jasonharville
Well-Known Member
I've been having some issues with my D65e-6 gradually overheating after about 2 hours of use. I have started troubleshooting based on engine/dozer service manuals but hoping to get some additional advice here. Here are the areas I've been focusing on:
One other thing I'll mention. When the machine hits the 200 mark, it will often stop running before I have the chance to let it cool down. It seems to be fuel supply related as it slowly dies then if I try to crank it a few minutes later it will start to fire for a few seconds and then nothing. Wait 30 minutes and it fires right up. My theory is that once the temp hits a certain mark the fuel lines running through the heads are getting vapor locked or something. This is a Cummins N855. Does this sound like a good theory on the engine dying?
- Low Fluids - I have been carefully watching coolant/fluid levels...hasn't been a factor.
- Stalling Torque Converter Excessively - I'm new to dozer operation and I realized I may have been stalling the torque converter too often when hitting large stumps. I think I have ruled this cause out as last time it overheated I was being "gentle" on her.
- Slipping Fan Belt - Belt appears to be properly tensioned and haven't noticed any lack of air flow.
- Dirty/Clogged Radiator - I noticed an inability to see through the radiator so I started pressure washing it yesterday. An hour later I was still getting muddy water from it but I think I finally got it clean.
- Failed Thermostat - Ordered a new thermostat as the housing doesn't look to have been touched in a long while.
One other thing I'll mention. When the machine hits the 200 mark, it will often stop running before I have the chance to let it cool down. It seems to be fuel supply related as it slowly dies then if I try to crank it a few minutes later it will start to fire for a few seconds and then nothing. Wait 30 minutes and it fires right up. My theory is that once the temp hits a certain mark the fuel lines running through the heads are getting vapor locked or something. This is a Cummins N855. Does this sound like a good theory on the engine dying?