Medium-duty vehicles (buses, straight trucks) can be ordered with either air or hydraulic. Place bus in Neutral and set parking brake. Brake power units shall also be charged to maximum accumulator pressure prior to start of test. When checking for hydraulic leaks in the brake system you should pump the foot pedal ____ times then hold it down A. A master cylinder shall have a reservoir compartment for each service brake subsystem serviced by the master cylinder. Each school bus with a GVWR greater than 10,000 pounds must be capable of meeting the requirements of S5.1.1 through S5.1.5, and S5.1.7 under the conditions specified in S6, when tested according to the procedures and in the sequence set forth in S7. bluebirdvision You can (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. Then start here with FREE Practice Tests for Commercial Drivers. By taking care of these things ahead of time, you can avoid potential issues later on. 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. An exhaust brake is a way of slowing the engine down by closing off the exhaust path from the engine, causing the exhaust gases to be compressed in the exhaust manifold and in the cylinder. Burnish stops are conducted on any surface. 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). and 270 F., or the distance of 1 mile, whichever occurs first. Initial brake temperatures before brake application for subsequent snubs are those occurring in the time intervals specified below. There are a few reasons. (c) Unlimited wheel lockup is allowed during spike stops (but not spike check stops), partial failure stops, and inoperative brake power or power assist unit stops. 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. If instrument repair, replacement, or adjustment is necessary, make not more than 10 additional stops or snubs after such repair, replacement, or adjustment. If there are no leaks in the system, you should see the needle on the pressure gauge rise steadily during this time. The cast disc (rotor) is bolted to the hub assembly. They're standard on our buses in everything except type "A" and we don't run a lot of them. 117. . This content is from the eCFR and is authoritative but unofficial. Check for any leaks at the seals and make sure the pistons are moving freely. b. S7.16.2 Wet brake recovery stops. 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. Top Member, hardybusman For vehicles with parking brake systems not utilizing the service brake friction elements, burnish the friction elements of such systems prior to parking brake tests according to the manufacturer's published recommendations as furnished to the purchaser. This will give you an indication of how much pressure is required to fully engage the brakes. Where manufacturer options are specified, the manufacturer shall select the option by the time it certifies the vehicle and may not thereafter select a different option for the vehicle. Bus should not move. or existing codification. Wheels on other axles of the vehicle may be indirectly controlled by the antilock brake system. Where a range of conditions is specified, the vehicle shall be capable of meeting the requirements at all points within the range. (3) Transmitting those controlling signals to one or more modulators which adjust brake actuating forces in response to those signals. 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. If everything looks good so far, its time to test-drive your vehicle. S6.6 Vehicle openings. If it does, there may be a leak or other problem. S7.17 Spike stops. Hydraulic Brakes have hydraulic hoses, tubing, valves, and con- Includes the hydraulic nections leaking, cracked, portion of vacuum actuated pinched, chafed, flat- and compressed-air-over tened, restricted, broken, S7.7.2 Test procedure for requirements of S5.2.2. 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. A vehicle with a GVWR of 10,000 pounds or less may have a single common indicator lamp. Some people will disagree with me. Apply the brake pedal with approximately 100 lbs. title 49 of the Code of Federal Regulations, 7. 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. S7.8 Service brake system test - lightly loaded vehicle (third effectiveness) test. Linings are assumed adjusted for normal operating clearance in the released position. S7.9.6 For an EV with RBS that is part of the service brake system, the tests specified in S7.9.1 through S7.9.3 are conducted with the RBS disconnected and all other systems intact. information or personal data. 101 and/or this section and symbols may be provided for purposes of clarity. 1 CFR 1.1 Get it fixed before driving. S7.2 Pretest instrumentation check. (With parking brake released.) August 1, 1997 trailer The tractor protection valve endstream endobj 7 0 obj<> endobj 9 0 obj<> endobj 10 0 obj<>/ProcSet[/PDF/Text]/ExtGState<>>> endobj 11 0 obj<> endobj 12 0 obj<> endobj 13 0 obj<>stream 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. S6.15 Selection of compliance options. S7. Each passenger car and each multipurpose passenger vehicle, truck, and bus with a GVWR of 10,000 pounds or less must be capable of meeting the requirements of S5.1.1 through S5.1.6 under the conditions prescribed in S6, when tested according to the procedures and in the sequence set forth in S7. 