side loading, sit-down rider, diesel-engine-driven, counter-balanced forklift truck. The truck will have a telescopic mast, front wheel drive, power steering, hydraulic brakes, solid pneumatic tires, and an overhead guard.

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MIL-PRF-83818B

3.21.1 Type A winterization. When specified (see 6.2), the truck shall be furnished with Type A

winterization that shall protect to -65� F and shall consist of the following:

3.21.1.1 Power plant heaters. Engine coolant, engine oil and battery heaters shall be provided.

All heaters shall operate on either (110 volts @ 60 Hz) or (220 volts @ 50 Hz) alternating

current. A three wire, 25 feet long weatherproof cable of adequate capacity for all heaters being

used simultaneously shall be provided. The cable shall be able to connect to NATO and

American connectors. A stowage place shall be provided on the truck to keep the cable when not

in use. The heaters shall be as follows:

a. The coolant heater shall be installed in the engine block or lower coolant inlet hose. A

coolant circulating pump, driven by a 110 volt or 220 volt alternating current motor

shall be provided when a coolant inlet hose heater is furnished. The heater shall have

adequate capacity to maintain engine coolant at a temperature of 10� F in an ambient

temperature of -65� F. It shall be controlled to limit engine coolant to not more than

150� F.

b. An engine oil heater with adequate capacity to maintain engine oil at a temperature of

at least +10� F in an ambient temperature of -65� F shall be furnished. It shall be

controlled to limit engine oil temperature to not more than 150� F.

c. A battery heater shall be provided. It shall have adequate capacity to maintain battery

electrolyte at a temperature of at least +10� F in an ambient temperature of -65� F, and

shall have a thermostat to limit temperature of the electrolyte to not more than +80� F.

3.21.1.2 Cab. A cab that is either removable from, or integral with, the overhead guard shall be

provided. Thermal insulation shall be installed on the floor, cab sidewalls and cab ceiling, with

washable covering over all insulation. Boots are required for insulation to close all openings

where attachments and controls enter the cab. There shall be windshield wipers on the front

windshield, and rear and roof windows. The cab shall be equipped with two fully opening doors

or one fully opening door and one emergency exit. Each door shall have a safety latch and a

hold open catch. The cab shall be equipped with an adjustable ventilation fan, not less than 6

inches in diameter.

3.21.1.3 Heater and defroster. The heater shall be of sufficient capacity to maintain a

temperature of +40� F at cab floor level in an ambient temperature of -40� F.

3.21.1.4 Cold starting aid. A starting aid such as a measured shot ether injection system shall be

furnished to allow -65� F starting.

3.21.1.5 Anti-freeze engine. To protect the engine from freezing, the coolant system shall be

protected to -65� F with antifreeze.

3.21.2 Type C winterization. When specified (see 6.2), the truck shall be furnished with Type C

winterization that shall protect to -25� F and shall consist of the following: