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Just a couple points of clarification: The water pump casting has two beefed up areas that look like they were designed to be drilled and tapped, however the machine work just wasn't done. The holes (if drilled) look like they would hit the inlet and outlet areas in the pump housing, but don't look like they would affect the pump opperation itself. The picture in Deere's on line 970 parts manual shows the configuration pretty well. One thing about this approach is, that it would tap into the coolant system just upstream of the thermostat. I guess I can see a plus (hotter water) and a minus (could keep the engine temp down when it's burr chilley outside as this approach would bypass the thermostat). The heater itself came with the used Sims cab purchase - so I already have it. Looking on line at the Curtis unit I think they're maybe the same heater manufacturer. Maybe the answer is to call Curtis and try to get just the radiator hose "cut in" fittings. The radiator hose approach would save dropping the loader and pulling the water pump off - plus save me about $300 if I manage to screw something up. Thanks to all for input so far. Anybody with hands on knowledge would still be appreciated.<br>
Dan

Heater Instll on JD 970
John Deere Tractors
Replies 5 Post by danstein