MIL-PRF-83830C
3.17.5 Wiring schematic. The wiring schematic shall be provided on a durable material and
should be stored in the cab. For example: A book with hard plastic pages (tear resistant & smear
resistant).
3.18 Instruments. In addition to the instruments supplied on the standard commercial
forklift, an hour meter shall be installed in the instrument panel. All instruments, except the hour
meter shall be lighted when the front floodlights (see 3.19) are illuminated.
3.19 Lighting. The truck shall be provided with not less than two flood lamps for forward
illumination and not less than two flood lamps for rearward illumination. The manufacturer shall
make available an additional floodlight that is adjustable from the operator's compartment.
Front flood lamps shall be adjustable. Tail light(s), and brake stop light(s) shall be installed. All
lights shall be protected by location or guards. Individual operator controlled switches shall be
provided for the front lights, the rear lights, and the adjustable light.
3.20 Winterization. (Minimum Requirements).
3.20.1 Type A winterization. When specified (see 6.2), the truck shall be furnished with
Type A winterization that shall protect to -65° F and shall consist of the following:
3.20.1.1 Power plant heaters. Engine coolant, engine oil and battery heaters shall be
provided. All heaters shall operate on either (110 volts @ 60 Hz) or (220 volts @ 50 Hz)
alternating current. A three wire, 25 feet long weatherproof cable of adequate capacity for all
heaters being used simultaneously shall be provided. The cable shall be able to connect to
NATO and American connectors. A stowage place shall be provided on the truck to keep the
cable when not in use. The heaters shall be as follows:
a. The coolant heater shall be installed in the engine block or lower coolant inlet hose. A
coolant circulating pump, driven by a 110 volt or 220 volt alternating current motor shall
be provided when a coolant inlet hose heater is furnished. The heater shall have adequate
capacity to maintain engine coolant at a temperature of 10° F in an ambient temperature of
-65° F. It shall be controlled to limit engine coolant to not more than 150° F.
b. An engine oil heater with adequate capacity to maintain engine oil at a temperature of at
least +10° F in an ambient temperature of -65° F shall be furnished. It shall be controlled
to limit engine oil temperature to not more than 150° F.
c. A battery heater shall be provided. It shall have adequate capacity to maintain battery
electrolyte at a temperature of at least +10° F in an ambient temperature of -65° F, and
shall have a thermostat to limit temperature of the electrolyte to not more than +80° F.
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