Air Brake Check Flashcards
The air compressor must cut-in no lower than ___.
85 psi
Check air compressor governor cut-out pressure Run the engine at a fast idle. The air governor will cause the compressor to cut-out at ___ max.
130 psi
Normal acceptable cut-out range is from ____
110 to 120 psi
Test air leakage rate With a fully-charged system (typically ____), turn off the engine, release all brakes and then apply full steady pressure to the brake pedal (brake on) and hold (for one full minute).
125 psi
The air pressure should not fall more than :
- ___ in one minute for single vehicles, or
3 psi
The air pressure should not fall more than :
- ___ in one minute for combination vehicles.
4 psi
Test low pressure warning signal With the engine off, low pressure warning device must activate between ____.
55 and 75 psi
Non-power steering: Check for excessive play by turning steering wheel back and forth. Play should not exceed ____ (or about ____ on a 20-inch wheel).
10 degrees / two inches
Power steering: With the engine running, check for excessive play by turning the steering wheel back and forth. Play should not exceed ____ (or about ___ on a 20-inch wheel) before front wheels begin to move.
10 degrees / two inches