Hotpoint WD640 The belt keeps on coming off and the machine will not empty, it seems the drum sticks after so many spins (without the belt on) What could be the problem?

My experience has been that if the drum does not spin freely, or "sticks", there is either something stuck between the inner and outer tubs, or your rear bearing is going bad. This could also be the cause of your belt coming off. If the drive motor is still turning and the drum suddenly stops, the motor could be pulling the belt off the drive pulley. I have found items like zip ties, bra straps, shoe strings, etc. in between the two tubs, wrapped around the bearing shaft. Unfortunately, there is no easy way to get to it without removing the wash tub and disassembling. If you notice a brownish colored spray pattern inside the casing of the machine then you know your bearing is probably shot. These same stains can also be found on your clothes. The bearing can sometimes leak when it goes bad. Now, the draining issue sounds like something else. There should be an electric drain pump that removes water from the wash tub. Is the drain pump coming on? If so, you may have something clogged in the drain line just prior to the pump. If you can access the inside of the washer, look for the drain pump. First, unplug the washer. The pump is a small electric motor (white, black or gray in color) towards the front of the machine with a drain line going to it from the bottom of the wash tub. Give the drain hose a squeeze. There should not be anything inside the line, except maybe some residual water. In some models there may be a plastic strainer that is used to catch coins and small objects, but nothing else. Wash cloths and underwear are notorious for getting between the two wash tubs and getting stuck in the drain line. If you find something caught in the drain line, suck the water from the wash tub with a wet/dry shop vac, first (if you have one). This will minimize the amount of water that comes out the drain line. Disconnect the drain line and clean out the drain line. If your pump is equipped with a screw on trap, remove it and check for debris as well. You could also have something caught in the trap, restricting the movement of the pump impeller. Now, if the you don't hear the pump running at all the pump may be bad. If you can give me some more info, I may be able to give more guidance. let me know.