MIL-T-45380E(AT)
vehicle. During normal operating conditions, the continuous-duty horsepower output required by all components and accessories driven by the engine shall not exceed 75 percent of the full throttle rating of the engine. The size and weight of the engine assembly shall be held to a minimum consistent with the performance requirements specified herein.
* 3.5.1.1 Engine components. The engine shall be a four cylinder diesel engine. The engine shall be equipped with at least the following components:
(a) Self-starter, 12-volt
(b) Air cleaner
(c) Low oil pressure high water temperature, shutdown system
(d) Fuel water separator system.
(e) An engine hour meter, having a totalizing mechanism of not less than 9,999 hours
(f) When power plant heaters are specified (see 3.4.1.6) a 300-watt immersion type heater with 170°F to 195°F thermostat shall be installed in the oil pan through any convenient opening.
* 3.5.1.2 Engine control panel. An engine accelerator, a key-operated starting (ignition) switch, and a palm button starter shall be installed in a weather- and waterproof cabinet on a control panel, and each shall be identified as to its function. The cabinet shall be provided with a hinged cover with a latch and provisions for locking with a 1-inch padlock.
* 3.5.1.3 Fuel pump. A fuel pump shall be furnished on the engine, if required. When lifting fuel against a head of 4 feet, the pump shall have sufficient capacity to supply the engine at its maximum rated load. An in-line fuel filter shall be provided.
3.5.2 Hydrostatic drive system. A hydrostatic drive system shall be furnished to provide infinitely variable speeds without the use of an intermediate gearbox or shifting of gears throughout the speed range. The system shall develop a torque from 0 to 10,000 pounds. The system shall have pressure override protection built into the pump for kelly bar and ring and pinion gear sets. The system shall provide auger revolution range 0 to 180 revolution per minute (rpm). The system shall use one common reservoir and hydraulic fluid.
3.5.3 Boring assemble.
* 3.5.3.1 Performance. The auger shall bore holes up to 36 inches in diameter and 10 feet in depth in permafrost soil. The auger shall bore holes with a minimum variance of 53 degrees from extreme rightmost to extreme left most positions with either a minimum of 30 degrees to the right from center and 23 degrees to the left, or with a minimum of 23 degrees to the left from center and 30 degrees to the right. The auger shall bore holes up to a minimum of 20 degrees
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