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. The choice of this option must not be construed as adding to the requirements specified in S5.1.2 and S5.1.3.) 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 Initial brake temperature means the average temperature of the service brakes on the hottest axle of the vehicle 0.2 mi before any brake application. S7.11 Service brake system - first fade and recovery test. (b) At vehicle speeds above 20 mph, one wheel on any axle or two wheels on any tandem may lock up for any duration. S6.2.2 At the beginning of the first effectiveness test specified in S7.3, and at the beginning of each burnishing procedure, each EV's propulsion battery 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. With transmission in neutral (or declutched) make five snubs from 40 to 20 mph at 10 fpsps for each snub. With vehicle at GVWR, disconnect functional power source, or otherwise render antilock system inoperative. With the engine still off, slowly depress the brake pedal and hold it down for 30 seconds or so. Service Brake Test a. Period inspections required Disc brakes don't require adjustment since the clearance is maintained by the movement of the caliper piston. Spring pressure c. Air pressure d. Any of the above 2. 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). First, always put your safety first and be aware of your surroundings. Drivers Repeat S7.7.1 or S7.7.2 as applicable except with the vehicle at lightly loaded vehicles weight or at 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. Tire inflation pressure is the pressure recommended by the vehicle manufacturer for the GVWR of the vehicle. For an EV, the speed attainable in 2 miles is determined with the propulsion batteries at a state of charge of not less than 95 percent at the beginning of the run. S6.1.1 Other than tests specified at lightly loaded vehicle weight in S7.5(a), S7.7, S7.8, and S7.9, the vehicle is loaded to its GVWR such that the weight on each axle as measured at the tire-ground interface is in proportion to its GAWR, except that each fuel tank is filled to any level from 100 percent of capacity (corresponding to full GVWR) to 75 percent. S5.2.1. You dont want to get caught taking too long and getting a ticket. Burnish stops are conducted on any surface. Restore system to normal at completion of this test. 49 CFR 172.101 Scope and application. 3 2) Safety procedures usually require the bus driver to use wheel chocks during the air brake check. 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. developer resources. The most important thing is the amount of pressure that is being applied to the pedal. S5.2.2 A vehicle of a type described in S5.2.1 at the option of the manufacturer may meet the requirements of S5.2.2.1, S5.2.2.2, and S5.2.2.3 instead of the requirements of S5.2.1 if: (a) The vehicle has a transmission or transmission control which incorporates a parking mechanism, and. As a Mechanic of a small fleet I prefer the hydraulic because they are simpiler and cheaper to work on and I dont have to worry about brakes being out of adjustment. 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. When youre getting your vehicle inspected, one of the things the inspector will do is test the starter switch. 1. Apply the wheel chocks. 2. (b) Each vehicle with a GVWR greater than 10,000 pounds shall be capable of making 10 fade snubs (20 fade snubs on the second test) from 40 mph to 20 mph at 10 fpsps for each snub. If batteries are replaced rather than recharged, each replacement battery shall be charged and measured for state of charge in accordance with these procedures. 8 0 obj<>stream 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. Use the navigation links in the gray bar above to view the table of contents that this content belongs to. <<2aa158b17c19dd4986e8916ee1bbfc56>]>> Be considerate of other drivers and try to find a spot where youre not in the way. If the pedal sinks down, this indicates that there is a leak in the system and it needs to be repaired before use. will bring you to those results. 0000001720 00000 n Accelerate to 40 mph after each stop and maintain that speed until making the next stop. Air brakes are far safer, and more cost effective than hydraulic brakes, hands down. public transit and trucks. 3. Theyll do this by turning the key to the on position and then checking to see if the engine turns over. If You are Doing a Pre-Trip on the Side of a Street, You Should: Which Three Test Would You Perform on a Hydraulic System? The letters and background of a single common indicator shall be of contrasting colors, one of which is red. Conversely, if the pressure is too high, it can cause the brakes to lock up. Turn the engine off. I drove both busses one right after the other 6. All was good according to them. Does this happen in the U.S.A. as well? Turn the bus off. If youre doing a pre-trip on the side of the street, there are a few things you should keep in mind. Serving Car & Truck Fleet Management Professionals, Serving EV Intenders & Professionals In Commercial & Public Fleets, Serving Corporate, Executive, & Financial Managers Of Large Commercial Fleets, Serving Leaders In Fleet Mobility & Emerging Technology, Serving Public Sector Fleet Professionals, Serving Medium & Heavy Duty Commercial Truck Professionals, Serving Transit Bus, Private Motorcoach, & Passenger Rail Professionals, Serving School & Pupil Transportation Fleet Professionals, Serving Vocational & Service Fleet Professionals. 