My left rear wheel collar on my new to me Wolverine seems to have a little movement with the wheel raised. This is on a low hour/mile machine. Could it be the washer under the dust cap and not the collar itself? Cannot get the nut off the axle yet to inspect, I am soaking it with PB blaster at this time. If I need to replace the wheel collar any good sources? OEM seem to be a little expensive. I do want quality replacement parts....so not sure what to do if it comes to that.