MIL-T-62735 Trucks And Truck Tractors: Modified Commercial, General Specification ForThis specification covers general requirements for the classes, models and types of modified commercial trucks indicated in the specification title above and in 1.2 below. This specification is intended only as a document to be referenced in detail specification sheets that must, as a minimum, cover detailed truck body requirements and specify the model and class required from table I.

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MIL-T-62735

3.9.4.1  Test report.  When specified (see 6.2), an engine test report shall be available showing that a representative engine of the same model has been tested and certified to meet the requirements of NATO AEP-5 (400 hour dynamometer test using JP-8).  Again, a power loss is acceptable.

3.9.5  Auxiliary 24-volt system with trailer receptacle.  When specified (see 6.2), the vehicle shall have 24-volt trailer receptacle conforming to MS 75021-2, with a captive cover assembly, all in a functional location.  The 24-volt receptacle shall be connected through appropriate lighting controls to terminals B, D, E, J and L of MS 75021-2.  On truck tractors, the pogo-stick type hose tender shall accommodate and secure the 24-volt cable.  Electrical power for the 24-volt system shall be provided on the vehicle by a 12 to 24-volt converter(s) conforming to 3.9.5.2 or a 24-volt alternator conforming to 3.9.5.3.

3.9.5.1  Twelve conductor cable.  The auxiliary 24-volt system shall have a

twelve-conductor 24-volt conductor cable, not less than 2800 mm (110 inches) long (but see

3.4.2.16 and 3.4.2.18), with the ends of the cable equipped with connectors conforming to

MS 75020-1 and MS 75020-2.  The cable shall be stowed in the vehicle.

3.9.5.2  Converter type 24-volt system.  The 12- to 24-volt converter(s) shall operate from the 12-volt vehicle battery.  The total output capacity shall be not less than 24 amperes,

24-volts.  More than one converter may be provided to supply a total of 24 amperes, 24 volts.

3.9.5.3  Alternator type 24-volt system.  The alternator type 24-volt system shall be completely independent of the chassis 12-volt system and shall include:

(a)   Nominal 24-volt alternator with not less than 25 amperes rated output capacity and capable of providing not less than 7 amperes dc output at normal engine idle speed

(b)   Two 12-volt batteries with a combined capacity of at least 40 ampere-hours at a

20-hour rate or one 24-volt battery with at least 20 ampere-hours capacity at a

20-hour rate

(c)   Voltage regulating device

(d)   A 24-volt system ammeter, mounted in the cab, visible to the seated driver.

3.9.6  Highway transportability.  When specified (see 6.2), the vehicle shall not exceed the legal size and weight limits imposed by the North Atlantic Treaty Organization (NATO) countries in the International Road Federation (IRF), Limits of Motor Vehicle Sizes and Weights.

3.9.7  Air transportability.  When specified (see 6.2), except for van trucks, vehicles up to and including class 46, shall be air transportable in C-130, C-141 and C-5A aircraft.  When air transportability in C-130 aircraft is required, the width over the tires shall not exceed 2590 mm

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