which of the following can cause brake system dragging
Answer B, glazed . Question: My rear inner pads wear down faster than the outer ones. Correct answer D-A seized caliper piston could cause the pedal to be high with reduced braking power. Question: I just had brakes and rotors done two months ago on my vehicle. b. 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! Technician B Which technician is most likely correct? a. The building pressure in the system results in brake drag and possible brake lockup. One safe way to test whether a braking problem is at the front or rear brakes is to drive at a low speed and: (7.1.2) *, All of the following can cause brake pedal pulsation, EXCEPT, All of the following can cause brake system dragging, EXCEPT. Any noises coming from your car may result in you ignoring the indicators. B only A. A brake pad that is semi-metallic will be noisier than a non-asbestos or ceramic pad. What is this type of bearing failure called? If your brakes squeak and you want to know why, maybe I can help! If you determine that you have a leak, check the calipers, hoses, lines, master cylinder and wheel cylinders for the leak. Excessive brake drag d. while driving the vehicle slowly. Answer: The most likely cause is a caliper sticking, either it's the piston or slide pins. Correct answer D-Both of these techs are wrong. It can also be the result in worn disc brake pads. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. The power booster uses engine vacuum to assist your leg when applying the brakes, and is nearly universal in modern cars. The system reverts to regular brake operation without ABS. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. Excessive tire pressure Assume the brakes are not applied. A power assist brake booster push rod that is to short will cause which of the following? All of these might lead to a low brake pedal, EXCEPT: Soft Pedal- The brake pedal is easy to push but there is less braking. D. Neither technician. Chapter 45: Servicing Hydraulic Systems and P, Chapter 16 Activity: Reconstruction and Resis, Study for Chapter 11: Health and Wellness, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. A faulty proportioning valve or master cylinder could also cause a pull to one side when braking; this is unusual but it does happen. The brakes can fail if your hydraulic system or master cylinder is leaking. b. Four-wheel alignment 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. d. Neither A nor B. Brake Chatter: Warped or improperly finished rotors will cause this noise. They need to be replaced at once. The ABS is what kicks the brake pedal back, so most likely it has something to do with the ABS system. 8. Answer: The brake fluid temperature rising and pressure building in the brake system. It's good to understand what the cause of your problem might be before a mechanic starts talking about the need to replace this or that. b. Brake hoses twist while replacing the caliper after a brake job resulting in brake drag at that unit. d. Neither A nor B. Correct answer D-The leak must be repaired before the linings are replaced. c. Replacing a ball joint a. Question: The brakes on my new O4 Ford Explorer are dragging. 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. All of these would cause a low brake pedal, EXCEPT: Checking your brakes at regular intervals is a goodpractice towards the maintenance of your Chevy. In a brake system with disc front and drum rear, there is a valve in the system known as a metering valve or hold-off valve. d. Air in the hydraulic system. Dragging brakes must be repaired because it results in overheated parts and possible damage to the brake system. Electric Vehicle Research Paper This article takes a closer look at three common culprits. I've included some pictures and FAQs. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________. Which is the correct way to service these brakes? Tech B states that this function can also be carried out by the driver in manual mode. 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. The master cylinder, where it attaches to the brake pedal. A routine inspection would include all of the following EXCEPT. Answer: It sounds like you may have an ABS sensor not reading properly or maybe a damaged ABS sensor wire? c. Both A and B Correct answer A-You torque an adjusting nut to a specified torque and back off the nut till it lines up with the hole and install the cotter pin. The other choices will not do this. This braking problem can be caused by several different things, even the tires (see below), but the most common cause is a frozen caliper. This also reduces braking power. d. Neither A nor B. These records must include: (1) An identification of the vehicle including company number, if so marked, make, serial number, year, and tire size. Question: I had problems with my brakes grinding and pulling to the right when braking. This difference in pressure happens when the line is pinched or kinked and leaves the brake unit applied and dragging. Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes? Correct answer C-New brake rotors don't need to be refinished. Failure of lateral runout or thickness variation checks Cause: Rear Wheel lockup or squatting has many causes. On some vehicles, disc brakes are equipped with a steel scratcher that: Brake pad wear indicators may be either mechanical or: Which tool is used to measure the useful life of brake linings? The wheel cylinder is attached to the ________. Who is right? B only c. VAV_\text{A}VA and ITI_\text{T}IT? C. Both technicians Don't drive the car in any case; there is something wrong with your brakes if the pedal is soft. Seized caliper piston Another uncommon cause of a soft pedal and long travel, is a bad wheel bearing, which is unrelated to the brakes except for being in the vicinity of the rotors. Correct answer C-The weak hydraulic brake hose causes a spongy pedal. d. Neither A nor B. That bleeds out any vacuum. Most instances of a hard pedal come down to a failure in the power boost system, whether vacuum based or hydro-boost (used mostly on diesels, we won't be covering it here). As a result, the car may exhibit a dragging sensation, since the brakes at the affected wheel are applied (or partially applied) at all times. Who is correct? b. You may lose your brakes if you run out of travel before they are fully applied. 