electrical and ignition Heater blower motor

[Driv3r]

I'm currently refurbishing the heater box. Noticed one of the brush holders is melted. It looks like the PO never used the heater (we rarely use heater in Australia) or the box came from junk yard. The motor was completely seized. 

 

 

I've managed to clean the whole motor with special spray used in cleaning computer motherboard. I fabricated a brush holder out of heat resistant plastic and soldered the carbon back to the disconnected wire. After cleaning I was able to turn the shaft with no problem. Hooked it all up and it worked in low rpm then slowly picked up to maximum rpm (I guess it found the right spot with brushes). I've been testing it since and it works with no problem. But, something at the back of my head says, "Ok, you won, it works fine, now go buy a new fu*kn motor!". I'm worried if this thing stop working in 6 months and then I have to go through the whole hassle of pulling the heater box out.

 

I found a genuine Bosh 0130007081 (used in Porsch) for $75 shipped. My questions:

 

Is that a fair price?

Has anyone used this motor? I have the rubber sleeve so I can use it if needed.

Is the shaft diameter same? So I can use my old fan?

How do you remove the urethane bushing so that you can get the fan out? (trying not to force it, in case I damage the fan)

 

I appreciate any input. Cheers

 

['76mintgrün'02]

Unfortunately, I do not have answers to your questions, but would just like to say nice work fixing the original; as well as that is a cool photo.  I like the way they used male and female connectors, to keep us from getting the wires crossed.  One of these days I will refurbish my heater box, but aside from leaky flaps and a stuck defroster flap, it is working fine.

 

Could you post a pic of your repair and the cleaned up motor?

 

I did a search for [Bosch 0130007081] and found these (maybe you have already read them).

Tom

[pklym]

I had the worst time trying to remove the fan from the old motor and get it properly mounted and balanced on a new motor. I ended up buying a new full assembly even though it was an extra $170 or so

 

good luck

[Driv3r]

4 hours ago, pklym said:

I had the worst time trying to remove the fan from the old motor and get it properly mounted and balanced on a new motor. I ended up buying a new full assembly even though it was an extra $170 or so

 

good luck

 

That's what I'm afraid of. When I tried to remove the urethane bushing, I notice a lot of pressure on fan core. If that thing have a slight bend, you will need a new fan because it will eventually start to vibrate and make noise.

 

 

['76mintgrün'02]

What if you put it in the oven and got it nice and warm?

Not hot.

Plastics tend to get softer with heat.

Perhaps it would slide off easier that way?

Could you make a little wooden pickle fork to pry it off?  (or aluminum, or plastic...)

If you cut a backer for the shaft, (which was slightly narrower than it is), then you would not be putting the side load into the bushings as you tap the fork in.  Know what I mean?

[Mike Self]

The trick on getting the fan off your old motor without ruining it...presuming your old motor is toast and you don't plan to refurbish it, as it involves a hacksaw.

 

1.  Clamp the motor in a vise so it's nice and steady

2.  Take your hacksaw and saw through the armature between the inner edge of the fan and the motor frame, after marking the fan so you install it on your new motor facing in the same direction, and measure the distance from the inner edge of the hub to the edge of the motor housing.  This is critical to keep the fan from hitting the heater box.

3.  Take an appropriately-sized socket, rest the fan hub on the rim of the socket, and drive the stub armature out of the fan hub with a hammer and drift. 

4.  Lubricate the fan hub, then using another appropriately sized socket, gently and carefully drive the fan hub onto the new motor's armature, making sure to position it in the same location as it was on the old motor.

 

You're done.

 

mike

 

PS---keep the remains of the motor for spares--the armature may be toast but the rest of the motor may have usable parts. 

 

[chargin]

I am using the Porsche replacement with 100% success

As seen here:

 

 

 

[Driv3r]

16 hours ago, '76Mintgrun'02 said:

Could you post a pic of your repair and the cleaned up motor?

 

 

 

 

This motor works fine now but wires get extremely hot during operation. Not sure if that's due to bad brushes or its just how it is. Nevertheless, I've decided to buy a new motor but with anti clockwise turn. The Porsch 0130007081 seems to be clockwise turn.

 

[Driv3r]

13 minutes ago, chargin said:

I am using the Porsche replacement with 100% success

 

Thanks, is it counter clockwise?

Also, did you use the plastic sleeve? And finally, how did you remove the nylon lock?

 

Cheers

Edited September 4, 2016 by Driv3r

[chargin]

33 minutes ago, Driv3r said:

This motor works fine now but wires get extremely hot during operation. Not sure if that's due to bad brushes or its just how it is. Nevertheless, I've decided to buy a new motor but with anti clockwise turn. The Porsch 0130007081 seems to be clockwise turn.

 

You could just try reversing the the wires to spin the motor backwards

 

 

[chargin]

It's been awhile but I think the nylon sleeve clipped together, so I just found the seem and opened it for reuse 

 

everyone said it spun backwards but once I put it all together and tested it, it spun correctly 

 

most likely your wires are getting Hot because of overloaded stress, the replacement motor never has this issue