FD Airbrakes

• motor mounted
• runs off cam shaft (faster engine=faster compressor)
• shuts off when at working pressure
• danger if doesn't shut off

• removes 90% mosture and oil from system
• moisture causes corrosion (increased wear) and freezing
• May reduce the

• Fist tank to fill when system is charging
• Collects moisture and oil that dryer did not get

Stores air needed for all opperations

• Petcocks
• Wet Tank need to be drained weekly
• Service tanks less, but can be same

Deliver air from tanks to air opperated appliances

Is separate from CAFS system

• Back flow preventers
• In various places throughout

• Slack adjuster- only easy adjustment point
• Automatic or Manual
• Drum
• Shoe

• Found on front wheels of most moder apparatus
• 80% braking power is front brakes
• Caliper
• Rotor
• Smaller pad to rotor contact reduces overheating

• Powerful spring held back by air pressure
• AKA parking or Maxi brake
• 40-50 PSI
• Applied when pressure drops or parking brake applied.
• Back wheels only

• Applied once stopped to release the spring brake
• Can only go 2 mph
• Must hold pressure on button while traveling

• Mechanical lock for front brakes
• Requires air pressure to work

This and the right gear are the best defense against brake fade (heat)

• Allows for steering in a skid
• Requires more distance to stop
• Superior to standard brakes
• Allows full control of vehicle

• Jake Brake- uses air pressure in engine
• Electromagnetic - no contact no overheating
• Hydraulic Transmission Retarder -enclosed may overheat