DIET 2010 Syllabus

 

Air Brakes Air Supply and System Service
Order        Description
   1            Diagnose poor stopping, air leaks, premature wear, pulling, grabbing, dragging, or balance
                 problems caused by supply and service system malfunctions; determine needed action P-1
   2            Check air system build-up time; determine needed action P-1
   3            Drain air reservoir/tanks checking for oil, water, and foreign material; determine needed action
                 P-1
   4            Perform inspection of compressor drive gear and coupling; replace as needed P-3
   5            Perform inspection of air compressor inlet checking oil supply, coolant lines, fittings, and
                 mounting brackets; repair or replace as needed P-2
   6            Inspect and test air system pressure controls such as the governor, unloader assembly valves,
                 filters, lines, hoses, and fittings; adjust or replace as needed P-1
   7            Inspect air system lines, hoses, fittings, and couplings; repair or replace as needed P-1
   8            Inspect and test air tank relief (safety) valves, one-way (single) check valves, two-way (double)
                 check valves, manual and automatic drain valves; replace as needed P-1
   9            Inspect and clean air drier systems, filters, valves, heaters, wiring, and connectors; repair or
                 replace as needed P-1
  10           Inspect and test brake application (foot) valve, fittings, and mounts P-1
  11           Check pedal operation and adjust or replace as needed P-1
  12           Inspect and test stop light circuit switches, wiring, and connectors; repair or replace as needed
                 P-1
  13           Inspect and test hand brake (trailer) control valve, lines, fittings, and mountings; repair or replace
                 as needed P-1
  14           Inspect and test brake relay valves; replace as needed P-1
  15           Inspect and test quick release valves; replace as needed P-1
  16           Inspect and test tractor protection valve; replace as needed P-1
  17           Inspect and test emergency (spring) brake control/modulator valve(s); replace as needed P-1
  18           Inspect and test air pressure gauges, lines, and fittings; replace as needed P-1

 

Air Brakes Mechanical Service
Order        Description
   1            Identify poor stopping, brake noise, premature wear, pulling, grabbing, or dragging problems
                 caused by the foundation brake, slack adjuster, and brake chamber problems; determine needed
                 action P-1
   2            Inspect and test service brake chambers, diaphragm, clamp, spring, pushrod, clevis, and
                 mounting brackets; repair or replace as needed P-1
   3            Perform inspection and service of manual and automatic slack adjusters; perform needed action
                 P-1
   4            Inspect camshafts, rollers, bushings, seals, spacers, retainers, brake spiders, shields, anchor pins,
                 and springs; replace as needed P-1
   5            Perform inspection, cleaning, and adjusting of air disc brake caliper assemblies; determine needed
                 repairs P-3
   6            Inspect and measure brake shoes, linings, or pads; perform needed action P-1
   7            Inspect and measure brake drums and/or rotors; perform needed action P-1

 

Parking Brakes
Order        Description
   1            Inspect and test parking (spring) brake chamber diaphragm and seals P-1
   2            Perform replacement of parking (spring) brake chamber P-1
   3            Dispose of removed parking (spring) brake chambers with local regulations P-1
   4            Inspect and test parking (spring) brake check valves, lines, hoses, and fittings; replace as needed
                 P-1
   5            Inspect and test parking (spring) brake application and release valve; replace as needed P-2
   6            Manually release (cage) and reset (uncage) parking (spring) brakes in accordance with
                 manufacturers' recommendations P-1

 

Hydraulic Brakes Systems and Service
Order        Description
   1            Identify poor stopping, premature wear, pulling, dragging, balance, or pedal feel problems
                 caused by the hydraulic system; determine needed action P-2
   2            Check brake pedal pushrod length and adjust as needed P-3
   3            Inspect and test master cylinder for internal/external leaks and damage; replace as needed P-2
   4            Inspect hydraulic system brake lines, flexible hoses, and fittings for leaks and damage; replace as
                 needed P-2
   5            Inspect and test metering (hold-off), load sensing/proportioning, proportioning, and combination
                 valves; replace as needed P-3
   6            Inspect and test brake pressure differential valve and warning light circuit switches, bulbs, wiring,
                 and connectors; repair or replace as needed P-2
   7            Inspect disc brake caliper assemblies; replace as needed P-2
   8            Inspect or test brake fluid P-2
   9            Perform bleeding and/or flushing of hydraulic brake system P-2
  10           Determine proper brake fluid type P-2