5 HP Black Max pumps up to 60# and then motor seizes up

I need the diaphram in the On/Off pressure switch on a Black Bull- 4 Gal., 2 HP, 5.0 cfm @ 90 PSI 120 v /13.8 amp . Batch # 0911. These are the only # I can find

Should only be two wires out of the pump. Three if you count ground. If you have two blacks and a white, Hot and Hot go to the black, Ground or Neutral goes to the white. If more wires, please respond.

honey it seems as thou your compressor has lived its life and is just tired

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It could be the pump is bound up or the bearings seized but it is more likely the motor is failing. It may be a small part such as the capacitor or the starting switch, but could also be more severe such as the winding itself. You will also want to examine the shaft where it passes thru the pump and motor and look for signs of rust from a pump seal leak.

If you are not familiar with testing these parts your best bet would be a local electric motor repair shop to see if the motor can be repaired or if it would need to be replaced. They should also be able to ensure there is no pump damage. If you wish to continue to try to repair it yourself please comment with any questions you have as you work thru the pump and motor.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

John

the water has damaged the bearings, it's only a matter of time before the bearings get louder or seize all together. You can have the bearings replaced or get a new motor installed. A bearing replacement is 2/3 the cost of a new motor and the rest of the components are still old and perhaps damaged from the flood. Your call, I'd go for a new motor.

Something is binding in the pump try the impeller to see if it runs true when you have it apart. It may be cross threaded on the shaft. This is a common problem if you have a air leak in your system.

I would replace that and the high heat limit control, it deffinitly got to hot.

The horsepower should be listed on the nameplate (left) of the pump motor (in very tiny letters - hp). If the motor nameplate is burnt or worn off, sometimes a part number of the impeller (right) can tell us which hp your pump motor is.