Just spent 90 minutes pulling my non-working blower motor with the help of JSlabotsky great wikki... ( http://www.peachparts.com/Wikka/W124BlowerMotor )The motor will spin at 13v (max fax on CCP) if I give it a little spin on the squirrel cage to get it started, otherwise it does nothing. On low fan setting the motor does not turn at all. After taking the motor from it's mounting bracket I found that rotating the shaft was abit stickey... it will not freely spin. Looks like there is about 3/8" left on the brushes (from what I see without removing them) However, the bearings at either end of the motor are somewhat rusty.

My question: is there something i can do to get the motor free'd up, i.e. lubricating the bearings/shaft or am I looking at replacing the motor/squirrel cages? Winter is nearly apon me... gonna need the heat.

BTW, I have proper voltages coming from CCP all the way up to the motor... checked last week

Any advice would be greatly appreciated.

1991 300E

EADG

Hello EadG,

Sounds like the brushes are making marginal contact - giving you your 'startup' troubles... At least if the things spins, while drawing appropriate amperage, the armature is OK. Couldn't kill ya to lube the bearings, but this is probably not your problem.

For what it's worth - have rebuilt mine myself - quite easy to do. Got some pigtail brushes at Sears - had to do a little grinding to get them to the correct cross-sectional dimensions - again easy. Then, a little soldering of contacts, and it's been working for years now. I'm sure you could find the correct brush stock on line with a little searching.

Lemme know.

Lou

Hello EadG,

Sounds like the brushes are making marginal contact - giving you your 'startup' troubles... At least if the things spins, while drawing appropriate amperage, the armature is OK. Couldn't kill ya to lube the bearings, but this is probably not your problem.

For what it's worth - have rebuilt mine myself - quite easy to do. Got some pigtail brushes at Sears - had to do a little grinding to get them to the correct cross-sectional dimensions - again easy. Then, a little soldering of contacts, and it's been working for years now. I'm sure you could find the correct brush stock on line with a little searching.

Lemme know.

Lou

Just put in a new motor. Then you will have miles of worry free use from this accessary.
I ordered a new blower motor from **************. Cost was $114.70 with free shipping to my door. That was in February of this year.
You will need a hammer and a punch that has a point no wider than the shaft of the blower motor.
Carefully support the cage (still attached to the old blower) between two stacks of books. The blower motor will dangle between the books. Place the punch directly on the shaft carefull not to damage the cage. Swiftly strike the punch a couple of times. The motor will fall free of the cage.
With equal pressure taking great care not to break the cage, press the cage onto the shaft of the new motor.
Ready to reinstall motor w/cage. Good luck

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Thanks for the replies guys.
DrLou, took your advice and replaced both brushes, unfortunatly that did not get the motor spinning on low setting. I soaked the bearings in penatrating oil for a few hours to try and loosen up some of the rust. Tested the blower this morning and its running well on high (12v) and medium speed (when CCP is set to Auto) - just not on low. I can live with that for the time being... with alittle luck I'll find a used one is a scrap yard ths weekend, otherwise a new motor is in order.
CDPlayer; I was wonder just that peticular thing this morning - how to get the old cages off. From what I see on the net the diffrance between motor with/without cages is around $80 I'll give it a shot when it comes time to swap out motors.

Cheers for now.
EADG

Just for practice, before your new motor comes in, and if your cage is in good order, try knocking one of their motors free at the junk yard.
At least it will give you an idea of what to expect. Take a hammer and a punch with you. I found a punch with a flat tip worked best than one with a pointed tip. Remember, a couple of good strikes is all it takes.

__________________


Selling used Mercedes parts on Ebay...always changing...
cdplayer51 take a look!
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