You don't need to disassemble it to replace the pump; just tilt on its side and work from underneath on most models. If you want to disassemble it, pop off the plastic corner protectors on the sides of the control panel. Remove the two screws holding the control panel to the top of the washer cabinet. Unplug wire harness connector and water-control plastic tubing to flip control panel out of the way. Locate two large metal clamps that hold back panel to cabinet body and remove. Remove two screws at bottom of cabinet body. You now have access inside the cabinet. You may need to to disconnect other wire harnesses to fully remove the back panel from the cabinet.
Jim Dandy, December 2008