FAQ: What should I do if my seat doesn't lock while sliding?

I've just assembled my sliding bench, but the seat will not lock at the ends of the sliding rails. What should I do?

Please check to make sure the bench is assembled correctly. There are two sliding rails (one with 2 brass pins and one with 4 brass pins). The 4-pin sliding rail should be installed on the "front" side of the bench (the direction you want the seat to face in the bathtub) with the 2 small brass pins facing outward and the 2 large brass pins facing downward. The 2 small brass pins help the sliding rings with the red tabs lock into place. The 2-pin sliding rail should be installed on the "back" side of the bench.
See: Product Videos | Assembly Videos
How to Assemble: 55662 (Bariatric Swivel Sliding Transfer Bench) How to Assemble: 72621 / 62625 (Bariatric Shower Chairs)
How to Assemble: 74654/ 74655 (Padded Raised Toilet Seat / Safety Frame / Commode) How to Assemble: 75232 / 75233 / 75231 (Swivel Shower Chairs)
How to Assemble: 77662 (Swivel Sliding Transfer Bench) How to Assemble: 77762 / 77761 (Tub-Mount Swivel Sliding Transfer Bench)
FAQ: What should I do if my seat doesn't lock while sliding? FAQ: Can the bench face in either direction?
FAQ: What should I do if my seat doesn't lock when swiveling? FAQ: How do I install armrests on my transfer bench or shower chair?
FAQ: How do I install the middle legs of a Toilet-to-Tub Transfer Bench? -