BC Transit – Air Brake Course

Automatic Slack Adjusters
Pre-Trip Inspection:
•Set up brakes before the start of each day’s shift.
•Maximum push rod travel with a type 30 brake chamber under a full foot
valve application must not exceed 2 inches - using the pry bar method, there
should be no more than ¾of an inch of push rod travel.
•When making a full foot valve application with engine off and park brake
released, look for any large drops in air pressure as indicated on the
pressure gauge.
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