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|  MIL-T-62110G
3.4.3 Fuel system. The fuel system shall conform to Federal Motor Carrier Safety
Regulations 393.65 and 393.67.
3.4.3.1 Air cleaner. An air cleaner shall be furnished.
3.4.3.2 Fuel tank(s). Fuel tank(s) shall have not less than 100 gallons total capacity
(85 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 a means shall be provided
to monitor the fuel level of either tank from a single fuel gage.
*
3.4.3.3 Fuel and water separator. The manufacturer's standard or optional fuel filter shall
be provided. When specified (see 6.2), a fuel and water separator shall be furnished. The
separator shall include a water coalescer and a drain valve. When a separator is required, a
combination filter/separator unit may be furnished.
3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier
Safety Regulation 393.83. A vertical exhaust system shall not be furnished. The exhaust outlet
shall be located to direct the exhaust gases away from the control console, in all positions of
rotation. A spark arrester shall be furnished on all vehicles except on turbocharged engines. The
spark arrester shall have an 80 percent arresting efficiency when rated in accordance with
SAE J350.
3.4.4.1 Exhaust system safety shield. The exhaust system or hydraulic system shall be
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 Gear train.
3.4.5.1 Manual transmission. Unless otherwise specified (see 3.4.5.5) 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 provide for
maximum ease of shifting in all speeds. The transmission shall be provided with two power
takeoff openings conforming to SAE J704. One power takeoff opening shall be of the heavy
duty type.
3.4.5.2 Speeds. The vehicle with manual transmission shall be provided with not less
than the number of forward speeds specified in table V. A two speed axle, a multispeed
transmission or an auxiliary transmission shall be furnished. The 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 required vehicle performance specified in
3.3.1 through 3.3.1.3.
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