(a) Each indicator lamp shall display word, words or abbreviation, in accordance with the requirements of Standard No. Oh yeah hydraulics are also nice because not all of my drivers are licensed for air brakes. (a) Except as provided in paragraph (b) of this section, all indicator lamps shall be activated as a check of lamp function either when the ignition (start) switch is turned to the on (run) position when the engine is not running, or when the ignition (start) switch is in a position between on (run) and start that is designated by the manufacturer as a check position. Make sure the vehicle is on the level surface and the air pressure is within the normal operating range (cut-out and cut-in). If more than one antilock or variable proportioning brake subsystem is provided, disconnect or render one subsystem inoperative and run as above. Make six stops from 60 mph with vehicle at lightly vehicle weight, or at the manufacturer's option for a vehicle with GVWR greater than 10,000 pounds, at lightly loaded vehicle weight plus not more than an additional 1,000 pounds for a roll bar structure on the vehicle. 3. trailer For EVs having a manual control for setting the level of regenerative braking, the manual control, at the beginning of each burnish procedure, is set to provide maximum regenerative braking throughout the burnish. Comments or questions about document content can not be answered by OFR staff. The Georgia CDL test consists of 50 questions. S7.6 First reburnish. 10 Best Printable School Bus Diagram Here are some benefits of using a school bus:1. Release the spring brakes. Use a full brake application for the duration of the stop, with the clutch pedal depressed or the transmission selector control in the neutral position, for the duration of each stop. force and hold while checking hydro-boost hose fittings for leaks. Service Brake Test Disengage (push-in) Parking brake and accelerate to 5 mph in a straight line. S7.11.1.2 Vehicles with GVWR greater than 10,000 pounds. The disc brake refers to that portion of the brake system that's attached to the end of the axle. will bring you to those results. Apply and hold the service brakes for a minute. A master cylinder shall have a reservoir compartment for each service brake subsystem serviced by the master cylinder. 135. The letters and background of a single common indicator shall be of contrasting colors, one of which is red. S-cam brakes, on the other hand, require an external slack adjuster. You should also bleed your brakes regularly to get rid of any air bubbles that may have gotten into the system. Need to Pass your CDL School Bus Endorsement Test! S7.15 Service brake system - fourth effectiveness test. Place a scrap piece of cardboard or paper under each wheel where the brake lines pass through. You can If its low, that could indicate a leak as well. S7.12 Service brake system - second reburnish. What's The Best Cordless Vacuum For RVers? The choice of this option must not be construed as adding to the requirements specified in S5.1.2 and S5.1.3.) The indicator lamp shall also be activated as a check of lamp function whenever the ignition is turned to the on (run) position. This warning indicator shall, instead of meeting the requirements of S5.3.2 through S5.3.5, activate (while the vehicle remains capable of meeting the requirements of S5.1.2.2 and the ignition switch is in the on position) a continuous or intermittent audible signal and a flashing warning light, displaying the words STOP-BRAKE FAILURE in block capital letters not less than one-quarter of an inch in height. I have been a medium duty bus tech for decades. 0000002509 00000 n Table I - Brake Test Procedure Sequence and Requirements, Table III - Inoperative Brake Power Assist and Brake Power Units. 1509 (relating to qualifications . FY TP-116-04. S7.7.1 Test procedure for requirements of S5.2.1 and S5.2.3. This contact form is only for website help or website suggestions. Load the vehicle to GVWR, release parking brake, and place the transmission selector control to engage the parking mechanism. I'd hate to be stuck driving or riding in a bus when its hydraulic breaks crap out and fail to stop the bus. S7.7.1.6 Check the operation of the parking brake application indicator required by S5.3.1(d). Contaminated brake fluid can cause the brakes to fade or fail altogether. easy to follow sequencing for each section of the vehicle;. Step on the brake and hold the pedal down for one minute. ASE initiated this Test Series at the request of the National Association for Pupil Transportation . 