Hi,
They are very easy to change. I would replace both the pump and drive belt at the same time.
Just tip the washer back and take a look at the bottom.
There are your two belts. You just roll them on the pulleys.
The motor is spring loaded and will self adjust the belts.
The motor pulley will be the double pulley you see both belts go to in the front left corner of the washer. | 
Changing the drive belt on maytag model#A506 
