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Chapter 16
The document discusses key vehicle identification information needed by technicians, including the vehicle identification number (VIN), which provides details on the vehicle like the country of origin and year it was built. The VECI label under the hood and calibration codes provide additional technical specifications, while casting numbers identify engine parts. Emission standards vary by location but are important for technicians to understand to properly service vehicles.
Ch07 Basic Theoriesand Math Rev
This chapter covers basic theories and math related to automotive systems. It defines key concepts like the states of matter, forms of energy, and conversions between energy types. It also explains Newton's laws of motion and how forces affect vehicles. Formulas for volume, circumference, and engine displacement are provided. Torque and horsepower are defined, and hydraulic, thermal, and electrical principles are summarized.
Chapter 05
The document discusses ASE certification tests for automotive technicians. It describes the types of multiple choice questions on the tests, which cover areas like engine repair, brakes, electrical systems. It provides tips for preparing, like practicing sample tests, and test-taking, such as reading questions carefully and not changing answers. Technicians need two years of experience to earn certification and can retake tests if needed to achieve a passing score of around 60%.
Chapter 01
The document discusses the evolution of automobiles and their major components. It describes how vehicles have evolved from horse-drawn carriages with attached engines to fully enclosed steel bodies. The major components of a vehicle include the frame/chassis, suspension, braking, steering, powertrain, and electrical systems. It also outlines the evolution of engine designs from flathead to overhead camshaft configurations and lists common areas of automotive service.
Chapter 08
The document discusses various types of threaded and non-threaded fasteners used in vehicles. It describes bolts, nuts, washers, rivets, pins and other fasteners. It explains how to identify different fasteners based on size, material grade, and other markings. It provides guidance on proper use and installation of various fasteners.
Halderman ch096 lecture
The document discusses brake fluid, including its types, specifications, inspection, and testing. It describes the various DOT classifications of brake fluid (DOT 3, 4, 5, 5.1) and their characteristics such as boiling points. The document emphasizes that brake fluid absorbs moisture over time, so it should be changed regularly, such as every two years or 30,000 miles. When inspecting brake fluid, technicians should check the level, color, contamination using test strips or boiling point testers. Brake fluid should not be mixed and the type used must follow manufacturer specifications.
Ch16
After studying Chapter 16, readers should be able to prepare for an ASE certification test on fuel, air, and exhaust systems. The chapter describes the purpose and components of the fuel delivery system, including the fuel tank, lines, filters, and electric fuel pump. It also provides instructions for testing the fuel pump pressure, volume, and for diagnosing leaks in the system.
Chapter 14
The document discusses key concepts for working with decimals, percentages, scientific notation, fractions, and ratios that are important for automotive technicians. It defines decimals, percentages, and scientific notation, and how to add and subtract decimals. It also explains how to determine gear ratios by dividing the number of teeth on driven and drive gears, and defines direct drive, gear reduction, and overdrive ratios. Finally, it discusses how to read and interpret graphs, charts, diagrams, and formulas that are commonly used in automotive service manuals.
Recommended
Chapter 16
The document discusses key vehicle identification information needed by technicians, including the vehicle identification number (VIN), which provides details on the vehicle like the country of origin and year it was built. The VECI label under the hood and calibration codes provide additional technical specifications, while casting numbers identify engine parts. Emission standards vary by location but are important for technicians to understand to properly service vehicles.
Ch07 Basic Theoriesand Math Rev
This chapter covers basic theories and math related to automotive systems. It defines key concepts like the states of matter, forms of energy, and conversions between energy types. It also explains Newton's laws of motion and how forces affect vehicles. Formulas for volume, circumference, and engine displacement are provided. Torque and horsepower are defined, and hydraulic, thermal, and electrical principles are summarized.
Chapter 05
The document discusses ASE certification tests for automotive technicians. It describes the types of multiple choice questions on the tests, which cover areas like engine repair, brakes, electrical systems. It provides tips for preparing, like practicing sample tests, and test-taking, such as reading questions carefully and not changing answers. Technicians need two years of experience to earn certification and can retake tests if needed to achieve a passing score of around 60%.
Chapter 01
The document discusses the evolution of automobiles and their major components. It describes how vehicles have evolved from horse-drawn carriages with attached engines to fully enclosed steel bodies. The major components of a vehicle include the frame/chassis, suspension, braking, steering, powertrain, and electrical systems. It also outlines the evolution of engine designs from flathead to overhead camshaft configurations and lists common areas of automotive service.
