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Air fitting

The new to us 1998 U-320 has an air fitting in the back, to the left of the hitch receiver.  Is this an inlet or outlet?  For the full air system, for the suspension, for emergency brake release? 

Or is this fitting for intermittent brake pressure for a towd?

Is there another fitting on the coach?

Matt B
Matt B
1998 u-320

Re: Air fitting

Reply #1 –
It sounds like the fitting for your braking system. Most likely an Airforce One.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Air fitting

Reply #2 –
Quote from: rbark –
It sounds like the fitting for your braking system. Most likely an Airforce One.

Or an M&G, which have been very popular with the Foretravel crowd since they're based in Texas as well.

Coach air connector option (helpful for adding air to tires) is sometimes in the LP bay.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Air fitting

Reply #3 –
Quote from: Michelle –
Or an M&G, which have been very popular with the Foretravel crowd since they're based in Texas as well.

Coach air connector option (helpful for adding air to tires) is sometimes in the LP bay.

I just found the air outlet in the LP bay!  Is this just for airing up tires and stuff, or is it also an inlet for airing up suspension, releasing parking brake, etc?
Matt B
1998 u-320

Re: Air fitting

Reply #4 –
Quote from: oldmattb –
I just found the air outlet in the LP bay!  Is this just for airing up tires and stuff, or is it also an inlet for airing up suspension, releasing parking brake, etc?
The one in the LP bay is for Airing up the tires and stuff, pretty much standard on most 
The one on back is for a brake for the toad. If there is more hardware in the engine compartment then probably air force one if just an airline from a brake line probably m&g, that's what I have.


Keith
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Air fitting

Reply #5 –
I have 2 at the rear of my coach one is for air force one, which is a female quick couple and I have a male quick coupler for filling up
the air tanks.

Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Air fitting

Reply #6 –
Quote from: oldguy –
I have 2 at the rear of my coach one is for air force one, which is a female quick couple and I have a male quick coupler for filling up
the air tanks.
My fitting is mounted on the metal crossmember, just to the left of the receiver.  Where is your male coupler?

Matt B
Matt B
1998 u-320

Re: Air fitting

Reply #7 –
Or it could be for a trailer with air brakes.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
no longer 1999 36' U320 build #5522
2013 Rzr 570 & 2018 Ranger XP1000
2006 Lexus GX470
2011 Tahoe LT 4x4
Previous 1998 45' 2 slide Newell, 1993 39' Newell

Re: Air fitting

Reply #8 –
Quote from: folivier –
Or it could be for a trailer with air brakes.
My m&g hookup on the coach is an air tubing T'ed into the air line going to the tag brake straight to the coupling on the back

Keith
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Air fitting

Reply #9 –
Quote from: hdff –
My m&g hookup on the coach is an air tubing T'ed into the air line going to the tag brake straight to the coupling on the back


An AF1 setup typically has a ping tank, IIRC.  So if one traces the line from the hitch air fitting, you should be able to tell if it's M&G (no tank) or AF1 (yes tank).

ETA very new coaches with Spartan's "Smart Tow" system will also have a ping tank.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Air fitting

Reply #10 –
Quote from: oldmattb –
My fitting is mounted on the metal crossmember, just to the left of the receiver.  Where is your male coupler?

Matt B
I would have to go out and see exactly where I put them. The air force one is near the left of the hitch and the air intake one
is just before the air drier.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport
 

Re: Air fitting

Reply #11 –
On mine the air going to the rear fitting is hooked to the brake air delivery system and is proportional to the amount of braking I am doing. If a little on the brakes the air delivered to the rear fitting is small. If I am on the brakes hard the pressure delivered is way up. If you are not braking there will be no air at that fitting. I am using the Roadmaster system.
The Starship- 1990 Grandvilla Unihome U300 40ft
6V92 Detroit Diesel w/ 4 spd Allison w/ retarder. Build# 3575 , Foretravel# 17895
The Shuttlecraft- 2015 Ford Explorer
Steve ( N6EKV ) & Lori ( N6JTD ) Faries  w/ Marlee our precious pup.
Patterson CA.