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Looking for DuoTherm furnace motor [message #294314] Sun, 24 January 2016 15:00 Go to next message
dservati1 is currently offline  dservati1   United States
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Registered: December 2013
Location: Western New York -Rochest...
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Wondering if anybody who has replaced their furnace has any Duo Therm furnace parts laying around that they'd like to donate or sell cheap? I'm specifically looking for the motor for furunace model #65900 series, part# of the motor 314331 thanks. Dave

'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock David Martin on Facebook
Re: Looking for DuoTherm furnace motor [message #294334 is a reply to message #294314] Sun, 24 January 2016 18:04 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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dservati1 wrote on Sun, 24 January 2016 16:00
Wondering if anybody who has replaced their furnace has any Duo Therm furnace parts laying around that they'd like to donate or sell cheap? I'm specifically looking for the motor for furunace model #65900 series, part# of the motor 314331 thanks. Dave

Dave,

I answered you over on FB, but I put it here in more detail because I don't like the FB format.

Is it locked up?
Or does the shaft turn?
If it is locked up, try penetrating oil on the bearings. When you get it free, let it run unloaded for a little. It may try to over heat without the airflow over it that is is supposed to have so just don't rung it too long.
If the shaft is free, but it doesn't make sparks when you put it on a battery. That is also a common problem, it is probably a hung up brush.
Wrap it with a soft hammed on the end that the wires go in first.
If that doesn't get it, you may have to open it up. This isn't rocket surgery, just pay attention and it will be OK. There may be two lone screws that hold the whole thing together. I hope the nuts are on the brush end.
When you get it open, there are two ways this can go. Either the brush holders are part of the motor frame, or they are on the back plate.
Either way, do what you have to do to get the brushes moving freely. Do not oil them. Look for a cooked spring. It that happened there is a reason, and you will have to find and fix that. Often the lead from the ground brush looses continuity to the brush and the current then goes through the spring and cooks it.

I have done this lots of times and scored about 90%.

Is is worth the effort? You have a 90+% chance to save 1.3 GMC bucks.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: Looking for DuoTherm furnace motor [message #296010 is a reply to message #294334] Mon, 22 February 2016 21:45 Go to previous message
dservati1 is currently offline  dservati1   United States
Messages: 109
Registered: December 2013
Location: Western New York -Rochest...
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Senior Member
Sorry Just saw this on the forum .. forgot to look here I'm on Facebook every few hours.
I did testing that you suggested and the motor was indeed bad.

I ended getting a whole furnace for basically shipping from a member in Seattle. Transplant went well and the unit is firing right up
I have to do a double check on the plenum to ensure no leaks, but right now I have heat to work in the coach during the remainder of winter.

I have the coach covered and the exhaust is trapped under the cover (I have the cover pulled away from side of coach to keep from catching fire, but the fumes are coming in via the leaky kitchen and side window seals, and if I leave the door open the fumes travel over the coach under the cover and enter the coach that way, so I have to keep other windows cracked to keep the fumes down. Smile


'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock David Martin on Facebook
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