B. Air Dryer: The air brake system shall be equipped with an automatic air dryer. The air dryer shall incorporate the use of a replaceable filter. The air dryer mounting shall be in a manner as to have easy access for removal of the filter without removal or loosening of the air dryer assembly mounting bolts.
School buses shall be equipped with a front bumper. The chassis manufacturer for all school bus types shall furnish the front bumper unless there is a specific agreement between the chassis manufacturer and body manufacturer.
The front bumper shall be of pressed steel channel or equivalent material at least 3/16" thick and not less than 9-1/2” wide (high). It shall extend beyond the forward-most part of the body, grill, hood and fenders and shall extend to the outer edges of the fenders at the bumper's top line. Type A buses weighing 14,050 pounds or less may be equipped with an OEM supplied bumper.
The front bumper, except breakaway bumper ends, shall be of sufficient strength to permit pushing a vehicle of equal gross vehicle weight without permanent distortion to the bumper, chassis, or body.
The bumper shall be designed or reinforced so that it or the chassis frame rail(s) will not deform when a chain or air bumper type jack is used to raise the bus from a proper lifting location on the bumper.
The bumper shall be black. Bumpers for “Type A” school buses shall be the manufacturer’s standard color.
A means shall be provided to mount the license plate for an unobstructed view.
The cooling system radiator shall be engine manufacturer’s recommended type and shall cool the engine at all speeds in all gears. The cooling system fan shall be reinforced type with a fan clutch.
DAYTIME RUNNING LAMPS
A Daytime Running Lamp (DRL) system meeting chassis or body manufacturer's specifications shall be provided on all school buses.
DRIVE SHAFT GUARDS AND SHIELDS
Each drive shaft section shall be equipped with protective metal guard or guards to prevent the shaft from whipping through the floor or dropping to the ground when broken.
Engines shall meet or exceed the minimum engine listed in the tables found on pages B-8 and B-9.