Preventing drive wheel flat spots
Flat spots on drive wheels with external motors can make machines growl and be jumpy and even will not let the hand wheel spin. On this New Home with a Westinghouse motor I took some pics.
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The constant push can squish rubber into flat spots while it is stored.
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This is the motor axle showing the detents where the set screw will hold a new drive wheel.
[ATTACH=CONFIG]596498[/ATTACH] One leg of a clothes pin( by the name plate) will hold the motor away from the body and relieve the pressure. Now you should get longer life.