Fluid will not run from the master cylinder while you remove it. c. with the vacuum hoses removed This site is owned/ operated by an authorized GM Genuine Parts/ACDelco Seller. Then there are minor issues such as brake squealing, brake shudder/pulsing, burning smells, leaking fluids, pulling to one side, etc. Technician B Auto Mechanical Practices Test; ASE Test Guide; Auto Mechanic Flash Cards; 2023 Edition. You may feel your Chevy jerk when you brake. Answer: Yes, brake pads can cause problems for brakes on a car. A only Then, it should be backed off until there's a drag on the wheel. A rotor face must be within .0005 inch of being parallel and flat with no more than .003 inch of runout. Check out the system to make sure that you do not have a caliper leak or an oil leak. Technician B says the cause is a faulty residual pressure check valve admitting air. d. Neither A nor B, The front wheel bearings are being adjusted. The consent submitted will only be used for data processing originating from this website. Who is correct? d. Air in hydraulic system. 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. a. Seized wheel cylinder piston B. Correct answer A-You must adjust the star adjuster until there's a slight drag on the drum. 2320, what is the phase relationship between 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. Ok, im starting a new thread because the problem is not an alignment problem anymore. The ABS and TRACTION OFF indicator lights stay on while the engine is running. Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. Find out what these noises mean and what might fix them. c. Both A and B Correct answer C-Brinelling is defined as indentations in the race caused by impact loads or vibrations. This also reduces braking power. 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. Question: The brakes on my new O4 Ford Explorer are dragging. A pull when braking may also have nothing to do with brakes. 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. Bleed the brake lines as recommended by Chevy to fix this. Or it's possible your brake booster push rod is out of adjustment. 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. b. A properly working booster will make it easier to hold the pedal and may even slightly depress the pedal by itself. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters. 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. Write the correct spelling for Middle layer of skin. Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. B. The sliding and moving parts of the brake system require lubrication to prevent them from binding. Anything that has rubber in the brake system, such as the brake hoses, calipers, wheel cylinders, reservoir cap, ABS unit, master cylinder, proportioning valves, etc.all become junk. c. Both A and B 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 system reverts to regular brake operation without ABS. Dragging brakes must be repaired because it results in overheated parts and possible damage to the brake system. The backing plate has holes stamped in it for all of the following to pass through, EXCEPT ______. However, it can also be due to fluid loss or a low fluid level. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Correct answer B-Having a seized caliper piston leads to a high pedal. 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). Answer: There are a few options to look at here. Using the screwdriver, gently pry out the rubber grommet that protects this access cover. All of the following can cause brake system dragging, EXCEPT: Which of the following frictional brake systems is used on vehicles today? Correct answer B-The short push rod length has to travel farther to make contact. Which of the following is the proper procedure? Correct answer A-the biggest downside of drum brakes is their susceptibility to fading. It will lead to increased tire wear. Answer: The most likely cause is a caliper sticking, either it's the piston or slide pins. A faulty proportioning valve or master cylinder could also cause a pull to one side when braking; this is unusual but it does happen. d. Repair leak and replace brake linings. How To Determine Cause of Brake Drag. This heat can be caused by a dragging brake unit. 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? Why are X-rays, gamma rays, and fast-moving electrically charged particles potentially harmful to our bodies? Who is right? Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. d. Neither A nor B. Hydro boost locking up breaks | Diesel Place A vehicle with 4-wheel disc brakes has a brake squeal. 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. B only A) Internal master cylinder leak B) Warped rotors C) Both A and B D) None of the above None of the above An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. 7 Symptoms of a Brake Caliper Sticking (and Common Causes) Then you should try the brakes. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. For drum brakes, a 10 lb. Question: What if your car is going through brake fluid fast and your brakes don't want to work? initial cost Any noises coming from your car may result in you ignoring the indicators. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. Technician A The steering wheel vibrates all the time and always veers to the left. If the slide pins are your problem, they need to be cleaned and lubricated or replaced. B only In case these terms are new to you, real quick, I'll tell you that to stop the car, the master cylinder sends out fluid through tubes under pressure to drive a pincher (a caliper) that presses a pad or shoe against a metal disc (rotor) or drum. When I bled the lines, the driver side brake fluid wouldn't come down. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. a. What is the most likely reason? Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. This leads to excessive pedal travel. Excessive freeplay delays application and air in the hydraulic system will cause a spongy pedal. The brakes can fail if your hydraulic system or master cylinder is leaking. ASE A5 Brakes Flashcards | Chegg.com Why is there a rear knocking noise from the drums when applying the brakes? A brake pad that is semi-metallic will be noisier than a non-asbestos or ceramic pad. What could be the cause of the problem? The other brake pad is slightly worn. Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. The hose will look OK on the outside, but the inner liner will cause a restriction on the inside. 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. Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. Brake drag often occurs when the fluid in your system overheats. If there is a leak somewhere the fluid level may be so low as to make even the redundantsystem ineffective. Correct answer C-Both techs are correct. The two main types of disc brake calipers are: The disc brake caliper is attached to the, Sliding calipers have pistons that are positioned on, bleed air or vacuum from the power booster, Brake bleeder screws enable all of the following tasks to be performed EXCEPT. Regardless, I recommend having a thorough brake inspection by an experienced mechanic. Scraping Brakes:Metal-to-metal sounds mean that the pads or shoes are worn out. It's possible your ABS module is no good. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. You can buy an overhaul kit for calipers, but they are hard to find and your caliper may not be worth bringing back to life. Then, it needs to be backed off until the wheel begins to spin freely. What do you think it might be? 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. The steering wheel vibrates all the time and always veers to the left. Soft or Spongy Brake Pedal:Too much air in the system due to improper bleeding is usually the cause of this problem. 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. That's why the power assist begins to function properly after the engine runs. B. Here are the top causes of a brake caliper sticking. On a car with single piston floating caliper disc brakes, the disc brake pad between the caliper piston and the rotor is badly worn. Which of the following can cause brake pedal pulsation? Answer: There are quite a few possibilities for this problem. Brake booster causing brake drag? | Dodge RamCharger Central Replacing your tires will fix this, or you could try rotating your front tires to the rear of the vehicle. Answer: Most likely your caliper is defective, if it were the master it would most likely be more then one brake caliper sticking. A. Questions are welcome. Correct answer C-Both technicians are correct. Correct answer C-Both techs are correct. A spongy brake pedal may be caused by: 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. Brake adjustment Tech B Tech A says that the vacuum booster increases the vacuum in the brake system. B. Don't drive the car in any case; there is something wrong with your brakes if the pedal is soft. All the other answers are improper ways of adjusting drum brakes. Technician B says that the star wheel assembly should be lubricated on the floating end. The vacuum booster can be checked by pumping the pedal a few times while the engine is off. 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. Can you help me understand where the problems are and what I should repair or replace? 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. c. Both A and B residual valve is used to hold pressure against the . DOT 5 Tech A says that quick take-up master cylinders use two additional pistons to move brake fluid faster. b. Four-wheel alignment Then, it's easier to empty once it's out. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. B only c. Both A and B 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! 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). Manage Settings Technician A is wrong because the parking brake would only affect the red brake light.
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