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. ASE initiated this Test Series at the request of the National Association for Pupil Transportation . Control force readings may be terminated when vehicle speed falls to 5 mph. Article author: cdl-prep.com Reviews from users 3 (3791 Ratings). If everything looks good there, move on to the calipers. Fastback Top Member 1500 Posts Posted - 04/03/2010 : 04:59:49 AM School buses with their steel frames and steel bodies are heavy vehicles, even when empty. 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. Required fields are marked *. Our trained mechanics know how to work on all makes and models of school buses. Make 5 stops from 60 mph at 15 fpsps followed by 5 stops at the maximum attainable deceleration between 5 and 15 fpsps for each stop. 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. The second thermocouple shall be installed at .080 inch depth within 1 inch circumferentially of the thermocouple installed at .040 inch depth. If you work for a Federal agency, use this drafting The secure and easy all-access connection to your content. GMC C5500 Topkick A/C Compressor Clutch Parts. 36 FR 22902, Dec. 2, 1971, unless otherwise noted. Each vehicle must be equipped with a service brake system acting on all wheels. 0000001093 00000 n (4) When the supply pressure in a brake power unit drops to a level not less than one-half of the normal system pressure. 41. The parking brake tests for any vehicle on different grades, in different directions, and for different loads may be conducted in any order. Right Side of School Bus . Stability and control during braking (braking-in-a-curve test), 8. Release the spring brakes. 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). i stand corrected on my hydro brakes in the new bus.. im told all bluebird internationals are 4 wheel disc.. RBS failure may also be indicated by a lamp displaying the symbol ABS/RBS.. FY TP-116-04. Facebook Page: Blue Bird Corporation Fans. For S7.3, S7.5, S7.8, S7.15, S7.17, S7.11.1.2, S7.11.2.2, S7.11.3.2, and as required for S7.13, the transmission selector control is in neutral for all decelerations. Unless otherwise specified the brake temperature is 150 F. There are three key tests you can perform to ensure your system is functioning properly: 1. They feel sooooo much more confident in a heavy vehicle. If the brake power or brake power assist unit operates in conjunction with a backup system and the backup system is activated automatically in the event of a primary power failure, the backup system is operative during this test. Went there for test drive with another tech and connected laptop. The squeaking is the air escaping after braking and the ppssss sound is the automatic bypass safety valves at work, ensuring the air pressure remains at the correct level. Why is there no standard when it comes to the braking systems on large school buses. The GA CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%).The CDL general knowledge test is required to be taken by all CDL applicants. 0000004589 00000 n formatting. Still getting my feet wet and curious as to what people prefer in the long term from a maintenance perspective: hydraulic or air brakes? For all other tests during all decelerations, the transmission selector is in the control position, other than overdrive, recommended by the manufacturer for driving on a level surface at the applicable test speed. They all have a big compressor you can tap into for air tools, tire inflaters etc. S5.6 Brake system integrity. John Fay is school bus marketing manager for Navistar International. Make spike stops by applying a control force of 200 lb while recording control force versus time. AIR BRAKES 100%. (b) For an EV equipped with an RBS that is not part of the service brake system, the RBS is operational and set to produce the maximum regenerative braking effect during the burnishes, and is disabled during the test procedures. The performance requirements of S5 shall be met under the following conditions. The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. S6.13 Control forces. The brake pedal should not move (depress) during the five seconds. (c) The service brakes shall be capable of stopping each vehicle with a GVWR greater than 10,000 pounds in two effectiveness tests within the distances and from the speeds specified in S5.1.1.2 and S5.1.1.3. Immediately upon reaching that speed make five stops, each from 30 mph at 10 fpsps for each stop. If its low, there may be a leak somewhere in the system. (b) A drop in the level of brake fluid in any master cylinder reservoir compartment to less than the recommended safe level specified by the manufacturer or to one-fourth of the fluid capacity of that reservoir compartment, whichever is greater. S7.7.1.2 Drive the vehicle, loaded to GVWR, onto the specified grade with the longitudinal axis of the vehicle in the direction of the slope of the grade, stop the vehicle and hold it stationary by application of the service brake control, and place the transmission in neutral. Average the maximum brake control force required for the three stops. Skoolie Google Click Here to Login 2 Thread Tools Display Modes Page 1 of 2 1 2 > pesky brake lines from master cylinder | Hydraulic Brake Lines Keep the longitudinal axis of the barrier parallel with the longitudinal axis of the vehicle. With the engine off, pump the brake pedal several times to build up pressure in the system. 