Air Hiss?

Topic: Air Hiss? (Read 975 times) previous topic - next topic

Air Hiss?

February 16, 2022, 12:42:35 pm

We've been boondocking at Imperial Dam for the last two weeks and arrived in Quartzsite yesterday. Started the coach up this morning and there is a very noticeable hiss coming from the front. The air brake pressure is fine, brakes work fine, but this hiss is still there. Attached a pic of where the sound is coming from. Can anyone help us figure out what this is, please?

Re: Air Hiss?

Reply #1 – February 16, 2022, 12:47:17 pm

Pressure regulator that controls air pressure to front air bags. Usually limits to 60 psi +/-. You can find a replacement at any hardware or big box store that sells air tools etc. Its an easy repair.

jk

Re: Air Hiss?

Reply #2 – February 16, 2022, 01:13:25 pm

Thank you! I just want to be sure. The piece I've circled is specifically where the hiss is coming from. Is this the regulator?

Re: Air Hiss?

Reply #3 – February 16, 2022, 01:23:36 pm

Quote from: stowers6 – February 16, 2022, 01:13:25 pm

Thank you! I just want to be sure. The piece I've circled is specifically where the hiss is coming from. Is this the regulator?

The black valve you circled is part of the regulator. When you buy a new regulator everything between the two airlines will come as one unit. Set it to 70 psi when you get the new one. Don't mess with that stuff without blocking the coach first. RV Lifestyle Inc in Q will have that part:

RV Lifestyles Inc
(928) 927-8222
Google Maps

Re: Air Hiss?

Reply #4 – February 16, 2022, 01:24:50 pm

Quote from: stowers6 – February 16, 2022, 01:13:25 pm

Is this the regulator?

Yes - the whole thing is the regulator (body + dial + black plastic adjustment knob).

Re: Air Hiss?

Reply #5 – February 16, 2022, 04:21:48 pm

Ok, thanks again! We did go to RV Lifestyles and they no longer carry the part. We'll try Napa Auto parts or Ace Hardware in Parker, AZ.

Re: Air Hiss?

Reply #6 – February 16, 2022, 04:49:22 pm

Rodney, I replaced all of mine with this one style from Lowes. Easy fix, and has been working well.
https://www.lowes.com/pd/Kobalt-Mini-Air-Regulator/50126536

Home Depot carries the same style too.

As others have said, make sure you use safety stands when under the coach,

Re: Air Hiss?

Reply #7 – February 16, 2022, 05:47:50 pm

Ok, thanks. I've never spent real time under the coach. Which safety stands should I get and where do you place them under the coach?

Re: Air Hiss?

Reply #8 – February 16, 2022, 06:03:14 pm

Quote from: stowers6 – February 16, 2022, 05:47:50 pm

Which safety stands should I get and where do you place them under the coach?

You need 8 stands to hold up both ends of the coach.

Safety Stand Placement

https://www.harborfreight.com/class-iii-12-in-x-2-in-standard-receiver-tube-69879.html

Working Safely around your Foretravel

Re: Air Hiss?

Reply #9 – February 16, 2022, 06:15:32 pm

Use the HWH leveling pad to raise the coach to its highest level and then place each one near each air bag.

Re: Air Hiss?

Reply #10 – February 16, 2022, 07:43:21 pm

REGARDING INSTALLING THE "LIFT" PIPES, IS ANYONE GOING TO TELL HIM ABOUT THE FRAME DIMPLES THAT INDICCATE WHERE THEY GO? I FORGOT.....

Re: Air Hiss?

Reply #11 – February 16, 2022, 07:53:16 pm

Quote from: Jon Twork – February 16, 2022, 07:43:21 pm

REGARDING INSTALLING THE "LIFT" PIPES, IS ANYONE GOING TO TELL HIM ABOUT THE FRAME DIMPLES THAT INDICCATE WHERE THEY GO? I FORGOT.....

I guess you need to remind us (or at least me) about this dimples. I've never knowingly used them. Pictures please!

Re: Air Hiss?

Reply #12 – February 17, 2022, 12:30:28 am

Guess your talking about stop pads. I never reach in that far. I just place inside of the airbags and centered on structure.

