4570Man
Super Star Member
- Joined
- Apr 7, 2015
- Messages
- 17,829
- Location
- Crossville, TN
- Tractor
- Kubota M59, Kubota L3800, Grasshopper 428D, Topkick dump truck, 3500 dump truck, 10 ton trailer, more lighter trailers.
If the thermostat is out, the radiator is not clogged, and the fan has its blades and spins when running (loose belts), it points to a water pump that the impeller may be slipping or have a shear pin that has been sheared or more likely the belt is broken/missing or too loose.
If the system is at least reasonably clean, the fan turns, and the thermostat is out, it is almost surely the water pump impeller or belt preventing the coolant from circulating.
Dane…
The water pump is good. In this picture it’s got a water hose hooked up but it emptied the radiator at the same or faster rate on its own.