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Old 06-30-2014, 10:14 PM
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Blower motor Squealing

On it's maiden trip around the block tonight, the blower motor on our hi mileage '00 Laredo was putting out a hi pitched squeal. Thankfully it's only 3 small screws to remove it. When holding it sideways, it runs quiet as a mouse, installed in it's verticle position, it has the light squeal. Can these things be taken apart enough to lubricate them, or am I stuck buying another fan motor?
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Mike S
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Old 07-01-2014, 10:19 AM
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Re: Blower motor Squealing

You could try some WD 40 or alike.
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Old 07-01-2014, 12:19 PM
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Re: Blower motor Squealing

I think I'll tear into it tonight. I've got nothing to lose. If I have to destroy it to get it apart, I'll pick up one from the junkyard.
Mike Sal
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Old 07-01-2014, 12:20 PM
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Re: Blower motor Squealing

BTW....WD40 is only a temporary lubricant. It's good to free something up, but don't depend on it for a long term lube.
Mike Sal
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Old 07-01-2014, 08:27 PM
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Re: Blower motor Squealing

Was pleasantly suprised to find that the motor is able to be taken apart & repaired. If I can figure out how to post photos, I'll show how it's done.

Photo 1, take the spring clamp off the fan. set the motor on the floor & hold the flanges with your feet while pulling with both hands (one on each side of squirrel cage) & the fan will come of the shaft.

Photo 1a, (forgot to take a pic, so bear with me), use 2 small screw drivers & slip one down along the side of the electrical terminal blade while using the other screw driver to push the terminal slightly back out of the connector area (don't push it all the way, as there's not enough room for the wires).

The motor is a snug fit into the plastic housing. use a large screw driver in the vent slots to help start prying the motor out. Once it has moved an inch or so (25mm), you can wrestle it the rest of the way out by hand.

Photo 2, Clamp the motor in a vice & use a chisel to "un-stake" the 4 tabs of the brush plate from the motor body (8 places). Then turn the motor side ways in the vice & use the chisel to gently "pop" the plate loose out of the body.
Attached Images
File Type: jpg Fan Rework 1.jpg (42.6 KB, 3 views)
File Type: jpg Fan Rework 1 a.jpg (52.0 KB, 3 views)
File Type: jpg Fan Rework 2.jpg (45.8 KB, 4 views)
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Old 07-01-2014, 08:44 PM
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Re: Blower motor Squealing

Ok, goofed up some of the photos vs the descriptions.....

This section will show the chisel work to open the stakes holding the brush plate to the motor body.

The magnets in this motor are strong, so grab the shaft & give it a firm pull to get the armature & brush plate to come out of the body.

In my case the bushings & shaft were not scratched up, so I greased them up & stuck it back together. The brushes seemed to have plenty of life left.

Use your chisel to re-stake the plate to the body.

Be carefull to align the motor to the plastic housing when you push it back together, as the 2 phillips head screws (forgot to mention them in the first post) wont go in if the 2 are not matched up. As you push the motor in, also push in the 2 electrical terminal blades. Use that small screw driver to "click" them back into place.

Re-install in the vehicle & you should be good to go.
Mike Sal
Attached Images
File Type: jpg IMG_0127.jpg (521.9 KB, 3 views)
File Type: jpg IMG_0129.jpg (512.9 KB, 3 views)
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