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MIL-T-83808
3.5.3.1.2 FLoo dlight. One round adjustable floodlight, of not less than 3,000 candlepower and not less
than 3 1/2 inches in diameter, shall be furnished on the vehicle. Floodlight shall be located on the vehicle
so that the areas immediately behind it and all three pintles will be illuminated at night. Floodlight on/off
switch shall be labeled and easily operable from operator's position inside the cab.
I n t e r i o r lighting The cab and all compartments shall be provided with lighting adequate to
3.5.3.2
enable personnel to readily obtain equipment and perform all functions necessary during night operation.
Sealed contact switches shall be provided to automatically illuminate the lights in the cab or a compart-
ment when its door is opened.
One domelight with integral individual on/off switch shall be provided. The dome-
3.5.3.2.1 Domelight.
light shall be mounted on the cab roof and centered over the operator's and passenger's seats (in center
of adjustment range). The light shall illuminate the cab adequately to allow reading of a checklist.
3.5.4
Horn. Manufacturer's standard electric horn shall be furnished.
3.5.5 Electrical wiring. The electrical wiring shall be coded every two feet. The wiring shall be enclosed in
a harness to within three inches of the terminal end. The harness shall be secured to the chassis frame
using insulated clamps and secured to other components with nylon electrical tie straps or other means in
accordance with industry standards.
interization system. When specified (see 6.2), the vehicle shall be equipped with a winteri-
3.6
zation system to permit storage and operation in ambient temperatures as low as -65F. Heaters shall
operate on 110 volt/240 volt, step up/step down alternating current (AC) and shall be wired through a
function block to a single three pronged (male) weatherproof slave receptacle for receiving external power
and grounding the vehicle. The slave receptacle shall be mounted on the left side (driver's side) of the
vehicle so the operator can see the external electrical power cord connected to the vehicle. A red warning
light shall be mounted on the dash and shall be connected to the external power circuit in the junction
block so it will illuminate when the block heater is connected to external power. A three wire connecting
cable, 25 feet long and of adequate line capacity to supply power for all heater units simultaneously, shall
be furnished. The connecting cable shall include a matching female connector at the vehicle end and a
standard weatherproof three pronged (two power, plus one ground) male connector at the other end. Elec-
trical apparatus shall conform to FMCSR 393.77(c)(7). Electrical Insulation of connective cable shall
withstand normal operating stresses in low ambient air temperature without cracking or loss of dielectric
capacity. All heater lead wires shall be installed without interfering with vehicle component operation and
without loose excess wire. Provisions for storage of the cable shall be provided in the vehicle cab Heat-
ers shall be furnished as follows.
a. A coolant heater, 1,500 watt minimum rating, shall be installed in the engine block or in the
lower coolant inlet hose, controlled by a thermostat with an operating range of 140F to 160F
b. An immersion type engine oil heater, 300 watt minimum rating, shall be installed in oil pan
through any convenient opening The 011 heater shall be controlled by the coolant heater
thermostat.
c. A battery heater shall be provided having a capacity adequate to maintain battery electro-
lyte at a temperature of not less than 10CF during vehicle exposure in ambient air tempera-
tures as low as -65F and shall embody a thermostat to limit the temperature of the electrolyte
to not more than 80F.
d. A fuel warmer or preheater shall be provided to prevent clogging of fuel filters due to wax
crystallization in the fuel. The fuel warmer shall use engine coolant to transfer sufficient heat
to the diesel fuel to heat it from an inlet temperature of -65F to an outlet temperature of 10F,
with a flow rate not less than the maximum fuel demand of the engine fuel system.
3.7
Aux iliary equipment
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