Re: Air Hiss?

Reply #13 – February 17, 2022, 08:17:52 am

Quote from: dsd – February 17, 2022, 12:30:28 am

I just place inside of the airbags and centered on structure.

X2

IMO the safety stand should be a "stand-in" for the air bag.

Right next to the bag makes sense. Way inboard on the little metal ring does not make sense. To me. But, as always, DWMYH

Re: Air Hiss?

Reply #14 – February 17, 2022, 08:34:53 am

Quote from: Chuck & Jeannie – February 17, 2022, 08:17:52 am

IMO the safety stand should be a "stand-in" for the air bag.

Right next to the bag makes sense. Way inboard on the little metal ring does not make sense. To me. But, as always, DWMYH

I always place mine exactly as yours is shown in your photo.

Re: Air Hiss?

Reply #15 – February 17, 2022, 10:17:26 am

I suggest you raise your coach up fully and measure the distance between frames while the bags are fully inflated. You may need to have your stands cut down to 11" before they'll fit. Everyone's coach seems to be a little different.

Re: Air Hiss?

Reply #16 – February 17, 2022, 10:59:21 am

Quote from: Elliott – February 17, 2022, 10:17:26 am

I suggest you raise your coach up fully and measure the distance between frames while the bags are fully inflated. You may need to have your stands cut down to 11" before they'll fit. Everyone's coach seems to be a little different.

I like ours raised as high as possible and so I left the stands at their original length. I need to have Carolyn inside holding the button to raise one side at a time to the maximum height but (at least for us) the full-length stands will just fit.

Re: Air Hiss?

Reply #17 – February 17, 2022, 12:08:57 pm

Where are you in "Q" we are at Salome,if need be could possibly come and help you.

Re: Air Hiss?

Reply #18 – February 17, 2022, 03:08:18 pm

I found two of those stands here in the coach but need to pick up more. Also, I didn't find the air pressure regulator part yet. Will go into Parker or Blythe to get it today or tomorrow. There is a big Napa in Parker - I need to call them to find out if they have it.

We are staying at La Posa North in Q. Some help would be wonderful! Also, we haven't met any other Foretravel owners IRL.

Re: Air Hiss?

Reply #19 – February 17, 2022, 07:20:30 pm

You would probably be able to find at Home Depot or Lowes and probably cheaper than Napa.

Re: Air Hiss?

Reply #20 – February 17, 2022, 08:09:35 pm

Might that regulator be the same on our 1993 U300? If so, maybe I ought to get one and then when it eventually warms up I can change it out one line at a time so I can't screw it up. The coach is in the storage lot for the winter, and I would assume it is pretty much all the way down. I think I could get under there without too much trouble.... Hmmm, maybe Jo Ann ought to be along just in case she has to drag me out.

Re: Air Hiss?

Reply #21 – February 17, 2022, 08:19:31 pm

Might that regulator be the same on our 1993 U300?

Its the same on our U300....

Hans

Re: Air Hiss?

Reply #22 – February 18, 2022, 04:52:17 am

Your in flea market city,check them for the regulator and metal for more blocks,Lake Havasue has a Harbor frieght.

Re: Air Hiss?

Reply #23 – February 18, 2022, 12:34:42 pm

Quote from: stowers6 – February 17, 2022, 03:08:18 pm

I found two of those stands here in the coach but need to pick up more. Also, I didn't find the air pressure regulator part yet. Will go into Parker or Blythe to get it today or tomorrow. There is a big Napa in Parker - I need to call them to find out if they have it.

We are staying at La Posa North in Q. Some help would be wonderful! Also, we haven't met any other Foretravel owners IRL.

If you still need help, JR at OFF THE GRID RVs is 1 mile north of town on 95. He full times in his Foretravel on site.

Re: Air Hiss?

Reply #24 – February 18, 2022, 01:16:07 pm

Ok, great! Thanks for all of the info y'all. I looked all over Q for the part and no one has it. Had to go to Napa in Blythe to get it. I'm looking up how to install it now and just may look for JR for some help.

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