Water Pump Motor Rebuilt!!
So aside from cleaning up the motor, the biggest pain in the patootie is to remove that rear bearing. Unfortunately, it took two different external bearing pullers and some McGuyver'ing on my part, but I made it happen -
So there isn't a lot of room between the end of the bearing and the commutator so I needed to use a small 2-jaw bearing puller that I had to file down the jaws on a bit so that could get enough of a grip under the bearing to pull. Once I got the bearing pulled up enough, I switched over to the 3-jaw chuck but then promptly ran into a problem ....
The diameter of the bearing puller thrust shaft is around 5/16" while the inner race of the bearing is a skootch less than 6mm. The thrust shaft is tapered on the end to a point but the taper isn't long enough to fully extract the bearing .... NUTS!! So I was left in this situation -
Here's the McGuyver'ish part - I looked around my various jars of nuts, bolts and other assorted items and found some set metric set screws. There were a bunch but I eventually found some M6 set screws of various lengths -
So I dropped that set screw into the bearing race, out the three jaw puller on it, wore my safety googles in case the set screw decided to fly at me, and VIOLÀ -
Putting on the new bearing was super simple as my vise has an 8" opening and I could simply line up the new bearing on the cleaned shaft and use the vise like an arbor press. Worked like a charm and the new bearing went smoothly onto the shaft end -
The new bearing rotates super smoothly. I did a final clean up of the motor assembly, packed the front and back bearing slots with lots of grease and closed the motor back up again -
Next job - machine down the carbon brushes, set them in their tracks and then clean off the circuit board and reassemble the motor box. Fun times.
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