I have a Monarch MJC-50 shallow well jet pump (1/2 hp) and I want to tear the pump portion down to clean, inspect, and rebuild as it isn't delivering the pressure it used to (and I have ruled out all other causes).

I am unable to get the pump housing/casing to come apart from the motor, and I am reluctant to use more force.

The manual doesn't help, as it simply says "remove casing" :) I am basically stuck on the 2nd part of step 5. Do I just need to use more force?

enter image description here

Here is the diagram of the pump. I can't seem to get piece #1 away from the motor portion.

MJC-50 Pump


I figured it out.

It turns out that part 16 (gasket) and 17 (cast-iron seal plate) (which to me, looked like part of the casing (part 1) came apart to allow the casing to slide off. I didn't realize they were separate from the casing as they were flush with it and painted the same blue color all over. The two pieces popped apart fairly effortlessly at the gasket.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.