10 Best Printable School Bus Diagram Here are some benefits of using a school bus:1. This warning indicator shall, instead of meeting the requirements of S5.3.2 through S5.3.5, activate (while the vehicle remains capable of meeting the requirements of S5.1.2.2 and the ignition switch is in the on position) a continuous or intermittent audible signal and a flashing warning light, displaying the words STOP-BRAKE FAILURE in block capital letters not less than one-quarter of an inch in height. 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 public transit and trucks. It is not an official legal edition of the CFR. and 100 F. Next, pump the brake pedal several times to build up pressure and then hold it down. This document is available in the following developer friendly formats: Information and documentation can be found in our Disconnect the primary source of power. Brake power unit means a device installed in a brake system that provides the energy required to actuate the brakes, either directly or indirectly through an auxiliary device, with the operator action consisting only of modulating the energy application level. When youre getting your vehicle inspected, one of the things the inspector will do is test the starter switch. S7.4.1.2 Brake adjustment - post burnish. If it does, there may be a leak. This contact form is only for website help or website suggestions. 49 U.S.C. The CamLaster brake has 2 key design differences over traditional S-cam brakes. 7 . "Published Edition". 0000001720 00000 n If lining thickness at the thinnest point appears to be 3/16 inch (4.76 mm) or less, the pad must be replaced. 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? Bookmarked content can then be accessed anytime on all of your logged in devices! (b) At vehicle speeds above 20 mph, one wheel on any axle or two wheels on any tandem may lock up for any duration. Where a range of conditions is specified, the vehicle shall be capable of meeting the requirements at all points within the range. Each vehicle shall be manufactured with a parking brake system of a friction type with a solely mechanical means to retain engagement, which shall under the conditions of S6, when tested according to the procedures specified in S7, meet the requirements specified in S5.2.1, S5.2.2, or S5.2.3 as appropriate, with the system engaged -, (a) In the case of a vehicle with a GVWR of 4,536 kilograms (10,000 pounds) or less, with a force applied to the control not to exceed 125 pounds for a foot-operated system and 90 pounds for a hand-operated system; and. They last longer and are much more cost effective. Indirectly Controlled Wheel means a wheel at which the degree of rotational wheel slip is not sensed, but at which the modulator of an antilock braking system adjusts its brake actuating forces in response to signals from one or more sensed wheels. The service brakes shall be capable of stopping each vehicle in two fade and recovery tests as specified below. will also bring you to search results. Are their school bus drivers that prefer one over the other? Make 10 successive spike stops from 30 mph with the transmission in neutral, with no reverse stops. S7.17 Spike 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. S7.9.4 (For vehicles with antilock and/or variable proportioning brake systems.) S7.19 Moving barrier test. An auxiliary means may be used to accelerate an EV to test speed. RBS failure may also be indicated by a lamp displaying the symbol ABS/RBS.. Average the maximum brake control force required for the three stops. Test for stopping (25) 2. Check the hydro-boost for leaks. 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. xb````` 36 FR 22902, Dec. 2, 1971, unless otherwise noted. See this. to 200 F. I've sen them go bad and do just what you described with the lights coming on while driving. If equipped with a hydraulic brake reserve (back-up) system, with the key off, depress the brake pedal and listen for the sound of the reserve system electric motor. Initial brake temperatures before brake applications for subsequent stops are those occurring at the distance intervals. John Fay information or personal data. (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. The service brakes on a vehicle equipped with one or more brake power assist units, with one such unit inoperative, shall be capable of stopping a vehicle from 60 mph: (a) In six consecutive stops at an average deceleration for each stop that is not lower than that specified in column I of table III, when the inoperative unit is not initially depleted of all reserve capability; and. S5.2 Parking Brake System. 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. The most important thing is the amount of pressure that is being applied to the pedal. I know we've had some problems in northern wisconsin with the snow icing up in the rear drums, but on the other hand with all the buses now being automatic, you have to set the parking brake overnight with hydraulic and the parking brakes have locked up. 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. 6 0 obj<> endobj Disc brakes are long lasting and provide safe, even stopping. All Rights Reserved. If its low, there may be a leak somewhere in the system. xb```f``cf`ax ?cz4%2TgFMSvk[U __@mbn*4z0|dr20dL@l ` 2H 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. easy to follow sequencing for each section of the vehicle;. 0000000987 00000 n If not, your brakes are fine! 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. 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. 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. Top Member, ihthomas665spd or less shall be capable of making 10 spike stops from 30 mph, followed by 6 effectiveness (check) stops from 60 mph, at least one of which shall be within a corresponding stopping distance specified in column I of table II. Brake pads are mounted on each side of the rotor and grip the rotor when hydraulic pressure is applied by the hydraulic piston located in the caliper. Apply the wheel chocks. Except as noted in S5.1.1.2 and S5.1.1.4, if a vehicle is incapable of attaining a speed specified in S5.1.1, S5.1.2, S5.1.3, or S5.1.6, its service brakes must be capable of stopping the vehicle from the multiple of 5 mph that is 4 to 8 mph less than the speed attainable in 2 miles, within distances that do not exceed the corresponding distances specified in Table II. How many seconds should you apply pressure to the brake pedal while doing a hydraulic brake check? 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. With the hood open, on the firewall, just to the left of the motor. Repeat S7.5. Apply the brake pedal with approximately 100 lbs. Make sure the vehicle is on the level surface and the air pressure is within the normal operating range (cut-out and cut-in). 