Engine and tire procon pump keeps breaking

[Lbow25]

I just replaced the procon pump for the engine and tire. Not sure how old it was (purchased wash less than year ago). The brand new procon pump’s spindle broke after just 3 weeks of use. 4 bay self serve wash. See pics
What could be causing this?

 

[MEP001]

My first guess would be that you didn't have the pump seated all the way onto the motor.

 

[Lbow25]

My first guess would be that you didn't have the pump seated all the way onto the motor.

The original pump went bad because internal pieces had broken into pieces so I think it is something else causing them to break

 

[Zal]

Check motor bearings. I had a cat pump give out early and motor bearings were shot. Just spin the shaft and check for noise without pump.

 

[toddmullens]

Are you using a 1/3 hp pump on a 1/2hp motor? never mind it appears that you are not...