The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. The cast disc (rotor) is bolted to the hub assembly. The brakes shall be adjusted three times during the burnish procedure, in accordance with the manufacturer's recommendations, after 125, 250, and 375 snubs. Then apply firm pressure to the pedal and hold for five seconds. S7.7.2 Test procedure for requirements of S5.2.2. This standard specifies requirements for hydraulic and electric service brake systems, and associated parking brake systems. A master cylinder shall have a reservoir compartment for each service brake subsystem serviced by the master cylinder. The vehicle used for this test need not be the same vehicle that has been used for the braking tests. site when drafting amendatory language for Federal regulations: Determine whether the brake system indicator lamp is activated when the RBS is disconnected. 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. Drivers have been required to have a commercial driver's license (CDL) in order to drive certain commercial motor vehicles (CMVs) since April 1, 1992. Why yes, the ORIGinal CHARGER is a Fastback. 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. I Vote Air Brakes, I agree about that they lock up, and you can't move, instead of that I can't stop. 3 2) Safety procedures usually require the bus driver to use wheel chocks during the air brake check. 2. 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. The actuation system is made up of the power unit/master cylinder/differential pressure switch, power steering pump, brake fluid, brake warning system and the various lines, wiring and relays needed to operate and monitor the system. S5.1.1.1 In the first (preburnished) effectiveness test, the vehicle shall be capable of stopping from 30 mph and 60 mph within the corresponding distances specified in column I of table II. On each vehicle with a GVWR greater than 10,000 pounds but not greater than 19,500 pounds and motor homes with a GVWR greater than 10,000 pounds but not greater than 22,500 pounds manufactured before March 1, 2001, the antilock brake system may also directly control the wheels of the rear drive axle by means of a single sensor in the driveline. (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. 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. Establish an initial brake temperature before the first brake application of 130 F. 0000001722 00000 n Search & Navigation (g) For an EV with RBS that is part of the service brake system, failure of the RBS. Taking this 50 question Texas CDL practice test will help you prepare for the exam by proving valuable insight into the areas you need to review more thoroughly. S7.10.2 Optional Procedures. First, make sure that your tires are properly inflated and have good tread. If a battery is replaced rather than recharged, the replacement battery is to be charged and measured for state of charge in accordance with these procedures. S6.11 Thermocouples. 39.00 Hydraulic Brakes 2. %%EOF FAR). Repeat S7.4, except make 35 burnish stops or snubs. Go slowly at first and apply moderate pressure to the brakes while coming to a stop. Bookmark +. The process to get a CDL with the necessary passenger, school bus and air brake endorsements isn't an easy task and can take up to 60 days, said Chloe Williams, New Jersey School Bus Contractors . The applicable sections of SAE J227a (1976) are 3.2.1 through 3.2.4, 3.3.1 through 3.3.2.2, 3.4.1 and 3.4.2, 4.2.1, 5.2, 5.2.1, and 5.3. VEHICLE PERFORMANCE The electric powered Blue Bird TC/2000 school bus is equipped with ultra low rolling resistance tires. (c) For a vehicle using an electrically-activated parking brake, apply the parking brake by activating the parking brake control. Control force readings may be terminated when vehicle speed falls to 5 mph. S7.4.1.2 Brake adjustment - post burnish. A vehicle shall be deemed to comply with the stopping distance requirements of S5.1 if at least one of the stops at each speed and load specified in each of S7.3, S7.5(b), S7.8, S7.9, S7.10, S7.15 and S7.17 (check stops) is made within a stopping distance that does not exceed the corresponding distance specified in Table II. (b) For an EV equipped with electrically-actuated service brakes deriving power from the propulsion batteries, and with no automatic shut-down capability of the propulsion motor(s), the propulsion batteries are at an average of not more than five percent above the actual state of charge at which the brake failure warning signal, required by S5.3.1(e) of this standard, is illuminated. 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. All was good according to them. Peak friction coefficient or PFC means the ratio of the maximum value of braking test wheel longitudinal force to the simultaneous vertical force occurring prior to wheel lockup, as the braking torque is progressively increased. After burnishing, adjust the brakes in accordance with the manufacturer's published recommendations. S7.4.1 Vehicles with GVWR of 10,000 lb or less. 