How to determine air brake adjustmentappliedpry bar. The study of this manual, together with practical instruction, is recommended for a driver who is preparing for the air brake examination. Components are introduced and shown with typical system diagrams to show where they are used. Brake system diagram tapered wear a gradual slope of the pad material creating uneven thickness on either end of the pad. When air is cooled, some of the water vapor it holds will condense. Your written air brake knowledge test can also be scheduled. During the normal operation of the brake system each port, pas sage, valve, etc.
Therefore, the air air brake system of the towing vehicle must be in good condition. A trailer system has many of the components found on a truck system. Worn rubber caliper bushings worn caliper slide rails improper lubrication more pad less pad uneven wear one side of the pad set has significantly less unused friction material than the other. The guide consists of an introduction to air brake charging system components, a table showing recommended vehicle maintenance schedules, and a troubleshooting symptom and remedy section with tests to diagnose most charging system problems. Air brake diagram this air brake diagram outlines how air brakes work. Air brake system diagram free download as pdf file. The air leaving the compressor enters a cooling coil and then the no. The parts of an air brake system georgia commercial drivers. The components of an air brake system 12 compressor and governor 12 reservoirs 14 air dryer 15 safety valve 16 foot valve 16 brake chambers, slack adjusters and brake lining 16 wedge brakes 20 disc brakes 21 air overhydraulic brake systems 21 section summary questions 24. Supply system, service brake system, emergency and parking brake systems and trailer system. Tractortrailer air brake systems to understand the basics of tractortrailer air brake systems, its best to start with the trailer. Reading air brake diagrams tp2006 september 2001 4 part i.
Wheels section b brake assemblies and components hydraulic brake system master cylinder brake booster clutch brake pedals section c steering components. The air compressor pumps air into the air storage tanks reservoirs. They can react badly with each other and corrode the brake system. Parts of an air brake diagram the design of any air brake valve is more easily understood by recognizing some major components and parts. The study of this manual, along with practical instruction, is recommended to persons who ar e p r eparing for the completion of the air brake. The wrapper chain hooked directly to a separate brake beam independent of the air brake system. Some air brake systems have an alcohol evaporator to put alcohol into the air system.
Pdf a diagnostic system for air brakes in commercial vehicles. This helps to reduce the risk of ice in air brake valves and other parts during cold weather. This new diagram system provides all possible connections that are available on one single diagram. This type of air brake system is commonly used in heavy vehicles such as buses, trucks, etc. Vehicles with active brake systems include several hybrid vehicles, such as the ford escape hybrid and. Wedge type brakes may be selfadjusting or may require manual adjustment. Air brake systems are widely used in commercial vehicles such as trucks. Section 5 air brakes page 1 section 5 air brakes this section covers air brake system parts dual air brake systems inspecting air brakes using air brakes this section tells you about air brakes. The air system worked on all four axles and the hand brake worked on a single truck 2 axles. Brake chambers and slack adjusters to transfer the force. From unloader valve air enter brake chamber through brake.
The cooling effect of the coil and the reservoir itself will remove about. Control or service lines are commonly associated with the blue air line function of the air system. Spring brake chamber adb22x disc brake typical truck system schematic typical tractor system schematic air brake system troubleshooting. Pdf a diagnostic system for air brakes in commercial. Diagrams and schematics index section a frontrear axle assemblies and. I had a diagram for a hopper bottom gon that had k brakes on both ends with a vertical staff only on the b end. A diagnostic system for air brakes in commercial vehicles article pdf available in ieee transactions on intelligent transportation systems 73.
In airoperated disc brakes, air pressure acts on a brake chamber and. Air system piping diagrams pre121 trailer air systems. Each device shown includes a description of operation, a schematic showing the device in a typical system as well as the din representation of the device. Antilock brake system abs above abv air conditioning ac alternating current ac access acc accelerator accel. Freightliner air brake system diagram travel trailer battery hookup diagram tractor air brake system of freightliner freightliner air brake system diagram. The parts of an air brake system georgia commercial. Pdf the mathematical model governing the response of the relay valve in an air. Note, not all valves have all the components shown and described in this booklet. Control or service line the air lines in the trailer air brake system that perform the normal braking of the vehicle from the tractor foot valve or hand valve. Basic air brake system schematics total truck parts. Air brake systems are used on large commercial vehicles because they can develop and transmit high mechanical forces over great distances using simple components and connections. Visit howstuffworks to check out this great air brake diagram. The 26l brake equipment is a combination automatic and independent locomotive brake of modern design which incorporates all of the operating features necessary for the control of freight and passenger train braking systems. Air brake system air brake system mvss requirements mvss compliance as manufactured by mack trucks, inc.
I have a m2 freightliner that just started yesterday driving down the now, are the amus in. These diagrams are provided for basic identification only. From unloader valve air enter brake chamber through brake valve. None of the different types of brake fluids should be mixed. In this also when the brake pedal is pressed, air to atmosphere enters the compressor through the air filter to the reservoir through unloader value. If you want to drive a truck or bus with air brakes, or pull a trailer with air brakes, you need to read this section.
Pdf a model of the relay valve used in an air brake system. A large illustration of a complete dual air brake system is located on the inside cover and can be folded out and referred to when studying this manual. The air lines are not coloured coded except the service and supply lines that. Air conditioning related interior components section g. Ice inside the system can make the brakes stop working. The air lines direct compressed air through the air brake system. The air brake system of a trailer is entirely dependent upon the air brake system of the towing vehicle for its air supply and control. The control system is on the downside of an operating valve. Check the alcohol container and fill up as necessary, every day during cold weather. Typical electric brake wiring diagram dexter parts. What valve is used to protect the primary circuit from the secondary circuit. The five main components of an elementary air brake system and their purposes are the compressor, reservoir, foot valve, brake chambers, and brake shoes. View and download honda gl1800 service manual online.
Air brake system diagram anti lock braking system valve scribd. Electrical systems guide motorhome chassis americas choice for performance. A foot valve to regulate the flow of compressed air from the reservoir when it is needed for braking. Federal and canada motor vehicle safety standards mvss 106, brake hoses, and 121, air brake systems. This equip ment employs as the major components a 26c brake valve, a 26f. Install an accurate shop standard pressure gauge in the secondary service reservoir. Piston the piston is the heart of the control valve. The air compressor is connected to the engine through gears or a vbelt. In a dual air brake system, will the vehicle continue to have braking ability if one circuit fails. Data code 148035 provides a fast idle switch interface tied to the parking brake see schematics on page 1b11. When youre ready to book your written air brake knowledge test or practical air brake demonstration you can call 1844tlk2sgi 18448552744, press two at the prompt or request the exam office, have them book it and pay for it then by credit card. Bendix commercial vehicle systems document library.
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