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|  MIL-T-46765(AT)
(i) Dual sunvisors
(j) Driver's compartment ventilator other than window
(k) Tachometer (diesel engine driven vehicles only)
When specified (see 6.2), an ammeter or voltmeter gage, oil pressure gage, and coolant
temperature gage shall be provided in lieu of the indicators and buzzers specified above. When
specified (see 6.2), an automatic engine shutdown system also shall be furnished. The system
shall include an engine coolant temperature, engine coolant level and engine oil pressure red
indicator warning light and alarm buzzer. The warning light and buzzer actuation shall precede
engine shutdown. The system shall permit engine restart and run for approximately 30 seconds
follow automatic shutdown. Also, engine oil pressure and engine coolant temperature gages
shall be provided with the automatic engine shutdown system.
* 3.4.20 Rearview mirrors. Outside rearview mirrors shall be mounted on both sides of the
cab. The mirrors shall have flat and convex areas. The flat portion shall have not less than
320 square centimeters (cm2) (50 square inches) of reflective area. The convex portion shall
have not less than 155 cm2 (24 square inches) of reflective area and a radius of curvature of not
less than 510 mm (20 inches). The convex portion shall be attached to the lower mirror
supporting arm and shall not interfere with use of the flat mirror. The mirrors shall have not less
than two supporting arms. When specified (see 6.2), the curbside flat mirror shall be of the
motorized type, with remote control. The mirror motor shall provide not less than 60 degrees
horizontal rotational viewing range. When specified (see 6.2), the flat mirrors shall be
electrically heated. Mirror remote and heating controls shall be within reach of the seated driver.
3.4.21 Horn. The manufacturer's standard electric horn shall be furnished. When specified
(see .6.2), in addition, an air operated horn shall be provided.
3.4.22 Engine hour meter. An engine hour meter having a totalizing mechanism of not less
than 9,999 hours shall be furnished for the chassis engine to register accurately the number of
hours of operating time. The meter shall be of rugged construction to insure continuous trouble
free performance under severe operating conditions. Engine hour meter shall be mounted on the
cab instrument panel.
3.4.23 Rotating warning light. An amber, rotating, vehicular warning light conforming to
MS 51317-4 shall be provided. The rotating light shall be mounted with reinforcement at point
of attachment on vehicle centerline for 360 degree visibility. The warning light shall be operated
by means of a separate switch with red indicator light located on instrument panel and marked to
indicate function of switch.
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