18.104.22.168 Air cleaner. An air cleaner shall be furnished.
22.214.171.124 Fuel tanks. The fuel tank(s) for class A and B vehicles, shall be not less than
50 gallons total capacity (43 gallons for vehicles destined for California); and for class C, D and
E vehicles, shall be not less than 90 gallons total capacity. When more than one tank is furnished
on diesel engine driven vehicles, means shall be provided to assure equalized fuel level in both
tanks. When more than one tank is furnished on gasoline engine driven vehicles, a selector valve
connecting either tank to the engine fuel-intake shall be provided and means shall be provided to
monitor the fuel level of either tank from a single fuel gage.
3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier Safety
Regulation 393.83. If vertical exhaust mufflers are furnished, a full exhaust heat shield shall be
furnished to protect personnel loading cargo from the front of the body. Vertical exhaust
systems shall be provided with a hinged rain cap. A spark arrester shall be furnished, except for
vehicles with turbocharged engines. The spark arrester shall have an 80 percent arresting
efficiency when rated in accordance with SAE J350.
* 126.96.36.199 Exhaust system safety shield. The exhaust system or hydraulic system shall be fully
shielded so that, in the event of a hydraulic line rupture or hydraulic fluid leak, the hydraulic
fluid will not come into contact with any part of the vehicle exhaust system.
* 3.4.5 Transmission. Unless otherwise specified (see 188.8.131.52), a manually shifted
transmission shall be provided. The input torque capacity of the transmission shall be at least
equal to the maximum torque delivered by the engine. The transmission shall be provided with
two power takeoff openings conforming to SAE J704. The transmission shall provide for
maximum ease of shifting in all speeds.
* 184.108.40.206 Speeds. Vehicles with manual transmission shall be provided with the number of
vehicle forward speeds specified in table VII. When more than five forward speeds are required,
a multispeed axle or an auxiliary transmission shall be furnished. Gear ratios in the transmission
and other gear selection equipment shall be matched to provide a progressive shifting pattern
throughout the complete range, and shall provide the vehicle performance specified in 3.3.1
TABLB VII. Minimum number of vehicle forward speeds.
No. of forward speeds