8. On Types C, and D vehicles, fuel tanks shall have interior baffles to help prevent buses from fuel starvation on inclines. Governor 1. An engine governor is permissible. When it is desired to limit road speed, a road speed governor should be installed. 2. An electronic engine speed limiter shall be provided and set to limit engine speed not to exceed the maximum revolutions per minute as recommended by the engine manufacturer. For Type C and D buses, and where feasible on Type A buses, bus road speed shall not exceed a maximum of 70 miles per hour. Heating System, Provision for 1. The chassis engine shall have plugged openings for the purpose of supplying hot water for the bus heating system. The opening shall be suitable for attaching a pipe thread/hose connector. The engine shall be capable of supplying water having a temperature of at least 170 degrees Fahrenheit at a flow rate of 50 pounds/per minute at the return end of 30 feet of one inch inside diameter automotive hot water heater hose (SBMI Standard No. 001--Standard Code for Testing and Rating Automotive Bus Hot Water Heating and Ventilating Equipment). Horn Buses shall be equipped with a horn or horns of standard make with each horn capable of producing a complex sound in bands of audio frequencies between 250 and 2,000 cycles per second and tested per the Society of Automotive Engineers Standard J--377. There shall be no air horns. Instruments and Instrument Panel 1. Chassis shall be equipped with the following instruments and gauges (lights in lieu of gauges are not acceptable except as noted): A. Speedometer B. Odometer shall show accrued mileage to six digits not including tenths. C. Tachometer D. Voltmeter (1) An ammeter with graduated charge and discharge with the ammeter and its wiring compatible with generating capacities is permitted in lieu of a voltmeter E. Oil-pressure gauge F. Water temperature gauge G. Fuel
8. On Types C, and D vehicles, fuel tanks shall have interior baffles to help prevent buses from fuel starvation on inclines. Governor 1. An engine governor is permissible. When it is desired to limit road speed, a road speed governor should be installed. 2. An electronic engine speed limiter shall be provided and set to limit engine speed not to exceed the maximum revolutions per minute as recommended by the engine manufacturer. For Type C and D buses, and where feasible on Type A buses, bus road speed shall not exceed a maximum of 70 miles per hour. Heating System, Provision for 1. The chassis engine shall have plugged openings for the purpose of supplying hot water for the bus heating system. The opening shall be suitable for attaching a pipe thread/hose connector. The engine shall be capable of supplying water having a temperature of at least 170 degrees Fahrenheit at a flow rate of 50 pounds/per minute at the return end of 30 feet of one inch inside diameter automotive hot water heater hose (SBMI Standard No. 001--Standard Code for Testing and Rating Automotive Bus Hot Water Heating and Ventilating Equipment). Horn Buses shall be equipped with a horn or horns of standard make with each horn capable of producing a complex sound in bands of audio frequencies between 250 and 2,000 cycles per second and tested per the Society of Automotive Engineers Standard J--377. There shall be no air horns. Instruments and Instrument Panel 1. Chassis shall be equipped with the following instruments and gauges (lights in lieu of gauges are not acceptable except as noted): A. Speedometer B. Odometer shall show accrued mileage to six digits not including tenths. C. Tachometer D. Voltmeter (1) An ammeter with graduated charge and discharge with the ammeter and its wiring compatible with generating capacities is permitted in lieu of a voltmeter E. Oil-pressure gauge F. Water temperature gauge G. Fuel