I took both wheels off to replace the upper and lower tires. wheels came off easily and to top wheel was replaced just as easily. I have a problem with the lower wheel though. The shaft has a key slot that accepts a half circle key.
I put the wheel just on the shaft and align the keyway on the hub of the wheel with the key and slip it further on the shaft. But then it stops because the key turns in the slot and prevents the wheel from moving any further on the shaft.
This is the first time I have encountered this type of key and I can't figure out how to proceed. I have tried to push the key back level but it won't go. It's very tight down there and dark. even with a light I can't see much.
Does anyone have any tips that will let me put the wheel back on?
Thanks,
Paul