Given the description of your problems, combined with the age and lack of information available for your landing gear your best bet is going to be to replace the landing gear.
To determine the correct replacement landing gear for your 5th wheel trailer, you will need to measure the mounting brackets on your trailer from the underside of the top bracket to the top of the lower bracket as shown in the diagram. From there you will be able to choose the amount of lift and weight capacity... view full answer...
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