Air brake system parts, working, diagram, principle. Filing systems have evolved over the years from filing paperwork in boxes to sophisticated software programs that store files electronically out of sight. Antilock braking system abs and antislip regulation asr. In the air dryer, the water vapour in the air is extracted and expelled. Compressed air supply the compressed air supplied by the compressor 1 flows to the air dryer 3 via the unloader 2 which automatically controls the pressure within the system within a range of between 7. A typical air brake system configuration for a heavy vehicle consists of service brakes, parking brakes, a control pedal and an air storage tank. It consists of air filter, unloading valve, air compressor, air reservoir, brake valve, and 4 numbers brake chamber. If the vehicle is equipped with a bendix adis air dryer system, a bendix drm dryer reservoir module, or a bendix ad9si air dryer, be sure to drain the purge reservoir. This helps the identification and troubleshooting process with less possibility for. Pdf is a hugely popular format for documents simply because it is independent of the hardware or application used to create that file.
The regulations provide for five primary types of brake system inspections. The slack adjuster is located on the air canister on t the slack adjuster is the part of an airbrake system that is used to adjust the bra. The heart of any air brake system is the compressor, compressor is the device which generates and in a way regulates the flow of compressed air in the system. The sr1 valve monitors the air pressure within the rear axle brake. New pneumatic radial tires for light vehicles standard no. Air tubing and fittings shown is the brake system as a schematic layout or the actual routing in the vehicle on a 4x2 and a 6x4 vehicle or the brake system valves and tubing in separate circuits. Allow the air pressure to stabilize for at least 1 minute. Before organizing your files in a new system, explore the different types available to determine which is the best match for your records. The endorsement a is not required when operating class 3 or 5 vehicles licensed as a farm truck, or trucks with air over hydraulic brakes. 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. Air brake system air brake system mvss requirements mvss compliance as manufactured by mack trucks, inc. The 3 axle air brake model 6430 trainer presents the real world operation and study of a 3 axle air brake system.
This article explains what pdfs are, how to open one, all the different ways. This booklet will cover the most common air brake system designs from 1975 to 2006. This noise comes from the governor cut out and the discharge from the air dryer. The air brake system is used in trucks, buses, trains, etc. Observe the dash gauge pressures for 2 minutes and note any pressure drop. Read on to find out just how to combine multiple pdf files on macos and windows 10. To check the free play of manual slack adjusters of scam brakes you should park on what kind of grade. In any case the main reservoir pressure must always be at least 15 lbs. Luckily, there are lots of free and paid tools that can compress a pdf file in just a few easy steps. They are the service brake system, the parking brake system, and what other. Compressed air is pushed through a cooling coil and into an air dryer.
Air brakes explained simply service, parking and emergency. The compressor is powered by the engine directly and uses the common lubricant available with the engine. This section covers air brake system parts dual air brake systems inspecting air brakes using air brakes there are many parts to an air brake system. As you read this handbook, remember it is only a guide. The warner air utility control interconnects with air brake systems of tow vehicles and automatically operates electric trailer brakes in sychronization with air brakes. The single check valve got its name from the fact that only one is used in the air brake system.
Automatic brakes work in concert with collision avoidance, adaptive cruise control, and other systems to make vehicles safer. Each commercial motor vehicle manufactured on or after october 20, 1994, and equipped with an air brake system, shall meet the automatic brake adjustment system requirements of federal motor vehicle safety standard no. This helps to reduce the risk of ice in air brake valves and other parts during cold weather. Air leaving the final stage of the compressor is still much hotter than the. Recently, bogie mounted brake system bmbs has also. Class i initial terminal inspection, class ia 1,000mile inspection, class ii. Air brake system of lhb coaches is most efficient and reliable braking system used to run long trains at high speeds. When the required air pressure in the air brake system is reached, the governor shuts off the air compressor, this is called a governor cut out. Although the overall air brake system in a train is complex, it nevertheless can be reduced to two main elements. As a result, the maintenance and requirements have changed considerably.
Parti air brake system of lhb coaches knorr bremse 6 1. Some air brake systems have an alcohol evaporator to put alcohol into the air system. In event that brake components such as air chambers or cam shafts are supported by weldments to the axle, it will be necessary to include onehalf of the axle or axle housing assembly as well. Fra regulations require the air brake systems of trains, and the air brakes of individual freight cars, to be inspected and tested in certain circumstances. Page 4 quality heavy duty parts contents page description number for williams control valves, use the six digit number for new valves and use the wm with a suffix for a remanufactured part number where applicable. Should there be any breach in the supplemental air connection, the air supply will be shut off. If a spring brake is leaking from the the spring brake to the service brake side, that air will travel back up the service line and out the exhaust of the next valve back. Any air hydraulic booster and hydraulic system necessary for proper operation must be utilized. Air compressor uses a certain amount of engine power. Air operated brakes this system is operated by air from a compressor off the engine.