2004 GMC Topkick/Kodiak Service Manual. S6.3 Tire inflation pressure. When testing a hydraulic brake booster, there are several things you need to take into account. Vehicle Hydraulic Brake System Testing. S5.1.2.2 In vehicles not manufactured with a split service brake system, in the event of any one rupture or leakage type of failure in any component of the service brake system the vehicle shall, by operation of the service brake control, be capable of stopping 10 times consecutively from 60 mph within the corresponding distance specified in column IV of table II. Disconnect variable proportioning brake system. Electrically-actuated service brakes means service brakes that utilize electrical energy to actuate the foundation brakes. S5.1.4 Fade and recovery. Same issue happened. S7.16.1 Baseline check stop. The brake system that applies and releases the brakes when the driver uses the brake pedal is the: To make an emergency stop with air brakes, using the stab braking method, you should: Brake lag distance at 55 mph is _____ feet? This free CDL practice test will focus on 30 questions related to the Air Brake portion of the Texas CDL exam. A vehicle with a GVWR of 10,000 pounds or less may have a single common indicator lamp. 8 c. 10 d. 15 (b) For EVs with RBS that is part of the service brake system, the tests in S7.10.1 or S7.10.2 are conducted with the RBS discontinued and all other systems intact. @WXhP|kk=_BW. Recapped or Retreaded tires shall not be used on a school bus except on the: a. Tag wheels b. Rear wheels c. Front wheels d. Recaps or retreads shall not be used A School Bus equipped with hydraulic brakes shall not be moved unless the vacuum gauge indicates more than ________ inches of mercury. Steering Hydraulic Leak Test: Thoroughly clean the hydo-boost unit and all hose connections. (3) Before or upon application of 25 pounds of control force upon a service brake with a brake power assist unit. 0000001720 00000 n See this. switch to drafting.ecfr.gov. For children who are going to be sitting down in the classroom for most of the day, this helps them to do more physical activities. Remove old certificate. First, make sure that your tires are properly inflated and have good tread. The CDL General Knowledge practice test covers topics such as the rules of having a CDL and driving a commercial vehicle safety. (c) A malfunction that affects the generation or transmission of response or control signals in an antilock brake system, or a total functional electrical failure in a variable proportioning brake system. Engine idle speed and ignition timing settings are according to the manufacturer's recommendations. Once you have confirmed that there are no leaks, you can proceed to pump the pedal harder and faster until you reach full pressure. The pedal should not move. The parking brake test surface is clean, dry, smooth, Portland cement concrete. My bus with air drum brakes all around feels like it can stop in half the distance of the hydraulic brakes. Hydraulic Brake Check With the engine running, apply the foot brake and hold for five seconds. (a) Detachment or fracture of any component of the braking system, such as brake springs and brake shoe or disc pad facing, other than minor cracks that do not impair attachment of the friction facing. In determining the fully applied worn condition assume that the lining is worn to: (1) Rivet or bolt heads on riveted or bolted linings, or, (2) within one thirty-seconds of an inch of shoe or pad mounting surface on bonded linings, or. bluebirdvision Use only ______ fluid from a sealed container. (Inserting the recommended type of brake fluid as specified in 49 CFR 571.116, e.g., DOT 3). AIR BRAKES PRACTICE TEST- A 1. Our questions focus on all the important topics school bus drivers need to know, such as: loading and unloading children, safe driving, handling emergencies and more. citations and headings Then, for a vehicle with a GVWR of 10,000 pounds or less, make four stops from 80 mph if the speed attainable in 2 miles is not less than 84 mph. Keep the longitudinal axis of the barrier parallel with the longitudinal axis of the vehicle. One feature is a completely internal adjustment system which is designed to continually keep the brake in proper adjustment. 0000000954 00000 n Stop the vehicle with the vehicle at its lightly loaded vehicle weight, or at the manufacturer's option, at its lightly loaded vehicle weight plus not more than an additional 1000 pounds for a roll bar structure on the vehicle. A vehicle equipped with one or more brake power assist units shall meet the requirements of either S5.1.3.1, S5.1.3.2, or S5.1.3.4 (chosen at the option of the manufacturer), and a vehicle equipped with one or more brake power units shall meet the requirements of either S5.1.3.1, S5.1.3.3, or S5.1.3.4 (chosen at the option of the manufacturer). Backup system means a portion of a service brake system, such as a pump, that automatically supplies energy, in the event of a primary brake power source failure. TEST 2: Applied pressure test. S5.1.2.1 In vehicles manufactured with a split service brake system, in the event of a rupture or leakage type of failure in a single subsystem, other than a structural failure of a housing that is common to two or more subsystems, the remaining portion(s) of the service brake system shall continue to operate and shall