Can't air up my motorhome tires with my compressors.

by Daniel
(Port Orchard, WA)

I have 2 (nominally) 125 PSI air compressors. One is a 5 gallon, 2 hot dog variety and the other is an upright 12 gallon style. Both work great at running my air tools and airing up car/motorcycle/ATV tires. But neither one will air up my motorhome (bus) tires that take 100 PSI for the rears and 115 PSI for the fronts. What's the problem?

_______________________
Bill says...

Since you've tried it with both compressors Daniel, and that means two air lines, then either the tire gauge adapter you used for both air lines isn't working, or the tire valve isn't working.

If you take the tire fill valve off the line, and put on a blow gun, and depress the trigger, does air come out the blow gun?

If so, then you have air at the tire valve, so the problem is either the tire fill adapter or the valve on the tire itself.

If you don't have air coming out of the air line when you trigger your blow gun, then, what is your regulator setting on the discharge line from the tank?

If the regulator setting is below the pressure already in the tires, air will not flow, except out of the tire.

Cheers,

Bill




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Can't air up my motorhome tires with my compressors.

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Jul 29, 2010
 Oh! So much Pressure!
by: RVDigitalBoy

I would like to suggest another possible reason for not being able to add air to the RV tires.

I discovered that when filling my tires on my gas Class A to 115 psi, my tankless compressor would take a long, long time to add even a lb of additional air.

Perhaps patience is what is needed here.

On my diesel coach, the tires are bigger and require a lower pressure. These 22.5 inch tires take air faster.

Just a thought.

Lew Mann
Webmaster & "Doer of Many Things"
J.D. Sanders RV Center
Alachua, Florida
www.sandersrvs.com

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