Go BottomHeater Instll on JD 970
 | danstein
Join Date: Jul 2003 Posts: 2 Chicago & Northern Wis 
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2002-10-29 44376
I'm looking for a little guidance. I need to install a hot water heater in the newly aquired (used) hard cab on my JD 970. It looks like I can either drill and tap into the water pump casting or try to create (or find) some "T" fittings to cut into the radiator hoses. The tractor lives 450 miles north of home so I looked at picking up a 2nd water pump to drill and tap at home before heading up there. At $300 for a new pump it was too big a hit on the beer fund and decided it needed to all be done up there. I see two flats on the top rear of the pump casting that look like likely spots to drill and tap into the system, but thought somebody out there may have already done this install and may want to share their experience. Any thoughts would be appreciated. Should I remove the pump from the engine prior to drilling etc to keep the "chunks" out of the cooling system? Are pilot holes a good idea to keep from cracking the pump casting? etc????? Any input is appreciated. Dan
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Add PhotoHeater Instll on JD 970
| XAC0695
Join Date: Jul 2003 Posts: 3 EPHRATA PA
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2002-10-30 44421
Dan
Curtis cab makes a heater specifically for that model,part #9PH15S4.It lists for $269.00 and has all the hose and fittings you need,2 speed fan,wiring,switch,etc.You just tee into your radiator hoses.Most tractor dealers should be able yo get it for you,or I think Curtis sells direct.
www.curtiscab.com
The heater is rated 15000 btu ....
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Add PhotoHeater Instll on JD 970
| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley 
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2002-10-30 44422
Lots of imponderables here. I don't think I'd want to just start drilling holes in a casting and especially if I had to use a hand-drill. I suspect that castings that are intended to have ports are designed with walls in the area that are thick enough to support a fitting and allow enough threads to be cut. I also suppose the locations of ports are important to the output pressure and not just any convenient external surface would work. I suppose brazing is an alternative to threaded fittings, but for me I don't think I have the expertise to know what might work.
I noticed in my Ford 1710 parts manual that there is a hot-water heater available but only for European models. However, there is only one water pump for all models. That pump has a 3/8" pipe threaded plug on the top of the pump and I assume it's for a heater. Even if $300 is too pricey, you might check with a dealer to see if a pump (perhaps for models sold outside N.A.) might be available that's intended for cab heaters.
....
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Add PhotoHeater Instll on JD 970
| kwilbe
Join Date: Jul 2003 Posts: 1 illinois
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2002-10-30 44429
I have a curtis heater in my jd4100. It tees into existing hoses and has great output. I would not risk altering pump dynamics by drilling into it. keith ....
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Add PhotoHeater Instll on JD 970
| danstein
Join Date: Jul 2003 Posts: 2 Chicago & Northern Wis
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2002-10-31 44496
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.
Dan ....
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