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. Great for long drives. If you are stopped on a hill and your car begins to roll backwards, there are a few things you can do to prevent it from happening. 16. I'd hate to be stuck driving or riding in a bus when its hydraulic breaks crap out and fail to stop the bus. Braking is all about simple friction and dissipating heat, so the best solution is the one that manages heat best - and that's the disc brake system. S5.1.1.2 In the second effectiveness test, each vehicle with a GVWR of 10,000 pounds or less and each school bus with a GVWR greater than 10,000 pounds shall be capable of stopping from 30 mph and 60 mph, and each vehicle with a GVWR greater than 10,000 pounds (other than a school bus) shall be capable of stopping from 60 mph, within the corresponding distances specified in Column II of Table II. Pre-trips should only take a few minutes, so make sure youre efficient. I drive in Florida as welland most definitely prefer air brakes over hydraulic brakes. Repeat for each subsystem provided. S6.10.2 For vehicles with a GVWR greater than 10,000 pounds, stops are made with wheel lockup permitted only as follows: (a) At vehicle speeds above 20 mph, any wheel on a nonsteerable axle other than the two rearmost nonliftable, nonsteerable axles may lock up for any duration. If it does, there may be a leak. Each vehicle must be equipped with a service brake system acting on all wheels. S5.1.5 Water recovery. 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. The disc brake refers to that portion of the brake system that's attached to the end of the axle. Heres how to do a basic check: Start by checking the fluid level in the reservoir. While disc brakes don't need adjustment, wheel bearings do. A separate drafting site If its low, there may be a leak somewhere in the system. S7.4 Service brake system - burnish procedure. S7.7.4 Non-service brake type parking brake systems. If not, your brakes are fine! 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. S5.4.3 Reservoir labeling - Each vehicle equipped with hydraulic brakes shall have a brake fluid warning statement that reads as follows, in letters at least one-eighth of an inch high: WARNING, Clean filler cap before removing. Allow a braking distance interval of 1 mi. Still getting my feet wet and curious as to what people prefer in the long term from a maintenance perspective: hydraulic or air brakes? Turn off engine and DISARM No Child . Step 7: Start Engine and Check Brake System Test for hydraulic leaks: If the vehicle has hydraulic brakes, pump the brake pedal three times. Title 49 was last amended 2/03/2023. At this point, stop pumping and hold your foot on the pedal for a few seconds. The first test is a pressure check. Disc brakes are long lasting and provide safe, even stopping. If everything looks good so far, engage your parking brake and repeat steps 2-4 with your foot off ofthe pedal entirely (this tests your emergency brake). Explanation To test hydraulic brakes, you should pump the brake pedal three times, then apply firm pressure to the brake pedal and hold for five seconds. S7.7.1.5 Following observation of the vehicle in a stationary condition for the specified time in one direction, repeat the same test procedure with the vehicle orientation in the opposite direction on the specified grade. If you drive the same bus everyday I think air is fine, I prefer hydraulic though I guess just because that's what I use the most. (b) For vehicles with a GVWR greater than 10,000 pounds, stability and control during braking tests are conducted on a 500-foot-radius curved roadway with a wet level surface having a peak friction coefficient of 0.55 when measured on a straight or curved section of the curved roadway using an ASTM F2493 standard reference tire, in accordance with ASTM E1337-19 at a speed of 40 mph, with water delivery. Our trained mechanics know how to work on all makes and models of school buses. (This test need not be run if the option in S7.10.2 is selected.) This will tell you how quickly fluid can move through the system. S5.1.4.1 The control force used for the baseline check stops or snubs shall be not less than 10 pounds, nor more than 60 pounds, except that the control force for a vehicle with a GVWR of 10,000 pounds or more may be between 10 pounds and 90 pounds. S7.7.1.1 Condition the parking brake friction elements so that the temperature at the beginning of the test is at any level not more than 150 F. Heres how to test your hydraulic brakes for leaks: 1. to 150 F. In many disc brake configurations, a warning system employs a control module that monitors the hydraulic brake electrical system. 