Compressed Air Connection

[Rook]

I did a couple of searches on this subject, but no useful info turned up.

I want to make a permanent connection to my compressed air system with a shut-off valve and a 50 ft hose.....to be used for airing up my tires, etc. I have seen the "owner connection manifold" mounted on the firewall on the drivers side just up and to the right of the generator in the front. It's a bit difficult to get to for me to try it myself, so will pay someone to do it for me.

I am especially interested in "photos", and any sources for the necessary parts. Thanks, Rook

[sgtjoe]

I'll be keeping an eye on this post to see if anyone did it and if it will handle the tires as good as a Husky.

[sdennislee]

See post number 26 in the following thread, it might give you some ideas
what have you done to your motorhome

BTW my coach has 2 service air connections, one to allow tow truck operator to put air in to the system (male connection) and one for me to get air out of the system (female connection).

The male is an automotive type fitting while the female is a type M fitting.

[Rook]

Thanks sdennislee, that's an excellent video that explains the whole process.......My National Tradewinds does not have the Air System connection shown in the video....that is exactly what I want to install. My guess is that most RV'ers with air brakes do not understand that if they have an engine failure, after they have applied the parking brakes, that the brakes are mechanically "locked" and they will need compressed air to release them before the coach can be moved! I wonder if the required parts can be purchased at Lowes or Home Depot? Rook

[KIX]

Instead of installing one male and one female connectors why not just install the female quick connect and carry a male-to-male adapter in case you need to "import" air. Works for me.

[sdennislee]

Quote:

Originally Posted by KIX Instead of installing one male and one female connectors why not just install the female quick connect and carry a male-to-male adapter in case you need to "import" air. Works for me.

Mine came from the factory with one male and one female. I think they assume the end of the hose reel on the tow truck will have a female end for using air tools etc... So its a snap for them to just push it on the male fitting in the coach. Just a guess.

Either will work as long as it lets air in or out depending on the task.

[sdennislee]

Here is the list of parts in case you need it.

The 1/4" poly hose (Hitachi), air filter and fittings came from Lowes.

The in-line bleeder valves (in-line blow guns) and lock-on chucks are from MSC Industrial

In-Line Blow Guns - Blow Guns | MSCDirect.com

Air Chucks - Air Chucks & Air Line Inflator & Gauge Assemblies | MSCDirect.com

Air Chucks - Air Chucks & Air Line Inflator & Gauge Assemblies | MSCDirect.com

The straight lock-on chuck and Blue Point Digital inflator were laying around the garage. The chuck in Milton, sorry no part number on it and the Blue Point is from Snap-On

[Mr_D]

Both our DSDP's have come from the factory with the connection under the "hood".

[GreaTOne65]

Hi, guys and gals. I took the time to plumb a line to the rear tank on my Discovery. I put in a 1/4 turn ball valve and female air chuck. I bought a 30' hose, installed the air line connectors on, and figured I had done a really smart thing? Wrong! While I can air up the tires on the car, and the trailer, it will not air up the tires on the rig. The gauges on the chassis says they have 130 psi, but it will not put 100 psi. in the rigs tires, even with the engine running. While it was not a big project, it has not been very rewarding, to say the least.

Dale

[sdennislee]

Quote:

Originally Posted by GreaTOne65 Hi, guys and gals. I took the time to plumb a line to the rear tank on my Discovery. I put in a 1/4 turn ball valve and female air chuck. I bought a 30' hose, installed the air line connectors on, and figured I had done a really smart thing? Wrong! While I can air up the tires on the car, and the trailer, it will not air up the tires on the rig. The gauges on the chassis says they have 130 psi, but it will not put 100 psi. in the rigs tires, even with the engine running. While it was not a big project, it has not been very rewarding, to say the least. Dale

Are you watching the system pressure and only airing up when system pressure is above tire pressure?

I easily get 110 pis in my front tires, but only when system pressure is at 110 or above. If yo have any questions about this process watch this video.

[Rook]

My coach has NOTHING, no connection to the compressed air system. However, the Owner's Manual does mention that there is an "owner's connection manifold" available to connect to and I found it on the frontside of the firewall on the driver's side up high to the right of the generator. It has several unused 1/4in connection ports. I will connect to that, run the hose down and under the genny and mount it just to the left of the genny on a frame member. I do have a pressure dash gauge for both the front and back system....the pressure varies from about 90lbs to 120lbs. My tires will require 95lbs. Rook

[Cougarkid]

Why not just plug a 4' or 5' long hose into the connection. Tie the end off where you can get to it. Then you can plug your long hose in easily.

Quick, easy fix.

[GreaTOne65]

Quote:

Originally Posted by sdennislee Are you watching the system pressure and only airing up when system pressure is above tire pressure? I easily get 110 pis in my front tires, but only when system pressure is at 110 or above. If yo have any questions about this process watch this video.

Thanks, sdennislee! Boy do I feel like a dope! I have been around semi-trucks and large equipment my whole life, and this has really opened my eyes. It never occured to me, that I needed to check the pressure to see if the compressor was running.

Well, just proves your never to old to learn, or no fool like an old fool! Take your choice!! LOL!!

[Rook]

Quote:

Originally Posted by Cougarkid Why not just plug a 4' or 5' long hose into the connection. Tie the end off where you can get to it. Then you can plug your long hose in easily. Quick, easy fix.

UH.....it's not that easy for me on my coach! The Compressed Air Manifold is difficult to get to, it's between the front and the firewall, way up high and off to the right....it cannot be accessed from the ginny opening, too far to reach, plus you cannot just plug something in.....you have to remove one of the several 1/4in threaded plugs and screw in a male 1/4 inch threaded connection. Rook