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Old 05-02-2011, 11:55 AM
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Join Date: Apr 2011
Location: Fallston, Md
Posts: 36
Blower Motor Brushes Help

I can't seem to find the brushes to repair my 300td Blower motor. I went to a local auto electric place, and they said they can't get the brushes, same with ace hardware, grainger, and anyone else I can think of.

Does anyone have a part number or know of a source to get the brushes? I really need to get this wrapped up, and I can go to the junkyard to get one, but I don't have a way of testing it out.

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Old 05-02-2011, 12:04 PM
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Join Date: Jan 2002
Posts: 18,355
I just went to the local Ace Hardware and started browsing through their brush drawers. I found some slightly bigger and cut and sanded them down to size. Pretty easy.
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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Old 05-02-2011, 12:10 PM
bustedbenz's Avatar
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Join Date: Feb 2007
Location: Lexington, NC or Boone, NC
Posts: 2,272
Originally Posted by kerry View Post
I just went to the local Ace Hardware and started browsing through their brush drawers. I found some slightly bigger and cut and sanded them down to size. Pretty easy.
That's what I had to do, except it was an "electric motor repair shop" instead of a hardware store. Just went through the drawers until I found something that could be trimmed to fit.

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
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Old 05-02-2011, 12:15 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
If you use sandpaper to get them down to the right size... just do NOT use ' wet and dry' the typical Silicon Carbide...
and that applies to cleaning the copper armature also... flint sandpaper and good cleaning afterwards is better... the insulation between the copper segments needs to be undercut slightly ...which can be done by hand with a filed to correct size hack saw blade....and the armature can easily be cleaned by rotating with a drill and holding a strip of that sandpaper around it while revolving... quit as soon as it is shiny...
It is typical standard operating procedure to freshen the armature when replacing the brushes... for longer life...

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