Your latest description does make it sound like you could have some issues related to chains and/or rollers.
You may even have some rollers missing from the sides of the carriage that you don't even know should be there.
And a side shifting carriage is a bit more prone to exaggerate an unbalanced carriage when shifted to extreme left or right.
It may require the eyes of 2 people to accurately determine where all this excessive sloppiness is coming from.
Might even want to have it inspected by a lift truck professional to find out where you stand with needed repairs.
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