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|  MIL-T-62222(AT)
4.6.16.2.2 Exterior lights. To determine conformance to 3.4.15.2.2, the external lights shall
be tested for operation as specified during and after the eight mile road test.
4.6.16.2.3 Generator voltage. To determine conformance to 3.4.15.2.3, the generator voltage
shall be checked as specified.
4.6.16.2.4 Driver's infrared power pack high voltage supply. To determine conformance to
3.4.15.2.4, with the master battery control and infrared power switches turned on and generator
supplying specified voltage, the voltage shall be measured at the driver's I.R. periscope loose
harness plug using an 80 megohm load to simulate the I.R. periscope.
4.6.16.2.5 Air cleaner blower motors. To determine conformance to 3.4.15.2.5, the air
cleaner blower outlets shall be checked for proper air flow during engine operation, and no flow
when the engine is not operating.
4.6.16.2.5.1 Air cleaner outlet system. To determine conformance to 3.4.15.2.5.1, the filter
shall be removed, the hose clamp at the turbocharger inlet shall be loosened, and the outlet
system shall be sealed off at both ends and pressurized to a vacuum pressure between 25 and
30 inches of water. Maintain turbocharger inlet cleanliness during test and when re-attaching the
hose clamp.
4.6.16.2.6 Engine manifold heater. To determine conformance to 3.4.15.2.6, the pushbutton
switch on the purge pump handle and the starter switch shall be actuated and pin "a" of the
engine electrical disconnect shall be checked for proper voltage.
4.6.16.3 Turret electrical.
4.6.16.3.1 Main gun firing circuits. To determine conformance to 3.4.15.3.1, the following
tests shall be conducted:
a. With a 1.25 A load connected at the circuit output, the voltage across the load shall be
tested with a voltmeter for presence of vehicle voltage as each firing trigger is
actuated and the voltage is recorded.
b. Tests shall be conducted for proper probe grounding as specified, the dead man
switching feature, and proper interconnection of 1) the emergency switch on the
manual elevation pump handle and 2) emergency mode firing with the blasting
machine.
4.6.16.3.2 Emergency mode firing. To determine conformance to 3.4.15.3.2, the blasting
machine circuits shall be checked for sufficient power to fire the main gun.
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