Air pressure reading??

Discussion in 'Trucking Schools and CDL Training Forum' started by ayaytc, Jun 15, 2022.

  1. ayaytc

    ayaytc Bobtail Member

    17
    11
    May 24, 2022
    0
    Hi all.

    I’m studying for my air brake test and there’s one nagging detail I can’t figure out: during my 60 second air leak test, how on Earth am I supposed to measure 2 or 3 or 4 PSI on this thing??
     

    Attached Files:

  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Judge

    Judge Road Train Member

    11,158
    71,346
    Mar 19, 2014
    Arkansas
    0
    Just make sure the needle doesn’t move, much after you apply brakes and it settles down, be sure to apply constant pressure, more on peddle takes more air.
     
    AModelCat and tscottme Thank this.
  4. tscottme

    tscottme Road Train Member

    You just have to recognize if the air pressure drops MORE than 2-4 PSI. The PSI is a well-maintained truck will show NO PSI drop. You are looking for NO drop, in most cases. If the truck has an air leak then the law allows the air leak if it doesn't exceed the 2-4 PSI allowance.
     
    AModelCat Thanks this.
  5. bavarian

    bavarian Heavy Load Member

    727
    781
    Feb 13, 2014
    Winnipeg
    0
    You nailed it.
    Put the foot on the pedal, wait until everything has settled then start the clock. No further movement should happen after that.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.