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Old 10-23-2017, 09:53 AM   #1
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Tapping into the compressed air system

Has anyone ever tapped into their Class A on-board compressed air brake system to have air to fill the tires?

Rob
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Old 10-23-2017, 09:59 AM   #2
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Some chassis have a built-in air fitting to allow connection for tire inflation. There is also usually a connection for tow trucks to connect the RV to the tow truck's system for airing up during towing. That connection often has a check valve that prevents air leaking out.
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Old 10-23-2017, 10:00 AM   #3
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I believe most chassis have a factory tap used for airing up the suspension and brakes in the event of the RV needing to be towed. This is usually a quick connect which can accept and air hose. The location will vary depending upon manufacturer.
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Old 10-23-2017, 10:03 AM   #4
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So this would be in the front of the coach I would assume?

Rob
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Old 10-23-2017, 10:13 AM   #5
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Quote:
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So this would be in the front of the coach I would assume?

Rob
It is on my Freightliner Chassis.
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Old 10-23-2017, 10:24 AM   #6
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I believe most chassis have a factory tap used for airing up the suspension and brakes in the event of the RV needing to be towed. This is usually a quick connect which can accept and air hose. The location will vary depending upon manufacturer.
The fitting described often has a check valve so air can't be taken out from that fitting, only put in. The connection might be under the windshield in front, or in a compartment. Some are in the engine compartment.
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Old 10-23-2017, 10:24 AM   #7
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Yes and I built an air doubler to boost the pressure.
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Old 10-23-2017, 10:27 AM   #8
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Many think it easier to just have a separate air portable compressor instead of running the propultion engine to create air.
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Old 10-23-2017, 04:36 PM   #9
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Rob, if you don't have an aux air connection you would probably be better off getting a portable compressor like the VIAIR or one from Harbor Freight which operate from your battery.
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Old 10-23-2017, 06:05 PM   #10
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I just added one by installing a nipple and quick disconnect into an empty port on one of my air tanks. Used it today and realize I should have added a valve before the disconnect. It is hard to plug in while air pressure is up and dangerous to unplug. I will fix that shortly by adding a valve.
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Old 10-23-2017, 06:15 PM   #11
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Crawl around. My Country Coach had two air/moisture drains under the driver up behind the bumper. Next to them was an air quick connect to air tires etc. Our Monaco had one above the fuel tank in the compartment behind the left front steer tire. They hid them.
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Old 10-24-2017, 05:54 PM   #12
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My 2002 winnebago journey dl has one next to the Gen in front and another in the front left storage.
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Old 10-24-2017, 06:26 PM   #13
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If you add a tap to a air tank make sure it's added to the wet tank, not the primary or secondary tanks. The primary and secondary tanks are for air supply to the brakes not for accessories. Install a pressure protect valve at the tank to prevent total loss of pressure.
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Old 10-26-2017, 10:43 PM   #14
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The fitting described often has a check valve so air can't be taken out from that fitting, only put in. The connection might be under the windshield in front, or in a compartment. Some are in the engine compartment.
Is your Coach on a Spartan EC-2000 Series Chassis?

If so, where is that fitting located on your Coach?

.
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