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. In the following questions, "initial" refers to values before the collisions, and "final" refers to values after the collision. c. Both A and B Tech B Tech A says that the vacuum booster increases the vacuum in the brake system. Technician A says excessive rotor run out could be the cause. 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. The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. Replacing sealed wheel bearing If nothing happens, check the vacuum connections, and if they are okay, you need a new booster and vacuum hose. Technician A says a parking brake not fully released could be the cause. If the impact occurs in 0.06 s, determine the average impulsive force acting on the car. Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. Answer: There are a few options to look at here. You may feel your Chevy jerk when you brake. c. Leakage past the master cylinder cups Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. This can be repaired by resurfacing or shims. B only Brake pads are being replaced on a vehicle with four-wheel disc brakes. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. Brake pad friction materials may be manufactured from any of the following EXCEPT: makes a noise if the brake pads are due to be replaced. What do you think the problem might be? a. If you are trying to bring a project car back to life, but can't get it to roll, chances are this is the problem. Correct answer C-An ABS with a high-pressure accumulator, you depressurize it by pumping the brake pedal 25 times while the ignition switch is off. Technician B Poor stopping c. Seized caliper piston on the other side Replacing your tires will fix this, or you could try rotating your front tires to the rear of the vehicle. The lack of brake pedal free play on a vehicle might cause: Correct answer C-when there's no free play, the brakes can't disengage fully. Brake problems can be daunting if you don't know what's causing them. 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. We and our partners use cookies to Store and/or access information on a device. The other three answers can lead to a low brake pedal. This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. Or it's possible your brake booster push rod is out of adjustment. I recommend having all the brake lines, calipers, and the master cylinder checked for leaks. B only This article also includes a repair technique for noisy drum brakes that I found by trial and error. They will need to be resurfaced. It's worth grabbing a flashlight and looking to see whether the master cylinder is leaking visibly. c. Brinelling Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance. b. Binding pedal linkage would lead to a hard pedal, which is also true for a dented brake line. All of the following items could cause this erratic pull EXCEPT: A only A only Answer: It is most likely either a blockage in the line or a worn brake master cylinder. Technician B says that the star wheel assembly should be lubricated on the floating end. A. Low or uneven tire pressure can cause a pull. This drag happens with drum brake systems as the springs wear or become rusty. Correct answer D-Both technicians are wrong because the problem is in the power booster. Technician B To fix this problem you will need to replace the caliper. I recommend having a thorough brake inspection by removing all calipers and inspecting all moving parts of each caliper, if everything looks good, examine the hydraulic part of the system. d. Neither A nor B. A pull when braking may also have nothing to do with brakes. On a car with a drum/disc system, the front brakes lock up on light pedal application. Brake dragging is commonly caused by broken or weak springs on the drum brakes. An automobile has a weight of 2700 lb and is traveling forward at 4 ft/s when it crashes into the wall. The anchor pin never has to take all of the braking force when the brakes are applied, so its strength does not matter. Question: Sometimes when I apply the brakes, the pedal of my SUV goes very low before stopping completely. You notice brake fluid in the engine. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Lubricate the pads where the brake shoes ride on the backing plate of drum brakes. A brake hose problem like this can take two forms. Seized wheel cylinder piston Correct answer C-Brinelling is defined as indentations in the race caused by impact loads or vibrations. The wheel speed sensor is being diagnosed with an OEM diagnostic scan tool. When another fluid, other than brake fluid, is added to the brake system, the two fluids mix and a detrimental act begins to occur in the system. The brake pedal is firm when applied. You may also need to have the drum or the rotors replaced or resurfaced because you waited too long to change the shoes and pads. 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. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Technician B says the brakes on this vehicle cannot be bled. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. What do you think it might be? a. d. Air in hydraulic system. Technician A says the yaw rate and deceleration sensor should be recalibrated. This heat can be caused by a dragging brake unit. b. Proportioning valve It does this through a small sliding valve operating on spring pressure. What can cause this? This article is accurate and true to the best of the authors knowledge. a. Write the correct spelling for Middle layer of skin. Who is correct? The brake pedal starts to feel spongy and low even though all the adjustments have been made according to the specifications. b. Why is there a rear knocking noise from the drums when applying the brakes? b. If you were to remove the line at the master cylinder and at the caliper, could you blow compressed air through it? A only Be careful with brake fluid; it is very corrosive when it gets on paint. A. pumping the brake pedal 10 times with the ignition switch on If you try to fix it by adjusting the rear drum brakes, you will still have the problem until you fix the adjusters. C. 200200200 Question: Only one wheel brakes on my 2000 Acura. d-Neither A or B Both A and B All of the following can cause brake system dragging, EXCEPT: a-stuck caliper piston b-misadjusted master cylinder pushrod length c-restricted brake line or hose d-internal master cylinder leak Internal master cylinder leak Which of the following frictional brake systems is used on vehicles today? What's more, I'll teach you to fix it in either case. A hydraulic system uses the incompressible nature of fluid to transfer force from your brake pedal all the way to your brake caliper, causing it to close around the rotor and slow the momentum of your wheel. 100100100 Brake Squeal:A vibration between the pads and the calipers or the pads and the rotors can cause them to squeal. Who is right? Next, hold your foot to the pedal while starting the engine. 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). b. Arcing Any pull caused by unevenly worn tires will be amplified when you step on the brakes. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. b. At the first sign of trouble with your brakes, you need to either fix them or seek help from a certified GM mechanic. Residual check valve Situations such as heavy loads or long downhill grades where the brakes are used heavily can lead to overheating of the lining, drums, or brake fluid, resulting in a loss of braking called: Which brake is used for holding a vehicle in place when its stationary? If the dust boot that protects the piston from the elements gets torn, water and debris will penetrate the metal in the caliper and cause rust and corrosion. What is the most likely reason? tech B states that the brake-by-wire system uses the break pedal position and pedal application speed as indicators of what the drive wants to do. Question: My Chevrolet 2006 has some braking problems. 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). Continue with Recommended Cookies. Ok, im starting a new thread because the problem is not an alignment problem anymore. B. Al+ClX2AlClX3\ce{Al + Cl2 -> AlCl3} A. To perform a thorough inspection of brake pads, you should do all of the following EXCEPT. A spongy brake pedal may be caused by: Here are five of the most common brake problems in cars. Always use OEM recommended clips and anti-squeal shims. If you do either of these processes, and your brake pads are more than half worn, its worth it to just replace the pads at the same time for the peace of mind it will give you; pads wear out frequently (they are a consumable item) and you might as well deal with them while in the neighborhood. a. Brake Pull: Uneven braking means that you have one front brake on your Chevy that is not operating properly. Opening or loosening any part of the hydraulic system is dangerous because of the fluid pressure. The other major way brakes act up is when they fail to disengage completely in one way or another. If your brake pedal feels squishy, "like stepping on a plum," and won't stop on the way down unless you pump it, or the brake pedal sinks to the floor with little or no resistance, you have a dangerous situation and should NOT drive any further! Brake system to be inoperative Excessive Brake Travel: If the brake linings are worn, the drum brakes are misadjusted or the brake lines have air in them, you will have this issue. One way a caliper can freeze up is by the piston on the caliper being stuck in its bore. They can also cause you to use more fuel. Tech B says that banjo fittings are commonly used to connect brake hoses to wheels brake units. Questions are welcome. Technician B believes it's caused by movement of the brake pad while breaking. c. Both A and B Brake fluid expands as brake fluid temperature rises from normal braking. Who is correct? This leads to excessive pedal travel. Who is correct? It will need replacement or resurfacing. All the other answers could occur. Although, if you have a fluid level sensor in the master cylinder reservoir, you may see this light come on when the fluids are low. Question: A year and a half ago (from 78,000 to 88,000 miles), I had the whole brake system replaced, i.e., pad, rotor, and lines. B only Can I drive my car? Question: Does an emergency brake in a car not work after an accident? Always replace components with genuine GM parts to avoid premature failure of brake system components. initial cost I highly recommend having your car towed; this is a very dangerous situation, and the problem needs to be fixed before the car is driven. Before we get into the specifics of brakes and their problems, you may want to look at some of the basic rules for troubleshooting in general, as written in the beginning of every Haynes manual: Troubleshooting 101. Are they safe? The brakes on quick take up systems use the exact bleeding procedure as systems without the valve.
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