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2. Air suspension - Wikipedia

   en.wikipedia.org/wiki/Air_suspension

   Air suspension is a type of vehicle suspension powered by an electric or engine-driven air pump or compressor. This compressor pumps the air into a flexible bellows, usually made from textile-reinforced rubber. Unlike hydropneumatic suspension, which offers many similar features, air suspension does not use pressurized liquid, but pressurized ...

3. Mack Anthem - Wikipedia

   en.wikipedia.org/wiki/Mack_Anthem

   A ladder frame with beam axles is used. There is a single front axle on semi-elliptical leaf springs. The base rear suspension is a Mack tandem with two powered axles, a single rear drive axle with an undriven pusher axle is available. Wheelbases are from 174 to 203 inches (440 to 520 cm) A set-back front axle is used.

4. Mack Granite - Wikipedia

   en.wikipedia.org/wiki/Mack_Granite

   The Twin Y air suspension has trailing arms that fork to the rear and attach to both the top and bottom of the axle. There is an air bag behind the axle on each side and each axle is sprung individually. They are rated at 40,000 pounds (18,000 kg). [12] Walking beams have low bogie pivots with a balance beam going out and under the axles. Any ...

5. Mack R series - Wikipedia

   en.wikipedia.org/wiki/Mack_R_series

   The Mack R series (also known as the Mack Model R) is a series of trucks that was manufactured by Mack Trucks from 1966 to 2005. The successor of the Mack B series, [2] the R was a heavy-duty truck (Class 8) with a conventional (bonneted) cab configuration.

6. Double dump valve - Wikipedia

   en.wikipedia.org/wiki/Double_dump_valve

   Double dump valves have two trap-door flap plates which open and close on an alternating cycle. The top gate opens to allow collected material to drop through onto the bottom gate. The top gate then re-closes to prevent air leakage above the valve. The bottom gate then opens to allow material to pass completely through the valve.

7. M39 series 5-ton 6×6 truck - Wikipedia

   en.wikipedia.org/wiki/M39_series_5-ton_6×6_truck

   There were three chassis wheelbases (measurements are from the centerline of the front axle to the centerline of rear tandem). The M61 short wheelbase chassis, used for tractors and dump trucks, is 167 inches (4.24 m), the M40 long chassis, used for cargo and wreckers, is 179 inches (4.55 m), and the M63 extra-long chassis, used for long cargo ...