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For the likes of me, I can not get coolant to flow through the heater core. We changed the thermostats a couple years ago as the tractor was always running cold (by the gauge) and ever since we have little to no heat. I can't remember if the heat was getting poor and if that was part of the reason for changing the thermostats? (Bad memory, I know!) We changed the heater hoses as I thought maybe there was a collapsed hose, didn't help. Can't remember exactly when we changed it but know it ran last winter with little heat, but mostly just use it for pushing snow and there was no snow last year so only had it going a couple times. Sometimes it would have some heat if it was wound up, but at idle it cools off instantly. So this winter I removed the thermostats again to check them out, they are installed correctly and open at the right temps. I put a tap on one hose so we could pressurize the system to get coolant flowing through the core. Have loosened the hoses at the core to try get any air out, coolant runs out.
Which way should the coolant flow? I would think it should go from the hose that is connected right to the top of the pump, but if I remove the hose that is connected to the thermostat housing, little to no coolant comes out. I rigged it so we could remove the hose from the pump, and it flowed some, but only maybe half capacity of the hose or even less, but to me this seems backwards. Ran it again and have some heat, but again as soon as it goes to idle, the heat stops instantly. I took the front cover off the pump and it's not broken and turns with the engine, is it possible for the pump to wear enough that it wouldn't push the coolant up to the top of the cab but still cool the engine? Have tried everything to bleed out any air, but can't seem to get it to circulate. No the AC isn't running and the coolant is topped up. If it is air locked, what's the trick to get it out? Where the hoses connect to the core aren't easy to get to and can't connect a hose up there to pour coolant in there to get the air out. The flow control also works, so I know it opens up.
Any ideas?
Which way should the coolant flow? I would think it should go from the hose that is connected right to the top of the pump, but if I remove the hose that is connected to the thermostat housing, little to no coolant comes out. I rigged it so we could remove the hose from the pump, and it flowed some, but only maybe half capacity of the hose or even less, but to me this seems backwards. Ran it again and have some heat, but again as soon as it goes to idle, the heat stops instantly. I took the front cover off the pump and it's not broken and turns with the engine, is it possible for the pump to wear enough that it wouldn't push the coolant up to the top of the cab but still cool the engine? Have tried everything to bleed out any air, but can't seem to get it to circulate. No the AC isn't running and the coolant is topped up. If it is air locked, what's the trick to get it out? Where the hoses connect to the core aren't easy to get to and can't connect a hose up there to pour coolant in there to get the air out. The flow control also works, so I know it opens up.
Any ideas?