MIL-T-11663 Truck, Materials Handling, Container Hoisting, Rear Hoist, 21,000 To 32,000 Pounds Gvw, 4X2This specification covers diesel or gasoline engine driven, four-wheel, two-rear-wheel drive materials handling trucks having gross vehicle weights GVW of 21,000 to 32,000 pounds, for normal operating conditions. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-11663K

* 3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier Regulation 393.83. Vertical exhaust systems, if furnished and if capable of being reached easily by personnel entering or leaving either side of the cab, shall be provided with a heat shield. Vertical exhaust systems shall be provided with a hinged rain cap.

3.4.4.1 Exhaust system safety shield. The exhaust system or the hydraulic system shall be shielded so that, in the event of a hydraulic line rupture or hydraulic fluid leak, the hydraulic fluid will not come into contact with any part of the vehicle exhaust system.

3.4.5 Transmission. Unless otherwise specified (see 3.4.5.2), a manually shifted transmission with not less than five forward speeds shall be provided. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. When more than five forward speeds are required, a multispeed transmission or auxiliary transmission may be provided. Gear ratios in the transmission and axle shall be matched to provide a progressive shifting pattern throughout the complete range and shall provide the required vehicle performance (see 3.3.1 through 3.3.1.3). The transmission shall be provided with SAE J704 power takeoff openings at the right and left sides. The transmission shall provide for maximum ease of shifting

in all speeds.

* 3.4.5.1 Clutch. The clutch shall be the largest capacity clutch offered for the type and class vehicle and engine furnished, with the clutch torque capacity exceeding the maximum delivered engine torque.

* 3.4.5.2 Automatic or semiautomatic transmission. When specified (see 6.2), the vehicle shall be provided with an automatic or semiautomatic transmission. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. 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 transmission shall be provided with SAE J704 power takeoff opening(s).

3.4.5.3 Power takeoff. The power takeoff 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 DRIVE VEHICLE WITH POWER TAKEOFF ENGAGED" shall be installed so as to be readily visible to the seated driver.