Why Do The King Pin Plate Pivot Bolts On The Rota-Flex Pin Box Keep Coming Loose

Published 10/03/2023

Question:

I have a 2022 keystone avalanche with the lippert roto flex pin box. The two bolts that hold the cushion keep coming loose. I keep re tightening the bolts to 90-100 ft lbs. Any suggestions

asked by: Ken L

Expert Reply:

The Trailair Rota-Flex 5th Wheel Pin Box # LC328330 has a steel sleeve inside of it that those two bolts thread into. If the bolts keep coming loose then the sleeve is damaged and moving around inside the box. Since there isn't a way to access and repair this the only option is a complete replacement of the pin box. With how new your trailer is you should have a warranty to replace it so it's not out of pocket.

expert reply by: Kevin C