General Electric and Hotpoint machines are single-direction, horizontal-shaft machines. Older machines have a round motor, newer machines have a square-ish motor with an extermal capacitor.
To change from wash mode to drain mode, a solenoid-operated flapper valve closes off the spray arms and opens the drain port.
You usually need to remove the machine from beneath the countertop to remove the pump and motor unit.
If the motor is not starting, it may be stuck. Sometimes the seal just gets a little dried out and sticky. You may be able to free it by hand. Unplug the machine and remove the kickplate. Try turning the motor fan blades by hand with the motor in place.
If you cannot free the motor, replace the seal. In newer machines (with the square motor) the carbon seal is not glued into place, and can come loose and catch the rubber seal. You can glue the carbon seal in place with a little RTV.
The pump on these machines can be rebuilt. Your appliance parts dealer a seal kit available. There is also a rebuilt pump and motor unit generally available; it is a LOT faster and easier just to swap out the pump if you can afford it.
These are pretty straightforward machines to disassemble. Unplug the machine. Have a shallow pan standing by to catch any water left in the pump and disconnect all hoses from the pump. Disconnect the motor leads, the motor mount and the pump suction inlet and discharge.
A macerator is located outside the pump screen. This macerator chops up bits of food and debris before it enters the pump. Two different kinds of macerators were used; a blade-type, and a wire-type. If you have a blade-type, hold the motor fan blades and unscrew the macerator from the impeller. If you have a wire-type, there is no need to remove it yet.
There are tabs molded into the suction port nut for removal. Using the flat side of a file to turn the nut, unscrew the suction port nut from the pump body. If you have a metal suction screen, this will be difficult. Loosen it by grabbing the metal suction screen and yanking it out with a pair of needlenose pliers. This will destroy the screen, but it’s cheap to replace, and it will loosen the nut. Remove the plastic ring and the metal wear ring. Note how they come out for re-installation.
NOTE: The suction port nut has left-hand threads! Turn it clockwise to remove it!
Hold the motor fan blades and unscrew the impeller. Hold the impeller with a pair of pliers (careful not to damage the threads unless you are replacing it) and turn the motor fan blades.
Remove the pump body from the motor and knock out the pump shaft seal from the outside.
Assembly is the opposite of disassembly. Make sure the lip on the metal wear ring points towards the impeller. Don’t forget that the suction valve nut has a left-hand thread; turn counter-clockwise to install.
Feel the action of the flapper valve. If it is sticky or leaking, replace the flapper valve shaft seal.
When you get the pump/motor unit back into place and hooked up, pour a gallon of water into the tub before starting the machine. Do not run the pump dry!!!