https://imgur.com/a/8X8tkUQ

You all may or may not be able to help, I don't know where else to post this.

I have a commercial floor cleaner that uses a blower motor to vacuum up water after scrubbing the floor. The motor died last month - unfortunately I don't know why - and I replaced it with an identical one. The cleaner is 25 years old so we just assumed it died from old age. Since then the motor trips the internal blower circuit after 15-20 minutes of use.

The lines are clear where it pulls a vacuum, the metal housing feels warm around the motor but it's a pain to pull the housing away just to check the motor temperature, if you think that's necessary I will. The breaker will not immediately reset, it takes 5-10 minutes before it will reset.

Any thoughts at all?