Chapter 08
The document discusses various types of threaded and non-threaded fasteners used in vehicles. It describes bolts, nuts, washers, rivets, pins and other fasteners. It explains how to identify different fasteners based on size, material grade, and other markings. It provides guidance on proper use and installation of various fasteners.
Halderman ch096 lecture
The document discusses brake fluid, including its types, specifications, inspection, and testing. It describes the various DOT classifications of brake fluid (DOT 3, 4, 5, 5.1) and their characteristics such as boiling points. The document emphasizes that brake fluid absorbs moisture over time, so it should be changed regularly, such as every two years or 30,000 miles. When inspecting brake fluid, technicians should check the level, color, contamination using test strips or boiling point testers. Brake fluid should not be mixed and the type used must follow manufacturer specifications.
Ch16
After studying Chapter 16, readers should be able to prepare for an ASE certification test on fuel, air, and exhaust systems. The chapter describes the purpose and components of the fuel delivery system, including the fuel tank, lines, filters, and electric fuel pump. It also provides instructions for testing the fuel pump pressure, volume, and for diagnosing leaks in the system.
Chapter 14
The document discusses key concepts for working with decimals, percentages, scientific notation, fractions, and ratios that are important for automotive technicians. It defines decimals, percentages, and scientific notation, and how to add and subtract decimals. It also explains how to determine gear ratios by dividing the number of teeth on driven and drive gears, and defines direct drive, gear reduction, and overdrive ratios. Finally, it discusses how to read and interpret graphs, charts, diagrams, and formulas that are commonly used in automotive service manuals.
Chap95
The document discusses gear ratios and types of gears used in manual transmissions. It explains how gear ratios allow the engine to operate at optimal speeds through different vehicle speeds. Synchronizers are described which allow smooth shifting between gears. Key terms are provided related to transmission components and gearing.
Halderman ch026 lecture
The document provides information on diagnosing engine conditions through visual inspections, noise diagnosis, and performance tests. It describes how to perform compression tests, cylinder leakage tests, vacuum tests, and check for exhaust restrictions. Key steps are outlined for each test, including what to check, how to set up the test, and how to interpret the results. Common engine complaints and their potential causes are also listed. The overall document serves as a guide for technicians on diagnosing engine issues through various inspection and testing methods.
Chap96
The document discusses drive shafts, U-joints, and CV joints used in vehicle suspension and steering systems. It defines key parts like the driveshaft, U-joints, and CV joints. It describes how U-joints and CV joints work, the different types of each, and their functions in transferring power from the transmission to the wheels while allowing for suspension movement. The document also discusses driveshaft design, balancing, and materials as well as factors that affect vibration.
Chapter 25
The document discusses procedures for disassembling and cleaning an engine. It describes how to remove components like the cylinder heads, pistons, crankshaft, timing chain and camshaft. It also explains different cleaning methods, including mechanical cleaning using scrapers and brushes, and chemical cleaning using solvent-based or water-based solutions in spray washers or soak tanks. Safety precautions are highlighted for different cleaning chemicals and components.
Halderman ch043 lecture
The document discusses the use of oscilloscopes and graphing multimeters to measure voltage signals. It describes the different types of oscilloscopes including analog and digital storage oscilloscopes. It explains important oscilloscope settings like time base, volts per division, triggers, and the number of channels. It also discusses measuring pulse trains, AC and DC coupling, and using oscilloscopes and graphing multimeters.
Chapter 57
The document provides instructions for checking for spark in an ignition system as the first step in troubleshooting a no-start condition. It describes using a spark tester to check for spark by cranking the engine and looking for a blue spark. It then discusses inspecting ignition system components and lists steps for testing the ignition coil, pickup coil, magnetic and optical sensors using an ohmmeter or oscilloscope. Safety procedures are outlined for grounding the coil wire when performing engine tests.
Ch11
The document provides guidance on inspecting and testing various components of the ignition system, including the ignition coil, pickup coil, distributor cap, rotor, spark plug wires, and spark plugs. It describes procedures for checking for spark, testing coil resistance, and using an oscilloscope to examine current waveforms. Visual inspections of components and tests, such as grounding cylinders one at a time, are recommended to diagnose ignition issues causing no start or running problems.