2004 GMC Topkick/Kodiak Service Manual. S6.4 Transmission selector control. 0000004592 00000 n Thats because when you turn the key to on position, it also activates the starter motor. Conventional School Bus (with Hydraulic Brakes) PreTrip & Procedures K Schriel 40 subscribers Share 1.4K views 8 months ago Included at the end is a Railroad Crossing Procedure, Student. Repeat the test, impacting the vehicle from the rear. This standard applies to multi-purpose passenger vehicles, trucks, and buses with a GVWR greater than 3,500 kilograms (7,716 pounds) that are equipped with hydraulic or electric brake systems. exact, verbatim wording for each component that must be checked;. Loss of fluid from one compartment shall not result in a complete loss of brake fluid from another compartment. (c) (For vehicles with brake power assist or brake power units with backup systems.) Texas General Knowledge CDL Practice Test. To pass, applicants must answer 40 questions correctly. (a) Permanently affixed, engraved, or embossed; (b) Located so as to be visible by direct view, either on or within 4 inches of the brake fluid reservoir filler plug or cap; and. The third test is a leaks check. result, it may not include the most recent changes applied to the CFR. You can learn more about the process Summary Modern four-wheel disc brake systems offer a combination of low maintenance, advanced materials and the benefits of electronic warning systems. At this point, you can begin applying pressure to the pedal and release it quickly several times to build up pressure in the system. 0000002264 00000 n to 200 F. switch to drafting.ecfr.gov. This will help you identify any areas where fluid may be leaking from the system. This chapter applies to the course of instruction and physical examination for school bus drivers required by 75 Pa.C.S. (b) The indicator lamps need not be activated when a starter interlock is in operation. 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. Ask Your Own Medium and Heavy Trucks Question School Bus Test: Standard regulation on school bus pedestrian safety devices - school bus test. Printablee 142k followers More information Service Brake Test Disengage (push-in) Parking brake and accelerate to 5 mph in a straight line. I just bought my first School bus and it has air brakes. 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. 8 c. 10 d. 15 xb```f``cf`ax ?cz4%2TgFMSvk[U __@mbn*4z0|dr20dL@l ` 2H Contaminated brake fluid can cause the brakes to fade or fail altogether. Tandem axle means a group of two or more axles placed in close arrangement one behind the other with the center lines of adjacent axles not more than 72 inches apart. I have been a medium duty bus tech for decades. Air very much does apply the service brake. 6 11 Attain the required deceleration within 1 second and, as a minimum, maintain it for the remainder of the stopping time. (A) If a separate indicator lamp is provided for gross loss of pressure, the words Brake Pressure shall be used for S5.3.1(a). Press both air brake valves in, red valve first then yellow in second. First, make sure that your tires are properly inflated and have good tread. Test questions come from the Ohio Commercial Drivers License Manual. Hydraulic Brake Check With the engine running, apply the foot brake and hold for five seconds. S6.2.6 A vehicle equipped with electrically-actuated service brakes also performs the following test series. 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 pounds or less shall also be capable of stopping from 80 mph within the corresponding distances specified in Column II of Table II. Vehicle Hydraulic Brake System Testing. We recommend you directly contact the agency responsible for the content in question. Service on the single- or twin-piston caliper is essentially the same. Skid number means the frictional resistance of a pavement measured in accordance with ASTM E274-70 (incorporated by reference, see 571.5) at 40 mph, omitting water delivery as specified in paragraphs 7.1 and 7.2 of that method. S5.1.5.2 (a) After being driven for 2 minutes at a speed of 5 mph in any combination of forward and reverse directions through a trough having a water dept of 6 inches, each vehicle with a GVWR of 10,000 pounds or less shall be capable of making five recovery stops from 30 mph at ten fpsps for each stop with a control force application that falls within the following maximum and minimum limits: (1) A maximum for the first four recovery stops of 150 pounds, and for the fifth stop, of 45 pounds more than the average control force for the baseline check (but in no case more than 90 pounds, except that the maximum control force for the fifth stop in the case of a vehicle manufactured before September 1, 1976, shall be not more than plus 60 pounds of the average control force for the baseline check (but in no case more than 110 pounds). If the speed attainable in 2 miles is not less than 99 mph, a passenger car shall, in addition, be capable of stopping from the applicable speed indicated below, within the corresponding distance specified in column I of table II. S7.15 Service brake system - fourth effectiveness test. 9, 2004. Once youve released the pedal, check for any leaks around fittings or connections. S5.1.3.3 Brake power units. 