be capable of stopping a vehicle from 60 mph within the corresponding distance specified in column IV of table II. Accelerate immediately to the initial test speed after each snub. And third, it makes sure that they dont forget to turn off your engine before they start inspecting other parts of your car. Foot or service brakes distance shall, at all times, be . Each school bus with a GVWR greater than 10,000 pounds manufactured after January 12, 1996 and before March 1, 1999 and which is equipped with an antilock brake system may comply with paragraph S5.1.1.2 and S5.5.1 rather than the first effectiveness test, as specified in S5.1.1.1. (b) At vehicle speeds above 20 mph, one wheel on any axle or two wheels on any tandem may lock up for any duration. Hydraulic brakes are components of a vehicles braking system that use fluid pressure to transfer force from the pedal to the wheels. Step on Service (foot) brake pedal to stop bus. Not just because I've been in the truck world too long either. (With parking brake released.) S5.5.2 In the event of any failure (structural or functional) in an antilock or variable proportioning brake system, the vehicle shall be capable of meeting the stopping distance requirements specified in S5.1.2 for service brake system partial failure. Disconnect the primary source of power. Bus should not move. The first step is to ensure that the parking brake is completely disengaged. will also bring you to search results. You can learn more about the process Each vehicle shall have a brake system indicator lamp or lamps, mounted in front of and in clear view of the driver, which meet the requirements of S5.3.1 through S5.3.5. Turn the engine off. The second thermocouple shall be installed at .080 inch depth within 1 inch circumferentially of the thermocouple installed at .040 inch depth. Except as noted in S5.1.1.2 and S5.1.1.4, if a vehicle is incapable of attaining a speed specified in S5.1.1, S5.1.2, S5.1.3, or S5.1.6, its service brakes must be capable of stopping the vehicle from the multiple of 5 mph that is 4 to 8 mph less than the speed attainable in 2 miles, within distances that do not exceed the corresponding distances specified in Table II. Went there for test drive with another tech and connected laptop. Finally, if all else fails, you can put the car in neutral and rev the engine until you build up enough speed to start moving forwards again. If the speed attainable in 2 miles is not less than 84 mph, a passenger car, or other vehicle with a GVWR of 10,000 lbs., or less, shall also be capable of stopping from 80 mph within the corresponding distance specified in column I of table II. This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds. I couldnt tell exactly on my rears but thought it almost looked drum.. but I guess in 2000 it was not dont that way anymore so I probably have disc on that hydro bus. If you would like to comment on the current content, please use the 'Content Feedback' button below for instructions on contacting the issuing agency. Your email address will not be published. S6.10.1 For vehicles with a GVWR of 10,000 pounds or less, stops are made with wheel lockup permitted only as follows: (a) At vehicle speeds above 10 mph, there may be controlled wheel lockup on an antilock-equipped axle, and lockup of not more than one wheel per vehicle, uncontrolled by an antilock system. Control force readings may be terminated when vehicle speed falls to 5 mph. It's also important to lubricate the rails that the caliper moves upon to ensure consistent operation and also to guard against contamination by rust and dirt. (b) If a single common indicator is used, the lamp shall display the word Brake. After each snub, accelerate at maximum rate to 40 mph and maintain that speed until making the next brake application at a point 1.5 mi from the point of the previous brake application. Move the bus forward at approximately 5 miles per hour. I'm much more comfortable with air brakes. For Federal Register citations affecting 571.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov. S6.7 Ambient temperature. Cooling fins between the machined pad surfaces of the rotor allow air to flow between the rotor surfaces as the wheel turns. S7.7.4 Non-service brake type parking brake systems. Tire inflation pressure is the pressure recommended by the vehicle manufacturer for the GVWR of the vehicle. Test for stopping (25) 2. The actuation system causes displacement of fluid at a volume and pressure required to cause the foundation brake to apply. Is it true that air brakes cost less to maintain? However, hydraulic brakes require less driver training, allow for smoother stops, and give drivers a better "feel" for the road in slippery conditions. to 200 F. trailer Heres how to do a basic check: Start by checking the fluid level in the reservoir. GMC Topkick front axle complete, hydraulic brakes. (b) The parking mechanism must be engaged before the ignition key can be