In order to find the correct Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box for a Jayco Seismic Wave 310W you'll need to determine the pin box pattern. This can be done by reaching out to the trailer frame manufacturer, Lippert, with the serial number off the side of the pin box brackets. The most common is a Lippert 1621 and in which case you'll need part # GY58GR.
If you have a different pin box pattern please let me know what that is and I'd be glad to see if we have an option. view full answer...
While we don't offer just the plate that holds the leg in place we do offer replacement legs. In order to replace the middle leg, you'll want to measure the length of the outer tube on the jack leg to determine which leg will be the appropriate replacement. If your left middle leg measures 17" long then you will need part # LC342610, but if it measures 19" long then you will need to use part # LC305339. view full answer...
I reached out to my contact at Lippert and they were able to confirm that you have a Lippert 1621HD pin box therefore the correct Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box is part # GY58GR. view full answer...
The Fan-Tastic roof vent cover part # DMC38FR that you referenced is perfectly compatible with the MaxxFan roof vent you have installed on your 2020 Jayco Seismic 5th wheel. This cover was designed for replacing standard roof vents like what you have. view full answer...