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How the heck do the water hoses hook up to the heater? All my hoses have been removed and an inline heater was put in the hose line from the front to the back of the motor. I have four lines to hook up and have no idea where they go. Anybody have a picture of a Ford setup with a temperature controller that is hooked up they could post for me?
As far as I know the '48-50 heater had the one in the fender, it's a very bad design. The '51s & '52 had the Magic Air the had the motor in the heater box. I have also had '48-50 trucks that had the Magic Air heater in them but they could have had these installed later in their lives.
You might have an after market heater. There is one person here who would know for sure. Barry are you out there?
I have recently been refirbishing my heater in my 1950 Merc 1/2 ton. It has the fan in the heater box only, (no fresh air fan in the fender) The same switch operates defrost(2 speeds) and heat (2 speeds) It has 3 doors that you maually open on the front of the heater, and twowater pipes(in and out)To shut the heat off you just closed the valve on the inlet line. I don't think it really matters which line is in or out as the water just circulates through the core. I have another 50 ford parts truck, and a 51 with basically the same set up. Hope this helps.
My 48 f-1 has a fresh air heater. It has the Ford script logo on the front of it and no motor in the heater itself. The only motor is under the fender. As Bob said, a bad idea it was. I have had to replace it. The thermostat valve was in the cab to left of heater itself. So, hot water came to valve first , then back out to a nipple leading into the heater core itself. My themostat went bad and I use an on/off valve right in the water hose to the heater. I think both of Bob's diagrams are for the newer type magic air heaters.
OOps. Sorry. Bob does also show the fresh air heater diagram. In it you'll see the themostat valve also, to control temp. A line goes in that valve and when it's opened hot water is allowed to go into the heater.
So anybody in the Minnesota region not freeze with the factory Ford heater? That fan is pretty wimpy to do allot of good I would think. I have a different unit in my parts truck will have to check it out.
When my dad drove my truck in the early seventies he used it for his service vehicle in his auto repair shop. He used it on a daily basis, winter and summer, here in SE Wisconsin. During the winter it's not much warmer here than in Minnesota and at times much colder. He had the fresh type heater in the truck. He cut a large hole in the firewall and mounted a stronger fan that blew air through the heater. He also cut holes in the front side of the heater, the side facing into the cab, to allow more heat into the cab. As I remember, he could cook you out of the truck with his modifications. He did this because the original configuration didn't work so well. I installed a Magic Air unit when I redid the truck and it seems to work fairly well although I never drive the truck during the dead of winter. I do drive occationally when it gets down into the 40s and it keeps the cab comfortable.
If anybody has that rear section of intake tube (#8702 in the drawing) the section that goes to the firewall I need it. Or if anyone has that section out of the truck and could send me a drawing so I can fabricate one that would be a great help.