MIL-DTL-62270B(AT)
3.4.1.9 Trench crossing. The chassis shall cross trenches 36 in. in depth and 102 in. in
width without stalling or damage to suspension and other vehicle equipment (see 4.7.1.9).
3.4.1.10 Vertical obstacles. The chassis shall cross over vertical obstacles 36 in. in height
while moving forward, without stalling or damage to the suspension and hull floor (see 4.7.1.10).
3.4.1.11 Turning. The chassis shall turn 360° to the right and left in pivot and in neutral
steer within a circle of 35 ft in diameter (see 4.7.1.11).
3.4.1.12 Controls and instrumentation. When installed in accordance with applicable
drawings, all electrical, mechanical, and hydraulic controls and instruments shall operate without
malfunction throughout all ranges of operation under all chassis operating conditions
(see 4.7.1.12).
3.4.1.13 Adjustment mechanisms. When installed and adjusted in accordance with
applicable drawings, all adjustment mechanisms shall function properly and maintain adjustment
settings during all chassis operating conditions (see 4.7.1.12).
3.4.1.14 Generator voltage. Generator voltage shall be regulated to not less than
25.8 Vdc and not more than 30.2 Vdc (see 4.7.1.13).
3.4.1.14.1 Generator blower motor. The generator blower motor shall be capable of
delivering a constant flow of air through the generator. The electrical circuit for the blower shall
contain a switch to allow shut-off during fording (see 4.7.1.13).
3.4.1.15 Air cleaner blower motors. Each air cleaner blower motor shall provide a flow
of air through each blower outlet. The air cleaner blower motors shall be wired to preclude
blower operation when the engine is not running (see 4.7.1.14).
3.4.1.16 Lights. All lights shall operate as specified on applicable drawings through all
chassis operating conditions. All electrical contacts and connections shall maintain positive
contact under all chassis operating conditions (see 4.7.1.15).
3.4.1.17 Driver night viewer power circuit. The voltage output at the driver night viewer
connector shall be within 0.2 V of the positive battery potential when operating into a 1 A load
(see 4.7.1.15).
3.4.1.18 Locking, unlocking, and actuated mechanisms.
3.4.1.18.1 Hull drain valves. After unlocking the lever, the force required to operate the
front drain valve lever shall not exceed 17 lb at the hand grip to actuate the valve a minimum of
0.38 in. travel. After unlocking the lever, the force required to operate the rear drain valve lever
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