If you see the Brake Warning Light illuminated, it is probably a leak. d. Fluting. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. 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 Bad front tires, or broken belts in a front tire, could cause it. 3 Mechanical Causes of Brake Drag - Radial Tire Service 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? Who is right? It can also be due to a corroded or jammed caliper piston or a caliper that has corroded bushings or mounting pins. d. Neither A nor B. Which technician is most likely correct? The brake pedal starts to feel spongy and low even though all the adjustments have been made according to the specifications. D. Brake pedal pulsation. Replacing your tires will fix this, or you could try rotating your front tires to the rear of the vehicle. See less 79 RC bought from original owner in 2006 Technician B says air trapped in the hydraulic system could be the cause. Rear Brake Drag or Lockup - Drum Brakes - Phoenix Systems The wheel cylinder is attached to the ________. The brakes on your car are probably the most important system, and due to the difficult job they do and how often they are used, they are also one of the most likely to wear and need service. A. 2320, what is the phase relationship between A possible cause of this leakage might be: Correct answer C-A defective hose would not allow the fluid to enter the engine. Any brake booster (whether from Master Power or any other supplier) needs a vacuum source to operate. If the brake drum is machined beyond its limit the contact surface is further from the brake shoes and they move outward to maintain contact with the drum, causing the brake pedal to drop toward the floor as additional brake fluid moves into the hydraulic system. What's up with that? Brake dragging is commonly caused by broken or weak springs on the drum brakes. All the other answers could occur. Which of the following would NOT cause a disc break to drag? 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. A power assist brake booster push rod that is to short will cause which of the following? The sliding and moving parts of the brake system require lubrication to prevent them from binding. 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. Brake fade is when the brake fluid is contaminated, so it causes a soft brake pedal, air in the lines, leaking master cylinder, frozen or seized caliper pins or piston, worn out pads, and glazed rotors. A only The only fix I recommend for a faulty master cylinder is to replace it with a new one. The steering wheel vibrates all the time and always veers to the left. Technician B believes it's caused by movement of the brake pad while breaking. 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. The building pressure in the system results in brake drag and possible brake lockup. You could also have a ballooning brake hose when the brakes are applied. You don't need to do anything different. If the master cylinder is leaking externally, you will see fluid dripping from the place where the rod goes into the cylinder. The way to prevent these issues is to avoid driving in deep puddles, or areas where salt is used on the roads, but if that isn't an option, be sure to clean the wheels and underside of the car often in winter. That way, if there is a leak in one part of the system, it should only affect one front brake and one rear brake. Correct answer D-The metering valve controls the pressure to the front disc brakes on a combination system and if defective can allow too much pressure causing a lock-up. 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. 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. The other choices do not affect this concern. Technician B says the test involves checking the level of vacuum supplied by the engine or vacuum pump. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. b. Replace the brake linings Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. C. Both technicians Contact. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? While these are the most common causes of brake issues on your Chevy, you should never allow your brakes to go bad. A only Soft Pedal- The brake pedal is easy to push but there is less braking. "Scratcher" and "sensor" are types of disc brake pad __________ indicators. Low or uneven tire pressure can cause a pull. Answer B, glazed . a. Sinking Pedal: You may notice this while sitting at a stop light. 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? An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. The brakes can fail if your hydraulic system or master cylinder is leaking. Object A has mass mA=7kgm_{A}=7 \mathrm{kg}mA=7kg and initial momentum pA,i=17,5,0kgm/s,\vec{p}_{A, i}=\langle 17,-5,0\rangle \mathrm{kg} \cdot \mathrm{m} / \mathrm{s},pA,i=17,5,0kgm/s, just before it strikes object B, which has mass mB=11kg.m_{B}=11 \mathrm{kg}.mB=11kg. c. Both A and B The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. You have questions like: Will my brakes fail? Technician A How to Adjust Drum Brakes | YourMechanic Advice It's also possible to check the blink codes with the DLC. Any noises coming from your car may result in you ignoring the indicators. This delay causes the spongy feel. auto tech review 3 Flashcards | Quizlet C. Both technicians Hard Pedal: You may have a loss of power assist because the engine vacuum is low. One way a caliper can freeze up is by the piston on the caliper being stuck in its bore. Which of the following can cause brake system dragging? c. Both A and B 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. With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. 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. Correct answer C-The weak hydraulic brake hose causes a spongy pedal. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. It does this through a small sliding valve operating on spring pressure. a. c. Pressure differential switch The other choices will not do this. A low brake pedal can also be due to a fluid leak or worn brake linings. Many times the cause of an accident will be due to a problem with the brakes. For drum brakes, a 10 lb. 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. 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. C. Both Technicians Technician A says a defective proportioning valve could be the cause. 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. Troubleshooting A Hard Brake Pedal | Classic Car Restoration Club 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. Symptoms of a Bad or Failing Brake Drum | YourMechanic Advice 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. residual valve is used to hold pressure against the . If you get no assist, you need a new check valve. You also want to use OEM clips and anti-squeal shims. DOT 5 Tech A says that quick take-up master cylinders use two additional pistons to move brake fluid faster. Is this a caliper or could it be a blockage in the brake hose? 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? For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. 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. 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. The other three answers wouldn't cause the same issues. Brake system to be inoperative Bleed the brake lines as recommended by Chevy to fix this. However, it can also be due to fluid loss or a low fluid level. a. Manage Settings d. Brake light is illuminated. 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. Air in the hydraulic system b. The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. Fear of the unknown causes anxiety. Question: I just had brakes and rotors done two months ago on my vehicle. It doesn't have power assist until the engine runs for a minute, then it begins to work normally. c. Low brake fluid Typically a seized caliper or pads will cause a burning smell, a pull to one side, and dragging at one wheel, but it is possible for it to stick without those, and effectively lessening your braking by nearly half (if it is a front wheel, which provide 75% of the braking). Even with proper maintenance, you may find yourself with an unexpected brake problem -- here are some of the most common examples. A drum or rotor that has deep scores in it will cause the brakes to grab. C. Both technicians Buying a new caliper may cost more but you will make up the cost with the time you save. You should clean or replace the adjusters to eliminate the problem. Loose wheel bearing Correct answer A-The engine must be off to deplete the vacuum reservoir to test the booster. C. Dragging brakes A pull when braking may also have nothing to do with brakes. They need to be replaced at once. You shouldn't waste your valuable time trying to rebuild it. A. Figuring out the problem and solutionis simply the result of having the right knowledge combined with an intelligent, systematic approach. Correct answer C-Both techs are correct. Symptoms of a Bad or Failing Brake Hose | YourMechanic Advice Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance. If you have this type of rear braking system, it is almost impossible to isolate the rear brakes. There is also typically a separate, mechanical parking/emergency brake, either cable or electrically operated, that works only on the rear wheels. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as . 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. To put this discussion about brake proportioning valves in context, there are actually three basic kinds of valves in play in a non-ABS system. Correct answer D-A seized caliper piston could cause the pedal to be high with reduced braking power. You can diagnose this by starting your Chevy in order to build vacuum, and then turning it off for four or five minutes. When the fluid gets warm and expands, there is no where to go, so it starts applying the calipers, and the brakes drag. Who is right? Why is this? Beginner's Guide: What is ABS (and How Does It Work)?

Dan Jenkins Yellowstone Death, Home Health Goals And Interventions Examples, Small Restaurant For Rent Mn, Articles W