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Wiper Motor, Pt. 2

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Webb

Webb

Senior Member
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Alright: I completely unassemblemed the rack and motor mechanism, and cleaned and greased everything thoroughly. Rack is very smooth, no hangups there. The worm and final gears are in good shape, with very little wear on them. All the bushings and washers are present.

I got it all greased up and put back together, but before attaching the rack or connecting rod I put it to power to see what would happen. It started off very slowly as before, went through a cycle, and started to speed up, but it started to make a low pitched squeal once it got up to speed. Problem is definitly in the motor somewhere. The "brushes" looked good...they are actually some sort of block. Connections are good to the brushes, and to the plug on the outside of the motor.

I noticed the armature was extremely hard to turn by hand when I had it out of the con rod casing...definitly not spinning freely. I assume this is why it's not working right. What would be causing this?

*note: I used lithium grease as that's what I had readily at my disposal. I hope this is a suitable grease. Even if it isn't though, I know for sure it's not why this thing is screwed up.
 
Not sure from your other posts if in fact you took the motor apart. The inability to rotate armature implies dry or otherwise binding bushes and or thrust washers in the motor or conditions that would cause the armature contact or drag against the stator housing.

Another cause can be the brushes or brush holders not properly sitting on the rotor.
 
From the sounds of it, it seems like a bushing problem at either (or both) end(s) of the armature shaft. Sorry, I ve been away and missed your other posts. I'll find the previous thread and catch up.
 
Aloha Webb,

I agree with Paul's analysis. The bushing(s) in the motor need to be oiled. I am unfamiliar with the TR6 wiper motor, but if the bushing(s) can be removed and soaked in oil for several hours that the best treatment. If you can't remove them put some oil on the shaft and allow it to run into the bushing. You might need to do this several times. These are rugged motors, so I am confident you can fix it.
 
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