Chapter 62
The document provides information about emission control systems, specifically exhaust gas recirculation (EGR) systems. It describes the purpose of EGR systems to reduce nitrogen oxide emissions by recirculating a portion of exhaust gases into the intake manifold. This lowers combustion temperatures. It explains positive and negative backpressure EGR valves and computer-controlled EGR systems using solenoids. It also discusses EGR valve position sensors that provide feedback to the computer on valve operation.
Halderman ch022 lecture
The document discusses various aspects of engine oil, including:
1) It describes common engine oil specifications like SAE, API, ILSAC, and European/ACEA ratings which indicate viscosity and performance standards.
2) It explains additives that engine oils contain to improve properties like viscosity and protection against heat, wear, and corrosion.
3) It notes that vehicle manufacturers often specify unique oil standards and it's important to use the specification required by your owner's manual.
Our Worm House
Room 3 collected worms and supplies to build a worm house. They gathered worms, a plastic cup, sand, soil, food, a lid, and black paper to create a home for their wriggly, squiggly worms.
Halderman ch103 lecture
The document discusses parking brake operation, diagnosis, and service. It describes how parking brakes work on rear drum and disc brake systems. Parking brakes are activated through foot pedals, levers, or handles using cables or rods. The document explains different types of parking brake mechanisms for drum brakes, rear disc auxiliary drum brakes, and caliper-actuated disc parking brakes. Adjustment and service procedures are also covered.
Halderman ch054 lecture
The document discusses the operation of alternators and charging systems. It describes how alternators use electromagnetic induction to generate current from mechanical rotation of the rotor. Alternators produce alternating current that is converted to direct current by diodes for battery charging. A voltage regulator controls the field current to maintain the proper charging voltage. Modern computer-controlled systems can vary the alternator output to match electrical demands.
Chapter 14
The document discusses key concepts for working with decimals, percentages, scientific notation, fractions, and ratios that are important for automotive service technicians. It defines decimals, percentages, and scientific notation, and how to add and subtract decimals. It also explains how to determine gear ratios by dividing the number of teeth on driven and drive gears. Graphs, charts, and diagrams are discussed as tools for interpreting specifications and part arrangements.
Chapter 16
The document discusses key vehicle identification information needed by technicians, including the vehicle identification number (VIN), which provides details on the vehicle like the country of origin and year it was built. The VECI label under the hood and calibration codes provide additional technical specifications. Casting numbers identify engine parts and the vehicle's emissions rating and federal bin number indicate its emissions standards compliance. Together this identification information is important for technicians to properly service and repair vehicles.
Chapter 17
The document provides instructions for performing routine vehicle maintenance tasks such as changing engine oil, inspecting and replacing brake fluid, checking fluid levels, and replacing air and cabin filters. It describes the proper procedures and safety precautions for each task and defines important related terms.
Chapter 64
The document discusses different types of hybrid electric vehicles including their components and operation. It describes series, parallel, and series-parallel hybrid designs and how they are able to improve fuel economy over conventional vehicles. The advantages and disadvantages of each hybrid design are explained as well as different levels of hybridization from mild to full hybrids.
Chapter 15
The document discusses various types of service information that can help technicians with vehicle repairs, including:
- Vehicle history records which may provide clues to current problems related to past repairs.
- Owner's manuals which include specifications, fluid capacities, maintenance schedules, and how to reset systems.
- Lubrication guides which specify oil types and capacities.
- Factory service manuals and electronic services with detailed vehicle-specific information.
- Other types like labor guides, diagrams, component locators, and specialty manuals.
- Hotline services that provide experienced technicians and resources to assist with repairs.
Chapter 48
The document provides information about heating and air conditioning systems, including:
1. It describes the basic refrigeration cycle that occurs in air conditioning systems, involving evaporation and condensation of refrigerant in the evaporator and condenser.
2. It explains how a heating system works by circulating hot coolant from the engine through a heater core to heat the interior of the vehicle.
3. It discusses the environmental impact of refrigerants like CFC-12 and its replacement, HFC-134a, on the ozone layer.
Halderman ch107 lecture
The document discusses ABS diagnosis and repair procedures. It outlines the steps to diagnose an ABS problem which include verifying the customer concern, performing a visual inspection, checking for diagnostic trouble codes, completing the repair, and verifying the repair. It also discusses retrieving and clearing diagnostic trouble codes, diagnosing wheel speed sensors, and using scan tools for OBD-II ABS diagnosis.
