How you inflating your 110psi tires?

[Rob Hentges]

I have a speedaire compressor, but it won’t pump up my tires because they need to be 110psi. The compressor won’t kick in until 90psi, so i can’t get any higher than 90. The compressor won’t trim back on. I’m wondering if I can replace the switch to a higher value?

[Old Scout]

...many compressors are made for air tools that operate at 90 PSI or less pressure...so other than replacing it with one with a higher cut it pressure, many owners just bleed down the compressor below 90 using the edge of the value-stem without depressing the tire value stem...this keeps the compressor running....bit of a trick to master but it can be done.....or buy a new compressor.....

[2 Stroker]

What pressure does it shut off at. Mine stops at 135psi and kicks in at 90psi so when at 90 going up I add my air. I have had no problem adding air if needed to 115psi in the front and 100psi in the rear.
2 stroker

[Rob Hentges]

I guess I could put the compressor closer to me and pull the relief valve to make it keep kicking in.

[01blueox]

Originally Posted by Rob Hentges

I guess I could put the compressor closer to me and pull the relief valve to make it keep kicking in.

That would be a PITA, I bought a Marlin inflator from HF you can press the handle while not on the valve stem and let air out of the compressor till it starts and while the compressor is running I go back on the valve and continue airing the tire up.

[Tha_Rooster]

Originally Posted by Rob Hentges

I have a speedaire compressor, but it won’t pump up my tires because they need to be 110psi. The compressor won’t kick in until 90psi, so i can’t get any higher than 90. The compressor won’t trim back on. I’m wondering if I can replace the switch to a higher value?

Bleed air off let it build up then inflate and repeat.

[Rob Hentges]

Originally Posted by 01blueox

That would be a PITA, I bought a Marlin inflator from HF you can press the handle while not on the valve stem and let air out of the compressor till it starts and while the compressor is running I go back on the valve and continue airing the tire up.

Great suggestion. I’ll give that a try. Thanks.

[FIRE UP]

Rob,
You say you have a "Speedair" compressor, correct? You don't say what model, gallon tank it has, whether or not it's 120v or 240v etc. Speedair is or, has been, a well known brand of air compressors. Been around for a long time. Anywaaaaay, in many cases on residential compressors, there is the *cut-in and cut-out* pressure switch on them. Usually made by SquareD. And, that pressure switch is often adjustable.

Those pressure switches are normally around 2.5" x 2.5" x 2.5" or so and have of course, an air line from the compressor to the bottom side, along with a bleed-off valve for start-up. But, they have normally a small cap-nut that holds a cover on them. Once the cap-nut is removed, the top or cover can be removed. When that's out of the way, you'll see I think, two spring loaded adjustments. Maybe just one, it's been a while since I adjusted mine and others.

But, typically, by turning the adjustment nut in a clockwise direction, you tighten the spring. When it's tightened, that raises the operating pressures of both CUT IN and CUT OUT. In other words, if your compressor used to cut-in at 90 psi, you can raise that to say, 100 psi and, that will raise the cut-out pressure from say, 120 to 130. The actual pressures are dependent on just what your model pressure switch has been set to from the factory.

I re-adjusted mine about 10 years ago to cut out at 145 and cut in at 100. It's been working like that for eons of time and no one's died, the sun and the moon still rise and I still have my first born. Below is a video on how it's done. Maybe yours is like this and, maybe not.
Scott

https://www.youtube.com/watch?v=1VNSv7xVzzU

[Dav L]

Originally Posted by FIRE UP

Rob,
And, that pressure switch is often adjustable.

Let's not forget that one should never adjust the pressure for more than the tank is rated for. Safety first...

[Rob Hentges]

Here are some pics of my compressor. It is 110v. The tank sure does look heavy duty, but there is no rated pressure I can find. In an engineer and I work with compressed gasses at 3300psi to inflate emergency escape slides on airplanes. So I know not to do anything unsafe. The speedaire tank certainly looks very robust.

[Mike8253]

Originally Posted by Rob Hentges

I have a speedaire compressor, but it won’t pump up my tires because they need to be 110psi. The compressor won’t kick in until 90psi, so i can’t get any higher than 90. The compressor won’t trim back on. I’m wondering if I can replace the switch to a higher value?

Not trying to hijack your thread, and I admit upfront I don't know your RV, but I'm curious. The "Tire and Loading Information" sticker in your RV requires 110psi inflation? Just seems high to me. Thanks.

[Gary RVRoamer]

The regulator knob is the adjustment for that pressure switch. 90 psi is the max with the regulator turned full up? If so, I'm guessing that's the max the compressor can produce. What is its rated output psi?


From what I could learn about the Dutchman Royal Classic, the largest tire used was a 225/75R15 in load range D. That would put the max inflation at 65 psi! What tires do you have that could use 110 psi?

[paul65k]

So I have 2 ways to inflate our tires. At home, we have a Husky compressor that has 165PSI and works great in conjunction with our digital inflator. I really like this compressor as it is the new rotary compressor type that is much quieter than previous piston-driven compressors.

On the road, we have one of these installed in our Jeep and it can handle up to 150PSI with a 100% duty cycle. it is more expensive than cheap units but it will also fill a 35" jeep tire in about a minute which is nice if you've been off-roading and need to air back up.

https://www.amazon.com/ARB-CKMTA12-B...VYAZ14Q4GEGHRP

[Rob Hentges]

The tank pressure and outlet pressure goes up to about 120. My tires are currently at about 85psi. So initially air will start to go into the tire, then the tank pressure drops and the tire pressure increases until tank and tire are both at about 95 psi. The compressor then won’t kick back in because it’s not low enough to trip the switch.

Tires are Goodyear G670 RV. See picture showing the cold pressure rating.