Air Hose Connection

Topic: Air Hose Connection (Read 1321 times) previous topic - next topic

Air Hose Connection

September 05, 2014, 05:21:55 pm

I am still discovering and learning things about Ducky. I started looking around for the air hose connection and could not find one. The gas tank/LP bay has a quick connect fitting next to the LP tank. I am hoping this is the air hose connection, especially with the air hose coiled up on the shelf above the tank. Just wanted to make sure I was not trying to plug into an LP outlet.

(Guess you can tell from the question, that I have not had any experience with LP in my first 70 years.)

Would SKS please confirm that this is where to plug in the air hose?

Thanks,

Trent

Re: Air Hose Connection

Reply #1 – September 05, 2014, 05:25:14 pm

Yea, that's where it was on our 320. Looks like an identical setup.
jor

Re: Air Hose Connection

Reply #2 – September 05, 2014, 05:26:10 pm

Hi Trent,
That is the air line connection. It will give you air pressure to the limit of your engines air compressor.
Raymond

Re: Air Hose Connection

Reply #3 – September 06, 2014, 01:01:37 am

Quote from: Raymond Jordan – September 05, 2014, 05:26:10 pm

Hi Trent,
That is the air line connection. It will give you air pressure to the limit of your engines air compressor.
Raymond

...which is usually just short of the pressure you want for your front tires.

Re: Air Hose Connection

Reply #4 – September 06, 2014, 01:34:06 am

Trent you probably have figured this out already but this is what I encounter. The air compressor with your engine may not be a good match to what you need if you need more than 95 or so psi.

Example. I need 110 psi. The max I can get out of the on engine compressor is 120, but as soon as I pull the tanks down just a little, I quickly have no reserve in the tank at that psi so the tire has more psi than the air tank and I cannot air it up. So I have to bleed off air to about 90 psi at which point the governor kicks the compressor back on, and when it is pressuring up in the 110 - 120 psi range I can again put air into the tire, for a moment.

If you want help on how to improve that scenario, send me a pm and we can talk about a gadget that will help. Or you can search and find where many of us have discussed this on the forum.

Mike

Re: Air Hose Connection

Reply #5 – September 06, 2014, 07:59:07 am

It is an issue to air up the fronts but the old wrangler was easy when we went to the beach.

Re: Air Hose Connection

Reply #6 – September 06, 2014, 02:53:24 pm

I've been using the on-board air for my tires. Since the air pressure is 120psi only when the air pump stops and then drops with use to 90psi, I let air out to recycle the pump when trying to get the most air into my front tires. I can go as high as 115psi this way, which is all they need.

Re: Air Hose Connection

Reply #7 – September 06, 2014, 03:16:23 pm

Where and with what are you guys measuring the pressure at the air hose connection? Is there a meter or gauge that displays that information? I did not see one near the air hose connection.

Thanks,

Trent

Re: Air Hose Connection

Reply #8 – September 06, 2014, 03:27:42 pm

Initially, I just used the two gauges on the dash. Later on, I added a small gauge to the hose end, just before the quick disconnect fitting. The one I bought at Harbor Freight is part of small regulator assembly, but I just uses it for the gauge. It always reads exactly the same as the ones on the dash.

Although it tops out at 120psi, I have not been able to get more than 115psi into the tires this way. Which is fine.

Re: Air Hose Connection

Reply #9 – September 06, 2014, 04:10:33 pm

Or build a gauge with a pressure release. I borrowed this useful idea:

Airing up the tires with coach air

Re: Air Hose Connection

Reply #10 – September 06, 2014, 04:30:24 pm

I had our D2 replaced earlier this year and kept the old one. Just now I followed the links to the diagram of the "guts" of the D2. I decided to experiment with the old one. For those who haven't yet played with it, the cap unscrews. If it has been on there for some time you might have to help it a bit with a pliers. Then it is an easy matter to loosen the nut, turn the screw, tighten the nut and replace the cap. I say "easy matter" when the D2 is loose from the engine - it may not be so easy when you are standing on your head trying to see through the wrong part of the trifocals, but at least the theory is simple.

Re: Air Hose Connection

Reply #11 – September 06, 2014, 08:37:06 pm

Replaced my D2 and high is 130 and low is 110.

MUCH BETTER BRAKES AT THE HIGHER PRESSURE

Re: Air Hose Connection

Reply #12 – September 06, 2014, 11:10:00 pm

Quote from: Caflashbob – September 06, 2014, 08:37:06 pm

Replaced my D2 and high is 130 and low is 110.

Bob, that sounds like a significant increase and may eliminate the difficulty some have reported about airing their tires sufficiently.

Now if you or SOKS will tell me what D2 is, I can improve my system too.

