Forum Discussion

Ryan7361's avatar
Ryan7361
Explorer
Aug 20, 2015

2 air ports near front drivers side tire?

Curious about two air valves near my front drivers tire, I know the lower one is for my driver side air bag. (The passenger side has its own valve) What could the upper one be for?
-the hose goes straight through the floor and disappears under the drivers area carpet.
The label only says 90 psi
It is a 1987 Establishment on a P30 chassis

I tried to attached a photo-but don't know how!!
Class A
  • mike_brez's avatar
    mike_brez
    Explorer
    Aug 22, 2015
    My old P30 had them under the hood. It's for adjusting the pressure in the air bags inside the front coil springs. Some good P30 info HERE
  • TANDDANDBIGE's avatar
    TANDDANDBIGE
    Explorer
    Aug 22, 2015
    I have an air port tied into the coach air brake system to add air in an emergency so you can move the beast. And also..... a separate air port to use for inflating tires, toys etc.. Both are in a compartment just forward of the drivers side wheel.
  • RayChez's avatar
    RayChez
    Explorer
    Aug 22, 2015
    They are probably for the Firestone weight assist lifts. I had them on a gasoline coach on the rear. They helped on the rear to lift the rear end up. I used 90 lbs of air on each one.

    Do they look like schrader valves on tires?
  • jyrostng's avatar
    jyrostng
    Explorer
    Aug 21, 2015
    It COULD also be a water pressure tank fill valve to maintain a stable water flow at the faucets and shower. if it is, it should be set to around 25 psi. It should be matched to your pumps pressure to be absolutely correct.
  • Terryallan's avatar
    Terryallan
    Explorer II
    Aug 21, 2015
    Could it be a purge air? To let the water out of the compressor? Open the valve to let the air blow out the water.
  • wolfe10's avatar
    wolfe10
    Explorer
    Aug 21, 2015
    Can you trace them-- where do they go. If to the front air bags, should be visible when looking from the ground at the front bumper.
  • wolfe10's avatar
    wolfe10
    Explorer
    Aug 20, 2015
    Hopefully the two front air bags (OE equipment) are not tied together. So, perhaps one is for left, one for right air bag.

    If tied together, on a corner, the outer bag will not support the weight-- it will just allow the air to go to the inner corner's bag. Heel may be OK for a dog, but not for a motorhome.

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