I have had a Westin pro for a few years and the seal bar has stopped raising to complete the seal. Anyone know how the pistons actually work and what could be wrong? I have replaced the small pump that actuated the pistons and the pistons themselves, As well as the seal bar and it is still not working properly. It costs a lot of money to send back for service so I was trying to u stray and the process to see if I could Troy Leah lot and fix
Myself.
