheating issue. Any guidance would be appreciated. I have been dealing with this issue for >10 years. Thanks!
I have had a couple people come out to look at it but they couldnt figure it out. One guy thought it might be a blown head gasket but it doesn't consume any engine oil and I dont have any air or bubbles in my coolant so I think that is ok. Any ideas? (I have seen some similar issues on here and many knowledgable members chimed in to help. I look forward to hearing from John C. as well as others.) Thanks everyone!