When you separate the two pedals it gives you the ability to operate the brakes independently. That comes in handy for tight turns or getting out of mud. If you have a heavy load it takes the weight off your steering axle and you can steer the tractor with the brakes.
The most common brakes on a tractor trailer are the s-cam brakes
yes it is for wet brakes
how do i take the brakes out of a massy165
u just do it
They're not just on tractor-trailers - you'll find them on most air brake equipped vehicles. Spring brakes can be described as parking brakes. That's the simple answer. They are brakes which are held down by a spring. When air pressure is introduced into the system, via the service air system, the air pushes against those brakes, forcing the spring to compress, and releasing the brakes. The air pressure must remain constant in order for the spring brakes to remain released.
Yep. What about them? S-cam foundation brakes, disc brakes, and piston brakes are available. Wedge brakes are a bit of dinosaur, but still might be seen from time to time (particularly on the steer axles of vocational and heavy haul trucks).
Need to get to them they freezing up from rust
It's a dual circuit air brake system. Most use S-cam foundation brakes, although some use disc brakes or piston brakes.
https://www.youtube.com/watch?v=tb1ul7yZ3FU The above decribes how to adjust the brakes on the ford 2000, 3000, and 5000 tractors.
Off.
Disc brakes and drum brakes.
It is the metal connector at the end of the hoses that supply air to the trailer brakes from the tractor.