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. View the most recent official publication: These links go to the official, published CFR, which is updated annually. 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. Automatic adjusters must remain activated at all times. A straight truck or bus air brake system would not leak at a rate of more than how many PSI per . Please do not provide confidential S7.9.2 Repeat S7.9.1 for each of the other subsystems. (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. If it does, there may be a leak. Hydraulic Brake Check With the engine running, apply the foot brake and hold for five seconds. Control force readings may be terminated when vehicle speed falls to 5 mph. (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. If no recommendations are furnished, run the vehicle in an unburnished condition. will also bring you to search results. Repeat S7.4, except make 35 burnish stops or snubs. Each modulator may also adjust the brake actuating forces at other wheels that are on the same axle or in the same axle set in response to the same signal or signals. How many seconds should you apply pressure to the brake pedal while doing a hydraulic brake check? Any brake fluid or power steering fluid leak A Snub means the braking deceleration of a vehicle from a higher reference speed to a lower reference speed that is greater than zero. The force applied to the brake pedal by the driver must be sufficient to provide enough braking power so that the vehicle stops smoothly and under control. (b) For vehicles manufactured on and after September 1, 1999 with GVWRs greater than 10,000 lbs, each message about the existence of a malfunction, as described in S5.3.1(c), shall be stored in the antilock brake system after the ignition switch is turned to the off position and the indicator lamp shall be automatically reactivated when the ignition switch is again turned to the on position. 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. 7, Hydraulic Brake Reservoir It is in keeping with a concern for safety that the four-wheel disc brake system has become the brake of choice for the school bus industry. If the pedal sinks down, this indicates that there is a leak in the system and it needs to be repaired before use. If the vehicle does not remain stationary, reapplication of the service brake to hold the vehicle stationary, with reapplication of a force to the parking brake control at the level specified in S7.7.1.3 (a) or (b) as appropriate for the vehicle being tested (without release of the ratcheting or other holding mechanism of the parking brake) may be used twice to attain a stationary position. Burnish stops are conducted on any surface. The service brakes of a vehicle equipped with one or more brake power assist units or brake power units with a backup system, with one brake power assist unit or brake power unit inoperative and depleted of all reserve capability and with only the backup system operating in the failed subsystem, shall be capable of stopping the vehicle from 60 mph in 15 consecutive stops at an average deceleration for each stop that is not lower than 12 fpsps (equivalent stopping distance 323 feet). If batteries are replaced rather than recharged, each replacement battery shall be charged and measured for state of charge in accordance with these procedures. So why putthe starter switch key in your pocket duringthe vehicle inspection? Hydraulic brakes are used on passenger vehicles and use brake fluid to operate the brakes. Facebook Page: Blue Bird Corporation Fans. (c) For a vehicle using an electrically-activated parking brake, apply the parking brake by activating the parking brake control. 6 0 obj<> endobj 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. FY TP-131-SB1 pt1. Brake fluid is the most common problem in a brake hydraulic system. 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. S1. S5.1.1.3 In the third effectiveness test the vehicle shall be capable of stopping at lightly loaded vehicle weight from 60 mph within the corresponding distance specified in column III of table II. Wheels on other axles of the vehicle may be indirectly controlled by the antilock brake system. This chapter applies to the course of instruction and physical examination for school bus drivers required by 75 Pa.C.S. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. Still getting my feet wet and curious as to what people prefer in the long term from a maintenance perspective: hydraulic or air brakes? The cast disc (rotor) is bolted to the hub assembly. The types of vehicles and operations requiring a CDL are outlined below. However, hydraulic brakes require less driver training, allow for smoother stops, and give drivers a better "feel" for the road in slippery conditions. S7.9 Service brake system test - partial failure. If it does, there may be a leak or other problem. For this you will need to know the parts of a single and dual air brake system, how to inspect and use them. HWn}W#Xwy76 (Ipj.Z. Dave Heiden CLP, you must be at least 18 years old. Start the engine and run at idle speed. (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). This consists of a warning signal that will come on to alert you before the air pressure in the tanks falls below 60 psi. If everything looks good so far, its time to test-drive your vehicle. This content is from the eCFR and is authoritative but unofficial. 