Once you know what part you need you can then go ahead and buy it. This need not be difficult if you have a computer and Internet connection. There are many spare parts stores online; all you need is the name and model number of the part to order it and it will usually arrive on the doorstep within a few days.
Next to your refrigerator, your washing machine is perhaps the most important appliance in your home in terms of comfort, convenience, and utility. However, considering how frequently you use your washer on a weekly basis, it's crucial that you know how to handle a washing machine repair should the need for one ever arise.