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Old 10-13-2021, 04:51 PM   #1
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Finally added a simple air gauge for air bags

So, since we brought her home, I always hated the fact that the only way to check pressure in the Firestone Air bags was with a tire gauge. These hold so little air, that the act of checking them releases a little pressure each time. After three or four checks, you've got to add air. <Sheesh> I know there are all kinds of kits to do this, including some with dash controls to add air, but I just wanted a simple gauge teed' in. I ran across just what I was looking for, from the motorcycle aftermarket industry. Right side by is done except for some clamps and a grommet where the line passes through the compartment. Easy mod.
https://www.titancustoms.com/diairprgakit.html
Attachment 264366Attachment 264367

I got the 2", but the 1.5" would have fit better in the Junction Box.
I started to flush mount the gauge in the compartment, but went with the box to better protect the gauge.

Cantex4 in. x 4 in. x 2 in. Junction Box
https://www.homedepot.com/p/4-in-x-4...3705/202043434
SKU# 202043434
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Old 10-13-2021, 05:43 PM   #2
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Lightbulb

Very useful.
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Old 10-14-2021, 10:55 AM   #3
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Quote:
Originally Posted by Gidyupgo View Post
So, since we brought her home, I always hated the fact that the only way to check pressure in the Firestone Air bags was with a tire gauge. These hold so little air, that the act of checking them releases a little pressure each time. After three or four checks, you've got to add air. <Sheesh> I know there are all kinds of kits to do this, including some with dash controls to add air, but I just wanted a simple gauge teed' in. I ran across just what I was looking for, from the motorcycle aftermarket industry. Right side by is done except for some clamps and a grommet where the line passes through the compartment. Easy mod.
https://www.titancustoms.com/diairprgakit.html
Attachment 264366Attachment 264367

I got the 2", but the 1.5" would have fit better in the Junction Box.
I started to flush mount the gauge in the compartment, but went with the box to better protect the gauge.

Cantex4 in. x 4 in. x 2 in. Junction Box
https://www.homedepot.com/p/4-in-x-4...3705/202043434
SKU# 202043434
Nice modification.

Maybe its just my phone browser, but what looks like a picture you posted appears as a link attachment which is recursive

Your links to the gauge and junction box work fine.
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Old 10-14-2021, 11:25 AM   #4
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Thanks, but...... when I tried clamping the line against the wall I couldn't keep the minimum radius. So, I ran the line out the back of the box when I did the driver's side and now there are no lines inside the compartment.
I'll rework the passenger side too. Still simple and inexpensive.

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Old 10-14-2021, 01:32 PM   #5
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What size were the air lines on the rv?
Thanks
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Old 10-14-2021, 01:40 PM   #6
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air gauge

Did you do both sides or just one side?
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Old 10-14-2021, 02:01 PM   #7
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What size were the air lines on the rv?

Thanks
1/4 inch
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Old 10-14-2021, 02:03 PM   #8
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Did you do both sides or just one side?
Both. Click image for larger version

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Old 10-14-2021, 02:54 PM   #9
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The air gauge looks very professional, But, to do two airbags, one on each side with HD box costs 72.68 plus tax and maybe some shipping. I add air to my airbags around 3 times during the summer and this project seams is a little pricey to avoid checking and adding air so few times a summer. Just how it strikes me cost wise!
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Old 10-14-2021, 03:38 PM   #10
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The air gauge looks very professional, But, to do two airbags, one on each side with HD box costs 72.68 plus tax and maybe some shipping. I add air to my airbags around 3 times during the summer and this project seams is a little pricey to avoid checking and adding air so few times a summer. Just how it strikes me cost wise!
No problem with your logic Bob. I just like to be able to check the pressure on devices that require specific pressure to perform their function with a glance during pre-trip check.
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Old 10-14-2021, 04:38 PM   #11
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To the OP, good idea and nice work.

This got me thinking. If one already had an aftermarket TPMS system capable of monitoring many tires, could one put a Schrader tee on the air bag fill ports, then put a TPMS sensor on each of them? Airbag pressure could be checked at the dashboard display.
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Old 10-14-2021, 04:56 PM   #12
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To the OP, good idea and nice work.

This got me thinking. If one already had an aftermarket TPMS system capable of monitoring many tires, could one put a Schrader tee on the air bag fill ports, then put a TPMS sensor on each of them? Airbag pressure could be checked at the dashboard display.
I had the same idea using my TST system. I would think it would work as I can do something like 28 tires or more, but only use 6 now. (I already have the Schrader valves as shown in the OP pictures) If I put in 75-80 lbs in those airbags, I would think it should work just the same as on my tires. Of course, I probably get a "low pressure" notice more often on the airbags, but it would just be a reminder to add needed air to the bags.
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Old 10-14-2021, 09:12 PM   #13
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I tried the TPMS sensors.(Tire Minder) It only works if the unit is stationary and not up on jacks. It set off the high and low pressure alerts when in motion.

TM has a “disconnect” feature so I could use them when they were set up as a “trailer”. At the time I tried this my riderite had serious leaks. I had to constantly remove the sensors to fill. If I had flow thru sensors or installed a T it would have been easier.
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Old 10-15-2021, 09:47 AM   #14
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Grommet for compartment walls. You'll make the hole in the back of the box large enough that it goes over the grommet flange or the box won't lay flat against the wall.
Click image for larger version

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Old 12-03-2021, 06:51 AM   #15
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Just as a follow-up. This setup is awesome. The system is tight (no leaks) and I verify the pressure with a quick glance before a travel day. Wish I would have done it sooner.
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Old 12-03-2021, 07:58 AM   #16
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Just as a follow-up. This setup is awesome. The system is tight (no leaks) and I verify the pressure with a quick glance before a travel day. Wish I would have done it sooner.
This is a good thing.
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Old 12-05-2021, 07:26 AM   #17
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The air gauge looks very professional, But, to do two airbags, one on each side with HD box costs 72.68 plus tax and maybe some shipping. I add air to my airbags around 3 times during the summer and this project seams is a little pricey to avoid checking and adding air so few times a summer. Just how it strikes me cost wise!


Wow. You only have to add air 3x per season?

I have to add air 3x per month (both sides)! I thought that was normal, but obviously I need to start finding and fixing some leaks.

One more thing for the motorhome “to do” list.
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