571.105 (S5.2) in effect at the time of manufacture. S7.11.3.2 Vehicles with GVWR greater than 10,000 lb. S6.2.5 For tests conducted in neutral, the operator of an EV with no neutral position (or other means such as a clutch for disconnecting the drive train from the propulsion motor(s)) does not apply any electromotive force to the propulsion motor(s). 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. @WXhP|kk=_BW. (B) The average control force for the baseline check times 0.60. whichever is lower (but in no case lower than 5 pounds). Vehicles with air brakes may use either drum or disc type components. The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The third test is a leaks check. Place a scrap piece of cardboard or paper under each wheel where the brake lines pass through. Texas General Knowledge CDL Practice Test. 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. 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? Heres how to do a basic check: Start by checking the fluid level in the reservoir. 2004 GMC Topkick/Kodiak Service Manual. The brake pedal should not move (depress) during the five seconds. (b) In a final stop, at an average deceleration that is not lower than 7 FPSPS for passenger cars (equivalent stopping distance 554 feet) or 6 FPSPS for vehicles other than passenger cars (equivalent stopping distance 646 feet), as applicable, when the inoperative unit is depleted of all reserve capacity. (a) The parking brake system on a multipurpose passenger vehicle, truck or bus (other than a school bus) with a GVWR of 4,536 kilograms (10,000 pounds) or less shall be capable of holding the vehicle stationary for 5 minutes, in both forward and reverse directions, on a 20 percent grade. S5.1.5 Water recovery. developer resources. 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. trailer parking brake on. Comments or questions about document content can not be answered by OFR staff. YOU must set the parking brake immediately C. your service brakes will still work, using extra leg power 17. S5.5 Antilock and variable proportioning brake systems. Wear of the service brake must be compensated for by means of a system of automatic adjustment. 0000002585 00000 n Make four stops, each from 60 mph by a continuous application of the service brake control. So if the key is in your pocket, they wont be able to tell if the starter switch is working or not. (3) Before or upon application of 25 pounds of control force upon a service brake with a brake power assist unit. OEM-specified brake lining and pads are recommended when replacement is necessary. Better stopping power. 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. And third, it makes sure that they dont forget to turn off your engine before they start inspecting other parts of your car. Compliance of vehicles manufactured in two or more stages may, at the option of the final-stage manufacturer, be demonstrated to comply with this standard by adherence to the instructions of the incomplete manufacturer provided with the vehicle in accordance with 568.4(a)(7)(ii) and 568.5 of title 49 of the Code of Federal Regulations. When checking for hydraulic leaks in the brake system you should pump the foot pedal ____ times then hold it down A. Tire inflation pressure is the pressure recommended by the vehicle manufacturer for the GVWR of the vehicle. 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. Step on the service brake to make sure the bus doesn't pull to either side. 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. 0000000556 00000 n If you would like to comment on the current content, please use the 'Content Feedback' button below for instructions on contacting the issuing agency. (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. For whatever reason, I feel more in control. This blog post will provide detailed information on how to properly conduct a hydraulic brake test on a school bus. (E) If a separate indicator is used for the regenerative brake system, the symbol RBS may be used. Ask Your Own Medium and Heavy Trucks Question Each brake power unit reservoir servicing only the brake system shall have a minimum capacity equivalent to the fluid displacement required to charge the system piston(s) or accumulator(s) to normal operating pressure plus the displacement resulting when all the wheel cylinders or caliper pistons serviced by the reservoir or accumulator(s) move from a new lining fully retracted position (as adjusted initially to the manufacturer's recommended setting) to a fully worn, fully applied position. Which of the following makes the total stopping distance for air brakes longer than that for hydraulic brakes? Press both air brake valves in, red valve first then yellow in second. 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. I Vote Air Brakes, I agree about that they lock up, and you can't move, instead of that I can't stop. A vehicle with a GVWR of 10,000 pounds or less may have a single common indicator lamp. School buses with their steel frames and steel bodies are heavy vehicles, even when empty. Start your practice test now. Hydraulic Brake Check With the engine running, apply the foot brake and hold for five seconds. Table I - Brake Test Procedure Sequence and Requirements, Table III - Inoperative Brake Power Assist and Brake Power Units. 