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2. M123 and M125 10-ton 6x6 trucks - Wikipedia

   en.wikipedia.org/wiki/M123_and_M125_10-ton_6x6...

   The front beam axle was mounted on leaf springs, the rear tandem beam axles were mounted on a leaf sprung "walking beam" type suspension. All models shared a 181 inches (4.60 m) wheelbase (measured from the 1st to the 3rd axles). Full air drum brakes were used. The M123 was able to control the trailer brakes independently of the tractor.

3. Relay valve - Wikipedia

   en.wikipedia.org/wiki/Relay_valve

   A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...

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. Articulated hauler - Wikipedia

   en.wikipedia.org/wiki/Articulated_hauler

   The tractor and the trailer sections can move at great angles to each other making for a small turning radius. The trailer axle(s) are driven by a drive shaft exiting the rear of the transmission with splines and universal joints to accommodate the movement between them. All axles are portals with hub reduction and locking differentials ...

6. 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 ...

7. Hydraulic modular trailer - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_modular_trailer

   Tiiger four-axle HMT module at Transporter Industry International headquarters in Haryana, India. A hydraulic modular trailer (HMT) is a special platform trailer unit which feature swing axles, hydraulic suspension, independently steerable axles, two or more axle rows, compatible to join two or more units longitudinally and laterally and uses power pack unit (PPU) to steer and adjust height. [1]