which of the following can cause brake system dragging

You should clean or replace the adjusters to eliminate the problem. B only A rotor face must be within .0005 inch of being parallel and flat with no more than .003 inch of runout. Technician B says the wheel's direction of rotation can be verified by looking at the wheel direction on the scan tool data list. The wheel cylinder is attached to the ________. Correct answer C-Both technicians are correct. How To Determine Cause of Brake Drag - Ford Truck Enthusiasts Forums 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. After a master cylinders replaced and the brake system is bled what must happen? A car that pulls to one side can be annoying and also dangerous. Questions are welcome. Correct answer D-A restricted disc brake caliper hose won't cause pedal pulsation. If there is a leak somewhere the fluid level may be so low as to make even the redundantsystem ineffective. The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. Who is right? A only Tech B says that banjo fittings are commonly used to connect brake hoses to wheels brake units. There are different causes for brake drag. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Replace them if you see that they have oil, fluid or grease on them. I've included some pictures and FAQs. When that happens, I release the brakes and apply them again super fast. All of these might lead to a low brake pedal, EXCEPT: This leads to the brakes dragging. Step 2: Adjust the star wheel. These records must include: (1) An identification of the vehicle including company number, if so marked, make, serial number, year, and tire size. 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 lens-maker's equation has three design parameters. ASE A4 Practice Test. It's a vital component in your car; leave it to the pros. 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. We and our partners use cookies to Store and/or access information on a device. The mechanic is now telling me I need all of those parts replace again. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. d. Neither A nor B, A wheel speed sensor is being diagnosed using the OEM (original equipment manufacturer) diagnostic scan tool. A only What can cause this? c. Defective metering valve. If every time you apply your brakes, your brake pedal pulses up and down, the problem is usually caused by the rotors being warped or out of true. d. Neither A nor B. Answer: Either the brake pads need to be replaced, or you could try shaving off the leading rear edge of the brake pad at a 45-degree angle and see if that helps. If you get no assist, you need a new check valve. c. Excessive brake pedal travel Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Correct answer A-You must adjust the star adjuster until there's a slight drag on the drum. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. tech A states that brake-by-wire means there is no mechanical or hydraulic connection between the break pedal and the wheel break units. Unusual brake pedal feel. A. My Car Sounds Like Something Is Dragging, But Nothing Question: My car has power brakes and used to stop on a dime. Brakes, when applied must not disrupt steering geometry. 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. Regardless, I recommend having a thorough brake inspection by an experienced mechanic. 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? Brakes Dragging | The Causes of Brake Drag Explained D. Neither technician. What's up with that? It does this through a small sliding valve operating on spring pressure. It doesn't have power assist until the engine runs for a minute, then it begins to work normally. DOT 5 Tech A says that quick take-up master cylinders use two additional pistons to move brake fluid faster. Bleed the brake lines as recommended by Chevy to fix this. Answer: The brake fluid temperature rising and pressure building in the brake system. Be sure to remove the pad shims from the caliper and check for any rust under the shims as rust can cause the pads to bind. a. The caliper can also freeze up if the caliper slide pins have lost lubrication because they have not been maintained properly. Lubricate slide pins on disc brakes to prevent brake drag and binding. 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. 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. Flashcards - ASE BRAKES - FreezingBlue Loose wheel bearing Technician A believes it's a defective proportioning valve issue. 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. b. B. They need to be replaced at once. d. Repacking a front wheel bearing, Technician A says a defective wheel or axle bearing can make a growling or rumbling noise. The drum brake adjuster is located under an access cover in the back of the drum brake. B. To reduce this, the mating surfaces need to be cleaned and lubricated. A hydroboost power brake vehicle with a hard pedal can be the result of a belt that is loose on the power steering pump, fluid levels are low, power hoses leak or there are valves with leaks or faults on the hydroboost unit. Is this possible? Technician A Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes? Sometimes, though not very often, the brakes won't work, and it sounds like it's grinding for one or two seconds. The other three answers wouldn't cause the same issues. a. 100100100 A. C. Installation of a new brake rotor 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. If it is, you should be able see the fluid on the carpet under your dash, just over your brake pedal. Technician B says backing off the castle nut will cause the bearing to overheat. Checking your brakes at regular intervals is a goodpractice towards the maintenance of your Chevy. Brake system to be inoperative This patch of uneven rotor surface is called a pad impression and will cause the brakes to pulsate. Eventually, a sticking brake caliper will wear down the brake pads. I put new calipers, rotors and rubber lines on a couple of months ago and now the calipers stick sometimes. b. Who is right? D. Neither Technician. 