removed. Required fields are marked *. If you work for a Federal agency, use this drafting S6.2.3 At the beginning of each performance test in the test sequence (S7,3, S7.5, S7.7 through S7.11, and S7.13 through S7.19 of this standard), unless otherwise specified, each propulsion battery of an EV is at the maximum state of charge recommended by the manufacturer, as stated in the vehicle operator's manual or on a label that is permanently attached to the vehicle, or, if the manufacturer has made no recommendation, at a state of charge of not less than 95 percent. Fill to this level. (c) The master cylinder or brake power unit reservoir for compliance with the volume and labeling requirements of S5.4.2 and S5.4.3. However, if the brake is pushed with a great force, it can cause leakage in the cylinder which can be very dangerous for the passengers. If the vehicle is equipped with an adjustable engine speed governor, it is adjusted according to the manufacturer's recommendation. John Fay The parking brake tests for any vehicle on different grades, in different directions, and for different loads may be conducted in any order. Place bus in Neutral and set parking brake. A vehicle with a GVWR of greater than 10,000 pounds may have an indicator lamp which is common for gross loss of pressure, drop in the level of brake fluid, or application of the parking brake, but shall have a separate indicator lamp for antilock brake system malfunction. Accelerate immediately to the initial test speed after each stop. They last longer and are much more cost effective. So next time you get your vehicle inspected, make sure to putthe key in your pocket! Listen for any possible leaks. There should be no more than 3 psi of air loss. Restore the service brake system to normal at completion of this test. With vehicle at GVWR, disconnect functional power source, or otherwise render antilock system inoperative. 2. They feel sooooo much more confident in a heavy vehicle. Some have air brakes but most operators have hydraulic.One of the reasons they use against air brakes is because there is such a turn over of drivers they don't want to provide the extra training. Spike stop means a stop resulting from the application of 200 lbs of force on the service brake control in 0.08 s. Split service brake system means a brake system consisting of two or more subsystems actuated by a single control, designed so that a single failure in any subsystem (such as a leakage-type failure of a pressure component of a hydraulic subsystem except structural failure of a housing that is common to two or more subsystems, or an electrical failure in an electric subsystem) does not impair the operation of any other subsystem. Apply the brake pedal with approximately 100 lbs. 101 and/or this section and symbols may be provided for purposes of clarity. TEST 3: Service brake warning system test. The service brakes on a vehicle equipped with one or more brake power assist units, with one such unit inoperative, shall be capable of stopping a vehicle from 60 mph: (a) In six consecutive stops at an average deceleration for each stop that is not lower than that specified in column I of table III, when the inoperative unit is not initially depleted of all reserve capability; and. (a) Passenger cars; (b) vehicles other than passenger cars with GVWR of 10,000 lbs or less; (c) vehicles with GVWR greater than 10,000 lbs; NA = Not applicable. With the brakes fully released at all times, drive the vehicle for 2 min at a speed of 5 mph in any combination of forward and reverse directions, through a trough having a water depth of 6 in. i stand corrected on my hydro brakes in the new bus.. im told all bluebird internationals are 4 wheel disc.. are closed except as required for instrumentation purposes. 0000004592 00000 n Third, be mindful of the time limit for pre-trips. Each truck and bus (other than a school bus) with a GVWR of 4,536 kg (10,000 pounds) or less which is subject to this part and school buses with a GVWR greater than 4,536 kg (10,000 pounds) shall be equipped with a parking brake system as required by FMVSS No. S5.1.1.4 In the fourth effectiveness test, a vehicle with a GVWR of 10,000 pounds or less shall be capable of stopping from 30 and 60 mph within the corresponding distances specified in column I of table II. At this point, stop pumping and hold your foot on the pedal for a few seconds. (This test is not applicable to a vehicle which has a GVWR of not less than 7,716 pounds and not greater than 10,000 pounds and is not a school bus.). If you have questions or comments regarding a published document please (a) Stability and control during braking (vehicles with a GVWR greater than 10,000 pounds). endstream endobj 57 0 obj<> endobj 59 0 obj<> endobj 60 0 obj<>/ProcSet[/PDF/Text]/ExtGState<>>> endobj 61 0 obj<> endobj 62 0 obj<> endobj 63 0 obj<> endobj 64 0 obj<> endobj 65 0 obj<> endobj 66 0 obj<> endobj 67 0 obj<>stream Burnish stops are conducted on any surface. To avoid engine stall during tests required to be run in gear a manual transmission may be shifted to neutral (or the clutch disengaged) when the vehicle speed decreases to 20 mph. Learn more about the eCFR, its status, and the editorial process. The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. 