Trans 330.10(4)(4) Bumpers. The front bumper shall have at least an 8-inch face and shall extend at least between the frame rails. The bumper shall be of sufficient strength and shall be positioned to permit pushing a vehicle of similar weight without permanent distortion to the bumper, chassis or body. The rear bumper shall be of sufficient strength and shall be positioned as specified in 49 CFR 393.86 to permit the motor bus to be pushed without permanent distortion to either the bumper or body. Bumpers may not be missing, loosely attached or protruding beyond the confines of the vehicle so as to create a hazard. Trans 330.10(6)(6) Drive shaft and universal joints. The drive shaft shall be protected as provided in 49 CFR 393.89. The universal joints and center bearing may not be loose or worn. Trans 330.10(7)(7) Emergency equipment. Emergency equipment, including fire extinguishers, shall conform to the requirements under 49 CFR 393.95, except that the warning devices for a stopped motor bus may not include liquid-burning emergency flares. Trans 330.10(9)(9) Exhaust system. In addition to the requirements under 49 CFR 393.83, the exhaust system, including exhaust manifolds, joining gaskets, pipes from the muffler, tail pipe and pipes from the exhaust manifold, may not enter the passenger compartment at any location. The complete exhaust system shall be tightly connected and free of leaks. Trans 330.10(10)(10) Fenders. Each motor bus shall be equipped with fenders or shall have a body construction that provides protection from debris thrown by the vehicle’s tires. All tire tread shall be within the fenders or protective body construction. Trans 330.10(12)(12) Frame. The frame shall conform to the requirements under 49 CFR 393.201. Frames may be modified only as specified by a manufacturer to ensure conformity with applicable federal motor vehicle safety standards. Trans 330.10(13)(13) Fuel system. In addition to the requirements under 49 CFR 393.65, 393.67 and 393.69, the fuel tanks and fuel system shall be maintained free of leaks. The fuel tank shall be attached to the motor bus in a manner that prevents movement of the tank while the vehicle is in motion. Trans 330.10(14)(a)(a) In addition to the requirements under 49 CFR 393.77, a heater shall be capable of maintaining an inside temperature throughout the motor bus of not less than 50° fahrenheit at average minimum January temperatures as established by the U.S. department of commerce weather bureau for the area in which the motor bus is operated. Trans 330.10(14)(b)(b) The heater hose shall be adequately supported to guard against excessive wear or abrasion and shall not interfere with or restrict the operation of any engine function. Heater lines inside the passenger compartment shall be shielded to prevent accidental contact by the driver or passengers. Trans 330.10(15)(15) Horn. A motor bus shall be equipped with a horn in good working order and capable of emitting a sound audible under normal traffic conditions from a distance of not less than 200 feet. Trans 330.10(16)(16) Instruments and gauges. Every motor bus originally equipped with any of the following instruments, warning devices or gauges shall be maintained with that equipment or a comparable replacement in good working condition: Trans 330.10(16)(a)(a) Air pressure or vacuum gauge, where air or vacuum brakes are used, with a low energy supply warning system. Trans 330.10(17)(17) Lights, lamps and reflectors. Lighting devices and reflectors shall conform to the requirement for color, position and type under 49 CFR 393.9 to 393.26. Trans 330.10(18)(a)(a) There shall be 2 outside rearview mirrors, one to the right and one to the left of the driver. Each mirror shall be firmly supported and adjustable to give the driver a clear view past both the right and left rear of the bus as provided under 49 CFR 393.80 and 571.111. Trans 330.10(18)(b)(b) In addition to the mirrors under par. (a), there may be an adjustable convex mirror mounted on the left and right front sides of the motor bus to provide an additional close-in field of vision of the front of the bus and rearward. The convex mirror may be mounted separately or attached to the mirrors under par. (a) in a manner that does not reduce the driver’s view. Mirrors may not be broken, cracked or discolored. Trans 330.10(19)(19) Openings. All openings in the floorboard or firewall between chassis and passenger compartment, such as for the gear shift lever and auxiliary brake lever, shall be sealed to prevent fumes or foreign material from entering the passenger compartment. The motor bus shall be free of rusted or deteriorated areas that could permit foreign substances to enter the interior of the vehicle.