Correct answer C-Brinelling is defined as indentations in the race caused by impact loads or vibrations. Doesnt seem real plausable to me but I'm running out of other ideas and parts to replace. However, it can also be due to fluid loss or a low fluid level. They can also cause you to use more fuel. A possible cause of this leakage might be: Correct answer C-A defective hose would not allow the fluid to enter the engine. An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. Correct answer D-The leak must be repaired before the linings are replaced. The star adjuster should be adjusted until there is a slight drag on the drum. d. Air in the hydraulic system. Contact. Replace them if you see that they have oil, fluid or grease on them. On a car with a drum/disc system, the front brakes lock up on light pedal application. Tech A states that in the Traction Control System, the control unit can independently apply individual brake units even though the driver is not stepping down on the brake pedal. Every rotor has a "minimum spec" for thickness, usually stamped on the rotor near the hub where the lug nuts are. In the following questions, "initial" refers to values before the collisions, and "final" refers to values after the collision. The master cylinder, where it attaches to the brake pedal. Then you should try the brakes. Who is right? The power booster uses engine vacuum to assist your leg when applying the brakes, and is nearly universal in modern cars. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. c. Parking brake out of adjustment How to Adjust Drum Brakes | YourMechanic Advice You can also verify it by looking at the direction on the scan tool data list. Correct answer D-Air causes a gap in the hydraulic fluid flow because the fluid has to compress the air before it can apply the piston. Question: The brakes on my 2010 Lexus ES brakes kick back when turning the steering wheel. Residual valves are used to maintain constant pressure on the brake system. It can also be the result in worn disc brake pads. a. If you have this type of rear braking system, it is almost impossible to isolate the rear brakes. This heat can be caused by a dragging brake unit. While these are the most common causes of brake issues on your Chevy, you should never allow your brakes to go bad. c. Leakage past the master cylinder cups d. Steering gear problem. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. Troubleshooting: Common Brake Issues and Causes Correct answer B-If the amber light is on it indicates an ABS fault and the system will revert to regular brake operation without ABS. To further reduce the noise, do not machine the rotor more than needed. This site is owned/ operated by an authorized GM Genuine Parts/ACDelco Seller. d. Neither A nor B. Brakes Dragging | The Causes of Brake Drag Explained A. D. Low brake fluid. Correct answer B-If the amber light is on, it indicates that there is an ABS fault. Which of the following would NOT cause a disc break to drag? They can also cause you to use . Frozen caliper piston Question: My car won't start unless I press really hard on the brakes. If you have rear disc brakes, this procedure may not work because some makes and models have a separate emergency brake, which is connected not to the rear rotor and caliper, but to a special drum inside the rear rotors with a separate braking system. A only If the drum is machined beyond its limit, the contact surface moves further from the shoes. d. Neither A nor B. To further reduce noise, do not machine a disc brake rotor more than absolutely necessary. Al+ClX2AlClX3. a. a. Typically rusted rotors or drums only happen when a car has been sitting for a long period. Correct answer A-Air in the hydraulic system is the only choice that creates a spongy pedal. We and our partners use cookies to Store and/or access information on a device. Step 2: Adjust the star wheel. The dragging sound could be caused by the brake drum not fully releasing when the brake is released. Technician A believes it's a defective proportioning valve issue. It sounds to me like some components aren't moving freely and are getting stuck causing the pulling and noises. Who is correct? Continue scrolling to learn more about these common issues and their solutions. B only Brake Chatter: Warped or improperly finished rotors will cause this noise. When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________. Don't drive the car in any case; there is something wrong with your brakes if the pedal is soft. Replace the hydrobooster. Which of the following is the proper procedure? auto tech review 3 Flashcards | Quizlet It will lead to increased tire wear. _____ Slows a vehicle by converting the vehicle's kinetic energy into electrical energy. Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. d. Neither A nor B, The front wheel bearings are being adjusted. A. So im getting drag on my front brakes, both sides, after i drive it about 15-20 miles i jack up the front end the the wheels are real tight to spin by hand and you can hear the pads screeching against the rotor. A. pumping the brake pedal 10 times with the ignition switch on For drum brakes, a 10 lb. There are only about nine evil mechanics in the world, they just move around a lot! What do you think the problem might be? Even today, your brakes can fail completely, but there are failsafes built into the system to prevent that from happening in most cases. The star adjuster should be adjusted one full turn to back the shoes away from the drum. I seem to remember a similar post where the cause was found to be the brake pedal not returning fully, but not noticed by the driver. The ABS (antilock brake system) amber light does not go off after the engine is