Correct answer B-If the amber light is on, it indicates that there is an ABS fault. Ok, im starting a new thread because the problem is not an alignment problem anymore. If you do a lot of highway driving and you happen to be hard on your brakes, you will probably run into this problem many times in the life of your car. In Fig. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. This drag happens with drum brake systems as the springs wear or become rusty. B only The master cylinder, where it attaches to the brake pedal. Answer: There are a few options to look at here. How To Determine Cause of Brake Drag. Cause: Rear Wheel lockup or squatting has many causes. A. pumping the brake pedal 10 times with the ignition switch on Sometime a misadjusted brake light switch can cause this, a blockage in a line, a frozen caliper slide pin, or a caliper piston will not more freely are all likely causes. Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). Al+ClX2AlClX3. You can resurface the rotors if they are still thick enough. c. Both A and B The sliding and moving parts of the brake system require lubrication to prevent them from binding. Even today, your brakes can fail completely, but there are failsafes built into the system to prevent that from happening in most cases. Technician B says that the star wheel assembly should be lubricated on the floating end. d. Air in hydraulic system. Hopefully this information will help you (and your mechanic) decide where to start when fixing your problem. A. You have questions like: Will my brakes fail? 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). They can also cause you to use more fuel. B only a. Checking the diagnostic trouble codes is possible. Some of the cause of brakes dragging on one or more wheels can be: A seized caliper or brake pads that have become jammed in the caliper is probably the most common failure of this type, and can occur due to age, rust, and salt used on winter roads. Correct answer D-A seized caliper piston could cause the pedal to be high with reduced braking power. The three most common brake noises I encounter every day when talking to customers are a grinding sound, a thumping from the rear, and a squeak. Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance. B. A better idea of where the master cylinder is located in relation to the brake pedal. A master cylinder may fail in two ways: internally or externally. Lubricate the pads where the brake shoes ride on the backing plate of drum brakes. c. with the vacuum hoses removed b. Arcing Seized caliper piston D. Neither Technician. 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. Push and hold the release button on the end of the emergency brake handle; this is so the emergency brake does not lock into place and can be released easily. d. Neither A nor B. Every car since 1968 has had redundant hydraulic systems, not to mention the parking/emergency brake, to prevent complete brake failure. Brake drag often occurs when the fluid in your system overheats. To do this test, drive your car in a remote location with no traffic at a speed of about 30 miles an hour. If the brake fluid reservoir is full and there are no signs of leaks, the problem is usually an internal problem that you cant identify just by looking at the master cylinder. a. Correct answer B-This is the standard process by many OEMS when a new rotor is installed. Assume the brakes are not applied. If the brake drums are worn excessively they can cause vibrations that may be felt in the pedal. a. b. Wash in hot, soapy water and dry. B only Be careful with brake fluid; it is very corrosive when it gets on paint. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. Bleed the brake lines as recommended by Chevy to fix this. 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. A only Technician A is working on a vehicle that was brought in with excessive brake pedal travel. Regardless, I recommend having a thorough brake inspection by an experienced mechanic. Brake systems contain all of these components EXCEPT: Correct answer B-Copper tubing should never be used within the brake system. 1. When I apply the brakes, especially downhill, I feel the brake pedal presses itself more than I do. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. The vacuum booster can be checked by pumping the pedal a few times while the engine is off. 4-wheel disc brakes on a vehicle are causing brake squeal. If you dont find your issue here, check out my article on brake noises, look through the comments at the end, or leave a comment yourself telling your story. Brake Chatter: Warped or improperly finished rotors will cause this noise. You could add shims, use a brake noise aerosol, or brake grease to the backs of the pads to dampen the noise. The pictures below show the master cylinder under the brake pedal. Wearing your pads down to the metal baking plates will also result in a very "wooden" brake pedal as well, as there is not as much friction when it is metal on metal, and they have to clamp harder to slow you down; the horrible grinding noise is usually an indication before the hard pedal. Don't drive the car in any case; there is something wrong with your brakes if the pedal is soft. 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. This article takes a closer look at three common culprits. One way to test your rear drum brakes is to apply the parking brake slightly while driving, because the parking brake uses the drum brakes in the rear. It can also be a vacuum hose leak to the booster, or it can be a booster that is defective. Then, it should be backed off until there's a drag on the wheel. 100100100 To further reduce noise, do not machine a disc brake rotor more than absolutely necessary. It doesn't have power assist until the engine runs for a minute, then it begins to work normally. This can be repaired by resurfacing or shims. Meanwhile, pull up on the handle just enough to feel the rear brakes grab slightly. You may feel your Chevy jerk when you brake. . Fluid will not run from the master cylinder while you remove it. