Motor Brush size for later 124 blower motor? - PeachParts Mercedes-Benz Forum

Maxbumpo · #1 10-08-2018, 05:14 PM

The HVAC blower motor in my '95 sedan has died. The car has the air intake filters for the HVAC, so the blower motor is different than earlier 124 cars with no HVAC filters.

When this motor died on my '87 wagon, I was able to get just the motor (a new Bosch motor) with no fan blades for about $80. I can't seem to find the same motor sans fan blades for this car, so I think I'm going to try replacing the brushes.

Anyone know the brush dimensions, or have a spare motor?

97 SL320 · #2 10-08-2018, 09:27 PM

On other motors I've fixed and can't get exact size, I get brushes that are close with proper pigtail and sand to fit.

Maxbumpo · #3 10-08-2018, 10:16 PM

That's a good idea. I think they are 8mm x 10mm, maybe I'll order a set that size and another set that's bigger.

Zulfiqar · #4 10-09-2018, 03:38 PM

The motor is same as older models, the only difference on them is that there are two wires soldered to the motor terminals rather than just spade lugs.

You can fit an older model motor, or you can rebrush it as long as the end bearings are good.

TX76513 · #5 10-09-2018, 03:59 PM

Amazon has a good selection of brushes. Have fixed some XYZ electric motors just by measuring what left of the old brush - speculating the length and as SL320 wrote adjust the length as necessary. Made a Harbor Freight electric buffer live well beyond what anyone would imagine.

optimusprime · #6 10-11-2018, 05:59 AM

97sl knows the way to go, i had to do the same on my alternator regulator ,

Maxbumpo · #7 10-11-2018, 04:39 PM

Quote:

Originally Posted by Zulfiqar

The motor is same as older models, the only difference on them is that there are two wires soldered to the motor terminals rather than just spade lugs.

You can fit an older model motor, or you can rebrush it as long as the end bearings are good.

That is good news! Have you fit an older-style motor with the newer-style fan blades and installed it / operated it with no issues?

Zulfiqar · #8 10-12-2018, 12:18 PM

Quote:

Originally Posted by Maxbumpo

That is good news! Have you fit an older-style motor with the newer-style fan blades and installed it / operated it with no issues?

I bought a motor for a 300E, The motor physically was the same but cannot wire due to the smaller fan wheels, unsolder the wires from your old motor and solder them to the new one in the same spot, bend the spade lugs so they dont mess with the fan wheel. Install the motor and make sure to clamp the wiring in the spring clip.

The fan wheels are a bit fussy to remove as they are very delicate.

p.s. you need a very hot solder iron to make this work because the wires are pretty thick. (I use my propane pen solder tip)

Maxbumpo · #9 10-13-2018, 07:27 AM

Zulfiqar, thanks, I'll go that route.