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Tractor Talk Discussion Forum

Re: Air Brakes

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Phil Scarborough

03-31-2013 08:44:56

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Hay Man, "over here" is England. I saw the list of questions posted by John, none of these are asked over here.The only question that comes near your list was " If the air gauge is going down, what do you do?" The answer is "Walk round, listen for leaks, if you hear one, ring your boss."
As for going downhill using the brakes only, that is a FAIL on the test; go down hill in lower gears, use the exhaust brake, cycle the footbrakes on and off. DO NOT keep your foot on the brake pedal.
As someone says, your tuition is still based on the days when air brakes were new. I think, reading your answers, a combination of your examination and ours would be a good idea. Phil

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Bob Bancroft

03-31-2013 11:24:10

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 Re: Air Brakes in reply to Phil Scarborough, 03-31-2013 08:44:56  
My NY class B CDL(straight trucks) has one endorsement(tank) and no restrictions. I let the hazmat expire. I believe it would list no air brakes as a restriction if that was appropriate. Seems like I recall hearing that they changed the pedal "pumping" action recommdation to continuous pressure. Apparently drivers were running low on air before they ran out of brake.

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Phil Scarborough

03-31-2013 13:37:38

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 Re: Air Brakes in reply to Bob Bancroft, 03-31-2013 11:24:10  
Bob, we are taught to change to a lower gear before descending hills so that the compressor on the engine runs faster to compensate for the increased use. Pumping the brake pedal gives time to let the brake discs cool a little between each application of the brakes, this helps prevent brake fade.Phil

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