Mobility scooters - Just like any type of mechanical device, your Invacare wheelchair, using its moving parts (as well as in some battery, cases and motor), must have all parts working smoothly to ensure that it to operate correctly. Proper wheelchair maintenance is an important part of keeping a wheelchair in peak condition, and it is something that ought to be performed frequently. Still, you will have times when, despite proper maintenance, replacement of a few of your Invacare wheelchair parts will be necessary.