MIL-T-12407 Trucks: Patient Transport, Van Conversion, Diesel Or Gasoline Engine Driven, 4X2 And 4X4, Modified CommercialThis specification covers forward control, diesel or gasoline engine driven, four-wheel, two-wheel and four-wheel drive commercial trucks converted for use as 4 litter patient or 8 seated passenger patient transport vehicles.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30

MIL-T-12407X(AT)

3.4.3.1 Air cleaner. An air cleaner shall be furnished.

3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier Safety Regulation 393.83. The exhaust tailpipe shall extend to the rear of the body or to the side behind the rear wheels, and shall be so located as to minimize the possibility of exhaust fumes entering

the body.

3.4.5 Gear train. The gear train and components torque capacity shall be adequate to transmit the maximum delivered torque of the engine, as developed through the maximum gear train reduction.

* 3.4.5.1 Automatic transmission. Unless otherwise specified, (see 3.4.5.2), the vehicle shall be provided with an automatic transmission. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. The transmission shall have not less than three forward gear ratios and one reverse gear ratio. The transmission shall include

a hydraulic torque converter and an oil cooler.

* 3.4.5.2 Manual transmission. When specified (see 6.2), a manually shifted transmission shall be provided. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. The transmission shall have not less than three forward speeds and one reverse speed. The transmission shall provide for the maximum ease of shifting with synchronized shift for at least the two highest forward speeds. Transmission and axle gear ratios shall be selected to provide the performance specified in 3.3.1 through 3.3.1.2.

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

* 3.4.5.4 Transfer case. Model 4x4 vehicles shall be provided with a two-speed transfer case. The transfer case shall provide for driver selection of either two-wheel or four-wheel drive. The speedometer shall read accurate speed (mph) with the speed selector in high or low range.

3.4.6 Driveline components. The 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.

3.4.6.1 Heavy duty skid plate (model 4x4). Unless otherwise specified (see 6.2), a heavy duty skid plate shall be installed protecting the engine and transmission (from ground contact) if there is less than 15 inches of clearance to the ground. The skid plate shall be demountable for servicing the engine and the transmission. Openings shall be provided to enable draining of the transmission and servicing the underside of the engine.