Airing tires from onboard hose.

Topic: Airing tires from onboard hose. (Read 3531 times) previous topic - next topic

Airing tires from onboard hose.

March 09, 2018, 03:38:22 pm

I've never done it, but when I go to air the tires, can I leave the coach plugged in when running the engine for air, no problems with the batteries? Here's the new gauge with a fresh coupler. A suggestion from a forum member!

Power Tank - - Powertank.com

Re: Airing tires from onboard hose.

Reply #1 – March 09, 2018, 03:50:29 pm

Sure. I gotta say, however, that airing up coach tires from the onboard system is a pain. I used to carry a little air compressor which makes the job a lot easier. If you haven't already done so, I would recommend you crank up your D-2 air governor to 130 psi or so. Nice air hose setup btw.
jor

Re: Airing tires from onboard hose.

Reply #2 – March 09, 2018, 03:51:14 pm

Quote from: mike leary – March 09, 2018, 03:38:22 pm

I've never done it, but when I go to air the tires, can I leave the coach plugged in when running the engine for air, no problems with the batteries? Here's the new gauge with a fresh coupler. A suggestion from a forum member! Power Tank - - Powertank.com

Yes you can, but if the tires are not really low wait until you are ready to leave so you can run the engine up to operating temp. after you leave.

Re: Airing tires from onboard hose.

Reply #3 – March 09, 2018, 04:04:43 pm

Quote from: jor – March 09, 2018, 03:50:29 pm

I would recommend you crank up your D-2 air governor to 130 psi

With the new Michelins and having the coach four corner weighed, Michelin says I only need 85 front/80 rear. We'll see!

Re: Airing tires from onboard hose.

Reply #4 – March 09, 2018, 04:49:52 pm

Quote

Michelin says I only need 85 front/80 rear.

Uh, oh... Mike. Prepare yourself. I sense a barrage of tire pressure comments coming your way. This topic is second only to dumping procedures in bringing out the passion.

I've gone back and forth on this. On this rig (only 26K loaded) I too am going just a bit over the Michelin tire chart recommendation with 80 and 80. (275/80R-22.5, load range G)
jor

Re: Airing tires from onboard hose.

Reply #5 – March 09, 2018, 05:15:19 pm

Quote from: jor – March 09, 2018, 04:49:52 pm

Uh, oh... Mike. Prepare yourself. I sense a barrage of tire pressure comments coming your way.

Bring 'um on, John! The tires are not stock: Michelin 255/80R/22.5, a little fatter than original. In 50% traveling mode (water, fuel, propane. grey and black water) she weighs out at 8,600 front and 15,000 stern. Rides and steers perfect! If Michelin was wrong, I'd like to know!

Re: Airing tires from onboard hose.

Reply #6 – March 09, 2018, 06:03:35 pm

https://m.youtube.com/watch?v=n5fK54DKWP0

Re: Airing tires from onboard hose.

Reply #7 – March 09, 2018, 06:46:03 pm

Pretty interesting, thanks, Mike. I agree with the air pollution and noise, I'm very carefull about that. I'm an "analog guy" I like gauges rather than readout systems. The unit I have can be used as a pressure gauge without air induction, very accurate, which is why I know she needs air, we've been sitting at the pier since November and psi loss is normal. I'm caught between a rock and a hard place as I need air but don't want to run the CAT without a load. It's dry as all get out down here, and I don't know if it will affect the engine by running it as I air-up without putting a load on.

Re: Airing tires from onboard hose.

Reply #8 – March 09, 2018, 07:55:24 pm

We ordered a Viair portable compressor (Viair 40047 400P-RV Automatic Portable Compressor Kit), from Amazon. Had been using the onboard air compressor, which took forever to air up all 6 tires... with the engine running... annoying me and probably those around me.

Had a neighbor at an RV park who used the pump on his - swore by it and aired them quickly. Simply attach it to your cars battery, start the car and start airing your tires. The car is a lot quieter, which neighbors will appreciate. I was really impressed on how quickly I could air the tires - fronts @115#, rears @ 105# (running Toyos H's)- probably took a third of the time to air 'em all.