Thanks,

Trent

Re: Air Hose Connection

Reply #13 – September 06, 2014, 11:17:59 pm

Bob, is it ok to use the other D2? Seems I recall admonition to not do that? If so, I do not recall why not?

Mike

Re: Air Hose Connection

Reply #14 – September 07, 2014, 12:29:47 am

Quote from: Michael & Jackie – September 06, 2014, 11:17:59 pm

Bob, is it ok to use the other D2? Seems I recall admonition to not do that? If so, I do not recall why not?
Mike

Mike,
The very first service that I had done by Cummins in NH (in 1998), the service manager recommended that I change to the 110/130 D2. 16 years later, I've had zero problems and I've never seen a convincing reason to use the lower range D2.
FOR WHAT IT'S WORTH
Neal

Re: Air Hose Connection

Reply #15 – September 07, 2014, 01:45:30 am

Just like they say, to get the engine compressor to build more pressure, you have to remove air filler chuck and bleed off air tank to governor set point. But one quick way to bleed is to use an air filler with a trigger and an open chuck that continues to let air our when removed from tire valve. Most air chucks will close when removed from tire.

Re: Air Hose Connection

Reply #16 – September 07, 2014, 08:04:32 am

Quote from: TulsaTrent – September 06, 2014, 11:10:00 pm

Bob, that sounds like a significant increase and may eliminate the difficulty some have reported about airing their tires sufficiently.

Now if you or SOKS will tell me what D2 is, I can improve my system too.

Thanks,

Trent

See http://www.bendixvrc.com/itemDisplay.asp?documentID=5644

here is a page from the Bendix Catalogue

Re: Air Hose Connection

Reply #17 – September 07, 2014, 09:42:45 am

We run 85-90 psi in tires and so have no problems. Nine years with this Foretravel and on the second set of tires. Lots easier that changing the D2. We don't carry that much stuff anymore.

Re: Air Hose Connection

Reply #18 – September 07, 2014, 09:54:05 am

I made up a tire inflator similar to Peter's: Airing up the tires with coach air
I bought all the components from the blue big box store. Attached a couple of pics.
Dave A

Re: Air Hose Connection

Reply #19 – September 07, 2014, 10:42:13 am

I used the 15 lb Power Tank for tire rescue while suffering from pressure pro design issues, today the air chuck in the RF compartment is to provide air to raise the coach with out starting the engine. I use shop compressor if wondering.

Re: Air Hose Connection

Reply #20 – September 07, 2014, 11:08:32 am

Elliott,

Thanks for the catalog page and the link.

Trent

Re: Air Hose Connection

Reply #21 – September 07, 2014, 11:12:56 am

Same as Dave, air in to raise the coach. I use an in-line air dryer.

I wish the aux air outlet was powered by the 12v compressor for filling bike tires and other stuff. After a several days, tank pressure is not enough. I suppose I could add a air connection into the 12v air plumbing.

I bought my tire inflater for about $12 at Amazon Clip on chuck, gauge shows supply pressure or tire pressure, has a deflater button. Accurate and easy.

Re: Air Hose Connection

Reply #22 – September 07, 2014, 11:45:55 am

Quote from: Neal Pillsbury – September 07, 2014, 12:29:47 am

Mike,
The very first service that I had done by Cummins in NH (in 1998), the service manager recommended that I change to the 110/130 D2. 16 years later, I've had zero problems and I've never seen a convincing reason to use the lower range D2.
FOR WHAT IT'S WORTH
Neal

On their own the llocal cummins dealer installed the 110-130 D2 as the 90-110 was sticking.

I did not know of the two different ratings till I read it here.

Re: Air Hose Connection

Reply #23 – September 07, 2014, 11:49:22 am

Quote from: lgshoup – September 07, 2014, 09:42:45 am

We run 85-90 psi in tires and so have no problems. Nine years with this Foretravel and on the second set of tires. Lots easier that changing the D2. We don't carry that much stuff anymore.

I had my coach weighed and calculated out the correct pressure on our 40' u320

Full fuel, water its 98/108.

Yours seems low? Steers better absolutely correct on tire pressure. Plus or minus 2 pounds are noticeable.

Re: Air Hose Connection

Reply #24 – September 07, 2014, 12:08:47 pm

When I bought my spare D2 governors at Freightliner, the choice I was offered was between adjustable and fixed. I didn't know any better to ask about different ranges available. t am not sure why there would be a need for two "ranges", as the adjustable can be, well, adjusted...

The adjustment can raise or lower the 20 psi cut in/cut out range, so I wonder why there might be an advantage to getting one with a higher (or lower for that matter) preset range.
Don

Quote from: Caflashbob – September 07, 2014, 11:45:55 am

On their own the llocal cummins dealer installed the 110-130 D2 as the 90-110 was sticking.

I did not know of the two different ratings till I read it here.

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