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. a. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. All the other answers are improper ways of adjusting drum brakes. The master cylinder actually contains two pistons and seals, which in simpler systems controlled the front and back brakes separately, or the diagonally opposite wheels, so at worse you would only lose half your brakes. if your brake pedal is soft; first check the fluid level to determine if you have a leak in the braking system. When you are in a crisis situation like a brake problem, some mechanics will take advantage of the customer and over-sell the work that really needs to be done. 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. Technician B says a defective wheel displays looseness or excessive play in the steering wheel especially while driving over rough road surfaces. What is the cause? The brakes can fail if your hydraulic system or master cylinder is leaking. As in: hit the brakes, let go, brake pedal comes back up, master cylinder side piston doesnt came all the way back and keeps pressure on the master. Answer: It is most likely either a blockage in the line or a worn brake master cylinder. Who is correct? This problem could be caused by a bad: The pictures below show the master cylinder under the brake pedal. Sketch each of your designs. b. One way a caliper can freeze up is by the piston on the caliper being stuck in its bore. This also reduces braking power. It will need replacement or resurfacing. Again, you will have to measure the drums to determine if they can be resurfaced or not. B only D. Neither technician. A vehicle has a very erratic brake pulling concern while applying the brakes. Correct answer C-A short push rod length will have to travel farther for contact and result in excessive pedal travel. Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. C. Brake adjustment Fluid will not run from the master cylinder while you remove it. Step 1: Access the drum brake adjustment star wheel. Correct answer A-Excessive tire pressure is the exception because this fault will cause tire wear but not a pull. 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. d. Seized caliper piston. d. Fluting. 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. a. After that, fixing it is often easy with the help of your Haynes manual. One of the first components to engage goes by the name of the push rod. Here are five of the most common brake problems in cars. Check your pads for any type of contamination. 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. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. 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. Answer A, zero brake pedal free travel, will cause a dragging brake condition, but not pulsation. A check valve that is faulty can also let vacuum bleed out. Technician B says the cause is a faulty residual pressure check valve admitting air. If this is what is going on, you need to identify and replace the faulty part. Can I drive my car? Brakes Flashcards | Quizlet You can pump the brakes before application to help offset this problem, but you need to get it fixed. A. Question: I have a 99 Honda Civic EX. Seldom does this result in a car that won't move at all, but driving with the brakes dragging is unsafe and will result in even more damage in a short amount of time if not repaired. Regardless, I recommend having a thorough brake inspection by an experienced mechanic. Contact. Which of the following can cause brake system dragging? Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Answer: The most likely cause is a caliper sticking, either it's the piston or slide pins. I replaced master cylinder already. If your rear drums are the cause of the brake pulsation, you will feel the pulsation at this time, and the car will shake when the emergency brake is applied. 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? . Then, it needs to be backed off until the wheel begins to spin freely. The only fix I recommend for a faulty master cylinder is to replace it with a new one. b. with the engine running The vehicle pulls to the side under heavy braking "Scratcher" and "sensor" are types of disc brake pad __________ indicators. B only b. Wash in hot, soapy water and dry. a. At the first sign of trouble with your brakes, you need to either fix them or seek help from a certified GM mechanic. B. If the master cylinder is leaking externally, you will see fluid dripping from the place where the rod goes into the cylinder. The brake pedal is firm when applied. B only Rotors should be refinished when there is scoring, heat spots, lateral runout, pedal pulsations or thickness variation.

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