Engine starting on grades and slopes test

Page Title: Engine starting on grades and slopes test
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MIL-V-62008B(AT)

4.5.1.33 Engine starting on grades and slopes test. To determine conformance to 3.5.2

and 3.6.5, the engine shall start and oil pressure and temperature shall be maintained when

operating on specified grades and slopes with fuel tanks filled to no more than 50 percent of

capacity. The 60 percent grade test may be conducted in conjunction with brake holding test.

4.5.1.34 Stopping test. To determine conformance to 3.6.6.1, the vehicle shall be

operated on dry, level, hard-surfaced roads without loose material and the results of three

consecutive stopping tests shall be averaged to make this determination.

4.5.1.35 Holding test. To determine conformance to 3.6.6.2, the added load required to

simulate combat loaded vehicle shall be placed on the vehicle in position that will not restrict the

flow of engine air (intake or exhaust). The vehicle shall be driven up a 60 percent dry, hard

grade. Service brakes and parking brakes are checked for conformance. The engine starting and

fuel system tests on a 60 percent slope may be conducted in conjunction with this test.

4.5.1.36 Turning test. To determine conformance to 3.6.7, vehicle shall be operated and

pivoted 360 to right and left in neutral steer range and checked for functional requirements.

During this test, the vehicle shall be brought to a full stop before reversing turning direction.

The full pivots shall be accomplished within 35 feet diameter circle.

4.5.1.37 Fording test. To determine conformance to 3.6.8.1 and 3.6.8.5, the vehicle shall

be driven into water of specified depth with engine compartment drain valves open and without

special equipment. During or after test period water accumulation on crew compartment hull

floor shall not be more than specified depth. The engine shall idle at 1,000 rpm for 15 minutes,

stopped, and restarted in not more than 3 minutes with all accessories functioning satisfactorily

during and after fording. The procedure employed in maintaining test facility cleanliness shall

be furnished to the Government.

4.5.1.38 Drain valves check. To determine conformance to 3.6.8.3, inspection

equipment shall be attached to the end of the handgrip of the front valve lever and actuated as

specified. The rear valve lever shall have the gage attached and actuated as specified. The front

and rear drain valve levers shall operate at forces specified and valve checked for functional

requirements.

4.5.1.39 Inflatable seal and pump check. To determine conformance to 3.6.8.4, the

pump shall be actuated to arrive at specified pressure as indicated on inflatable seal pressure

gage. The indicated pressure loss during a 30 minute period shall not exceed 5 psi. Caution: the

pressure shall be relieved at the conclusion of this test.

4.5.1.40 Turret and gun control system checks. To determine conformance to 3.6.12.1

with the turret level within 1, the following tests shall be performed. Gun elevation and

depression tests may be performed in conjunction with gun fire control tests. Throughout these

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