Post by coldspaces on Jul 29, 2014 2:49:48 GMT
Decided last week to try to get this 2 phase motor apart without tearing it all up. Started out good till I tried to remove the stator. First I made a band to clamp around the bearing cover. Drilled a hole in it for the oil tube to go through. By putting the band on tight I was able to start one side loose by hitting the flanges the bolt goes through with a hammer.
I then flipped the band over to drive from the other side and it came off with very little damage.
Any newer unit bearing motors I have dissembled had an E-clip on the end of the shaft. Here a washer is on the end of the shaft permanent.
Made another larger band for the front. The front came off much easier than the back.
The windings look great for their age. The paper insulators and lead in wires not so good. Replacing the lead in wire on one of these will be next to impossible without damaging the other insulators. They break easy.
Ground the washer loose so I could get the rotor out.
The shaft is pretty rough. Has at least .006 missing to its hi spots. Looks like it was run dry a little too long.
And here is were I made my big mistake. I should have realized that these rivets only held the stator laminates together. For some reason I was thinking they also held it in the housing. I made a mistake and drilled them off with out damaging the windings. Then I tried to carefully drive the stator out with a punch through the hole for the lead in wires. Well with the rivets loose the laminates separated too much and bent. Pretty sure this one is done now. Guess I know what not to do if I try it again sometime.
I then flipped the band over to drive from the other side and it came off with very little damage.
Any newer unit bearing motors I have dissembled had an E-clip on the end of the shaft. Here a washer is on the end of the shaft permanent.
Made another larger band for the front. The front came off much easier than the back.
The windings look great for their age. The paper insulators and lead in wires not so good. Replacing the lead in wire on one of these will be next to impossible without damaging the other insulators. They break easy.
Ground the washer loose so I could get the rotor out.
The shaft is pretty rough. Has at least .006 missing to its hi spots. Looks like it was run dry a little too long.
And here is were I made my big mistake. I should have realized that these rivets only held the stator laminates together. For some reason I was thinking they also held it in the housing. I made a mistake and drilled them off with out damaging the windings. Then I tried to carefully drive the stator out with a punch through the hole for the lead in wires. Well with the rivets loose the laminates separated too much and bent. Pretty sure this one is done now. Guess I know what not to do if I try it again sometime.