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. Brakes Flashcards | Quizlet B only You don't need to do anything different. If it is too worn, you must replace it. Answer: The most likely cause is a caliper sticking, either it's the piston or slide pins. ASE PRETEST QUIZLET Flashcards | Quizlet d. Brake light is illuminated. B only 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 soft brake pedal is a MAJOR brake issue. See less 79 RC bought from original owner in 2006 The wheel speed sensor is being diagnosed with an OEM diagnostic scan tool. Correct answer D-Both technicians are wrong because the problem is in the power booster. b. Technician B says a defective wheel displays looseness or excessive play in the steering wheel especially while driving over rough road surfaces. The building pressure in the system results in brake drag and possible brake lockup. A only Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. Technician B That bleeds out any vacuum. c. Parking brake out of adjustment A clogged fluid return hole in the master cylinder can cause all four wheels to drag, because the fluid sent to the wheels when you press the pedal can't return and let the pressure off. The ABS light doesn't go off after the engine starts. Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. A. Question: The brakes on my new O4 Ford Explorer are dragging. 2023 The Arena Media Brands, LLC and respective content providers on this website. Answer: You have a rear knocking noise from the drums because your shoes are being pulled away from the backing plate and snapped back into place by the spring clips. d. Neither A nor B. This is a very common brake issue on all makes and models: when youre driving at highway speeds and you apply your brakes, the steering wheel shakes. What could be the issue? If you work by process of elimination, starting with the most likely cause and working through to more complex issues, you can easily diagnose the problem yourself. Brake fluid reservoir. Correct answer A-Air in the hydraulic system is the only choice that creates a spongy pedal. You can verify the wheel speed sensor operation while comparing the four-wheel outputs to the data list. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. b. The rear brake linings are soaked with axle grease but still have a lot of lining left on them. If you have a soft or sinking brake pedal and are looking for information on what's causing it or what you should do next, you'll find the answers here. Then you should try the brakes. They need to be replaced at once. Poor stopping c. Defective metering valve. It's possible your ABS module is no good. Correct answer B-Having a seized caliper piston leads to a high pedal. A only If you see the Brake Warning Light illuminated, it is probably a leak. Brake system to be inoperative a. Question: My brakes squeak only when I back up. A low brake pedal can also be due to a fluid leak or worn brake linings. Technician A says a parking brake not fully released could be the cause. Connect a hose to the caliper bleeder screw and insert the other end of the hose into a suitable container, open the bleeder screw, then use a C-clamp or pliers to slowly bottom the piston in the caliper Technician A says that all 3 channel ABS systems use only 3 wheel speed sensors. a. Which of the following can cause brake system dragging? B. To fix this problem you will need to replace the caliper. I recommend having this area of the brakes inspected first. which of the following can cause brake system dragging Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. I changed the brake pads, but that didn't help much. b. Answer: The first thing you need to do is remove all four wheels and inspect all caliper slide pins, pistons, and brake pads and shoes. Correct answer A-Excessive brake pedal travel is a sign of low hydraulic fluid, air in the hydraulic system, and can be caused by some mechanical issues as well. Then, it needs to be backed off until the wheel begins to spin freely. a. Are they safe? If your car sits for long periods without moving, moisture from rain or high humidity causes your rotors to rust, except for the patch of rotor surface where the pads rest. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. If you get no assist, you need a new check valve. Brake drum machined beyond its limit Al+ClX2AlClX3\ce{Al + Cl2 -> AlCl3} Check your brake hoses for anomalies. c. Both A and B Technician A believes it's a defective proportioning valve issue. b. 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. 2. After the collision, object A is observed to have final momentum pA,f=13,3,0kgm/s.\vec{p}_{A, f}=\langle 13,3,0\rangle \mathrm{kg} \cdot \mathrm{m} / \mathrm{s}.pA,f=13,3,0kgm/s. The Arena Media Brands, LLC and respective content providers to this website may receive compensation for some links to products and services on this website. Even with proper maintenance, you may find yourself with an unexpected brake problem -- here are some of the most common examples. Other times it is fine. C. pumping the brake pedal 25 times with the ignition switch off Any brake booster (whether from Master Power or any other supplier) needs a vacuum source to operate. 505050 The lens-maker's equation has three design parameters. ASE A4 Practice Test. An example of data being processed may be a unique identifier stored in a cookie. An often-misdiagnosed cause of pull is a collapsed brake hose. Correct answer C-A short push rod length will have to travel farther for contact and result in excessive pedal travel. Question: I had problems with my brakes grinding and pulling to the right when braking. What Causes Brake Drag and How to Reduce It - Autos.com 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. Who is correct? The brakes on quick take up systems use the same bleeding procedure as those without this valve. Here is the list of possible causes: Service and parking brake adjustment Rear brake hardware Shoe lands or bosses GM clip in wheel cylinders Brake drum condition Brake shoe contamination Brake valving Friction material Additionally, brake dragging can also be caused by frozen emergency brake cables as well as . Correct answer D-Both of these techs are wrong. The air cleaner also can't cause a brake fluid leak. c. Brinelling Replace the hydrobooster. The steering wheel vibrates all the time and always veers to the left. Light trucks and vans were mandated to be equipped with center high mount stop lamps in: A regenerative braking system uses_____to slow the vehicle during braking. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters. An automobile has a weight of 2700 lb and is traveling forward at 4 ft/s when it crashes into the wall. Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. eCFR :: 49 CFR Part 396 -- Inspection, Repair, and Maintenance Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Brakes, when applied must not disrupt steering geometry. Contact. B. Brake dust is best removed from brake components on the vehicle by using: If a retracting tool is not available, which of the following can be used to retract the pistons in a caliper with non-integrated parking brakes? Copper corrodes easily which makes it a poor option. Brake fluid expands as brake fluid temperature rises from normal braking. 1. 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? 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. Soft Pedal- The brake pedal is easy to push but there is less braking. B. loosening the bleeder screw on the accumulator with the ignition switch on The mechanic is now telling me I need all of those parts replace again. c. Leakage past the master cylinder cups Technician A says the cause could be a leaking power brake booster diaphragm. Technician B says disc brake squeal is often caused by movement of the disc brake pad during braking. c. Seized caliper piston on the other side Who is right? The wheel cylinder is attached to the ________. An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. This heat can be caused by a dragging brake unit. 3 Mechanical Causes of Brake Drag - Radial Tire Service It sounds to me like some components aren't moving freely and are getting stuck causing the pulling and noises. How to Replace Honda Brake Pads: Tips and Precautions. It's worth grabbing a flashlight and looking to see whether the master cylinder is leaking visibly. The system reverts to regular brake operation without ABS. Why is there a rear knocking noise from the drums when applying the brakes? 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! The rotor needs to be measured at the thinnest point with a micrometer or vernier caliper to determine whether it can be resurfaced or not. The backing plate has holes stamped in it for all of the following to pass through, EXCEPT ______. The other complaints wouldn't occur as a result. To reduce disc brake squeal, all mating surfaces of the brake should be clean and lubricated. Who is right? Intermodal equipment providers must maintain or cause to be maintained, records for each unit of intermodal equipment they tender or intend to tender to a motor carrier. However, it can also be due to fluid loss or a low fluid level. A vehicle has a very erratic brake pulling concern while applying the brakes. 8. Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. What's more, I'll teach you to fix it in either case. Check your pads for any type of contamination. While these are the most common causes of brake issues on your Chevy, you should never allow your brakes to go bad. A only After that, fixing it is often easy with the help of your Haynes manual. d. Neither A nor B, The front brake rotors and pads are being replaced on a vehicle equipped with a TCS (traction control system) and electronic stability control system (ESC). What is this type of bearing failure called? Why are X-rays, gamma rays, and fast-moving electrically charged particles potentially harmful to our bodies? Question: My Chevrolet 2006 has some braking problems. b. Brake adjustment Technician A says excessive rotor run out could be the cause. There are many possible causes of this shaking, including the front rotors being warped, hot spots (slight irregularities) on your rotors caused by excessive heat, or pad impressions. Technician B states that the brakes can continue to operate like non-ABS brakes. D. Neither technician. As rotors age, they go through the heating and cooling process thousands of times, so it's inevitable for them to lose their shape or trueness. Technician A is wrong because recalibration is not required for these sensors. Question: What causes a brake pedal to depress all the way to the floor in a car? The other three answers wouldn't cause the same issues. 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. ASE T-4 Brakes Flashcards - Cram.com What is the most likely reason? Been there, done that! This problem could be caused by a bad: 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. What is the cause? Hard Pedal: You may have a loss of power assist because the engine vacuum is low. Technician B says that the star wheel assembly should be lubricated on the floating end. 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. A properly working booster will make it easier to hold the pedal and may even slightly depress the pedal by itself. a. The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. A routine inspection would include all of the following EXCEPT. Troubleshooting: Common Brake Issues and Causes What's up with that? a. ABS Diagnostic Trouble Code set All of these might lead to a low brake pedal, EXCEPT: To perform a thorough inspection of brake pads, you should do all of the following EXCEPT: Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Chapter 15 Test 3 Psych Testing and Measure. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. B only When the brake pedal gets soft or sinks to the floor, it's generally due to a leak in the braking system, most commonly the master cylinder leaking internally or externally. This article also includes a repair technique for noisy drum brakes that I found by trial and error. 3 Basic Kinds of Valves in a Non-ABS System. In the brake booster there is a washer that is suppose to keep the pushrod centered as it goes into the mastercylinder. Brake hydraulics are a sealed system, so there should not be air in the lines, but if after service you have a sponge pedal that is the most likely cause. a. Mechanical fade occurs when the brake drum gets so hot it expands away from the brake linings. Brake pads are being replaced on a vehicle with four-wheel disc brakes. This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. To reduce this, the mating surfaces need to be cleaned and lubricated. D. Brake pedal pulsation. The drum brake adjuster is located under an access cover in the back of the drum brake. 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. If your whole car shakes when your brakes are applied, it could be just your rear brakes. These records must include: (1) An identification of the vehicle including company number, if so marked, make, serial number, year, and tire size.
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