That's a lot of air.

Re: Airing tires from onboard hose.

Reply #9 – March 09, 2018, 08:02:27 pm

I always use my onboard compressor and run the engine at high idle so it airs up faster. I have been told it is better to use the onboard compressor because it goes through the air dryer, thus only dry air goes in the tires. I have seen some shops have air dryers on their compressors, but does the Viair or other compressor?? If not, would it be a good idea to put a dryer on?

Inquiring minds would like to know.

Re: Airing tires from onboard hose.

Reply #10 – March 09, 2018, 08:09:55 pm

Quote from: Ted & Karen – March 09, 2018, 08:02:27 pm

I always use my onboard compressor and run the engine at high idle so it airs up faster. I have been told it is better to use the onboard compressor because it goes through the air dryer, thus only dry air goes in the tires. I have seen some shops have air dryers on their compressors, but does the Viair or other compressor?? If not, would it be a good idea to put a dryer on?

Inquiring minds would like to know.

Not to my knowledge, no. But seeing as how I've always aired my car & truck tires up without an air dryer, not sure how important that would be. We full-time so the coach doesn't stay stationary for long...

Maybe I should stay out west and only fill up there...?

Re: Airing tires from onboard hose.

Reply #11 – March 09, 2018, 08:12:22 pm

Quote from: Ted & Karen – March 09, 2018, 08:02:27 pm

I always use my onboard compressor and run the engine at high idle so it airs up faster. I have been told it is better to use the onboard compressor because it goes through the air dryer, thus only dry air goes in the tires. I have seen some shops have air dryers on their compressors, but does the Viair or other compressor?? If not, would it be a good idea to put a dryer on?

Inquiring minds would like to know.

You opened up Pandora's Box.
My personal experience of working as a heavy equipment mechanic for the Operating Engineers and as a truck driver for 40 years has never seen an issue with moisture in tires causing a problem. I have read on the Forum about someone posting about rust in the steel belts. I have never seen any steel belts on the inside of any of my tires. Driving my crane I have to jump curbs and run over parking lot concrete stops and still no inside damage.
As the saying goes your mileage may vary.

Re: Airing tires from onboard hose.

Reply #12 – March 09, 2018, 10:05:35 pm

Quote from: mike leary – March 09, 2018, 03:38:22 pm

I've never done it, but when I go to air the tires, can I leave the coach plugged in when running the engine for air, no problems with the batteries? Here's the new gauge with a fresh coupler. A suggestion from a forum member! Power Tank - - Powertank.com

Mike,

Do you have the "reversed" valve extensions on your outside dual wheels? If you don't, you should get one of the "straight in/straight out" air chucks. See the photo below. The one you want is the bottom one - makes filling the outside tires much easier.

Re: Airing tires from onboard hose.

Reply #13 – March 10, 2018, 06:58:50 am

Also filling the tire is easier if you hit the brakes a few times to get the air compressor to kick in the use fast idle. I filled my Jeep tires all the time that way and needed that to top off my coach tires on my 270 and my 36 foot 320. The 42 foot took too much pressure up front so I carried a small electric compressor.

Re: Airing tires from onboard hose.

Reply #14 – March 10, 2018, 09:17:05 am

Just to inflate passion on this discussion (see what I did there?), you can always fill your tires with Nitrogen. Those in the know claim that tires do not leak down (as the rubber compounds are more resistant to Nitrogen) as fast as plain old air ad since the gas goes through some super-duper dryer theres no worry about interior corrosion.
Or, are they just full of hot air?

Re: Airing tires from onboard hose.

Reply #15 – March 10, 2018, 09:21:40 am

Quote from: Moby – March 10, 2018, 09:17:05 am

Just to inflate passion on this discussion (see what I did there?), you can always fill your tires with Nitrogen. Those in the know claim that tires do not leak down (as the rubber compounds are more resistant to Nitrogen) as fast as plain old air ad since the gas goes through some super-duper dryer theres no worry about interior corrosion.
Or, are they just full of hot air?

