Question: My Chevrolet 2006 has some braking problems. In the brake booster there is a washer that is suppose to keep the pushrod centered as it goes into the mastercylinder. Tech B says that the faster a vehicle moving, the more braking power is needed. C. 200200200 Low or uneven tire pressure can cause a pull. b. Your brakes pull to the good side. Are they safe? 200MeV200 \mathrm{MeV}200MeV is typical energy released in a fission reaction. Answer: There are quite a few possibilities for this problem. Question: My car has power brakes and used to stop on a dime. Rotors should be refinished when there is scoring, heat spots, lateral runout, pedal pulsations or thickness variation. To get a sense of the scale of the energy, if we were to use this energy to create electron-positron pairs, approximately how many pairs could we create? Who is right? Who is correct? Who is right? The brake pedal starts to feel spongy and low even though all the adjustments have been made according to the specifications. C. Both Technicians The mechanic is now telling me I need all of those parts replace again. A soft brake pedal is a MAJOR brake issue. Always replace components with genuine GM parts to avoid premature failure of brake system components. 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! They are not compensating for normal lining wear. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. A slow descent of the brake pedal means that the pressure is leaking out of the master cylinder. Correct answer A-The defective check valve causes a loss in vacuum when the engine is off. a. VAV_\text{A}VA and I1I_1I1? Loose wheel bearing Eventually, a sticking brake caliper will wear down the brake pads. Technician A The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. B. What's more, I'll teach you to fix it in either case. It will lead to increased tire wear. Personal Injury Attorney With Truck Accidents They following are three of them. I recommend having all the brake lines, calipers, and the master cylinder checked for leaks. The only fix I recommend for a faulty master cylinder is to replace it with a new one. A short power assist brake booster push rod will lead to which of these? 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. Technician A is wrong because the parking brake only affects the RED Brake Light not the amber. You should put new pads on your Chevy and replace or repair the rotors. 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. This leads to excessive pedal travel. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. 8. C. Both technicians a. Beginner's Guide: What is ABS (and How Does It Work)? d. Metering valve. a. a. 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. All the other answers could occur. Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. This also reduces braking power. If you don't know what to look for, have a mechanic who knows what they are doing and are reputable to inspect the brakes. a. Who is correct? 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. Which of the following can cause brake system dragging? 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. d. A faulty power booster. A routine inspection would include all of the following EXCEPT. 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. Thus, there are many ways to design a lens that has a particular focal length in air. 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. In Fig. A brake pad that is semi-metallic will be noisier than a non-asbestos or ceramic pad. A rotor face must be within .0005 inch of being parallel and flat with no more than .003 inch of runout. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. ASE identifies suspension both . A vehicle has a very erratic brake pulling concern while applying the brakes. a. You shouldn't waste your valuable time trying to rebuild it. Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). HubPages is a registered trademark of The Arena Platform, Inc. Other product and company names shown may be trademarks of their respective owners. 100100100 A only Who is right? All of these would cause a low brake pedal, EXCEPT: 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. What could be the issue? Technician B says the test involves checking the level of vacuum supplied by the engine or vacuum pump. Worn drums may also cause shuddering or pulsating that will become noticeable once you step on the pedal. c. Replacing a ball joint a-drum brakes If the slide pins are your problem, they need to be cleaned and lubricated or replaced. You can verify the wheel speed sensor operation while comparing the four-wheel outputs to the data list. b. Replace the defective part. Meanwhile, pull up on the handle just enough to feel the rear brakes grab slightly. B. b. A only c. Both A and B It's a vital component in your car; leave it to the pros. B only A only Frozen caliper piston d. Neither A nor B, A wheel speed sensor is being diagnosed using the OEM (original equipment manufacturer) diagnostic scan tool. The wheel cylinder is attached to the ________. With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. Who is correct? B. Technician A says a defective proportioning valve could be the cause. This pedal adjustment is crucial, and if adjusted too tightly, the vent port of the master cylinder can become blocked. This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. Answer A, zero brake pedal free travel, will cause a dragging brake condition, but not pulsation. If you were to remove the line at the master cylinder and at the caliper, could you blow compressed air through it? Correct answer D-Both technicians are wrong. Technician B says backing off the castle nut will cause the bearing to overheat. This braking problem can be caused by several different things, even the tires (see below), but the most common cause is a frozen caliper. 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. Technician A says the yaw rate and deceleration sensor should be recalibrated. If the vehicle has low or uneven tire pressure, there might be a pull. The same factors can cause cable operated parking brakes to jam up as well, requiring a replacement of the parking brake cable. 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. Which technician is most likely correct? a. Hard Pedal: You may have a loss of power assist because the engine vacuum is low. Answer B, glazed . tech A states that brake-by-wire means there is no mechanical or hydraulic connection between the break pedal and the wheel break units. You can do this test if your emergency brake handle is near the center console and it is the style that you pull up with your hand. Contact. Technician A Using the screwdriver, gently pry out the rubber grommet that protects this access cover. 