Pete 389. Parking brake won't release, please help

All tractor brakes locked? The air you are hearing leaking from push valves and valve assembly on crossmember is usually a symptom of a leaking brake can

 

You also have a new problem. Your brake air from wet to dryer and into the dry tank for your foot to stop everything is got too much moisture, oils and what not. Ate through the rubber divider in the service can and spring can at the wheel and push rods etc.

Usually when a can goes like that when you use braking on foot your Primary falls like crazy followed by your secondary you have about 40 seconds to set it somewhere or get off it for the compressor to catch up. That will take a while with the low air in your ear.

 

Ok. Im sorry let me think about it.

You have a can that has a rod coming out to push all them pads on the wheel. It's about the same as your coffee pot or smaller.

That can has spring in it. That is why you cannot move at all once those springs take hold. In half that can between Mr Spring and Mr Bigfoot (Thats you using the brake on the cab floor trying to stop...) is what normally keeps Mr Spring tied up in his corner so you can roll.

There is a rubber disc just like a coaster under your beer on the bar. It's flappy. That seals the can and keeps Mr Spring and Mr Bigfoot getting along.

IF YOU poke a hole through that disk every time you use your foot to stop... ALL your air goes out through that hole.

Then you will stop when Mr Springs and company decides to apply.

Does this help? Or would you like pictures?

 

Oh god I cannot tell you.

If Mr wrench is a idiot then we all are idiots.

If he knows whats what and can hear the #### air leak thats the problem everything else threatens to add more Mr Fix its feeding on Mr Wallet.

When I pulled in with a bad can the shop man spun and said #### stop that right here, you get bad can under there...

 

If you can figure out where the air is leaking that is the place to start. That part is both easy (noise) and hard (pinpointing noise by feeling with fingers).

When you have that data, then we have something to chew on. Right now it's just hot air.

EDIT: also, if you have an automated transmission, air could leak from one of the hoses to the actuators and that could prevent you making enough pressure to overcome the spring brakes. So put on your grubbies and go feel/listen around the trans.

Just Do It gets real.