AFAIK the heat on these cabs was never very good to begin with, so if you're getting any heat at all, you are ahead of the game.
First thing make sure the valves are open. If you trace the lines back to the engine there should be a valve somewhere on each line to cut off flow for summer.
Second thing is make sure coolant CAN flow. Close the valves, disconnect the lines and try to blow through them with a garden hose. Maybe your heater core is plugged?
As far as plumbing goes I am trying to remember how it's hooked up on the 1066...
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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