Chapter 09
The document discusses different types of hand tools used in automotive service, including wrenches, sockets and ratchets, screwdrivers, hammers, pliers, and how to safely use and maintain them. It explains the differences between open-end, box-end, and combination wrenches, as well as adjustable wrenches, line wrenches, and torque wrenches. The document also covers sockets, extensions, screwdriver types including offset and impact, hammers and mallets, and common pliers.
Chap70
The document provides information about various components in hydraulic brake systems, including:
1) A residual check valve keeps slight pressure in the system to prevent air leaks, while proportioning valves limit rear brake pressure to improve balance during hard stops.
2) A pressure-differential switch lights the brake warning light if pressure is lost in one circuit, while a brake fluid sensor does the same for low fluid level.
3) Common valves like metering valves and electronic proportioning systems work to properly time and balance brake pressure between the front and rear.
Chap71
The document discusses brake fluid types and specifications. It explains that brake fluid is made from polyglycol and comes in different DOT classifications (DOT 3, DOT 4, DOT 5, DOT 5.1) with varying characteristics like moisture absorption and boiling points. DOT 3 is most commonly used but DOT 4 provides better protection against corrosion. DOT 5 is silicone-based and doesn't absorb water. The document emphasizes the importance of changing brake fluid regularly to prevent issues from low boiling points caused by absorbed moisture.
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Chap95
The document discusses gear ratios and types of gears used in manual transmissions. It explains how gear ratios allow the engine to operate at optimal speeds through different vehicle speeds. Synchronizers are described which allow smooth shifting between gears. Key terms are provided related to transmission components and gearing.
Halderman ch026 lecture
The document provides information on diagnosing engine conditions through visual inspections, noise diagnosis, and performance tests. It describes how to perform compression tests, cylinder leakage tests, vacuum tests, and check for exhaust restrictions. Key steps are outlined for each test, including what to check, how to set up the test, and how to interpret the results. Common engine complaints and their potential causes are also listed. The overall document serves as a guide for technicians on diagnosing engine issues through various inspection and testing methods.
Chap96
The document discusses drive shafts, U-joints, and CV joints used in vehicle suspension and steering systems. It defines key parts like the driveshaft, U-joints, and CV joints. It describes how U-joints and CV joints work, the different types of each, and their functions in transferring power from the transmission to the wheels while allowing for suspension movement. The document also discusses driveshaft design, balancing, and materials as well as factors that affect vibration.
Chapter 25
The document discusses procedures for disassembling and cleaning an engine. It describes how to remove components like the cylinder heads, pistons, crankshaft, timing chain and camshaft. It also explains different cleaning methods, including mechanical cleaning using scrapers and brushes, and chemical cleaning using solvent-based or water-based solutions in spray washers or soak tanks. Safety precautions are highlighted for different cleaning chemicals and components.
Halderman ch043 lecture
The document discusses the use of oscilloscopes and graphing multimeters to measure voltage signals. It describes the different types of oscilloscopes including analog and digital storage oscilloscopes. It explains important oscilloscope settings like time base, volts per division, triggers, and the number of channels. It also discusses measuring pulse trains, AC and DC coupling, and using oscilloscopes and graphing multimeters.
Chapter 57
The document provides instructions for checking for spark in an ignition system as the first step in troubleshooting a no-start condition. It describes using a spark tester to check for spark by cranking the engine and looking for a blue spark. It then discusses inspecting ignition system components and lists steps for testing the ignition coil, pickup coil, magnetic and optical sensors using an ohmmeter or oscilloscope. Safety procedures are outlined for grounding the coil wire when performing engine tests.
Ch11
The document provides guidance on inspecting and testing various components of the ignition system, including the ignition coil, pickup coil, distributor cap, rotor, spark plug wires, and spark plugs. It describes procedures for checking for spark, testing coil resistance, and using an oscilloscope to examine current waveforms. Visual inspections of components and tests, such as grounding cylinders one at a time, are recommended to diagnose ignition issues causing no start or running problems.