The supply reservoir supplies air to the service reservoirs. Each vehicle and its air brake system may have features and components that are different from those described in this handbook. You may also operate a vehicle equipped with air brakes as a learner while accompanied by a person who has an endorsement a on their licence. Federal and canada motor vehicle safety standards mvss 106, brake hoses, and 121, air brake systems. Since the production and flow of air is so vital an element in train braking, it is necessary to understand some properties of air itself. It contains basic information about common air brake systems. Kevin cooleygetty images automatic braking technologies combine sensors and brake controls to help prevent highs. The adults, the kids and the family pets all need warmth when its freezing outside a. Air flow through a single check valve is in one direction only. Quick reference guide 2010 version to federal motor. The slack adjuster is the part of an airbrake system that is used to adjust the brakes when needed. A wellmaintained filing system allows vital information to be accessed quickly and saves a company m.
Start the bus and let the air pressure build to at least 90. The air pressure gauge tells you the adequacy of the air system. The program provides courseware for use by students and instructors. They are essential for an operating system to run normally. To combine pdf files into a single pdf document is easier than it looks. Ian waldie getty images a system file is any file with the system attribute turned on. If the vehicle is equipped with an adis air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. The rear brake chambers are a double diaphragm with two chambers that serve two different functions.
The figure shows the complete layout of the air brake system. Brakes apply too slowly brakes need adjusting or lubricating. 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. Air pressure is then required to release the parking brake and set the vehicle.
B rake a ctuating s y s tem s section l6 actuated power. This means it can be viewed across multiple devices, regardless of the underlying operating system. Under the normal condition, the lever action should feel stiff at this point. Installation adding shimano genuine mineral oil and bleeding air if the brake lever is then operated, air bubbles in the system. The parts of an air brake system georgia commercial drivers. Parking breaks in this configuration consist of a set of disc or drum brakes held in lock position by a spring mechanism. The study of this manual, together with practical instruction, is recommended for a driver who is preparing for the air brake examination. Automatic slack adjuster asa and air brake chamber. Whether you live in a mansion or a normal suburban home, the temperature is one of the main ways you make your place comfortable for those who live in it. Start the bus and let the air pressure build to at least 90 psi. Antilock braking system abs purpose antilock brake systems abs generally also referred to as antilock systems als are designed to prevent the vehicle wheels from locking as a result of the service brake being applied with too much force, especially on slippery road surfaces. Time trailer brakes are gradually applied at preset rates. Pdf file or convert a pdf file to docx, jpg, or other file format. Distribution stotement document available through the national technical information 5285 port royal road springfield, virginia 22161 ce 19.
Apr 28, 1989 air flow method, train air brakes, air flow meters, air flow indicators, brake system test 18. Youll see from the animations that all systems have. Automatic slack adjuster asa and air brake chamber failure. Hydraulic oil brake system is used for light vehicles such as cars, lightduty trucks, etc.
Licensing and safety division air brake endorsement examination. An oversized pdf file can be hard to send through email and may not upload onto certain file managers. You may also operate a vehicle equipped with air brakes as a learner while accompanied by. All color on tubing conforms to the standardized color scheme.
As shown in the figure, in the air brakes the compressed air around 700 kpa is used to actuate the brake mechanism. The brakes on your car are the same as air brakes, only the power source is different watch the video. Although you can choose a variety today, all filing systems share one main goal. Dc4 double check valve drain valve manual 3 gauge 2 spring brake. Advanced troubleshooting guide for air brake compressors. A minimum of three reservoirs are generally used in a dual air brake system. This video gives an introduction and brief look at air braking systems on heavy and commercial vehicles. The parts of an air brake system georgia commercial.
A pdf file is a portable document format file, developed by adobe systems. The air compressor pumps air into the air storage tanks reservoirs. The sr1 valve monitors the air pressure within the rear axle brake tank. Air brake system parts, working, diagram, principle, advantages.
The parts of these systems are discussed in greater detail below. By michelle rae uy 24 january 2020 knowing how to combine pdf files isnt reserved. Occupant protection in interior impact standard no. Quick reference guide 2010 version to federal motor vehicle. Air connections are also easy to control when connecting and separating vehicles todays systems use electronic. One is normal service brake operation as described above, the other is park brake or low air spring brake apply. Air force one is the only air brake system that supplies these components as part of the installation kit. Impact protection for the driver from the steering control system. Air compressor and air system pressureyou should be aware of common air pressure thresholds of your motorcoachs brake system. The double check valve maintains parking brake signal pressure, directs air pressure from either the drive axle or fronttag axle brake system whichever is higher, and provides signal pressure to operate the r12 relay valve located in the parking brake circuit. Locomotives brakes can be applied and released through independent brake valve sa9, independently.
The trainer is capable of duplicating actual onvehicle problems. When the system falls below approximately 60 psi, the brakes are automatically locked by springs and the bus becomes immobile. Brake actuating systems dexter parts brakes electric. If the work is being performed on the vehicles air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning any work on the vehicle. Once the bubbles stop appearing, depress the brake lever as far as it will go.
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