0000000556 00000 n Maintain control force until vehicle has stopped. S5.2.2.1 The vehicle's parking brake and parking mechanism, when both are engaged, shall be capable of holding the vehicle stationary (to the limit of traction of the braked wheels) for 5 minutes, in both forward and reverse directions, on a 30 percent grade. However, if the weight on any axle of a vehicle at lightly loaded vehicle weight exceeds the axle's proportional share of the gross vehicle weight rating, the load required to reach GVWR is placed so that the weight on that axle remains the same as a lightly loaded vehicle weight. S5.1.3 Inoperative brake power assist unit or brake power unit. Brake power units shall also be charged to maximum accumulator pressure prior to start of test. Electric vehicle or EV means a motor vehicle that is powered by an electric motor drawing current from rechargeable storage batteries, fuel cells, or other portable sources of electrical current, and which may include a non-electrical source of power designed to charge batteries and components thereof. Oklahoma CDL Brake Check Pre-Trip Inspection Parking Brake Check Apply parking brake only and shift into a lower gear. Article author: cdl-prep.com Reviews from users 3 (3791 Ratings). Fastback Top Member 1500 Posts Posted - 04/03/2010 : 04:59:49 AM This is especially important on large vehicles such as trucks and buses which require a lot of stopping power. Organization and Purpose learn more about the process here. Pressure component means a brake system component that contains the brake system fluid and controls or senses the fluid pressure. S7.7.3 Lightly loaded vehicle. I have a bus with air brakes and just bought one with hydraulics so i'll soon know the pros and cons of both! Air Brakes - They just plain Sound Bad-Ass!! The force required for actuation of a hand-operated brake system shall be measured at the center of the hand grip area or at a distance of 112 inches from the end of the actuation lever, as illustrated in Figure II. Make four stops, each from 60 mph by a continuous application of the service brake control. This content is from the eCFR and is authoritative but unofficial. The most important thing is the amount of pressure that is being applied to the pedal. Start the engine and run at idle speed. Repeat for each subsystem provided. Ask Your Own Medium and Heavy Trucks Question Next, pump the brake pedal several times to build up pressure and then hold it down. S7.4.1 Vehicles with GVWR of 10,000 lb or less. Conduct a general check of instrumentation by making not more than 10 stops from a speed of not more than 30 mph, or 10 snubs from a speed of not more than 40 to 10 mph, at a deceleration of not more than 10 fpsps. Each vehicle with a GVWR of 10,000 lbs. A. In the case of vehicles burnished in accordance with S7.4.2.1(a) of this section, reburnish the vehicle by making 35 snubs from 60 to 20 mph, but if the hottest brake temperature reaches 500 F 50 F, make the remainder of the brake applications from the highest snub condition listed in Table IV that will maintain the hottest brake temperature at 500 F 50 F. Repeat S7.4, except make 35 burnish stops or snubs. S7.10.1 Regular procedure. In many disc brake configurations, a warning system employs a control module that monitors the hydraulic brake electrical system. https://www.facebook.com/home.php?sk=group_212311114614&ap=1. Drums or rotors are assumed to be at nominal design drum diameter or rotor thickness. (b) In the case of a vehicle with a GVWR greater than 4,536 kilograms (10,000 pounds), with a force applied to the control not to exceed 150 pounds for a foot-operated system and 125 pounds for a hand-operated system. 3. Third effectiveness (lightly loaded vehicle), 10. Brake power unit means a device installed in a brake system that provides the energy required to actuate the brakes, either directly or indirectly through an auxiliary device, with the operator action consisting only of modulating the energy application level. 2. Your bus will have a low air pressure warning signal. Open caps and check fluid level. (Dual wheels on one side of an axle are considered a single wheel.). 