Improper maintenance will cause periodical breakdown of the machines causing avoidable expenses. Some of the consumers are under the impression that warranty conditions attached to the machines will take care of the expenses in case of breakdowns. But they forget the fact that they can invoke the warranty conditions only for inherent manufacturing defects and not for defects caused by improper handling and maintenance of the machines. In many cases manufacturers find that the problems caused to the machines are not due to any deficiency on their parts, but due to sheer negligence of the users. Ultimately consumers will have to pay for the repairs or replacements of the parts in the machines, causing avoidable expenses.
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.