Hi, I have a pump that was replaced years ago that I kept so I could take it apart and see why it failed. No biggy just wanted to see what was inside these things but I can't see how it comes apart. I got the motor off but I can't get into it either. There were four little screws on the outside of the casing but they didn't seem to release any thing. Didn't seen any set screws on the shaft or anything. Any idea how to get into this thing?

Dempster pump, 2hp, #HB200

Misc. info
Failed after ten years about ten years ago.
well depth 750 feet
pump set at 500 and something

Pumps out sand and mud sometimes. I figure that's what killed it.