BC Transit â Air Brake Course

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Combination Truck and Trailer (Service Line Rupture) With only the service line ruptured, like the old single circuit system, nothing occurs until a service brake application is made. Then, the trailer dynamites as previously described. If the trouble can be repaired, re-charging the trailer will release the spring brakes and the unit is back in business. …next slide... 202
Combination Truck and Trailer (mixed units) A dual circuit tractor is able to pull a single circuit trailer, and visa versa. However, a spring brake equipped trailer, once dynamited and the trouble is not repairable, must have its spring brakes “wound off.” There is no emergency release reservoir. …next slide... 203
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BC Transit - Air Brake Course Prese
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BC Transit - Air Brake Course 1. Ai
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BC Transit - Air Brake Course 1. Ai
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BC Transit - Air Brake Course 2. De
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The final factor that will determin
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Weight - Speed - Distance When weig
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Perception Time (See-Think) Percept
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4/10 sec. Brake Lag (mechanical lag
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Stopping Distance…(total stopping
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Apply the principal from the previo
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Using Compressed Air to Our Advanta
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Combining mechanical advantage to a
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As the driver applies the brake ped
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Review Questions: Section 1 1) What
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BC Transit - Air Brake Course 3. Fi
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The Governor The governor may be co
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One-way Check Valve The one-way che
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Air Lines • Air lines link compre
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Safety Valve The Reservoirs One-way
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Air Gauges 60 50 40 70 80 85 90 100
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The Foot Valve The foot valve contr
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The Foundation Brakes: Brake Chambe
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Automatic Slack Adjusters Pre-Trip
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Brake Chambers and Slack Adjusters
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Review Questions: Section Three 1)
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BC Transit - Air Brake Course 4. Ba
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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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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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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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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
Page 151 and 152: Emergency Functions The following s
Page 153 and 154: Supply Line Rupture (trailer intact
Page 155 and 156: Supply Line Rupture (handling the s
Page 157 and 158: Service Line Rupture (continued) 1)
Page 159 and 160: Loss of Main Reservoir Air In this
Page 161 and 162: Supply & Service Lines Crossed (air
Page 163 and 164: Three Tests to Confirm Emergency Re
Page 165 and 166: Three Tests to Confirm Emergency Re
Page 167 and 168: Review Questions Section Six (Tract
Page 169 and 170: BC Transit - Air Brake Course 7. Du
Page 171 and 172: The Purpose of Dual Air Systems Dua
Page 173 and 174: Identifying Primary and Secondary C
Page 175 and 176: Primary and Secondary Systems (cont
Page 177 and 178: The Simple Dual Circuit System One-
Page 179 and 180: Secondary Air Loss (Foot Valve Appl
Page 181 and 182: Adding the Park Brake (spring brake
Page 183 and 184: Primary Air Loss and Park Brake Fun
Page 185 and 186: Enter the Modulator Valve The modul
Page 187 and 188: The Modulator Valve (secondary air
Page 189 and 190: The Modulator Valve (primary air lo
Page 191 and 192: The Modulator Valve (primary air lo
Page 193 and 194: Dual Air System Summary 1) The purp
Page 195 and 196: BC Transit - Air Brake Course 8. Du
Page 197 and 198: Combination Truck and Trailer with
Page 199 and 200: SYSTEM PARK TRAILER SUPPLY TRACTOR
Page 201: Combination Truck and Trailer (Supp
Page 205 and 206: Combination Truck and Trailer (Prim
Page 207 and 208: Section Review - Dual Air - Tractor
Page 209 and 210: T-75 Off Highway System - Single Un
Page 211 and 212: L-75 Off Highway Combination with S
Page 213 and 214: Schedule SX Trailer (spring equippe
Page 215: Thank you for viewing this Air Brak
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BC Transit â Air Brake Course