started. What can cause brake drag, rear wheel lock up, or front wheel lockup upon breaking? All modern cars come with sophisticated antilock braking systems (ABS) and brake based stability control, which complicates some aspects of troubleshooting and repair, but those systems will inform you when there is a problem and default to the old, simple system. Note: I dont recommend pulling up on the emergency brake handle at high speeds, it can cause your rear brakes to lock up and send the vehicle into a spin causing death or serious injury! You can do this test if your emergency brake handle is near the center console and it is the style that you pull up with your hand. If the piston is stuck, and the fluid pressure can't push it back into the bore easily, the pressure on the pads will be uneven and the car will pull. These records must include: (1) An identification of the vehicle including company number, if so marked, make, serial number, year, and tire size. \mathrm{m} / \mathrm{s}.pB,i=4,6,0kg.m/s. How To Determine Cause of Brake Drag - Ford Truck Enthusiasts Forums Technician A is wrong because the proportioning valve only affects brake lockup and is not used on 4-wheel disc brakes only on disc/drum combinations. Luckily, changing a brake caliper is not a hard job, and can be accomplished in about an hour. The first step when diagnosing a problem with caliper mountings, slides, and pins is to: The purpose of the lugs on the backing plate is to: On some pads, the depth of the groove is set so: Disc brake pads consist of friction material ________ or _________ onto a steel backing plate (disc brakes). ASE identifies suspension both . To reduce disc brake squeal, all mating surfaces of the brake should be clean and lubricated. Use the lens-maker's equation to design three different thin diverging lenses, each having a focal length of 27.0cm27.0 \mathrm{~cm}27.0cm and each made from glass that has an index of refraction of 1.601.601.60. The failing bearing allows the hub to move around, effectively pushing the brake pads back into the caliper as far as it can. Modern cars use a power assist (vacuum or otherwise) hydraulic system, with disc brakes on the front wheels, and discs or drums on the back. The other complaints wouldn't occur as a result. While starting the engine with the brakes applied, the pedal does not go down slightly. It's possible that a blocked brake caliper or brake drum is to blame for that dragging sound your automobile is making. Technician B A worn or corroded master cylinder bore causes excess pedal effort resulting in dragging brakes.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'freeasestudyguides_com-medrectangle-4','ezslot_3',116,'0','0'])};__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0'); Brake Lines and Hoses: There may be pressure trapped in the brake line or hose after the pedal has been released. If it the booster, check valve, or vacuum hose is bad, it will likely also cause a vacuum leak and rough engine idle as well, but an engine with a bad valve or head gasket can also cause low vacuum which can effect the brake boost. Answer: I don't think it has anything to do with the brake, try starting it without doing that and see what happens. A only Correct answer B-Having a seized caliper piston leads to a high pedal. Who is correct? Who is right? Now I have loud grinding sounds coming from the front left tire. It will also have a fault code related to the loss of boost. Low or uneven tire pressure can cause a pull. If you don't know what to look for, have a mechanic who knows what they are doing and are reputable to inspect the brakes. b. c. Both A and B See less 79 RC bought from original owner in 2006 A) Warped rotors B) anti-lock braking system operation C) Both A and B D) None of the above Both A and B Which of the following can cause brake system dragging? Excessive brake drag Brake drum machined beyond its limit When the fluid gets warm and expands, there is no where to go, so it starts applying the calipers, and the brakes drag. Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. C. Installation of a new brake rotor Search by Part Number(s), Keywords, or VIN, Chevy Brake Problems: Common Issues and How to Fix Them, How to Program Chevy Silverado Key Fob Remote, How to Reset Your Chevy or GMC Oil Change Light, How to Unlock Your Chevy or GMC Radio for Free, How to Update Chevy and GMC Navigation Units. b. Four-wheel alignment Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. Brake fade is loss of stopping power that occurs when excessive heat reduces friction between brake shoe linings and drum. measure the pad-to-caliper piston clearance. c. Low brake fluid initial cost Hydro boost locking up breaks | Diesel Place You will find the booster between the master cylinder and the firewall in your engine compartment. I recommend having all the brake lines, calipers, and the master cylinder checked for leaks. Ok, im starting a new thread because the problem is not an alignment problem anymore. Technician A 1) Caliper Slides The caliper has grooves which secure the brake pads in place and allow the pads to slide inward after you put your foot on the brake pedal. Question: Does an emergency brake in a car not work after an accident? The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. Residual check valve Brake adjustment Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). Is this possible? Lubricate the pads where the brake shoes ride on the backing plate of drum brakes. a. This leads to excessive pedal travel. Which technician is most likely correct? In this article, I will explain the most common reason for a slipping automatic transmission and the most common reason for a slipping standard transmission. When I bled the lines, the driver side brake fluid wouldn't come down. Brake dragging is commonly caused by broken or weak springs on the drum brakes. Eventually, a sticking brake caliper will wear down the brake pads. A vehicle is equipped with a vacuum brake booster. