*** Class B CDL - Air Brake Test - School Bus ***

A more recent version of this video exists. Please, go to:    • 34. Air Brake Test – School Bus – Class B CDL   Presentation of the Air Brake Test on a 2011 IC Conventional Style School Bus (Pre-Trip Inspection), using the acronym "SALSSP", in Richmond Hill, Georgia. S: Safe Start A: Air Leak Test (static and applied service brake) L: Low Air Pressure Warning Test S: Spring Brake S: Service Brake P: Parking Brake The air brake is applied, when the yellow diamond button is pulled. It is released when the same button is pushed. ** At approximately 120 psi, the airdryer pops. It sends bursts of air back to governor to stop the compressor from pumping air. ** ** The wheels of the vehicle must be chocked to perform the air brake test. ** For more details, refer to your state's Department of Motor Vehicles-issued Commercial Driver's License Manual.