MIL-T-62320 Trucks, Van: Shop, Diesel And Gasoline Engine Driven, 19,000 Pounds Gvw, 4X2 And 4X4, CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive, and four-wheel, four-wheel drive, shop van trucks having a minimum gross vehicle weight GVW of 19,000 pounds for normal operating conditions. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62320C

provided with power takeoff opening(s) conforming to SAE J704. The transmission shall provide for maximum ease of shifting in all speeds. Transmission and axle gear ratios shall be selected

to provide the performance specified in 3.3.1 through 3.3.1.3.

3.4.5.1 Speeds. The vehicle shall be provided with not less than four forward speeds for

4x2 model vehicles and not less than 8 forward speeds for 4x4 model vehicles.

* 3.4.5.1.2 Transfer case. A transfer case shall be furnished in model 4x4. Unless the transfer case for is equipped with devices which compensate for differential torque and speeds between front and rear axles, the transfer case shall provide for driver selection of either two-wheel or

four-wheel drive. When furnished, interaxle compensating devices shall provide for positive

transfer of power to all driving axles. When a two-speed transfer case is furnished, the speedometer shall read accurate speed (mph) with the speed selector in high or low range.

3.4.5.2 Clutch. The clutch shall be the largest capacity clutch offered for the type of vehicle and engine furnished, with the clutch torque capacity exceeding the maximum delivered engine torque. The clutch lining shall be asbestos free.

3.4.5.3 Automatic or semiautomatic transmission. When specified (see 6.2), the vehicle shall be provided with an automatic or semiautomatic transmission. The transmission shall include a hydraulic torque converter and not less than four forward gear ratios. The normal driving range selector position shall provide not less than four gear ratios without movement of the selector. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine.

3.4.5.4 Power takeoff. When a power takeoff is furnished, it shall be of a rated capacity to operate powered equipment. Controls to operate the power takeoff shall be located in the truck cab accessible to the seated driver. A caution plate or decal reading "DO NOT OPERATE VEHICLE AT HIGHWAY SPEEDS WITH POWER TAKEOFF ENGAGED" shall be installed so as to be readily visible to the seated driver.

3.4.6 Driveline comments. Driveline components shall be adequate to transmit the maximum delivered torque of the engine, as developed through the maximum gear train reduction, in proportion to the number of driving axles furnished.

3.4.7. Frame. The chassis frame shall be the manufacturer's standard for the model vehicle furnished. Chassis frame rails shall not project beyond the rear end of the body.