184.108.40.206 Turn signals. Turn signal lamps shall conform to SAE J588. Operating units
shall conform to SAE J589 class A and shall be mounted on the steering column. Turn signal
units shall be installed in accordance with J588. Turn signal operating units shall be of the
self-cancelling type with visible and audible type flash indicator.
220.127.116.11 Batteries. Each battery shall be of 12-volt potential. The total reserve capacity
rating and the total cold cranking rating at 0 °F, both measured in accordance with SAE J537,
shall be not less than specified in table VI. The batteries shall be of the maintenance-free type
having the maintenance-free characteristics listed in W-B-131.
TABLE VI. Batteries.
Diesel (less than 220
Diesel (220 gross
horsepower and over)
18.104.22.168 Radio interference suppression. The vehicle shall be suppressed to limit
electromagnetic radiation in accordance with SAE J551. Any body equipment emitting
electromagnetic radiation shall be suppressed to the same level as the vehicle chassis.
3.4.3 Fuel system. The fuel system shall conform to Federal Motor Carrier Safety
Regulations 393.65 and 393.67.
22.214.171.124 Air cleaner. An air cleaner shall be furnished.
126.96.36.199 Chassis fuel tank(s). The chassis fuel tank(s) shall have not less than 50 gallons
total capacity (43 gallons for vehicles destined for California). When more than one tank is
furnished on diesel engine driven vehicles, means shall be provided to assure an 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; or an equalizing
pump shall be used to maintain the same fuel level in both tanks.
3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier
Safety Regulation 393.83 and paragraph 4-3.4 of NFPA No. 407. The exhaust outlet shall be
located immediately behind the cab (between the cab and the tank body) or on the side
immediately in front of or to the rear of the rear wheels. The exhaust outlet, if to the side, shall