AO Smith Motor Rebuild

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AO Smith motor rebuild USQ1152 1 1/2 hp

Rear of motor taken apart. Clutch switch and amature shaft removed.

Square motor end flange with 8-32 bolt shown. AO smith does not sell these 10.75" long bolts, I used 8-32 threaded rod from home depot $5.

8-32 threaded rod inplace

This seal is located in the front of the motor on the square flange. Its a 5/8" i.d. steel washer with a 5/8" i.d. x 1/16" thick rubber washer inside. I bought the rubber washer from Mcmastercarr for $1

You can pop the old washer out using a screw driver in the flat slot. I used RTV to glue the pieces back in place.

 

Most of the time the 8-32 bolts will break off. Heat with a torch and use a vice-grip to remove or drill and tap to 8-32. These are thru holes so on assembly use anti-seize and RTV to block the thru holes.

Armature shown with new bearings installed. Also shown is the bearing puller. I thought about cutting the bearings off the shaft because they were seized but an automotive tie-rod puller worked fine. NOTE: there are 2 snap rings that hold the front bearing in place so make sure you remove all of the clips before pulling the bearings.

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