Strange Retaining Ring on Motor Shaft - Unable to remove bearing

[stickyboomerang]

Hello--

I am trying to replace a bearing on a pump motor and I cannot figure out how to remove this bearing. There is a weird retaining ring or washer that is roughly the size of the inner race of the bearing and is preventing me from pulling the bearing off (see photos). The ring does not have any features that could be used to remove it so it seems like it might just be a washer. There is a quite a bit of corrosion on the shaft so I was thinking it might just rusted in place. I have been applying naval jelly to try to break it loose but still cannot get it to budge.

Is anyone familiar with this type of bearing retainer? Any ideas or suggestions for removal? I can't use a torch because there is a plastic molded fan on the rotor right behind the bearing and don't want to risk melting it.

Motor info:
Emerson Cat. No. 9352-6107
Model T55MWCFR-1288

 

[DDoug]

Hello--

I am trying to replace a bearing on a pump motor and I cannot figure out how to remove this bearing. There is a weird retaining ring or washer that is roughly the size of the inner race of the bearing and is preventing me from pulling the bearing off (see photos). The ring does not have any features that could be used to remove it so it seems like it might just be a washer. There is a quite a bit of corrosion on the shaft so I was thinking it might just rusted in place. I have been applying naval jelly to try to break it loose but still cannot get it to budge.

Is anyone familiar with this type of bearing retainer? Any ideas or suggestions for removal? I can't use a torch because there is a plastic molded fan on the rotor right behind the bearing and don't want to risk melting it.

Motor info:
Emerson Cat. No. 9352-6107
Model T55MWCFR-1288

How are you trying to remove this ?

 

[morsetaper2]

Can the fan be removed? That seems like the obvious path to removing the bearing. At least from the view of my computer anyway.

 

[stickyboomerang]

How are you trying to remove this ?

3-jaw bearing puller

 

[stickyboomerang]

When the fan is removed, what is on the other side of the bearing?

The fan is behind the bearing toward the motor rotor so it is still on the shaft. It looks like there is a retaining ring on the back side of the bearing

 

[Peter from Holland]

Perhaps it is a sleeve
Shaft is smaller as the ID of the bearing perhaps hence the need of a sleeve
I would put it in the lathe and turn off that piece

Peter

 

[boslab]

Looks a shoulder at the bottom of the radius, means the bearing has to go towards the fan ?
Mark

 

[stickyboomerang]

I'm pretty sure the bearing would be assembled on the shaft from the RH side in this photo. So it seems like it has to come back off this way?

 

[DDoug]

3-jaw bearing puller

I'm thinking that bearing should come off the shaft end, the fan being pushed on first to a shoulder, then the bearing is pushed on last.
The corrosion is pretty bad, I would slice the bearing with a cut-off wheel.

 

[Gearclash]

Time to destroy the bearing. Pop the seal out. Then remove the ball separator. Push the balls all to one side of the race grooves. The outer race should be able to fall toward the inner race where the balls are missing; this will allow the balls to be removed from the groove. Once the balls are out the outer race will come right off. Then the inner race is accessible for heating or grinding. I prefer just to cut the inner race with a cut off wheel, but that may be hard to do here. If there is a retainer there it will be easier to fight with the outer race gone.

 

[DrHook]

Lay a straight edge across the bearing and see if the inner race is truly higher than the outer shell. If not, there is nothing there, according to pics of that bearing on the 'net. As Doug said, cut it apart with a cutoff wheel, or carefully with a plasma or oxy-acetylene torch, if you have the ability. Piece o cake!

 

[sfriedberg]

It wasn't until the photo in post #8 that I realized what "that crap on the shaft" is. It's what's left of the shaft! Looks like over 10% of the diameter of the shaft has corroded/eroded away.
Let me ask what you intend to do if you get the bearing off. You probably will not be able to remove/replace the shaft from the motor rotor. (Did this thing sit underwater for years or something?) Are you planning to metalize the shaft and turn it back to size again? That seems like a massive amount to build up by metal spray, and I can't imagine brazing or welding on material is going to make the rotor very happy (or the shaft very straight).

 

[4GSR]

Looks almost like some of the swimming pool pumps I've rebuilt or scrapped out over the years. Now have throwaway pumps from China.

 

[eKretz]

Yeah I'm not seeing any retaining ring. That's the inner race. Crusty AF.

 

[MrWhoopee]

It wasn't until the photo in post #8 that I realized what "that crap on the shaft" is. It's what's left of the shaft! Looks like over 10% of the diameter of the shaft has corroded/eroded away.

^^^^This^^^^^

What was on the end and how loose was it?

This is looking like a complete shaft replacement, if that is even possible.

 

[guythatbrews]

Yeah looks like my hot tub pump shaft. Impeller screws on the end. My guess the seal failed and corroded the shaft. A lot. The impeller has a long hub on it that covers the shaft but water can still get in and f things up.

I turned down the corroded part and sleeved it with a piece of SS. It's been running that way for years.

Pissed me off at the time they used plain carbon steel for the shaft. But I guess they saved a dollar or two.

Time to destroy the bearing. Pop the seal out. Then remove the ball separator. Push the balls all to one side of the race grooves. The outer race should be able to fall toward the inner race where the balls are missing; this will allow the balls to be removed from the groove. Once the balls are out the outer race will come right off. Then the inner race is accessible for heating or grinding. I prefer just to cut the inner race with a cut off wheel, but that may be hard to do here. If there is a retainer there it will be easier to fight with the outer race gone.

Good idea. Do this. Once you get the outer race off you can just flat grind the inner race all the way through with an angle grinder. If you hit the fan or the shaft a bit it will still work.

 

[GregSY]

I don't see any retaining ring...just the inner race. I was expecting to see a 'wedding band' type of retainer, as used often on automotive axle bearings. But that isn't one.

As others have said, whatever that rotor is from, it needs to be lowered into the scrap bin. It looks far too cruddy and far too small to warrant fixing.

 

[stickyboomerang]

I was able to get the bearing off using the method Gearclash described.

This is from a hot tub jet pump. Seal failed and the shaft corroded just like guythatbrews guessed.'

Thanks everyone for the input!

 

[dalmatiangirl61]

I was able to get the bearing off using the method Gearclash described.

This is from a hot tub jet pump. Seal failed and the shaft corroded just like guythatbrews guessed.'

Thanks everyone for the input!

Sending you a PM

 

[4GSR]

Sending you a PM

No! You can't go use his hot tub after he fixes it....