
Originally Posted by
Cloggy
When they come to a stop you mean? If so then I believe it's the vacuum operated brakes.
If it's when they come to complete halt, that is compressed air releasing from the brakes when the drivers brake pedal is released. Truck wheel brakes are operated by compressed air.
If it's at highway speeds, they can increase their engine braking ten or twenty fold by forcing the engine to stop raising its' exhaust valves. On older trucks this makes a huge farrrrrrt-sound racket, and can often be heard many km's away on a still morning.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
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