Chapter 62
The document provides information about emission control systems, specifically exhaust gas recirculation (EGR) systems. It describes the purpose of EGR systems to reduce nitrogen oxide emissions by recirculating a portion of exhaust gases into the intake manifold. This lowers combustion temperatures. It explains positive and negative backpressure EGR valves and computer-controlled EGR systems using solenoids. It also discusses EGR valve position sensors that provide feedback to the computer on valve operation.
Halderman ch022 lecture
The document discusses various aspects of engine oil, including:
1) It describes common engine oil specifications like SAE, API, ILSAC, and European/ACEA ratings which indicate viscosity and performance standards.
2) It explains additives that engine oils contain to improve properties like viscosity and protection against heat, wear, and corrosion.
3) It notes that vehicle manufacturers often specify unique oil standards and it's important to use the specification required by your owner's manual.
Our Worm House
Room 3 collected worms and supplies to build a worm house. They gathered worms, a plastic cup, sand, soil, food, a lid, and black paper to create a home for their wriggly, squiggly worms.
Halderman ch103 lecture
The document discusses parking brake operation, diagnosis, and service. It describes how parking brakes work on rear drum and disc brake systems. Parking brakes are activated through foot pedals, levers, or handles using cables or rods. The document explains different types of parking brake mechanisms for drum brakes, rear disc auxiliary drum brakes, and caliper-actuated disc parking brakes. Adjustment and service procedures are also covered.
Halderman ch054 lecture
The document discusses the operation of alternators and charging systems. It describes how alternators use electromagnetic induction to generate current from mechanical rotation of the rotor. Alternators produce alternating current that is converted to direct current by diodes for battery charging. A voltage regulator controls the field current to maintain the proper charging voltage. Modern computer-controlled systems can vary the alternator output to match electrical demands.
Chapter 14
The document discusses key concepts for working with decimals, percentages, scientific notation, fractions, and ratios that are important for automotive service technicians. It defines decimals, percentages, and scientific notation, and how to add and subtract decimals. It also explains how to determine gear ratios by dividing the number of teeth on driven and drive gears. Graphs, charts, and diagrams are discussed as tools for interpreting specifications and part arrangements.
Chapter 16
The document discusses key vehicle identification information needed by technicians, including the vehicle identification number (VIN), which provides details on the vehicle like the country of origin and year it was built. The VECI label under the hood and calibration codes provide additional technical specifications. Casting numbers identify engine parts and the vehicle's emissions rating and federal bin number indicate its emissions standards compliance. Together this identification information is important for technicians to properly service and repair vehicles.
Chapter 17
The document provides instructions for performing routine vehicle maintenance tasks such as changing engine oil, inspecting and replacing brake fluid, checking fluid levels, and replacing air and cabin filters. It describes the proper procedures and safety precautions for each task and defines important related terms.
Chapter 64
The document discusses different types of hybrid electric vehicles including their components and operation. It describes series, parallel, and series-parallel hybrid designs and how they are able to improve fuel economy over conventional vehicles. The advantages and disadvantages of each hybrid design are explained as well as different levels of hybridization from mild to full hybrids.
Chapter 15
The document discusses various types of service information that can help technicians with vehicle repairs, including:
- Vehicle history records which may provide clues to current problems related to past repairs.
- Owner's manuals which include specifications, fluid capacities, maintenance schedules, and how to reset systems.
- Lubrication guides which specify oil types and capacities.
- Factory service manuals and electronic services with detailed vehicle-specific information.
- Other types like labor guides, diagrams, component locators, and specialty manuals.
- Hotline services that provide experienced technicians and resources to assist with repairs.
Chapter 48
The document provides information about heating and air conditioning systems, including:
1. It describes the basic refrigeration cycle that occurs in air conditioning systems, involving evaporation and condensation of refrigerant in the evaporator and condenser.
2. It explains how a heating system works by circulating hot coolant from the engine through a heater core to heat the interior of the vehicle.
3. It discusses the environmental impact of refrigerants like CFC-12 and its replacement, HFC-134a, on the ozone layer.
Halderman ch107 lecture
The document discusses ABS diagnosis and repair procedures. It outlines the steps to diagnose an ABS problem which include verifying the customer concern, performing a visual inspection, checking for diagnostic trouble codes, completing the repair, and verifying the repair. It also discusses retrieving and clearing diagnostic trouble codes, diagnosing wheel speed sensors, and using scan tools for OBD-II ABS diagnosis.