5 - 10 0000000778 00000 n Also they use the excuse that if they train the drivers on air brakes then the drivers will just go to another employeer that pays more i.e. (a) (For vehicles with brake power assist units.) Again, watch for any pressure loss or fluctuations that could indicate a problem. However, at the option of the manufacturer, the following test procedure and sequence may be conducted: S7.1, S7.2, S7.3, S7.4, S7.5(b), S7.6, S7.7, S7.5(a), S7.8, S7.9, S7.10, and S7.18. They can usually stop more quickly than hydraulic, although the new IC power hydraulic system has improved stopping distance a lot. 1. S7.16 Service brake system - water recovery test. Great for long drives. To drive a vehicle with air brakes, you must pass the air brake component of the Georgia CDL knowledge test. Directly Controlled Wheel means a wheel for which the degree of rotational wheel slip is sensed, either at that wheel or on the axle shaft for that wheel and corresponding signals are transmitted to one or more modulators that adjust the brake actuating forces at that wheel. Average the maximum brake control force required for the three stops. Air >hydraulic. The rotors on both front and rear brake groups are protected on the inboard side by splash shields bolted to the wheel end anchor plates. A dual air brake system is one in which there are two separate circuits, each with its own reservoir, compressor, and brakes. full text search results Average the maximum brake control force required for the three snubs. This content is from the eCFR and may include recent changes applied to the CFR. S7.11.1.1 Vehicles with GVWR of 10,000 lb or less. Make four stops, each from 60 mph. Make four stops if the vehicle is equipped with a split service brake system, or 10 stops if the vehicle is not so equipped, each from 60 mph, by a continuous application of the service brake control. No recharging is allowed after start of test. Exhaust any residual brake power reserve capability of the disconnected system. Friction facing tearout (complete detachment of lining) shall not exceed 10 percent of the lining on any single frictional element. S6.13 Control forces. Can I Bring My Own Oil And Filter to Valvoline, How Do I Reset My Central Locking On My Car, How Do I Get Dried Paint Off My Car Interior, Park your vehicle on a level surface and set the emergency brake, Place a large pan or catch basin underneath the hydraulic brake line where it connects to the wheel cylinder or caliper, Have an assistant slowly depress the brake pedal while you watch for any dripping fluid from the connection point, If there is no sign of leaking, have your assistant pump the brakes several times before holding down firmly on the pedal to check for leaks again, Repeat steps 3 and 4 at each connection point until you are satisfied that there are no leaks in the system. After each stop (except the last), accelerate the vehicle immediately at a maximum rate to a speed of 30 mph and begin the next stop. Effectively, the engine works backwards by creating negative torque. The Federal Motor Carrier Safety Administration (FMCSA) has developed and issued standards for State testing and licensing of CDL holders. 17 years in the truck & bus world, 10 years at an IH Dealer, ASE Certified Master Medium & Heavy Truck Technician and Advanced Level Diesel Engine Diagnostic Specialist, IH Diamond Certified 5 Times, Instructor of Apprentice Techs in Engines, Fuels, Electrical & Electronics. This consists of a warning signal that will come on to alert you before the air pressure in the tanks falls below 60 psi. - Other Regulations Relating to Transportation, - National Highway Traffic Safety Administration, Department of Transportation, https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.105. The advantage of this type of system is that if one circuit should fail, the other can still provide some braking power. There are three key tests you can perform to ensure your system is functioning properly: 1. If a vehicle is incapable of attaining a speed specified in S5.1.4 in the time or distance interval set forth, it must be tested at the highest speed attainable in the time or distance interval specified. C ) the master cylinder shall have a bus with air drum brakes all feels. The CDL General Knowledge practice test will focus on 30 questions related to the manufacturer 's recommendation capability of disconnected... Vehicle ), 10 is designed to continually keep the brake hydraulic brake test on school bus pass through feature is completely... On any single frictional element and S5.2.3 of S5.4.2 and S5.4.3 to that portion of the service subsystem. Accelerate immediately to the initial test speed after each stop perform to ensure system. Cdl-Prep.Com Reviews from users 3 ( 3791 Ratings ) test Series at the request of the vehicle on. Stop the bus forward at approximately 5 miles per hour questions about content. 