BC Transit â Air Brake Course

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BC Transit – Air Brake Course 2. Definitions & Concepts: b) Weight & Speed – Stopping Distance 10
Weight - Speed - Distance When weight is doubled, the braking power to stop in the same distance, must double! When speed is doubled, the braking power required to stop in the same distance must increase 4 times! When weight and speed are doubled, the braking power to stop in the same distance must increase 8 times! A vehicle carrying a load of 14,000 kgs at 16 km/h is brought to a stop in 30 meters under normal braking. If this vehicle’s weight increased to 28,000 kgs., and the speed was increased to 32 km/h, it would require 8 times the braking power to stop in the same 30 meter distance. Remember, this is under ideal conditions. If traction were reduced by poor road conditions, what effect would this have on overall stopping distance? 11
Page 1 and 2: BC Transit - Air Brake Course Prese
Page 3 and 4: BC Transit - Air Brake Course 1. Ai
Page 5 and 6: BC Transit - Air Brake Course 1. Ai
Page 7 and 8: BC Transit - Air Brake Course 2. De
Page 9: The final factor that will determin
Page 13 and 14: Perception Time (See-Think) Percept
Page 15 and 16: 4/10 sec. Brake Lag (mechanical lag
Page 17 and 18: Stopping Distance…(total stopping
Page 21 and 22: Apply the principal from the previo
Page 23 and 24: Using Compressed Air to Our Advanta
Page 27 and 28: Combining mechanical advantage to a
Page 29 and 30: As the driver applies the brake ped
Page 31 and 32: Review Questions: Section 1 1) What
Page 33 and 34: BC Transit - Air Brake Course 3. Fi
Page 35 and 36: The Governor The governor may be co
Page 37 and 38: One-way Check Valve The one-way che
Page 39 and 40: Air Lines • Air lines link compre
Page 41 and 42: Safety Valve The Reservoirs One-way
Page 43 and 44: Air Gauges 60 50 40 70 80 85 90 100
Page 47 and 48: The Foot Valve The foot valve contr
Page 49 and 50: The Foundation Brakes: Brake Chambe
Page 51 and 52: Automatic Slack Adjusters Pre-Trip
Page 53 and 54: Brake Chambers and Slack Adjusters
Page 57 and 58: Review Questions: Section Three 1)
Page 59 and 60: BC Transit - Air Brake Course 4. Ba
Page 61 and 62:
No. 2 GOVERNOR: tells compressor wh
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No. 4 AIR LINES: link air from one
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No. 11 BRAKE SHOES AND LININGS: sho
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No. 13 SLACK ADJUSTER: provides a m
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No. 15 BRAKE CHAMBER: part of force
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Quick Release Valve and Stop Light
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The Relay Valve The relay valve pro
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In this diagram, the dark green lin
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• Because the relay valve accesse
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BC Transit - Air Brake Course 4. Ba
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A spring type park brake serves thr
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However, some valves may be designe
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Park Brake and Service Brake Releas
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Park Brake Applied - Service Brake
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Mechanical Release of the Park Brak
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“Maxi-Brake” type Park Brake Th
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“Maxi-Brake” Operation (single
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Park brake systems with double cont
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Park Brake Emergency Functions... 1
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BC Transit - Air Brake Course 4. Ba
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No. 6 LOW AIR WARNING DEVICE: activ
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No. 8 RELAY VALVE: provides quicker
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Review of Section Four 6) Why is it
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BC Transit - Air Brake Course 5. Ot
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Page 115 and 116:
ATC (Automatic Traction Control)
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Long Stroke Push Rods Many new air
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Disc Brakes Callipers Rotor …oper
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Wedge Brakes This type of brake use
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Section Six Single Circuit Tractor
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Parts of the Trailer (van style) 1)
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The “Fifth Wheel” The fifth whe
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Hooking Up (Step 2) A visual inspec
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Charging the Trailer Brake Reservoi
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The Semi-Trailer Ready for its Pre-
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Tractor-Trailer Trailer Air Brake S
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Introduction to Valves and Componen
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The Hand Valve The Hand Valve is mo
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The Tractor Protection Valve The Tr
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Accidental Hand Valve Application (
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The Trailer Supply /Delivery Line T
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The Emergency Relay Valve The Emerg
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Foot Valve Application (trailer con
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Emergency Functions The following s
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Supply Line Rupture (trailer intact
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Supply Line Rupture (handling the s
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Service Line Rupture (continued) 1)
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Loss of Main Reservoir Air In this
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Supply & Service Lines Crossed (air
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Three Tests to Confirm Emergency Re
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Three Tests to Confirm Emergency Re
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Review Questions Section Six (Tract
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BC Transit - Air Brake Course 7. Du
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The Purpose of Dual Air Systems Dua
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Identifying Primary and Secondary C
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Primary and Secondary Systems (cont
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The Simple Dual Circuit System One-
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Secondary Air Loss (Foot Valve Appl
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Adding the Park Brake (spring brake
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Primary Air Loss and Park Brake Fun
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Enter the Modulator Valve The modul
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The Modulator Valve (secondary air
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The Modulator Valve (primary air lo
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The Modulator Valve (primary air lo
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Dual Air System Summary 1) The purp
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BC Transit - Air Brake Course 8. Du
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Combination Truck and Trailer with
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SYSTEM PARK TRAILER SUPPLY TRACTOR
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Combination Truck and Trailer (Supp
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Combination Truck and Trailer (mixe
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Combination Truck and Trailer (Prim
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Section Review - Dual Air - Tractor
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T-75 Off Highway System - Single Un
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L-75 Off Highway Combination with S
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Schedule SX Trailer (spring equippe
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BC Transit â Air Brake Course