faulty master brake system
The brake pads are most likely worn and the metal backer is digging into the rotor. Check the brakes before a rotor breaks and you are without brakes.
Applying the brakes.
Using brakes slows your speed.
brakes, or no sun
50 psig
Yes, that will work.
If you suspect something, get them checked. If you get vibration while applying the brakes, get them checked. If you get grinding noise from the brakes, get them checked.
No brakes on anything work because of gravity. Pressure and friction are what stop anything utilizing brakes. On a bike, you pull the brake lever on the handle bar and it pulls the line connected to your brakes. The two brakes pads on either side of your wheel compress, applying friction and thus stopping your bike. The harder you pull, the faster you stop.
Applying the brakes with your foot!
applying the brakes
My understanding is this: HGV brakes operate on compressed air as I am sure you know, however the brakes are spring loaded which means rather than applying the brakes, the air pressure is what keeps them OFF, so when the system runs out of air the brakes will lock on solid. when you are driving and you push the brake pedal what is happening is that the pedal valve is shutting off the supply of air to the brake chambers and the friction material (either shoes or pads) is drawn by spring pressure towards the disc or drum.