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|  MIL-T-83808
(84)
o. Winterization system controls.
p. Block heater red warning light.
3.4.6 C l i m a t e c o n t r o l s y s t e m . The climate control system shall provide heater, defroster, and venti-
lator modes. The system shall include a heater core, a blower, and the plumbing, ductwork, dampers,
controls, and other components necessary to meet the performance requirements specified herein. At
least four adjustable panel louvers shall be provided, approximately evenly spaced across the width of the
cab each shall provide approximately equal flow of air. Cab mounted components shall be protected from
inadvertent damage by personnel.
er and defroste r. Hot water type heater shall be provided. Heater shall be of the recircu-
3.4.6.1
lating type. Discharge outlets shall be provided to direct heated air to floor and to defroster louvers.
Heater shall be complete with blower Heater blower switch should be multispeed (minimum of two
speeds) Mounted controls shall be convenient to driver. The heater shall maintain a temperature of at
least 40F in the cab with an outside ambient temperature of -65F. The defroster shall clear the cab
windows and windshield within 15 minutes after starting the vehicle with an outside ambient temperature
of -65F. An electric fan may be used to aid in keeping the windows clear.
Electrical system.
The vehicle shall be equipped with a 12 volt electrical system. Wiring shall
35
be weatherproof and color coded or numbered for easy identification. All circuits shall be protected by
circuit breakers located so as to be protected from the environmental conditions described herein and to
be readily accessible to a mechanic. The system shall have a negative ground The system shall provide
for an external slaving system. The slaving system shall provide for charging of the vehicle batteries and
for starting of the vehicle. Slaving system voltage shall be identified on the receptacle. Slaving system
shall be installed on the exterior of the vehicle near the batteries.
Alternator. The engine shall be equipped with an alternator sufficient for operating all vehicle
3.5.1
electrical components simultaneously. Minimum capacity of the alternator shall be 12 volts, 60 amperes,
providing not less than 30 amperes DC output at normal engine idle The alternator shall have the capabil-
ity to charge the battery with all electrical accessories operating at engine idle RPM
Battery. The battery shall be of 12 volt potential and shall have 1.25 times the cranking am-
3.5.2
peres required to start the engine when both battery and engine are at -20 F The battery shall conform to
SAE J537 and shall be of the maintenance free sealed type having the maintenance free characteristics
listed in W-B-131. Dual batteries may be used to meet specification.
3.5.3.1
le lighting The vehicle shall be equipped with headlights, taillights, parking lights,
clearance lights, brake lights, turn signal lights, back-up lights and reflectors in accordance with Federal
Motor Carrier Safety Regulations Rear lights shall be installed flush with, or forward of, the rear of body
with wire type guards over the lens to protect them from damage with chocks, tools tool boxes. towbars
etc. The taillights themselves shall be of the removable lens and bulb replacement type Two backup
lights snail be furnished which are activated by placing transmission shift lever in the reverse position A
separate hand operated on/off backup light switch is not permitted.
3 . 5 3 . 1 . 1 Addition al lighting in addition to the standard tail/stop/turn signal system, the vehicle shall be
equipped with two double faced signal lamps in accordance with SAE J588 Signal lamps shall be
mounted on roof of cab approximately 48 inches apart and located on cab transverse centerline Signal
lamps shall be Integrated with the standard turn signal system for easy operation from operator's position
The emergency flashers shall activate the roof mounted signal lamps Turn signal operat ing un it shall be
self-canceling type with visible and audible flash indicator
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