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|  MIL-T-62316B(AT)
3.4 Chassis components.
* 3.4.1 Engine. The engine furnished shall be the chassis manufacturer's standard or optional
engine for the commercial model truck which meets or exceeds the requirements of this
specification.
* 3.4.1.1 Diesel engine. Unless otherwise specified (see 3.4.1.2), the vehicle shall be
equipped with a liquid cooled, compression ignition, two-stroke or four-stroke cycle diesel
engine. Engine net power used in performance prediction calculations shall be determined in
accordance with SAE J1349. The engine shall demonstrate the performance characteristics
specified herein when using diesel fuel conforming to VV-F-800. In addition, when specified
(see 6.2), the engine shall operate satisfactorily on grade JP-4 and grade JP-5 fuel conforming to
MIL-T-5624 under emergency, short duration conditions and on grade JP-8 fuel conforming to
MIL-T-83133 under normal conditions. A power loss when operating on JP-4, JP-5 or JP-8 is
acceptable.
* 3.4.1.2 Gasoline engine. When specified (see 6.2), the vehicle shall be equipped with a
liquid cooled, internal combustion, four-stroke cycle gasoline engine. The engine furnished shall
produce the required vehicle performance when operated on unleaded fuel with a research octane
rating of 91, at an engine speed not more than the manufacturer's recommended operating speed.
The engine shall be capable of warranted operation on unleaded fuel, when used in accordance
with the operator's manual. Engine net power used in performance prediction calculations shall
be determined in accordance with SAE J1349. Unless otherwise required by foreign laws,
vehicles for overseas use shall be capable of accepting and operating on leaded gasoline.
3.4.1.3 Oil filter. A full flow or combination full flow and bypass oil filter with
replacement element shall be furnished.
* 3.4.1.4 Cooling system. The cooling system shall maintain the engine coolant at a
temperature below the boiling point with the vehicle loaded to rated GVW and operated at an
altitude of 3050 meters (m) (10,000 feet) above sea level or in ambient air temperature of not less
than 52 Celsius (C) (125 degrees Fahrenheit (F)). The coolant system shall include a surge
tank or a coolant recovery reservoir of not leas than 1.89 liters (L) (two-quart) capacity.
3.4.2 Electrical system. Electrical systems shall be in accordance with Federal Motor
Carrier Safety Regulations 393.27 through 393.31 and 393.33.
* 3.4.2.1 Starting system. For diesel engine driven vehicles, a 12- or 24-volt direct current
(dc) starting system, with a 12-volt dc lighting system shall be furnished. Engine starting
equipment shall include an ether starting system, glow plug or electric grid heater. If an ether
system is furnished in lieu of a glow plug or grid heater, it shall be of the measured shot type.
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