filthy beast wrote:
I do the same, check before hitching in the morning. Mine did say somewhere that you are not supposed to change or increase pressure while hitched. It has made a big difference in the ride.
Note sure where you got the information from that you can not change pressure while hitched.
I check mine after hitching as trying to check air pressure almost always allows too much air to escape and due to the very small air volume and high pressure it requires adding air after the check.
I have not had a problem with air loss and the check after hitching most of the time indicates I am good to go.
This is a quote from the instructions for a fifth Airborne.
ADJUSTING THE AIR SPRING
1. Perform the hitching procedure following the proper hitching procedure according to the manual for your fifth wheel
Hitch.
2. Add air to the air spring at the valve shown in figure 31. Continue adding air until the skid plate is level (on level ground) see
figure 31. (Use the Inspection Notch on lower jaw of the pin box and line up with bottom side of body.)