2. Maximum drive-through speed means the highest possible constant speed at which the vehicle can be driven through 200 feet of a 500-foot radius curve arc without leaving the 12-foot lane. 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. S6.2 Electric vehicles and electric brakes. here. Top rated: 3 Lowest rating: 1 Summary of article content: Articles about To test for leaks on hydraulic brake systems: - CDL prep To test for leaks on hydraulic brake systems:: Pump pedal 3 times, then apply firm pressure and hold, Pump pedal 3 times, then get out and look under the Once youve released the pedal, check for any leaks around fittings or connections. c. Test the bus a second time to make sure the bus stops properly. (b) Each vehicle with a GVWR of more than 10,000 pounds shall be capable of making five recovery snubs from 40 mph to 20 mph at 10 fpsps for each snub, with a control force application that falls within the following maximum and minimum limits: (1) A maximum for the first four recovery snubs of 150 pounds, and for the fifth snub, of 20 pounds more than the average control force for the baseline check (but in no case more than 100 pounds); and. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel . There are a few reasons. Foot or service brakes distance shall, at all times, be . Listen for any possible leaks. (g) For an EV with RBS that is part of the service brake system, failure of the RBS. S7.7.1 Test procedure for requirements of S5.2.1 and S5.2.3. Great prices on 1009 aftermarket and OEM GMC C6500 Topkick auto parts. Place bus in Neutral and set parking brake. Air brakes use air pressure to push against the brake pads, slowing or stopping the wheels from spinning. startxref For vehicles equipped with more than one brake power unit or brake power assist unit, conduct tests of each in turn. Turn off engine and DISARM No Child . S5.3 Brake system indicator lamp. Air breaks are pretty fail-safe. You also need to make sure that there is no air in the system, as this can cause problems with braking performance. The secure and easy all-access connection to your content. 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. Make 15 stops, each from 60 mph, with the backup system activated for the failed subsystem, to achieve an average deceleration of 12 fpsps for each stop. 49 U.S.C. To test the hydraulic brake booster, start by pumping the pedal slowly and evenly until you feel resistance. 71.1. 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 . Make six stops each from 60 mph, to achieve the average deceleration for each stop as specified in table III. Attain the required deceleration within 1 s and maintain it for the remainder of the snubbing time. Apply the brake control as quickly as possible. Then, for any vehicle, make six stops from 60 mph. 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. RBS failure may also be indicated by a lamp displaying the symbol ABS/RBS.. The most important thing is the amount of pressure that is being applied to the pedal. Antilock brake system or ABS means a portion of a service brake system that automatically controls the degree of rotational wheel slip during braking by: (1) Sensing the rate of angular rotation of the wheels; (2) Transmitting signals regarding the rate of wheel angular rotation to one or more controlling devices which interpret those signals and generate responsive controlling output signals; and. (a) For an EV equipped with electrically-actuated service brakes deriving power from the propulsion batteries, and with automatic shut-down capability of the propulsion motor(s), the propulsion batteries are at not more than five percent above the EV actual automatic shut-down critical value. ` PT, bPl ,y\BBK- } Application. (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. 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. S6.6 Vehicle openings. Check for any leaks at the seals and make sure the pistons are moving freely. S7.10.1 Regular procedure. Determine the control force, pressure level, or fluid level (as appropriate for the indicator being tested) necessary to activate the brake system indicator lamp. 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). If more than one antilock or variable proportioning brake subsystem is provided, disconnect or render one subsystem inoperative and run as above. Microsoft Edge, Google Chrome, Mozilla Firefox, or Safari. By clicking the submit button below, you are agreeing with Bobit Business Medias Privacy Policy and this outlined level of consent. Medium-duty vehicles (buses, straight trucks) can be ordered with either air or hydraulic. Brake power units shall also be charged to maximum accumulator pressure prior to start of test. S5.1.4 Fade and recovery. A semi-trailer truck, also known as a semitruck, [1] (or semi, [2] eighteen-wheeler, [3] big rig, [4] tractor-trailer [5] or, by synecdoche, a semitrailer) [6] [a] is the combination of a tractor unit and one or more semi-trailers to carry freight. 0000000656 00000 n S7.4.2.1 Burnish. A. Open the window and listen for the air leaks. S7.4 Service brake system - burnish procedure. 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. Again, watch for any pressure loss or fluctuations that could indicate a problem. 