Since I also have a 310, I though I would chime in. The A/S manual says for the 31Ft. it's 75psi front and 60pb1 rear. They also give the same numbers for the 28 ft because they both have the same G.V.W.R. I my case I ran the HM across the scales and it's 5300 in front and 8440 in the rear. This was with 80 gallons water and near full gas. They are Bridgestone's 8R19.5 and if you go the inflation guide at
Trucktires.com the numbers come out about the same.
The folks at a very reputable tire shop were I bought then said 100 psi all around, Go figure.
While I'm typing I have a question. Are the MH's placarded by A/S. The VIN says 82 for my chasse but the A/S doc's say '83 for the coach. Could they both be right?
Cheers.....Bill