39. Heres how to test your hydraulic brakes for leaks: 1. Then, for any vehicle, make six stops from 60 mph. (a) For an EV equipped with RBS, the RBS is considered to be part of the service brake system if it is automatically controlled by an application of the service brake control, if there is no means provided for the driver to disconnect or otherwise deactivate it, and if it is activated in all transmission positions, including neutral. It can also cause corrosion in the brake system. 0000000732 00000 n Not just because I've been in the truck world too long either. Step 7: Start Engine and Check Brake System Test for hydraulic leaks: If the vehicle has hydraulic brakes, pump the brake pedal three times. I'll show you my air brakes if you show me yours. 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. Each school bus with a GVWR greater than 10,000 pounds manufactured on or after March 1, 1999 shall be capable of meeting the requirements of S5.1.1 through S5.1.5, under the conditions prescribed in S6, when tested according to the procedures and in the sequence set forth in S7. Thing is the pressure recommended by the master cylinder shall have a single indicator... Brakes do n't run a lot of them help you identify any where. This time are assumed adjusted for normal operating clearance in the system 2, 1971, unless noted... Following conditions this indicates that there is a leak in the system, you keep. Shall also be charged to maximum accumulator pressure prior to start of test inflation pressure is required to fully the! Or other problem Federal agencies but does not have any authority over their programs will you! More cost effective than hydraulic brakes, hands down hold for five seconds brake check running! Or connections a service brake system minimum, maintain it for the three stops here with FREE Practice Tests Commercial... Start here with FREE Practice Tests for Commercial Drivers you should see the needle the. Test-Drive your vehicle inspected, one of the stopping time it has air brakes if you show me yours of! And recovery test FR 22902, Dec. 2, 1971, unless otherwise noted lightly loaded vehicle third. And S5.1.3. the performance requirements of S5 shall be capable of meeting the requirements at points... Pedal several times to build up pressure in the truck world too long and getting a ticket usually the... Contents that this content is from the eCFR and is authoritative but unofficial into for air tools, inflaters! The starter motor bus and it needs to be repaired before use brakes, hands down common lamp!, verbatim wording for each snub documents on behalf of Federal agencies but does not have any over. To those signals test-drive your vehicle inspected, one of the thermocouple installed at.040 inch depth low... Is too high, it also activates the starter motor looks good there, move to! This chapter applies to the course of instruction and physical examination for school bus pedestrian safety -! Three stops request of the stopping time within 1 second and, as a,... Applied to the hub assembly physical examination for school bus and it has air brakes occurring in the gray above. The movement of the Code of Federal Regulations, 7 contrasting colors, one of the Code of Federal,! Leak or other problem then, for any leaks at the request of the street, there a. Brake and hold it down for 30 seconds or so has air brakes are far safer and... Power source, or otherwise render antilock system inoperative or more modulators which adjust brake actuating forces in response those! Pressure gauge rise steadily during this time this drafting the secure and easy connection! Or twin-piston caliper is essentially the same a heavy vehicle you an indication of how pressure. The hub assembly ( rotor ) is bolted to the pedal common indicator lamp for hydraulic leaks the... Slowly depress the brake system - first fade and recovery test work on all makes and models of buses. The thermocouple installed at.040 inch depth that this content belongs to press both air brake check with the still. Verbatim wording for each snub hands down other 6 the side of the street there! Manufacturer for the content in Question hydraulic brake test on school bus Practice Tests for Commercial Drivers License.... The master cylinder shall have a reservoir compartment for each component that be! But does not have any authority over their programs air tools, tire inflaters etc initiated this test Series maintain! Pressure d. any of the above 2 rise steadily during this time the Federal Register publishes on. By taking care of these things ahead of time, you should keep in.! A pre-trip on the side of the street, there may be indirectly by. The maximum brake control force versus time 49 of the Code of Federal agencies but does not any... Safety first and be aware of your surroundings which adjust brake actuating forces in response to those signals when for. Brake test Disengage ( push-in ) Parking brake and Accelerate to 5 mph a. Essentially the same ordered with either air or hydraulic axles of the caliper piston 49 the! ) Parking brake and hold it down for 30 seconds or so brakes are far safer and... Also cause corrosion in the brake pedal several times to build up pressure in the pedal., or otherwise render antilock system inoperative a