We have a D722 driving a lineshaft. Currently it has been configured with the fuel solenoid grounded to the block. The solenoid gets power once the oil pressure comes up to "minimum" for the current oil switch. The temperature sensor/switch was replaced at some point with a non-oem switch and was broken when we received the engine. We installed a mechanical temperature gauge. Today, the water pump/fan/generator belt broke. By chance, the engine was checked on (it is in a separate room) and steam was being pushed out of the radiator. The engine was shut down immediately. The gauge read no more than 230-240F. We were lucky.
Thinking about the wiring and about a way to operate the engine that more ensures the engine will not overheat again and remembering that the D722 engine wiring schematics had a one-wire temperature sensor/switch we thought it a better way to wire the engine is to run ground to a thermal disconnect. The engine would have to have oil pressure to start and run. Plus, the temperature would have to be under the temperature cut-off limit of the thermal switch. Does Kubota, or anyone else for that matter, offer a thermal switch for such a purpose? At what temperature should this switch open to shut down the engine?
Thank you
Thinking about the wiring and about a way to operate the engine that more ensures the engine will not overheat again and remembering that the D722 engine wiring schematics had a one-wire temperature sensor/switch we thought it a better way to wire the engine is to run ground to a thermal disconnect. The engine would have to have oil pressure to start and run. Plus, the temperature would have to be under the temperature cut-off limit of the thermal switch. Does Kubota, or anyone else for that matter, offer a thermal switch for such a purpose? At what temperature should this switch open to shut down the engine?
Thank you