Biggest advantage is the pressure stability when heated, that is why nascar uses it. After all the air is 78 % nitrogen to begin with.

Re: Airing tires from onboard hose.

Reply #16 – March 10, 2018, 09:40:02 am

Our Kia Sorento supposedly came from the dealer with (extra cost dealer added accessory) nitrogen in the tires. I mean, how can you really tell if it's "genuine" nitrogen? Anyway, the dealer said I needed to ALWAYS bring the car back to the dealership to get the tire pressure adjusted, or else risk losing the "pure nitrogen" advantages. I asked what advantages? He gave me a pretty glossy booklet from the PurigeN98 company, which apparently supplies the dealer with the (money making) tire filling system. I said "Are you going to reimburse me the cost of gasoline to make the 40 mile round trip to your shop to get my tires topped off?". You know the answer to that.

But I did get some really cool BLUE valve caps out of the deal!

PurigeN98 High-Purity Nitrogen Tire Inflation

Re: Airing tires from onboard hose.

Reply #17 – March 10, 2018, 09:45:45 am

Quote from: John S – March 10, 2018, 06:58:50 am

Also filling the tire is easier if you hit the brakes a few times to get the air compressor to kick in the use fast idle. I filled my Jeep tires all the time that way and needed that to top off my coach tires on my 270 and my 36 foot 320. The 42 foot took too much pressure up front so I carried a small electric compressor.

That's what's nice about the video I posted. You can do it outside your rv.

Re: Airing tires from onboard hose.

Reply #18 – March 10, 2018, 10:05:03 am

I have an inline oil/water separater that I use when adding air to the tires or the level system. Works quite well.
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Re: Airing tires from onboard hose.

Reply #19 – March 10, 2018, 10:16:17 am

Quote from: Chuck & Jeannie – March 10, 2018, 09:40:02 am

But I did get some really cool BLUE valve caps out of the deal!

PurigeN98 High-Purity Nitrogen Tire Inflation

OOOHHHH! BLUE!!!!!
The only way you can tell for sure is to check for the decal stuck on the inside of every tire thats nitrogen filled. Its' a certificate stating that they used 100% official Nitrogen.

Re: Airing tires from onboard hose.

Reply #20 – March 10, 2018, 10:44:41 am

Quote from: Chuck & Jeannie – March 09, 2018, 10:05:35 pm

Do you have the "reversed" valve extensions on your outside dual wheels?

Yes, the unit I have works fine, tight quarters, tho

Re: Airing tires from onboard hose.

Reply #21 – March 10, 2018, 11:06:27 am

Quote from: Moby – March 10, 2018, 10:16:17 am

OOOHHHH! BLUE!!!!!
The only way you can tell for sure is to check for the decal stuck on the inside of every tire thats nitrogen filled. Its' a certificate stating that they used 100% official Nitrogen.

Good one Moby, I think I will stay with the 78% N that's been through my dryer.

Re: Airing tires from onboard hose.

Reply #22 – March 10, 2018, 11:07:50 am

To make airing the outside duals much easier I like to have a tire shop replace the valve with a shorter one and turned so that it is not pointed toward the inside. That way it is easily accessible.

Re: Airing tires from onboard hose.

Reply #23 – March 10, 2018, 11:11:05 am

Quote from: folivier – March 10, 2018, 11:07:50 am

To make airing the outside duals much easier I like to have a tire shop replace the valve with a shorter one and turned so that it is not pointed toward the inside. That way it is easily accessible.

Concur! Also makes it easier to install tire pressure monitor sensors. Will get our valves done that way when we get fresh tires (soon).

Re: Airing tires from onboard hose.

Reply #24 – March 10, 2018, 11:12:40 am

I thought green caps were for nitrogen or just easier to see.
I got 100 of them for $2.99
Easier to find when I drop them in the dirt

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