631G
Senior Member
Need some input on a heating issue we're having with a Bell B40C (SN:BAT3958-98) that we just had the engine rebuilt in. The truck has started heating when pulling/returning from pulling a load but is otherwise fine.
The problem goes something like this:
- Check out the truck crank and warm up = no heating issues
- Sitting in line to be loaded or running around on flat ground = no heating issues
- Get loaded and head to the fill, generally down hill for about 800ft and dump = limited rise in temp which seems to be normal
- Return to loading tool = Temp begins to rise to +/-90-95 Celsius
- In line to be loaded again = Temp continues to rise and rises up to the hottest temp at or just over 100-105 Celsius but will begin to fall after about 90-120 seconds
Below are the things that we have checked:
- Water pumps was purchased new when the motor was rebuilt
- Thermostats were replaced = no change in heating and you can see the gauge moving up and down to indicate they're opening and closing
- Radiator pulled, rodded and dipped = no change in heating
- Viscus fan clutch was pulled and wasn't free spinning or otherwise indicating that the oil was out of it etc.
The engine is a Mercedes OM442LA. I called the shop that built the motor for us and what the tech there says is the temperatures I'm seeing don't sound to be all that hot and maybe this is a non-issue? I am not accustom to seeing these types of temps in the other haul units we have... Is this all in my mind?
The problem goes something like this:
- Check out the truck crank and warm up = no heating issues
- Sitting in line to be loaded or running around on flat ground = no heating issues
- Get loaded and head to the fill, generally down hill for about 800ft and dump = limited rise in temp which seems to be normal
- Return to loading tool = Temp begins to rise to +/-90-95 Celsius
- In line to be loaded again = Temp continues to rise and rises up to the hottest temp at or just over 100-105 Celsius but will begin to fall after about 90-120 seconds
Below are the things that we have checked:
- Water pumps was purchased new when the motor was rebuilt
- Thermostats were replaced = no change in heating and you can see the gauge moving up and down to indicate they're opening and closing
- Radiator pulled, rodded and dipped = no change in heating
- Viscus fan clutch was pulled and wasn't free spinning or otherwise indicating that the oil was out of it etc.
The engine is a Mercedes OM442LA. I called the shop that built the motor for us and what the tech there says is the temperatures I'm seeing don't sound to be all that hot and maybe this is a non-issue? I am not accustom to seeing these types of temps in the other haul units we have... Is this all in my mind?