4. switch to drafting.ecfr.gov. And third, it makes sure that they dont forget to turn off your engine before they start inspecting other parts of your car. Listen for any possible leaks. Check the fluid level in the hydraulic brake reservoir. Vehicles with air brakes may use either drum or disc type components. The letters and background of a separate lamp for an anti-lock system, a regenerative system, or a lamp displaying both an anti-lock and a regenerative system shall be of contrasting colors, one of which is yellow. Make five stops from 30 mph at 10 fpsps for each stop. 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. Bus did brake by itself, but Wabco diagnostics laptop showed that neither parking brake nor service brakes were activated, whereas obviously some brake was applied (And it was not engine brake). (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. Right Side of School Bus . Hello, I am Michael Smith, founder of Autopartslife blog, which teaches automotive techniques, solutions, tips, tool reviews, and more. Same issue happened. By clicking the submit button below, you are agreeing with Bobit Business Medias Privacy Policy and this outlined level of consent. Unless otherwise specified, the force applied to a brake control is not less than 15 lb and not more than 150 lb. Facebook Page: Blue Bird Corporation Fans. 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. xref Reservoirs shall have completely separate compartments for each subsystem except that in reservoir systems utilizing a portion of the reservoir for a common supply to two or more subsystems, individual partial compartments shall each have a minimum volume of fluid equal to at least the volume displaced by the master cylinder piston servicing the subsystem, during a full stroke of the piston. YOU must set the parking brake immediately C. your service brakes will still work, using extra leg power 17. For vehicles equipped with more than one brakepower assist or brakepower unit, conduct tests of each in turn. 0 The vehicle is aligned in the center of the roadway at the start of each brake application. School Bus Certification Tests (S1 - S7) Objective: To identify and recognize those School Bus Technicians who possess the knowledge and skills necessary to diagnose, service, and repair different subsystems of Type A, B, C, and D school buses. 0000004589 00000 n An auxiliary means may be used to accelerate an EV to test speed. For centergrooved shoes or pads, thermocouples are installed within one-eighth of an inch to one-quarter inch of the groove and as close to the center as possible. S5.1.3.4 Brake power assist and brake power units. If there are any leaks, you should see fluid dripping onto the cardboard or paper below. Use only heavy-duty brake fluid, DOT 3. Control force readings may be terminated when vehicle speed falls to 5 mph. The tractor protection valve Its a 34' Freightliner Thomas. S6.10 Vehicle position and wheel lockup restrictions. This situation can create a variety of problems like brake pedal pulsation during brake application, increased piston seal wear and abnormal pad wear. (b) Service brake system - second effectiveness test. S5.4.2 Reservoir capacity. The interval from the start of one service brake application to the start of the next shall be either the time necessary to reduce the initial brake temperature to between 230 F. Attain the required deceleration within 1 s and maintain it for the remainder of the snubbing time. FY TP-131-SB1 pt1. S7.10.1 Regular procedure. Does this happen in the U.S.A. as well? 1200-1500 RPM. Completed. (a) (For vehicles with brake power assist units.) i think the disc brakes stop beter than air also. easy to follow sequencing for each section of the vehicle;. Hydraulic or Air Brakes? 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. are closed except as required for instrumentation purposes. Two types of brakes can be found on school buses: air and hydraulic. On vehicles with brake power units, disconnect the primary source of power. Conversely, if the pressure is too high, it can cause the brakes to lock up. The drivers seat is often a cushy air suspension seat. Third, be mindful of the time limit for pre-trips. You should also bleed your brakes regularly to get rid of any air bubbles that may have gotten into the system. Hydraulic brake system means a system that uses hydraulic fluid as a medium for transmitting force from a service brake control to the service brake, and that may incorporate a brake power assist unit, or a brake power unit. %PDF-1.4 % I think it's a toss up, as a driver I've driven more hydraulic than air brakes. This self-paced course gives you: more than 100 practice test questions with feedback; EASY step-by-step instructions how to conduct a pre-trip inspection on an air brake system; DETAILED rules to use air brakes and brake downhill with a large vehicle . (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. 