Step 1 - Chock your wheels (take key), Step 2 - "I will now begin my air brake test". The primary gauge should be at 85 PSI or under. Safe start the vehicle. "I will now perform the Governor cut-off test". Accelerate no more than 1300 RPMs to reach maximum air pressure., Step 3 - "My primary needle stopped moving at___PSI. this was a good test because the air Governor Cut-off between: 120-140 PSI. Turn the vehicle off. Push in yellow and red knobs. Turn the key on (Let the primary needle to stabilize)  ,

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