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. Brake rotors need to be refinished under all of these conditions EXCEPT: Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. You wouldnt pack your own parachute on your first jump, would you? If the vehicle has low or uneven tire pressure, there might be a pull. Answer: Most likely your caliper is defective, if it were the master it would most likely be more then one brake caliper sticking. Air in the hydraulic system A vehicle has a very erratic brake pulling concern while applying the brakes. This pedal adjustment is crucial, and if adjusted too tightly, the vent port of the master cylinder can become blocked. Correct answer B-The greatest drawback of drum brakes is that they are susceptible to fade. I changed the brake pads, but that didn't help much. The correct answer is C. Of the choices given, only an out-of-round brake drum can cause pulsation in a hydraulic brake system. All of the following items could cause this erratic pull EXCEPT: Technician B Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. The residual valve (often in the master cylinder or proportioning valve) keeps a small amount of pressure in the brake lines so the pedal doesn't have to travel so far until initial engagement; a failure here can be difficult to pinpoint. They consist of the index of refraction of the lens and the radii of curvature for its two surfaces. A check valve that is faulty can also let vacuum bleed out. Symptoms of a Bad or Failing Brake Hose | YourMechanic Advice The building pressure in the system results in brake drag and possible brake lockup. 2. A routine inspection would include all of the following EXCEPT. Which of the following can cause brake system dragging? 1. The steering wheel vibrates all the time and always veers to the left. Brakes, when applied must not disrupt steering geometry. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as . Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters. A only This drag happens with drum brake systems as the springs wear or become rusty. A) Internal master cylinder leak B) Warped rotors C) Both A and B D) None of the above None of the above Electric Vehicle Research Paper 100100100 d. Repacking a front wheel bearing, Technician A says a defective wheel or axle bearing can make a growling or rumbling noise. Mechanical fading is when the drum gets too hot and expands away from the linings. Hard Pedal- It takes much more pressure to get the same amount of pedal travel and braking force. a. The four noises that car owners complain about most often: CV joint noise, water pump noise, belt noise, and heat shield noise. Pulsation:This is the symptom of a brake rotor that has warped. Answer: Is your abs light on? The common cause of this is a broken or weak retracting spring on drum brakes, corroded or jammed caliper piston, corroded mounting pins or the bushings on a floating caliper, the drum brake self-adjusters are overextended or there is an emergency brake cable that is sticking or is frozen in place. As a rule of thumb, shaking caused by a problem in the front end of the car will be felt in the steering wheel, while shaking in the rear will seem to affect the whole car. 8. d. while driving the vehicle slowly. The caliper can also freeze up if the caliper slide pins have lost lubrication because they have not been maintained properly. Brake booster causing brake drag? | Dodge RamCharger Central The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. Scraping Brakes:Metal-to-metal sounds mean that the pads or shoes are worn out. C. Both technicians Some of our partners may process your data as a part of their legitimate business interest without asking for consent. c. Both A and B A short power assist brake booster push rod will lead to which of these? Question: The brakes on my new O4 Ford Explorer are dragging. measure the pad-to-caliper piston clearance. Brake Pull: Uneven braking means that you have one front brake on your Chevy that is not operating properly. Binding pedal linkage would lead to a hard pedal, which is also true for a dented brake line. The technician believes there is most likely an issue with the hydraulic system. ASE A4 Practice Test (Updated 2023) | Chapter 38 Test.docx - 5 / 5 First, it can act like a restrictor in the line. Technician A is wrong because the parking brake only affects the RED Brake Light not the amber. Vacuum Pressure Vacuum - or really lack of vacuum pressure - is the most common cause of a hard brake pedal, and therefore the first thing to look at when a hard pedal is present. Who is right? Auto Test -sambooy Flashcards | Quizlet You shouldn't waste your valuable time trying to rebuild it. To determine if your rear brakes are the problem, you need to test them in isolation. They will need to be resurfaced. A rotor face must be within .0005 inch of being parallel and flat with no more than .003 inch of runout. B only This difference in pressure happens when the line is pinched or kinked and leaves the brake unit applied and dragging. a. Then, it's easier to empty once it's out. If there is plenty of fluid in evidence, check if it is hot; repeated hard use, towing, descending a steep hill, or a dragging calipercan boil the fluid. Correct answer C-A short push rod length will have to travel farther for contact and result in excessive pedal travel. My Car Sounds Like Something Is Dragging, But Nothing
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