BC Transit â Air Brake Course

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BC Transit – Air Brake Course 3. Five Main Components: e) Foundation Brakes (Brake Chambers, Slack Adjusters, Brake Linings & Brake Drums) 48
The Foundation Brakes: Brake Chamber, Slack Adjusters, and Brake Linings /Drums A brake chamber is a circular container divided in the middle by a flexible diaphragm. Air pressure pushing against the diaphragm causes it to move away from the pressure, forcing the push rod outward against the slack adjuster. The force exerted by this motion depends on air pressure and diaphragm size. The Slack Adjuster has two functions in the operation of the vehicle's brakes. First, it converts the pushing motion of the push rod into a twisting motion at the “S” cam. Second, as the name suggests, the slack adjuster provides a means of reducing “free play” or slack in the foundation brake linkages. 49
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 and 10: The final factor that will determin
Page 11 and 12: Weight - Speed - Distance When weig
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: The Foot Valve The foot valve contr
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
Page 63 and 64: No. 4 AIR LINES: link air from one
Page 65 and 66: No. 11 BRAKE SHOES AND LININGS: sho
Page 67 and 68: No. 13 SLACK ADJUSTER: provides a m
Page 69 and 70: No. 15 BRAKE CHAMBER: part of force
Page 71 and 72: Quick Release Valve and Stop Light
Page 73 and 74: The Relay Valve The relay valve pro
Page 75 and 76: In this diagram, the dark green lin
Page 77 and 78: • Because the relay valve accesse
Page 79 and 80: BC Transit - Air Brake Course 4. Ba
Page 81 and 82: A spring type park brake serves thr
Page 83 and 84: However, some valves may be designe
Page 85 and 86: Park Brake and Service Brake Releas
Page 87 and 88: Park Brake Applied - Service Brake
Page 89 and 90: Mechanical Release of the Park Brak
Page 91 and 92: “Maxi-Brake” type Park Brake Th
Page 93 and 94: “Maxi-Brake” Operation (single
Page 95 and 96: Park brake systems with double cont
Page 97 and 98: Park Brake Emergency Functions... 1
Page 99 and 100:
BC Transit - Air Brake Course 4. Ba
Page 101 and 102:
No. 6 LOW AIR WARNING DEVICE: activ
Page 103 and 104:
No. 8 RELAY VALVE: provides quicker
Page 105 and 106:
Review of Section Four 6) Why is it
Page 107 and 108:
BC Transit - Air Brake Course 5. Ot
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
ATC (Automatic Traction Control)
Page 117 and 118:
Long Stroke Push Rods Many new air
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Disc Brakes Callipers Rotor …oper
Page 121 and 122:
Wedge Brakes This type of brake use
Page 123 and 124:
Section Six Single Circuit Tractor
Page 125 and 126:
Parts of the Trailer (van style) 1)
Page 127 and 128:
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
Page 203 and 204:
Combination Truck and Trailer (mixe
Page 205 and 206:
Combination Truck and Trailer (Prim
Page 207 and 208:
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