I've been working on a problem with the blower motor in my '89 260 E (it usually
doesn't run at all,
but will run on increasingly rare occasions). I've replaced the electronic
control unit, but it also
looks to me like the carbon brushes on the motor are pretty much gone. The
springs are extended and
the wire on both brushes is nearly at the end of the brush housing. So, my main
question is how does
one go about this? There is no obvious way to detach or open the brush housings.
I also see no
obvious way to remove the fans from the motor shaft without breaking them. I
really want to avoid
spending another $250 on this problem!
My second question concerns the blower motor housing cover. It looks like
someone tried to seal the
housing cover by squirting silicone sealant into the groove. I don't see any
mention of using a
sealant in the tech manual. Is there any reason to do this?
Bring it to a electric motor repair shop and let them advise you... you
should be able to get the motor far cheaper than you found... try Autozone
or online auto parts such as bmaautoparts.com
As far as the sealant... I believe the previous owner wants to seal it tight
or they lost a screw/stripped the thread that prevents tight seal.
Thanks, Tiger. Unfortunately, there are no electric motor repair shops nearby
(closest is about 1/2
hour away, and was unwilling to look at it without charging a fee). I looked
around quite a bit for
a replacement, but was unable to find a new motor assembly (incl. fans) for less
than $230. I did
see a new motor without fans for $130, though. Anyway, I ended up buying a used
one from Potomac
German for $90--and now have a new problem, because they sent the wrong part and
I only have two
more days to fiddle with this before the car has to be on the road--not enough
time for an exchange,
even through Fed Ex. In short, I specified that it had to be from a system
without the dust filter,
and the guy I ordered from said, "I don't think it makes a difference." Well,
the motor itself is
probably compatible in that it has the same dimensions, but the fans are the
wrong size for the
housing--too small diameter, and too close together. Is there a way to remove
them so I can put the
old fans on the newer motor? I am very worried about breaking them and ending up
unreturnable part and no working car. (I also really don't want to have to put
the whole thing
together again just to take it all apart again in another week).
And once the proud owner of a secondhand
1977 300D, 1979 240D, 1982 300D, & 1985 380SE
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