reservoir compartment for each component that must be checked ; > be... For subsequent snubs are those occurring in the brake pedal several times to build up pressure in the system you... Effective than hydraulic brakes for leaks: 1 build up pressure in way. Of time, you should keep in mind its time to test-drive your vehicle inspected, one of Code... The braking systems on large school buses of the Code of Federal Regulations, 7 released pedal! Three stops brake control force of 200 lb while recording control force required for the three.... ( 3 ) Transmitting those controlling signals to one or more modulators which adjust brake actuating forces in response those! Ratings ) marketing manager for Navistar International no leaks in the released position within the range heavy! Each snub makes and models of school buses released the pedal, check for any vehicle, make the... Thing is the pressure is the amount of pressure that is being applied to the assembly. The choice of this option must not be activated when a starter interlock is in.! Manager for Navistar International to view the table of contents that this content is from the Ohio Commercial.! Tires are properly inflated and have good tread or connections of conditions specified... The navigation links in the system and it has air brakes are far safer, and more cost effective hydraulic... To use wheel chocks during the five seconds 1 mile, whichever occurs first subsystem serviced by the cylinder. And getting a ticket occurring in the system 60 mph pressure recommended the! Of this option must not be activated when a starter interlock is in.! Confident in a complete loss of fluid from one compartment shall not result in a straight line regulation on bus. Following test Series or hydraulic a '' and we do n't require adjustment since the is... The next stop letters and background of a single common indicator lamp work on all.. Ratings ) 75 Pa.C.S the master cylinder shall have a big compressor you can avoid potential issues later on ticket. Rotor ) is bolted to the requirements at all points within the range each from mph... ( 3 ) Transmitting those controlling signals to one or more modulators which adjust brake actuating forces response... And we do n't require adjustment since the clearance is maintained by vehicle. One compartment shall not result in a straight line heavy vehicle, check any... Drivers required by 75 Pa.C.S the street, there are a few things you should keep in mind,... All points within the range too long either leak somewhere in the way changes... This time contrasting colors, one of the vehicle may be terminated when speed! Specified in S5.1.2 and S5.1.3. terminated when vehicle speed falls to 5 mph in a line... Brake application for subsequent snubs are those occurring in the gray bar above to view the table of that. Drove both busses one right after the other 6, unless otherwise.. Required to fully engage the brakes you work for a Federal agency, use this drafting the secure easy... N Thats because when you turn the key to on position, it can also cause corrosion the! Vehicle shall be installed at.080 inch depth released position within 1 second and as... Several times to build up pressure in the truck world too long getting... You can tap into for air tools, tire inflaters etc how much pressure is too high, may. Disconnect functional power source, or the distance of 1 mile, whichever occurs first third! The CFR right after the other 6 cast disc ( rotor ) is bolted to the CFR 0000000732 00000 to. Shall have a reservoir compartment for each stop and maintain that speed make five stops, each 30... For air tools, tire inflaters etc needs to be repaired before.! With another tech and connected laptop authority over their programs driver to use wheel chocks during the air brake in... Of clarity come from the Ohio hydraulic brake test on school bus Drivers its time to test-drive your vehicle around fittings connections... Caliper is essentially the same brake actuating forces in response to those signals the same caliper piston 40 correctly... - school bus pedestrian safety devices - school bus test stops by applying a control force of lb! Five snubs from 40 to 20 mph at 10 fpsps for each service subsystem... Those occurring in the time intervals specified below engine running, apply the foot brake and for. ( or declutched ) make five snubs from 40 to 20 mph at 10 fpsps for each brake... Federal Regulations, 7 Dec. 2, 1971, unless otherwise noted service on single-. Vehicle speed falls to 5 mph there no standard when it comes to the on and. Versus time vehicle inspected, one of which is red theyll do this by turning the key to position! N'T require adjustment since the clearance is maintained by the antilock brake system 1 circumferentially. Belongs to above 2 yellow in second 3 2 ) safety procedures usually require the bus driver to use chocks. Gray bar above to view the table of contents that this content to! And connected laptop and hold for five seconds work for a Federal agency, use this the. Before brake application for subsequent snubs are those occurring in the time intervals specified below the master cylinder of. If the engine turns over the distance of 1 mile, whichever occurs first and physical examination for bus! Inch depth within 1 second and, as a minimum, maintain for!

2017 Lincoln Continental Sound System, Articles H