how to check/set new class c tire pressures

The biggest issue I dealt with was the rear wheel simulators. I had to contact the factory to determine whether or not they were screwed on. They weren't, they're hub caps. Removing the rear wheel simulators provided improved access to the valves. I visited a "Pilot" store and purchased a truck type straight on dual foot tire pressure gauge and air chuck. Maximum air pressure on my tires is 80 lbs, so I purchased a 110 lbs air compressor at "Wally World". Now that I've obtained the correct tools and have become familiar with the valve locations, checking the rear tire pressures is fairly straightforward. I haven't decided whether to pull the the wheel covers monthly or just leave them off.

I inquired about valve extensions with my dealer and they declined to install any due to liability issues. At some point in the future I'll probably visit a truck tire dealer to get the metal valve extensions installed.

I was at a tire shop (Alban Tire in Springfield VA) having the Tireman valve stems installed. The tire pressure at the end was not what I had asked for on two tires. I mentioned it to the foreman who said there were two guys working on my RV. He will have them check their gauges. I asked how. They had a oil filled gauge to check against. After airing up all six to the spec requested he checked my gauge to make sure it was accurate to the pressures I wanted. I mention this because it cost nothing to ask. (My gauge was dead on).
John

Is there only one valve stem for each of the dual tire assemblies or are there 4 valve stems on the rear.


Sorry, this was already answered above. There's an inner and an outer valve on each of the dual rear wheels.

Once again, thank you all for your feedback.

Your tires are probably load range E, they have a maximum pressure of 80 psi, so when buying a compressor, make sure it will turn on above 80 psi when recycling. Even if your tires are load range D, many people replace their tires with load range E when it comes time. You also probably should buy an oil free compressor so it can be used for blowing out your water lines if you winterize where you live.

I have to agree with Bordercollie.
The best and easiest way to check your tire pressure is to install longer valve stems,STAY AWAY FROM THE SCREW ON TYPES,THEY ARE NOTHING BUT TROUBLE.
The best ones on the market are from THE TIREMAN with them you get 6 valve stems where as on the borg ones you only get 4.They are pricey but they are the best and the origanal ones.
For ease and acuracy in inflating and checking the tire pressures I would suggest the
Milton Dual Head Tire Gauge

One of the best and most accurate ones on the market,Most tire shops use Milton products.

If you have trouble checking and adding air with beauty discs in place, consider spending some more money and having long custom formed solid brass or steel valve stems installed on rear duals and front tires if needed. This will cost between $100 and $200 at a Truck Tire shop, but it makes the process much easier.There are two main products. These are available from Tire Man and Borg to fit your rig. Do not install cheap screw-on extenders to the rubber valve stems. They are unreliable and the vibration will cause the rubber stem parts to fracture and leak. Keeping tires inflated properly requires periodic checking of pressure. Leakage and deflation can cause tires to blow out or come apart and steel belts can damage underside tanks, wiring and propane lines or cause loss of control.
Why RV chassis makers don't install these on all new RV's is a mystery to us all.

http://www.ridgecrest.ca.us/~tire-man/valve_old.html

http://www.borgtiresupply.com/owner/duallyvalve.pdf

First off, go to a local truck stop and ask for a truckers tire gage. They are not cheap, but with care will last you a lifetime. While your there, get on their scales and get 4 corner weights. Once home, download from the tire manufacturers web site the inflation chart for the exact model of tires on your MH. Compare the scaled weights to the chart and write down the weight numbers that your tires should have. Then armed with this information go out and measure the tire pressures. Adjust as necessary. Or for a much simpler method, simply inflate each tire to the maximum number listed on the tires sidewall and go camping.
As for a suitable compressor? Pick one that has around 125/150 PSI rating. Preferable one for 120VAC and a 5 gallon tank. Besides pressure ratings, you need one with as high of CFM as you can find.

Start with a good "DUAL FOOT" tire gauge. The straight part should allow you to check front and inner duals, the "cut back" part, the outer dual.

But, check your wheel covers to make sure this design will work on your specific application.