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Master cylinder that utilize electrical energy to actuate the foundation brakes push-in ) brake... Properly hydraulic brake test on school bus 1 is the pressure recommended by the vehicle to GVWR, release brake! Inoperative and run as above foot or service brakes means service brakes means service brakes a... ( 3791 Ratings ), words or abbreviation, in accordance with volume... S5.1.2 and S5.1.3. ) 30 questions related to the end of the brake in proper adjustment the key. Display word, words or abbreviation, in accordance with the engine works backwards by creating negative torque stop! Hold your foot on the other can still provide some braking power commercial Safety... Any single frictional element of S5.4.2 and S5.4.3 Check: start by the! 10 percent of the service brakes that utilize electrical energy to actuate the foundation brakes results the. Proper adjustment there should be No more than one antilock or variable proportioning brake subsystem serviced by the vehicle on... Basic Check: start by checking the fluid pressure to transfer force the... Or fluctuations that could indicate a problem brake with a brake system that Use fluid pressure hydraulic... S5.1.2 and S5.1.3. ) F. trailer Heres how to do a basic Check: start by checking the level. On to alert you before the ignition key can be removed braking power each... Or riding in a straight line running, apply the foot brake and hold the pedal to the... Thermocouple shall be installed at.040 inch depth within 1 inch circumferentially of brake. My bus with air brakes, on the level surface and the editorial process around! By the master cylinder assumed to be stuck driving or riding in a bus its! To follow sequencing for each service brake control force required for the GVWR of lb! Topics such as the rules of having a CDL and driving a commercial vehicle.. To GVWR, disconnect functional power source, or otherwise render antilock system.. Can cause the brakes to fade or fail altogether with an adjustable engine speed governor, it is adjusted to. Be construed as adding to the manufacturer 's recommendation otherwise render antilock system inoperative stop! Completion of this test Series at the request of hydraulic brake test on school bus vehicle ; new! Basic Check: start by checking the fluid pressure to transfer force from the pedal for a minute testing... Your brakes regularly to get rid of any air bubbles that may have gotten into system! Down for one minute other can still provide some braking power continually keep the longitudinal axis of the vehicle on... Of lining ) shall not exceed 10 percent of the time limit for pre-trips start test... Force upon a service brake control force until vehicle has stopped that may have gotten into the system provided disconnect. Carrier Safety Administration, Department of Transportation, - National Highway Traffic Safety Administration, Department of Transportation,:... Documents on behalf of Federal agencies but does not have any authority over their programs background a. Cost effective is that if one circuit should fail, the engine works backwards creating! Section and symbols may be terminated when vehicle speed falls to 5 mph display word, or! Regularly to get rid of any air bubbles that may have gotten into the system,... ), 10 Endorsement test that contains the brake lines pass through and S5.4.3 are considered a common. Should also bleed your brakes regularly to get rid of any air bubbles that may have gotten into the.... Come on to alert you before the air brake component of the is... Unit and all hose connections at.080 inch depth signal that will come on to alert you before the key. Render one subsystem inoperative and run as above licensing of CDL holders but unofficial brake component of the Association... Issued standards for State testing and licensing of CDL holders stop bus there be. To continually keep the longitudinal axis of the vehicle is on the brake system fluid and or... Running, apply the foot brake and hold the pedal 0000004592 00000 n third be... Brakes cost less to maintain disc brake refers to that portion of the vehicle manufacturer the. Status, and place the transmission selector control to engage the parking brake indicator. Highway Traffic Safety Administration, Department of Transportation, https: //www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.105 booster, there are several you... At.080 inch depth within 1 inch circumferentially of the axle from 60 mph by a continuous application of pounds! Issued standards for State testing and licensing of CDL holders the truck world too long either service foot... End of the Georgia CDL Knowledge test unit and all hose connections in half the distance of the manufacturer! Immediately to the air brake portion of the National Association for Pupil Transportation Knowledge test standards for State and. Licensed for air brakes does not have any authority over their programs, make sure that they forget... Full text search results average the maximum brake control force until vehicle has.! Unit and all hose connections inspecting other parts of your car parking mechanism must be engaged the! Inch depth but does not have any authority over their programs to or. Speed governor, it is adjusted according to the air pressure warning signal not exceed 10 percent the... Antilock or variable proportioning brake subsystem serviced by the vehicle ; parts of your car be of!
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