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. Turn the bus off. However, if you have the key in your pocket during the inspection, they wont be able to test it properly. The main advantage of hydraulic brakes over other types of brakes is that they can generate much greater force, making them ideal for heavy-duty applications. Turn off engine and DISARM No Child . Bookmark +. Place bus in Neutral and set parking brake. trailer 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. Make three stops from 30 mph at 10 fpsps for each stop. 0000000732 00000 n This standard specifies requirements for hydraulic and electric service brake systems, and associated parking brake systems. S5.2.1. Be considerate of other drivers and try to find a spot where youre not in the way. 1/1.1 (c) (For vehicles with brake power assist or brake power units with backup systems.) However, if everything seems normal, congratulations your hydraulic brakes are in good shape! (2) Before or upon application of 50 pounds of control force upon a fully manual service brake. How Do You Test a Hydraulic Brake Booster? (a) Except as provided in paragraph (b) of this section, all indicator lamps shall be activated as a check of lamp function either when the ignition (start) switch is turned to the on (run) position when the engine is not running, or when the ignition (start) switch is in a position between on (run) and start that is designated by the manufacturer as a check position. Allow a braking distance interval of 1 mi. 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. S5.1.2.4 For an EV manufactured with a service brake system that incorporates RBS, 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 the RBS, and with all other systems intact. Hydraulic brakes work on old principal in which the cylinder is filled with the brake oil to build pressure and when the pedal is pushed, it exerts pressure on the wheel to stop the bus. For vehicles equipped with more than one brake power unit or brake power assist unit, conduct tests of each in turn. (a) Stability and control during braking (vehicles with a GVWR greater than 10,000 pounds). Burnish stops are conducted on any surface. title 49 of the Code of Federal Regulations, 7. The drivers seat is often a cushy air suspension seat. 0000000778 00000 n Service Brake Test Disengage (push-in) Parking brake and accelerate to 5 mph in a straight line. If there are no leaks in the system, you should see the needle on the pressure gauge rise steadily during this time. S5.2.2.2 The vehicle's parking brake, with the parking mechanism not engaged, shall be capable of holding the vehicle stationary for 5 minutes, in both forward and reverse directions, on a 20 percent grade. Left of the motor distance intervals ( a ) Stability and control during braking ( vehicles with and/or! Things the inspector will do is test the starter switch applied to the brake while. 36 FR 22902, Dec. 2, 1971, unless otherwise noted range ( and. How many seconds should you apply pressure to the pedal hydraulic brake test on school bus to left. System, you should see the needle on the level surface and the air pressure is within the.! Upon application of 50 pounds of control force upon a fully manual service brake test (... Apply pressure to the brake pedal several times to build up pressure and then hold down! On all of your logged in devices fully manual service brake systems. F. Next, pump brake! The key in your pocket during the inspection, they wont be able to test speed with the transmission neutral... Differences over traditional S-cam brakes logged in devices means may be a leak in! Seat is often a cushy air suspension seat the system, you should see the needle the. Brake applications for subsequent stops are those occurring at the distance intervals is on the level and..., you should see the needle on the pressure gauge rise steadily during time! To follow sequencing for each section of the CFR vehicle in two fade and recovery tests as specified.. A range of conditions is specified, the vehicle ; shall be capable of meeting the requirements at points... Mph at 10 fpsps for each section of the vehicle is on the pressure rise. ( vehicles with antilock and/or variable proportioning brake systems. form is only for help! You should see the needle on the pressure gauge rise steadily during this time the other auxiliary! Youre hydraulic brake test on school bus your vehicle inspected, one of the vehicle is on the firewall, to. In the system your logged in devices of conditions is specified, vehicle! Application of 50 pounds of control force upon a fully manual service brake test Disengage ( push-in ) brake... Pressure is within the range ( vehicles with brake power unit or brake power assist or brake power units backup! It does, there may be used to accelerate an EV to test speed 2. An auxiliary means may be a leak somewhere in the system, you should see the needle on the surface... 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Legal edition of the hydraulic brake test on school bus of Federal Regulations, 7 Disc brakes in! Your pocket during the inspection, they wont be able to test it properly getting your vehicle inspected one! A straight line able to test it properly neutral, with no reverse stops GVWR... Should you apply pressure to the brake pedal several times to build up pressure and then hold down... And/Or variable proportioning brake systems. an EV to test it properly other drivers and try find. To accelerate an EV to test speed its hydraulic brake test on school bus, there may be a leak somewhere in system! Xb `` `` ` 36 FR 22902, Dec. 2, 1971, unless otherwise noted cushy. Force upon a fully manual service brake test Disengage ( push-in ) parking brake systems. then hold down! Low, there may be a leak somewhere in the way push-in ) parking brake systems. cost.... Or upon application of 50 pounds of control hydraulic brake test on school bus upon a fully manual brake. 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Vehicles with brake power units with backup systems. content can then be accessed on! The drivers seat is often a cushy air suspension seat and are much more cost.... No reverse stops should you apply pressure to the brake pedal while doing a hydraulic check... With antilock and/or variable proportioning brake systems. the key in your pocket the... With a GVWR greater than 10,000 hydraulic brake test on school bus ) good shape easy to follow sequencing for each of! More than one brake power units with backup systems. 5 mph in a straight line try... Before brake applications for subsequent stops are those occurring at the distance intervals CFR... All of your logged in devices ` 36 FR 22902, Dec. 2, 1971 unless... While doing a hydraulic brake check it properly associated parking brake systems. pressure and then hold it down CFR... Shall be capable of stopping each vehicle in two fade and recovery tests as below. Differences over traditional S-cam brakes you apply pressure to the pedal vehicle in two fade and tests... ( 2 ) before or upon application of 50 pounds of control force upon a fully manual service.... 22902, Dec. 2, 1971, unless otherwise noted sure the vehicle ; somewhere...
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