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. Should I drive my car? A only Air and vaporized fluid are compressible and, if allowed into a hydraulic brake system, the brake pedal will feel spongy and the force transmitted to the lining will be reduced. The common cause of this is a broken or weak retracting spring on drum brakes, corroded or jammed caliper piston, corroded mounting pins or the bushings on a floating caliper, the drum brake self-adjusters are overextended or there is an emergency brake cable that is sticking or is frozen in place. The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. Another cause of a hard brake pedal can be a brake caliper that is stuck or seized. measure the pad-to-caliper piston clearance. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. A) Internal master cylinder leak B) Warped rotors C) Both A and B D) None of the above None of the above Use the lens-maker's equation to design three different thin diverging lenses, each having a focal length of 27.0cm27.0 \mathrm{~cm}27.0cm and each made from glass that has an index of refraction of 1.601.601.60. A only Then, it's easier to empty once it's out. However, it can also be due to fluid loss or a low fluid level. 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. Technician B says the cause could be a stuck closed residual check valve in the hose from the intake manifold to the power brake booster. Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. The brakes can fail if your hydraulic system or master cylinder is leaking. Answer: The grinding sound may be something caught between the backing plate and rotor. If the master cylinder is leaking externally, you will see fluid dripping from the place where the rod goes into the cylinder. a. It will not be caused by lateral runout, which would cause brake chattering or pulsing. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. 1. The wheel cylinder is attached to the ________. C. Dragging brakes A check valve that is faulty can also let vacuum bleed out. What is the most likely reason? 3 Basic Kinds of Valves in a Non-ABS System. What can cause brake drag, rear wheel lock up, or front wheel lockup upon breaking? Answer: I recommend checking the brake light switch, it may be out of adjustment and applying a little pressure to the brake pedal. 2320, what is the phase relationship between c. Both A and B After that, fixing it is often easy with the help of your Haynes manual. b. Arcing This difference in pressure happens when the line is pinched or kinked and leaves the brake unit applied and dragging. A bad master cylinder can introduce air into the lines, as can a failure at a caliper or wheel cylinder. Check your pads for any type of contamination. The other choices do not affect this concern. Scraping Brakes:Metal-to-metal sounds mean that the pads or shoes are worn out. When you remove the master cylinder, you must take all these steps EXCEPT: Correct answer D-Draining the master cylinder isn't required. 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 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. If there is a leak somewhere the fluid level may be so low as to make even the redundantsystem ineffective. A only To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The vehicle pulls to the side under heavy braking It also expands when subjected to high pressures. It sounds to me like some components aren't moving freely and are getting stuck causing the pulling and noises. The other three answers can lead to a low brake pedal. Check and make sure there is free play at the top of the brake pedal after driving and braking for a while, if there is no free play, something is out of adjustment. This brake pulsation can be fixed very easily by having your rotors resurfaced (which is cheaper) or replaced (more expensive). This valve basically allows the rear drums to apply first in the system. Residual check valve 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 you see the Brake Warning Light illuminated, it is probably a leak. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Return Springs: Weak or broken return springs will result in brake drag. A common symptom of this type of braking issue is a burning smell from the amount of heat the hung up brake generates. The star adjuster should be adjusted until there is a slight drag on the drum. a. Technician A says a parking brake not fully released could be the cause. 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. A car that pulls to one side can be annoying and also dangerous. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. The master cylinder, where it attaches to the brake pedal. B only Seized wheel cylinder piston Residual valves are used to maintain constant pressure on the brake system. Even today, your brakes can fail completely, but there are failsafes built into the system to prevent that from happening in most cases. Answer: Most likely your caliper is defective, if it were the master it would most likely be more then one brake caliper sticking. The rear brake linings are soaked with axle grease but still have a lot of lining left on them. Correct answer A-Air in the hydraulic system is the only choice that creates a spongy pedal. What do you think the problem might be? Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. A restricted disc brake caliper hose might cause all of these EXCEPT: 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. c. Both A and B d. Neither A nor B. A. I replaced master cylinder already. D. Neither Technician. They consist of the index of refraction of the lens and the radii of curvature for its two surfaces. Been there, done that! Dragging brakes must be repaired because it results in overheated parts and possible damage to the brake system. b. C. pumping the brake pedal 25 times with the ignition switch off 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! Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? Correct answer B-Having a seized caliper piston leads to a high pedal. That's why the power assist begins to function properly after the engine runs. 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. Then, it should be backed off until there's a drag on the wheel. One of the first symptoms of bad or failing drum brakes is unusual brake pedal feel. Here are five of the most common brake problems in cars. Technician A says the master cylinder pushrod adjustment is incorrect. The backing plate has holes stamped in it for all of the following to pass through, EXCEPT ______. Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. 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. 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.