Inspection第 31 / 60 题
How do you perform the static leakage (applied pressure) test on a straight truck with air brakes?
a.With a fully charged system, release the brakes, turn off the engine, apply full brake pressure, and watch that the drop does not exceed the allowed limit
b.Drain the tanks and check that they refill on their own
c.Drive at 20 mph and slam on the brakes
d.Disconnect the trailer and check the gladhands
解析
With the air system fully charged (about 125 psi), turn off the engine, release the parking brake, and hold the brake pedal down (fully applied). After the initial pressure drop stabilizes, the air pressure should not drop more than 3 psi in one minute for a straight truck (4 psi for a combination). A greater loss means there is a leak that must be repaired.
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