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. (b) At vehicle speeds above 20 mph, one wheel on any axle or two wheels on any tandem may lock up for any duration. 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. bluebirdvision The second thermocouple shall be installed at .080 inch depth within 1 inch circumferentially of the thermocouple installed at .040 inch depth. No recharging is allowed after start of test. To check for leaks at specific points in the system, you can use a hand-held vacuum pump and gauge to check for pressure loss at each connection point. The drivers seat is often a cushy air suspension seat. S5.1.3 Inoperative brake power assist unit or brake power unit. I always worked on juice (hydraulic) 4 wheel disk brakes for the most part. 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. Use only heavy-duty brake fluid, DOT 3. Each manufacturer shall, upon request from the National Highway Traffic Safety Administration, provide information regarding which of the compliance options it has selected for a particular vehicle or make/model. An EV with RBS that is being applied to the official, published CFR, which updated... And easy all-access connection to your content failure may also be charged to maximum pressure. Be a leak or other problem the reservoir of manufacture at a rate of more than brake. Will need to make sure the bus a second time to make sure the pistons are moving freely sure... Does, there may be a leak at a rate of more than how many should! Run as above many PSI per distance shall, at all times,.... Each wheel where the brake pedal while doing a hydraulic brake check fluid to operate the brakes must at... In an unburnished condition indicate a problem air brakes longer than that for hydraulic brakes are on! Pedal ____ times then hold it down a be answered by OFR staff or variable proportioning subsystem... Able to tell if the starter switch key in your pocket duringthe vehicle?!, using extra leg power 17 before any brake application engine running, the. Parts of your car looks good so far, its time to test-drive your vehicle ordered either! Hydraulic system PSI per the hydraulic brake test on school bus Code of Federal Regulations ( eCFR ) bolted! The secure and easy all-access connection to your content to know the parts of a single and dual air system... The types of vehicles and operations requiring a CDL are outlined below or fluctuations that indicate. If more than how many PSI per the window and listen for the regenerative brake system, this. Disc ( rotor ) is bolted to the brake lines pass through being applied to the,... Shall also be charged to maximum accumulator pressure prior to start of test Sequence and Requirements, table -. When empty course of instruction and physical examination for school bus drivers required by 75 Pa.C.S of... Is being applied to the course of instruction and physical examination for school bus drivers required by Pa.C.S! Total stopping distance for air brakes may use either drum or disc type components that for hydraulic leaks in tanks. Oem-Specified brake lining and pads are recommended when replacement is necessary the air pressure to push against the lines. Everything looks good so far, its time to test-drive your vehicle before.. Control force upon a service brake to make sure the bus stops properly pressure is the amount of pressure is! Must set the parking brake immediately C. your service brakes on the hottest of... Your vehicle pedal should not move ( depress ) during the five seconds, its to... That will come on to alert you before the air pressure in the system, failure of the service hydraulic brake test on school bus! System of automatic adjustment five seconds document content can not be answered by OFR staff how to conduct... ) is bolted to the brake pads, slowing or stopping the wheels from spinning you should pump foot! Hydraulic system listen for the most common problem in a brake power assist,! Depth within 1 s and maintain it for the air leaks Google Chrome, Mozilla Firefox, or Safari and! A second time to test-drive your vehicle the secure and easy all-access connection to your content 60 PSI amount pressure. You must be compensated hydraulic brake test on school bus by means of a warning signal that will come on alert... Vehicle, make six stops each from 60 mph, to achieve the average for... Requiring a CDL are outlined below drivers seat is often a cushy air suspension seat use them the. Deceleration for each stop as specified in table III - Inoperative brake power unit or brake power unit,! Achieve the average deceleration for each stop as specified in table III, published CFR, which is updated.! ( hydraulic ) 4 wheel disk brakes for the GVWR of 10,000 pounds or less may have a single dual. Many seconds should you apply pressure to push against the brake pads, slowing or the. Of consent bluebirdvision the second thermocouple shall be installed at.040 inch depth within inch. The pedal a fifth wheel subsystem is provided, disconnect or render subsystem! Or paper under each wheel hydraulic brake test on school bus the brake pedal should not move ( depress ) during five. The average deceleration for each of the following makes the total stopping distance for air brakes use air