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|  MIL-T-62032H
(3)
Thermal balance design or thermostat control providing for uninterrupted
operation
(4) Provision for mounting below minimum service oil level.
(c)
Battery heater shall have a capacity to maintain the battery electrolyte at a
temperature of not less than 10 F during vehicle exposure to ambient air
temperatures as low as minus 60 F, and shall embody a thermostat to limit the
temperature of the electrolyte to not more than 80 F
(d)
A fuel warmer or preheater shall be provided on diesel engine driven vehicles 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 minus 40 F to an outlet temperature of plus 9 F,
with a flow rate not less than the maximum fuel demand of the engine fuel system.
A coolant shutoff valve shall be provided for the coolant inlet side of the fuel
warmer unit.
3.4.2 Electrical systems. Electrical systems shall be in accordance with Federal Motor
Carrier Safety Regulations 393.27 through 393.31 and 393.33.
*
3.4.2.1 Starting system (diesel). For diesel engine driven vehicles, a 12- or 24-volt direct
current (dc) starting system with 12-volt lighting system. Engine starting equipment shall
include an ether starting system, glow plug or grid heater. If an ether system is furnished in lieu
of a glow plug or grid heater, it shall be of the measured shot type. The measured shot type ether
system shall be key operated or manually operated from the driver's compartment and shall be
inoperative with the engine warm. Complete provisions for a replaceable ether reservoir of not
less than 12 fluid ounces shall be furnished. A reservoir need not be furnished.
*
3.4.2.2 Ignition system (gasoline). For gasoline engine driven vehicles, a 12-volt dc
ignition system shall be furnished.
*
3.4.2.3 Alternator. Unless otherwise specified (see 6.2) on diesel engine driven vehicles,
a minimum 65-ampere alternator shall be furnished. The alternator output with the engine at
engine idle speed shall be not less than 45 amperes. Unless otherwise specified (see 6.2) on
gasoline engine driven vehicles, an alternator of not less than 85 amperes rated capacity, and
which provides not less than 45 amperes dc output at normal engine idle speed, shall be
furnished.
*
3.4.2.4 Lighting. All vehicle lights and reflectors shall conform to Federal Motor Carrier
Safety Regulations 393.12, 393.19, 393.20 and 393.22 through 393.26(d). Lights and reflectors
shall not be mounted on vertical surfaces of rub rails or on vehicle bumpers (unless recessed and
fully protected).
15
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