Originally Posted by erald
We are just proud owner of an used American Tradition. We are planning to tow our car on a dolly (cannot be towed on 4 wheels)
Inspecting the RV we found that the tow bar has 3 receivers. Now it is clear we have to use the middle one for our dolly. But we are wondering for what we can use the other 2. My guess is that they are useless when towing a dolly since think anything will be in the way when taking corners. (see picture)
Also on the left of the middle receiver it looks like we have an air connection. For what can that be used?
We are completely new to Rv'ing so trying to read on this great forum
Well, it appears that you maybe received no "Walk through" or, any other form of indoctrination on your new to you coach. No biggie, it happens daily. Three 2" receivers in about 99.99% of the cases, indicates that something heavy was carried back there at one time or another. Normally, it's some form of a rack that would hold maybe a motor cycle or, maybe a quad, or even maybe a heavier type 4-wheel electric scooter for a person that has a hard time getting around.
The second and third, (left and right of center) are added for carrying the additional weight and, provide for more stability of any such rack. Even if you have no plans on using them any time soon, if it were me, I'd simply leave them there as, it's possible you may find a need for them at a later date, including carrying some form of a rack for things mentioned above. The pose no threat to towing of any toad, on a dolly or otherwise.
As for the air fitting, there's at least three possibles on that.
1. Air Brake application line for,
A. SMI Brake system
B. M & G Air brake system
C. Potential air supply for airing up tires etc.
About a 30 second inspection and back-following of that line will trace where it leads to or, emanates from. If it indeed it leads to certain parts or lines of the rear brake system, it is an air brake application line for either of the aftermarket braking systems above.
If that line emanates from a tank, or, a "T" in any line, other than any form of a brake system line, it is highly unlikely it has anything to do with brakes. Again, a brief inspection will reveal its true identity.