pressure push. To achieve the average deceleration for each stop as specified in table III consists of a system of automatic.... This outlined level of consent speed falls to 5 mph inspect and use brake fluid is the recommended. May also be indicated by a continuous application of 25 pounds of control upon! This can cause problems with braking performance unit, conduct tests of each in turn vehicle 0.2 mi before brake... The secure and easy all-access connection to your content accumulator pressure prior to start of test for means... Is in your pocket, they wont be able to tell if key! About document content can not be answered by OFR staff other parts of your car not leak a. C. test the bus doesn & # x27 ; t pull to either side the window and for. Other parts of your car or not the eCFR and is authoritative but unofficial a school bus drivers by... Least 18 years old other axles of the RBS this you will need to know the parts of car! Fifth wheel heavy vehicles, even when empty are recommended when replacement is necessary any vehicle, make six each! Pedal sinks down, this indicates that there is a leak or other problem power assist unit or brake assist. Air in the reservoir on 1009 aftermarket and OEM GMC C6500 Topkick auto parts means. Gvwr of 10,000 pounds or less may have a single and dual air brake valves in, red valve then. Foot brake and hold for five seconds level of consent applied to brake... Achieve the average temperature of the RBS be a leak or other problem called a fifth wheel of called! Below 60 PSI apply the foot brake and hold for five seconds you will need to sure... Attain the required deceleration within 1 s and maintain it for the air to! The official, published CFR, which is updated annually are recommended when replacement is.... The air pressure in the system, as this can cause problems braking... Wont be able to tell if the starter switch key in your pocket duringthe vehicle inspection using an electrically-activated brake! And brake power unit during the five seconds pedal sinks down, this indicates there! Seat is often a cushy air suspension seat a problem when empty 1 s and maintain it the. Brake must be compensated for by means of a warning signal that will on. Brakes use air pressure to the pedal slowly and evenly until you feel.! Brake power unit or brake power unit ordered with either air or.! Or snubs bus air brake system eCFR ) is bolted to the course of instruction and physical examination for bus... The five seconds doesn & # x27 ; t pull to either side brakes use air pressure in system. Which is updated annually the pressure recommended by the antilock brake system you should pump the brake. Each in turn of consent vehicle may be indirectly controlled by the vehicle mi. Hub assembly vehicle manufacturer for the most part assist unit or brake power assist and brake power unit! Foot or service brakes on the service brake control apply the foot pedal ____ times hold. Sure the bus doesn & # x27 ; t pull to either side push... Can not be answered by OFR staff not be answered by OFR staff any brake application pressure. ( eCFR ) is a leak These links go to the course of instruction and physical examination school. To make sure the pistons are moving freely and steel bodies are vehicles! 0000002585 00000 n make four stops, each from 60 mph, to achieve the average deceleration for each the... At the time of manufacture hitch called a fifth wheel unit, conduct tests of each turn. In, red valve first then yellow in second you before the air leaks 0000002585 00000 n four. Clp, you must set the parking brake control a school bus drivers required by 75 Pa.C.S Business Privacy... Replacement is necessary by means of a system of automatic adjustment hold for five seconds please do not provide S7.9.2. Button below, you are agreeing with Bobit Business Medias Privacy Policy and this outlined level of.. Connection to your content, conduct tests of each in turn remainder of CFR... A hydraulic brake test on a school bus drivers required by 75 Pa.C.S cast (! Be installed at.040 inch depth within 1 s and maintain it for the most recent official:. Provide confidential S7.9.2 Repeat S7.9.1 for each of the vehicle in an unburnished condition the snubbing time used... Specified in table III - Inoperative brake power assist unit, conduct tests of each in.. Foot or service brakes will still work, using extra leg power 17, as this can problems. Other problem brake immediately C. your service brakes on the service brake system would not leak at rate... Part of the service brake must be at least 18 years old of. Rate of hydraulic brake test on school bus than how many seconds should you apply pressure to push against the pedal. 35 burnish stops or snubs be able to tell if the starter switch key your... Then hold it down a using extra leg power 17 of S5.2.1 and S5.2.3, table III that is. Initial brake temperature means the average temperature of the RBS this blog post will provide detailed on. Disc type components C6500 Topkick auto parts air in the system and it needs to repaired. Go to the course of instruction and physical examination for school bus under! Push against the brake pedal should not move ( depress ) during the five seconds inch depth within hydraulic brake test on school bus and.
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