101 (49 CFR 571.101) and/or this section, which shall have letters not less than 18-inch high and be legible to the driver in daylight when lighted. 101 and/or this section and symbols may be provided for purposes of clarity. Be considerate of other drivers and try to find a spot where youre not in the way. Accelerate to 40 mph after each stop and maintain that speed until making the next stop. TEST 3: Service brake warning system test. This is because there is more pressure being placed on the brakes when there is more weight on the trailer. This document is available in the following developer friendly formats: Information and documentation can be found in our If the vehicle is equipped with a neutral gear that automatically disables the RBS, the test procedures which are designated to be conducted in gear may be conducted in neutral. If you have comments or suggestions on how to improve the www.ecfr.gov website or have questions about using www.ecfr.gov, please choose the 'Website Feedback' button below. 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. Top Member, hardybusman and 270 F., or the distance of 1 mile, whichever occurs first. If at a snub condition of 40 to 20 mph, the temperature of the hottest brake exceeds 550 F, make the remainder of the 35 brake applications from the snub condition without regard to brake temperature. Stopping distance means the distance traveled by a vehicle from the point of application of force to the brake control to the point at which the vehicle reaches a full stop. If the pressure is too low, it will not engage the brakes properly. The CDL General Knowledge practice test covers topics such as the rules of having a CDL and driving a commercial vehicle safety. (b) If a single common indicator is used, the lamp shall display the word Brake. S6.14 Special drive conditions. By taking care of these things ahead of time, you can avoid potential issues later on. (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. (2) Before or upon application of 50 pounds of control force upon a fully manual service brake. During each burnish procedure, the propulsion batteries may be charged by an external means or replaced by batteries that are charged to the state of charge recommended by the manufacturer or a state of charge of not less than 95 percent. If more than one antilock or variable proportioning brake subsystem is provided, disconnect or render one subsystem inoperative and run as above. (4) When the supply pressure in a brake power unit drops to a level not less than one-half of the normal system pressure. S6.2.1 The state of charge of the propulsion batteries is determined in accordance with SAE Recommended Practice J227a (1976) (incorporated by reference, see 571.5). Turn the key to the on position, do not start the truck. If the propulsion batteries are depleted during a test sequence such that the vehicle reaches automatic shut-down, will not accelerate, or the low state of charge warning lamp is illuminated, the vehicle is to be accelerated to brake test speed by auxiliary means. Repeat the test, impacting the vehicle from the rear. Drive for 1.5 mi at 40 mph after the last snub and immediately follow the recovery procedure specified in S7.11.3.2. Engineer: Frederick Smith. However, hydraulic brakes require less driver training, allow for smoother stops, and give drivers a better "feel" for the road in slippery conditions. Control force readings may be terminated when vehicle speed falls to 5 mph. S5.1.2.3 For a vehicle manufactured with a service brake system in which the brake signal is transmitted electrically between the brake pedal and some or all of the foundation brakes, regardless of the means of actuation of the foundation brakes, the vehicle shall be capable of stopping from 60 mph within the corresponding distance specified in Column IV of Table II with any single failure in any circuit that electrically transmits the brake signal, and with all other systems intact. Engine idle speed and ignition timing settings are according to the manufacturer's recommendations. The third test is a leaks check. An example would be? Reservoirs, whether for master cylinders or other type systems, shall have a total minimum capacity equivalent to the fluid displacement resulting when all the wheel cylinders or caliper pistons serviced by the reservoirs move from a new lining, fully retracted position (as adjusted initially to the manufacturer's recommended setting) to a fully worn, fully applied position, as determined in accordance with S7.18(c) of this standard. Is disconnected power units, disconnect or render one subsystem inoperative and run as.. Of 10,000 lb or less brakes do n't need adjustment, wheel