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You are welcome! NAPA part numbers: Filter #4070 and bracket #FIL4019. You will need 5/8 ID hose, Tee's if you have a heater and hose clamps. The connection points are the same as those for the heater. The filter is a "by-pass" type filter and only filters a portion of the coolant at a time, but...

Is this what you need?

1ton, here is a more sophisticated cooling system: http://imageevent.com/cranetruck/enginetempcontrol (If you can't read the copy, let me know and I repost it here)

You are welcome LH7. 1ton, when I say primitive, I refer to the control system. It has been brought up before, but electric fan(s) and a radiator shutter under thermostat control could keep the engine temp to within a few degrees of ideal at all times. Just by installing an accurate thermometer...

Longhunter7, in my previous post, "primitive" refers to the control system, which consist of one thermostat and nothing else. As far as the coolant, here is a summary of points: 1) Change coolant at least every two years. The coolant has many duties and the effectiveness of the coolant...

Robert, At idle, the multifuel will probably never reach operating temp. The engine only burns enough fuel to keep turning over, about 1 gallon/hour. It's when using the crane at standstill that the winter cover serves its purpose. At 1,200 rpm the engine will get to 180 or so in 15 minutes with...

DR, a 25 amp dc-generator plus separate regulator (black box on the fire wall) was the original system, from the 1960's anyway.

Running an electric fan is a good option because you can easily control it, however , electric power is not free. With an electric fan you will have to upgrade to a 60 amp aleternator. It will still cost a few HP's.

You gotta love the deuce! :-)

There is a thermostat, it begins to open at about 180 and is fully open at 195 or so. Most of the time it is only partially open. If the engine temp gets above 195 then there is no further control of the cooling, the engine is at the mercy of the driver to control the temp. With the quad...

For best performance you need to be able to control ALL the cooling devices. The system shown for the firetruck uses controls for the fan, the radiator shutters and the flow of the coolant and the result is an engine temp that only varies plus or minus a few degrees. Driving up and down hills...