Chapter 09
The document discusses different types of hand tools used in automotive service, including wrenches, sockets and ratchets, screwdrivers, hammers, pliers, and how to safely use and maintain them. It explains the differences between open-end, box-end, and combination wrenches, as well as adjustable wrenches, line wrenches, and torque wrenches. The document also covers sockets, extensions, screwdriver types including offset and impact, hammers and mallets, and common pliers.
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Chap70
The document provides information about various components in hydraulic brake systems, including:
1) A residual check valve keeps slight pressure in the system to prevent air leaks, while proportioning valves limit rear brake pressure to improve balance during hard stops.
2) A pressure-differential switch lights the brake warning light if pressure is lost in one circuit, while a brake fluid sensor does the same for low fluid level.
3) Common valves like metering valves and electronic proportioning systems work to properly time and balance brake pressure between the front and rear.
Chap71
The document discusses brake fluid types and specifications. It explains that brake fluid is made from polyglycol and comes in different DOT classifications (DOT 3, DOT 4, DOT 5, DOT 5.1) with varying characteristics like moisture absorption and boiling points. DOT 3 is most commonly used but DOT 4 provides better protection against corrosion. DOT 5 is silicone-based and doesn't absorb water. The document emphasizes the importance of changing brake fluid regularly to prevent issues from low boiling points caused by absorbed moisture.
Chap72
The document provides instructions for bench bleeding a master cylinder and describes the proper brake bleeding sequence. It discusses various brake bleeding methods including manual bleeding, gravity bleeding, and pressure bleeding. Key terms related to brake bleeding such as bleeder valve, brake bleeding, and surge bleeding are defined. The bleeding sequence of starting with the rear wheel farthest from the master cylinder and working inward is described. Methods for loosening stuck bleeder valves like using an impact wrench or applying heat are also outlined.
Chap73
The document discusses wheel bearings, including the types of antifriction bearings used in automotive applications and their components. It describes ball bearings, roller bearings, tapered roller bearings, and sealed front wheel drive bearings. It also covers bearing inspection procedures, greases used for lubrication, and seals used to prevent lubricant leakage and contamination.
Chap74
The document provides information about drum brake components and operation for an ASE certification exam. It discusses drum brake parts like the backing plate, shoes, anchors, and wheel cylinders. It explains how drum brakes work, including self-energizing action and servo brakes. It also outlines advantages like use as parking brakes, and disadvantages such as susceptibility to brake fade from heat.
Chap75
The document discusses drum brake diagnosis and repair procedures. It describes removing the brake drum, inspecting components like the backing plate and brake linings, and overhauling the wheel cylinders. The key steps are removing the drum, inspecting parts for wear, lubricating contact surfaces on the backing plate, and replacing worn springs and hardware.
Chap76
The document provides information about disc brake systems, including:
1) Disc brakes use pistons to squeeze brake pads against a rotating disc brake rotor to stop the wheel. Disc brakes have advantages over drum brakes like better resistance to fade.
2) The main parts of a disc brake system are the caliper, brake pads, rotor, and splash shield. Disc brake pads contain a friction material bonded or riveted to a steel backing plate and may have wear indicators.
3) While disc brakes perform better than drum brakes, they also have some disadvantages like producing more brake dust and less self-energizing than drum brakes.
Chap77
The document provides instructions for visually inspecting and servicing disc brake calipers. It describes how to disassemble a caliper, check components for wear, clean and lubricate parts, and reassemble the caliper. Key steps include removing the caliper, inspecting pads and pistons, cleaning the caliper bore, replacing seals, lubricating with brake fluid, and reinstalling the caliper. Common issues like worn caliper mounts and stuck pistons are also discussed.
Chap78
The document provides information about parking brake systems, including:
- Parking brakes are required to hold a vehicle stationary on a 20% grade and can use drum or disc brake systems.
- Drum parking brakes typically use a lever and strut to apply both shoes, while disc systems may use the caliper.
- Linkages include cables, rods, levers, and equalizers to evenly apply force to both sides.
- Systems must be properly adjusted and inspected for wear like swollen cables.
Chap80
The document provides information about vacuum brake boosters, including:
- Vacuum brake boosters use engine intake manifold vacuum and pressure differential to multiply brake pedal force applied by the driver.
