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|  MIL-T-2452J
component operation, and without loose excess wire. Provisions for stowage of the cable shall
be provided in the vehicle cab, and shall provide positive cable retention during vehicle
operation. Heaters shall be furnished as follows:
(a)
A coolant heater, 1500-watt minimum rating, shall be installed in the engine block
or lower coolant inlet hose. An engine thermostat with an operating range of 170F
to 195F shall be installed.
An immersion type engine oil heater, 300-watt minimum rating, with 170F to
(b)
195F thermostat, shall be installed in the oil pan through any convenient opening
(c)
The battery heater shall have a capacity adequate to maintain the battery electrolyte
at a temperature of not less than 10F during vehicle exposure to ambient air
temperatures as low as minus 60F and shall embody a thermostat to limit the
temperature of the electrolyte to not more than plus 80F
(d)
A fuel warmer or preheater shall be provided on diesel engine driven vehicles to
prevent clogging of fuel filters due to wa 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 40F to an outlet temperature of plus 9F, with
a flow rate not less than the maximum fuel demand of the engine fuel system. A
coolant shutoff valve shall be provided on the coolant inlet side of the fuel warmer
unit.
3.4.1.9 Silicone rubber hoses. When specified (see 6.2), silicone rubber radiator and
heater hoses shall be furnished.
3.4.2 Electrical systems. The 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 dc lighting system, and with not less than a 60-ampere
alternator, shall be furnished. Engine starting equipment shall include an ether starting system or
a glow plug. If an ether system is furnished in lieu of a glow plug, 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.
10
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