Originally Posted by accumack
No it's air for a tow truck to hook up to the Berkshire's air brakes. It just has several uses.
A tow truck MAY (meaning I don't know one way or the other) be able to release the parking break by energizing that air fitting, but I had to have a semi towed and the guy had to crawl under the back of the rig (near the rear axle) and mechanically release the brakes from there.
As as aside, I still laugh about it, but the tow truck owner, his son and a "flunky" towed me back to their yard, then proceeded to get into a huge argument. It culminated in the guys son chasing the "flunky" all around the yard, swinging a 4 foot 2x4!! It was scary then, but funny as hell now (in retrospect)!!!
Moral.... If you ever need towed in Zanesville, Ohio.......
Be afraid..... BE VERY AFRAID!!!