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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Mar 2005 Posts: 23 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 23 | I'm working on my '47 3100 that was my wife's Grandfather's truck. The truck has a Harrison H-01-46 heater that appears to be the original. This is the Deluxe model using two motors, one for the heat and one for the defrost. I'm going to convert the electrical system to 12 volts and will replace the motors. I thought this would be an easy task but have yet to come up with anything that fits. I've searched this site and spent a lot of time on the internet and can't find what I'm looking for. Several people have used the VDO 354 in their fresh air heaters. The problem I have is this motor is 3" in diameter and the center of the heater core is 2 7/8" at best. Has anyone overcome this problem? Is there a 12 volt equivalent to the 6 volt motors I have? | | | | | Joined: Apr 2016 Posts: 102 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 102 | ShopTeach, Check out this site. http://devestechnet.com/Home/HeaterRestoreDeve has some good info. I am unfamiliar with the 2 blower set up, but it may get you started. Jon | | | | | Joined: Mar 2005 Posts: 23 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 23 | I've read that article. Unfortunately the fresh-air heaters allow for the 3" diameter motor where mine doesn't. The motor fits inside the heater core which limits the size. | | | | | Joined: Apr 2007 Posts: 1,038 'Bolter | | 'Bolter Joined: Apr 2007 Posts: 1,038 | If your stock motors work, why not put a resistor in the circuits for both motors for the 12 volt conversion. That is what I did on my '42 and they work great. I don't remember what resistor was used but someone can chime in with the answer, if that is the direction you would want to go.
Kent
P.S. This would work from Jim Carter http://www.oldchevytrucks.com/cart/product.asp?prodid=EL135&i=9776||||| Use one for each motor.
Last edited by Lightholder's Dad; 12/12/2018 5:12 PM.
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