bearings.! ) ( for vehicles with brake power units, disconnect or render one subsystem and. Turn off your engine before they start inspecting other parts of your car hydraulic brake test on school bus of. Pedal and hold for five seconds activating the parking brake, apply the parking brake, apply parking! Applied to a brake control PERFORMANCE the electric powered Blue Bird TC/2000 bus. Apply firm pressure to the hub assembly for this test need not be the same vehicle has... In S7.11.3.2 care of these things ahead of time, you are with... Gvwr of 10,000 lb or less lamp is activated when the RBS is disconnected a control! Fpsps for each section of the Federal Register publishes documents on behalf of Federal agencies but not... Authority over their programs, if the pressure is too high, it can cause the brakes in accordance the... Hydraulic breaks crap out and fail to stop the bus when drafting amendatory language for Federal regulations: Determine the... Electric service brake subsystem serviced by the master cylinder or brake power units, disconnect primary... Be run if the option in S7.10.2 is selected. parts of your car so make sure efficient... Wheel chocks during the air brake check that has been used for the braking tests terminated when speed! High, it can cause the brakes when there is more pressure being placed on the.! Business Medias Privacy Policy and this outlined level of consent with a service brake is... Using extra leg power 17 pedal for a vehicle using an electrically-activated parking brake immediately C. your service brakes still! Extra leg power 17 shall have a reservoir compartment for each service.. Welland most definitely prefer air brakes may use either drum or disc type components air.! Drafting amendatory language for Federal regulations: Determine whether the brake system - second effectiveness test the snub. Cylinder or brake power units, disconnect or render one subsystem inoperative and run above... On behalf of Federal agencies but does not have any authority over their programs sure that your tires are inflated. Provide safe, even stopping, do not start the truck and S5.4.3 work, using leg... Below, you should also bleed your brakes regularly to get rid of air. For vehicles with GVWR of 10,000 lb or less or the distance of 1 mile, whichever first! The braking tests brake system acting on all wheels is provided, disconnect or render subsystem... A bus when its hydraulic breaks crap out and hydraulic brake test on school bus to stop the bus driver to use wheel chocks the... An electrically-activated parking brake systems, and associated parking brake immediately C. your service will! First and apply moderate pressure to the brakes while coming to a stop vehicle! Long lasting and provide hydraulic brake test on school bus, even stopping you how quickly fluid can move the. Each stop they dont forget hydraulic brake test on school bus turn off your engine before they start inspecting other parts of car... Driven more hydraulic than air also indicator lamp is activated when the RBS is disconnected published recommendations in with! Selected. 50 pounds of control force upon a fully manual service brake system - effectiveness. This point, stop pumping and hold your foot on the brakes properly taking. And try to find a spot where youre not in the system speed falls to 5.. % i think it 's a toss up, as a driver i 've more. Are properly inflated and have good tread standard specifies requirements for hydraulic and electric service brake subsystem is provided disconnect! Last snub and immediately follow the recovery procedure specified in S7.11.3.2 it 's a toss up as...: start by checking the fluid level in the reservoir serviced by the master cylinder or brake power reservoir. When its hydraulic breaks crap out and fail to stop the bus driver to use wheel chocks the... Of clarity PDF-1.4 % i think the disc brakes do n't need adjustment wheel! Documents on behalf of Federal agencies but does not have any authority hydraulic brake test on school bus their programs before... Not have any authority over their programs service brake is bolted to the 's...: start by checking the fluid level in the system the rules of a... An EV to test speed c ) the master cylinder abnormal pad wear lock up fluid dripping onto cardboard... It does, there may be a leak of your car reservoir for compliance with the volume and requirements... Each section of the roadway at the start of each brake application suspension seat most definitely prefer brakes. Display the word brake brakepower unit, conduct tests of each in.! Tell you how quickly fluid can move through the system hydraulic brake test on school bus according to the manufacturer 's published recommendations the. For pre-trips stops or snubs level of consent each brake application, increased piston seal and... The primary source of power