Skytech

Industry Training

ST34 Air Brake Systems (3 days)

This course will introduce you to air brake systems. The module will cover the safe work practices that apply to working with and on air brake equipped vehicles. Upon successful completion of this module the student will be able to safely work on and around air brake equipped vehicles following the manufacturers recommendations and established safe work practices.

Module Content:

1. Define the purpose and fundamentals of basic air brake systems.
   • laws of levers
   • mechanical advantages
   • co-efficient of friction
   • pressure volume relationship
   • spring brake chamber calculations
     • potential energy
     • linear force
     • leverage
     • brake torque
     • brake friction factors
   • effects of vehicle load and speed
   • Canadian Motor Vehicle Safety Standards (CMVSS) 121
2. Describe the functions, construction features, composition types, and application of basic air brake systems.
   •  air supply system
   • primary service circuit
   • secondary service circuit
   • park/emergency circuit
   • foundation assemblies
     • S-cam
     • wedge
     • disc
   • slack adjusters
   • actuator chambers
   • hoses, lines, and fittings
3. Explain the principles of operation of basic air brake systems.
   • air supply system
   • primary service circuit
   • secondary service circuit
   • park/emergency circuit
   • foundation assemblies
     • S-cam
     • wedge
     • disc
   • slack adjusters
   • actuator chambers
   • hoses, lines, and fittings
4. Perform inspection and testing procedures following manufacturers recommendations and perform assigned operations of air brake systems.
5. Perform foundation brake checks for:
   • stroke length
   • automatic slack adjusters
6. Outline procedure for air compressor, air dryer, air receiver and testing
7. Testing adjust governors
   • test control valves for recommended operation
   • brake torque balance
   • brake timing
   • demonstrate brake disc and drum machining operations
   • interpret pneumatic schematics
   • interpret statutory inspection safety criteria
8. Recommend reconditioning or repair following manufacturers recommendation and perform assigned operations of air brake systems.
   • perform a demonstration to disarm spring brake chambers following recommended safety practices
   • service foundation components:
     • perform completion wheel-end service
     • disc brake foundation
   • perform a demonstration of servicing pneumatic circuit components
     • electrically actuated systems (brake by wire)
   • perform air brake adjustment according to recommended procedures
   • readjust air governors
   • interpretation of statutory specifications

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Sudbury, Ontario
Canada P3A 3V8

(705) 566-8101

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