- They contain one or two rubber diaphragms connected to the brake pedal and master cylinder. Opening an atmospheric valve allows air pressure to assist braking.
- Vacuum boosters are tested by depleting vacuum stored in the booster and ensuring the brake pedal drops when the engine is restarted, indicating restored vacuum power assist.
Chap81
The document discusses antilock braking systems (ABS) and their components and functions. It explains that ABS uses wheel speed sensors and electrohydraulic components to monitor wheel slippage and modulate brake pressure to prevent locking and maintain vehicle control during braking. It describes different ABS configurations including four-channel, three-channel, and single-channel systems and how they control braking for different wheels. The purpose of ABS is to allow braking and steering control under slippery conditions.
Chap82
The document provides information to prepare for an ASE Brakes certification test, including describing normal ABS dash lamp operation, visually inspecting ABS systems, retrieving trouble codes, clearing trouble codes, bleeding ABS, and diagnosing ABS-equipped vehicles. It discusses the operation of brake warning lamps, performing diagnostic procedures, diagnosing common ABS components like wheel speed sensors, and investigating various ABS systems from manufacturers like Bosch, Teves, and Delphi.
Halderman ch108 lecture
The document discusses electronic stability control (ESC) systems. ESC uses sensors and individual wheel braking to help drivers maintain control of their vehicle during maneuvers like sharp turns or on slippery roads. It works by applying brakes when it detects loss of traction or if the vehicle is not following the driver's intended path. Traction control is similar but focuses on preventing wheel spin during acceleration. Both systems use wheel speed, steering, lateral acceleration and yaw rate sensors along with anti-lock braking to keep the vehicle stable.
Halderman ch106 lecture
The document discusses the components and operation of antilock braking systems (ABS). ABS uses wheel speed sensors to monitor wheel slippage and an electronic controller to modulate brake pressure and prevent wheel lockup. It controls wheel slippage through electrohydraulic units to maintain optimal tire traction and braking force. The document describes various ABS configurations, components, functions, and limitations to provide maximum vehicle control and stopping power.
Halderman ch105 lecture
The document discusses vacuum brake boosters, including how they operate and can be tested. It describes the key components of a vacuum booster like the diaphragm, control valve, and check valve. It explains how vacuum from the intake manifold is used to multiply brake pedal force. Tests are outlined to check for booster leaks and proper operation. Adjustment of the pushrod between the booster and master cylinder is also covered.
Halderman ch101 lecture
This document provides an overview of disc brake systems, including:
- The main components of disc brakes and how they function to stop rotation of the brake disc.
- Different types of disc brake caliper designs, including fixed, floating, and sliding calipers.
- Construction and operation of brake pads, rotors, and other disc brake parts.
- Techniques for diagnosing and repairing disc brake systems.
Halderman ch099 lecture
The document discusses drum brakes, including their components, operation, advantages, and disadvantages. It describes drum brake parts such as the backing plate, shoe anchors, wheel cylinders, brake shoes, and linings. It explains the differences between primary and secondary brake shoes and how drum brakes use self-energizing and servo action to provide stopping power. The document also discusses drum brake fade issues and methods for adjusting drum brakes.
Halderman ch097 lecture
The document discusses various methods for bleeding hydraulic brake systems, including:
- Bench bleeding the master cylinder before installation
- Bleeding the master cylinder on the vehicle by opening the bleeder screw while slowly pumping the brake pedal
- Methods for loosening stuck bleeder valves such as tapping with a hammer or using heat
- The proper brake bleeding sequence from farthest to closest wheel cylinder
- The manual bleeding procedure using an assistant and clear tubing to see air bubbles
- Vacuum bleeding which uses suction to bleed the system with one technician
Halderman ch092 lecture
The document discusses the components and performance standards of braking systems. It describes the purpose of brakes, lists common brake parts for disc and drum brakes, and discusses the six categories that brake system components are classified into. It also summarizes federal braking standards that are intended to ensure safe braking performance.
Halderman ch095 lecture
The document discusses various hydraulic valves and switches used in brake systems, including their purposes and operations. It describes residual check valves, pressure-differential switches, brake fluid level switches, proportioning valves, electronic brake proportioning, and metering valves. Proportioning valves control brake pressure to balance braking between the front and rear. Metering valves delay front brake application until sufficient rear brake pressure is achieved.