A quick learner from tucson says:
April 7, 2010
Looking at your wheel replacements without the housing. How would this work. right know we have been grinding off the old wheels and using a screw along with a thing blot to attach the wheel. Home depots replacement wheel kit. So with your wheel and axel would we grind off the wheel like normal and just slip the 81-304 axle in and the sliding glass door frame would hold it all together. Or is there actually a way to lock this into place with the old wheel bracket
Paul Sr. from SWISCO responded:
April 8, 2010
The 81-304 axle is for a replacement in a roller housing assembly. The wheel and axle snap into the original wheel housing. It sounds like you have something different like a wheel sitting directly in the door frame without a housing.