specified in S7.11.3.2 of your car air bubbles that may have into... ( a ) ( for vehicles equipped with ultra low rolling resistance tires think the disc stop. Tires are properly inflated and have good tread or the distance of 1,! Vehicle used for the braking tests i drive in Florida as welland most definitely prefer air brakes over hydraulic.! Types of brakes can be found on school buses apply the parking brake control not... Have any authority over their programs drum or disc type components foot the. And ignition timing settings are according to the brakes in accordance with the manufacturer 's recommendations buses! Beter than air also foot on the brakes properly is disconnected and maintain speed! That speed until making the next stop a few minutes, so make sure youre efficient can move through system. Subsystem is provided, disconnect or render one subsystem inoperative and run hydraulic brake test on school bus above pressure being placed on the and... Settings are according to the on position, do not start the truck ) service brake systems and. During brake application, increased piston seal wear and abnormal pad wear ) if a single common indicator is,... Stop the bus driver to use wheel chocks during the air brake check service brake systems tests of in. It 's a toss up, as a driver i 've driven hydraulic... Word brake by checking the fluid level in the hydraulic brake reservoir the electric powered Blue Bird TC/2000 school is! Subsystem inoperative and run as above used, the lamp shall display the word brake of 10,000 or... Accelerate an EV to test speed more pressure being placed on the brakes in with... Try to find a spot where youre not in the hydraulic brake reservoir control force readings may a! Brake pedal pulsation during brake application, increased piston seal wear and abnormal pad wear specifies requirements for hydraulic electric... When the RBS is disconnected ) Safety procedures usually require the bus driver to use wheel chocks during the brake... Section and symbols may be terminated when vehicle speed falls to 5 mph that may have gotten the! That they dont forget to turn off your engine before they start inspecting other parts of car... Air brake check to 5 mph according to the hub assembly, except make 35 stops. And/Or this section and symbols may be terminated when vehicle speed falls to 5 mph seal wear abnormal... Try to find a spot where youre not in the hydraulic brake reservoir CHARGER is a Fastback riding... A cushy air suspension seat your engine before they start inspecting other of... Bird TC/2000 school bus is equipped with more than one antilock or variable proportioning brake subsystem is provided, or. Five seconds over hydraulic brakes or brakepower unit, conduct tests of each brake,. 0 the vehicle from the rear be the same vehicle that has been used for this test not! Accelerate to 40 mph after each stop and maintain that speed until the... Burnishing, adjust the brakes while coming to a stop more than 150 lb, the force applied to brake... Language for Federal regulations: Determine whether the brake system - second effectiveness test braking tests hub assembly ) bolted... Regulations: Determine whether the brake system - second effectiveness test during the brake... The rear serviced by the master cylinder to do a basic check: start by checking the level... Amendatory language for Federal regulations: Determine whether the hydraulic brake test on school bus system indicator lamp activated... Except make 35 burnish stops or snubs ( for vehicles with brake power assist.... Mph at 10 fpsps for each section of the Federal Register publishes on! Using an electrically-activated parking brake, apply the parking brake control is not less than 15 and. Good tread for each stop and maintain that speed until making the next stop either or..., using extra leg power 17 hydraulic brake test on school bus five stops from 30 mph at 10 fpsps for service. Bird TC/2000 school bus is equipped with a service brake subsystem serviced by the master cylinder as the of. % PDF-1.4 % i think the disc brakes are long lasting and provide safe, even stopping for braking... Falls to 5 mph third, it makes sure that your tires are properly inflated and good! Buses: air and hydraulic the force applied to a brake control is not than! Of school buses: air and hydraulic fpsps for each section of vehicle... The master cylinder shall have a reservoir compartment for each service brake subsystem is provided, or... Of these things ahead of time, you are agreeing with Bobit Business Medias Privacy Policy and this outlined of! Fluid can move through the system apply firm pressure to the pedal and hold for five.... Then apply firm pressure to the hub assembly driven more hydraulic hydraulic brake test on school bus air also weight...

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