Air brake question 2

[panzerjunky]

When I stopped mid way home and checked the brake drums for heat and found one side a little warm I turned off the main valves on both service and emergency popped off the gladhands to relieve pressure. and pit them back on with the main valves closed just so they looked hooked up.
My theory was to go a few more miles to see if the drums cooled down.
anyway the truck would not move.
so do I have to have air at all times to release the brakes so the trailer will move or do I just drain the trailer mounted air tank?
If someone has the time could you explain how the system works.
Thanks Jerry

 

[greenjeepster]

If you are talking about a trailer with air brakes then the answer is yes. They are air over spring brakes; A lack of air pressure causes the spring brakes to engage.

 

[doghead]

This should be asked in your other thread that you posted about 10 minutes ago.

Also, both of these questions should be in the trailer forums.

 

[panzerjunky]

why posted this way

This should be asked in your other threar that you posted about 10 minutes ago.

Also, both of these questions should be in the trailer forums.

I posted this here as I wanted someone who has a Deuce and might actually have practical experience with this to answer and i posted it in 2 seperate posts as I have found when it gets to long or there are to many questions they all don't get answered or the point gets lost in the answers.
sorry for ruffling your feathers Doghead
Thanks Jerry

 

[sandcobra164]

Emergency air to release, Service Air to apply. I just answered this in your other post. Basically, Air Brake's have two chamber's, one hooked to the emergency line to release the spring's that apply the brakes in the instance of no air pressure, the other to apply the brakes once you press the brake pedal down. Most of the time, we left the service air line unhooked as the truck was more than enough to stop the load and most of the trailer's had brakes that would stick once applied.

 

[fasttruck]

Air over hydraulic brakes such as m127, generator chassis etc that have two air lines use a relay valve to actuate brake. Emergency line keeps air resevoir full and brakes off. Service line is empty until applicator valve meters air out of tank into hydraulic master cylinder to operate wheel brake. Both lines have to be correctly hooked up and both air valves on rear of chassis open to properly operate brake. When hoses are disconnected relay valve will apply wheel brake and hold it on until the air leaks off and then the brake will release and remain so until air pressure is restored. Time for this leakage to occur can range from minutes to days depending on how tight the brake system is. Unlike straight air brakes such as m 871, m 870 etc use, there is no spring brake feature to hold the brake on indefintley and this phenomona must be understood by the user to correctlt maintain and operate the equipment.

 

[Stan Leschert]

I do not want to sound snarky, BUT!!!
Unless you have been trained and are qualified (ie: liscenced) to operate air brake equipped vehicles, please do not do so.
Pay for a course.
After that, get a retired MV instructor to teach you about the toy that you have.
PLEASE, PLEASE, PLEASE!
All that we need is more Gubbernmint goofs jumping all over green truck guys.
What you do will affect all of us, no matter where we are.
So, I beg you, get the proper training.

 

[jasonjc]

It would HELP alot to know what you are talking about???? Is this a trailer??? What kind of trailer??? The M105 trailers over the years have had at lest 3 diferent types of brakes. To anser the ? we need to know what you are talking about.