Hums then blows breaker

11 months 1 week ago - 11 months 1 week ago #3350 by Maverick1
Hums then blows breaker was created by Maverick1
15 gallon 200 psi Mastercraft air compressor. Plug it in..fine but once you hit the on switch the motor hums or buzzes then blows breaker after about 5-8 seconds.Shaft still turns freely.Both start and run capacitors are working.The spring inside the check valve was broke so I'm trying to order one but will this solve the humming and tripping breaker?I've tried plugging into different outlets same result.Help please.

Please Log in or Create an account to join the conversation.

11 months 1 week ago #3353 by MTR-Admin
Replied by MTR-Admin on topic Hums then blows breaker
Do you have a model number so we can look at a breakdown?

Please Log in or Create an account to join the conversation.

11 months 1 week ago - 11 months 1 week ago #3355 by Maverick1
Replied by Maverick1 on topic Hums then blows breaker
Model #058-9317-8
120V 15amp.one person has told me they think the bushings are shot so the motor wont spin

Please Log in or Create an account to join the conversation.

11 months 1 week ago #3356 by MTR-Admin
Replied by MTR-Admin on topic Hums then blows breaker
The best guess is a bad check valve.
To test, perform this test below:
mastertoolrepair.com/howto-test-check-valve-p-22524.html

Please Log in or Create an account to join the conversation.

11 months 1 week ago - 11 months 1 week ago #3358 by Maverick1
Replied by Maverick1 on topic Hums then blows breaker
How can i do that if i cant turn the compressor on to put air in the tank to perform the test?there was air trapped in the check valve when i first unscrewed it.would a bad check valve cause this compressor to blow the breaker after turning on?

Please Log in or Create an account to join the conversation.

11 months 1 week ago #3360 by MTR-Admin
Replied by MTR-Admin on topic Hums then blows breaker
Yes, it would cause the breaker to blow.
Drain the tank of all air. Can you still not turn the pump by hand?

Please Log in or Create an account to join the conversation.

Moderators: MTR-Admin
Time to create page: 0.104 seconds