You have to unlock the three locking tabs on the bottom of the pump, unscrew the check valve from the pump and push the whole pump & motor assembly up from the under the dishwasher inside.
Thanks for the reply. Do the 3 locking tabs on the bottom of the pump hold the assembly to the diswasher? Should the seal be tight? Mine isn’t budging at all. Where do I find the locking tabs?
The locking tabs are shown on the diagram as #26. They are holding the pump to the tub. You have to turn them in order to unlock. You have to push the pump & motor assembly up very hard because the pump seal, aka a motor gasket (#16), is stuck to the tub.