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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]
The simplest trailer designs have only two axles, but heavier loads frequently require more than this. Multiple wheels per axle are common, usually four, sometimes a hydraulic modular trailer is employed which can have eight or more axles which are hydraulically steerable and height adjusted.
The first modular self-propelled trailers were built in the 1970s. In the early 1980s, heavy haulage company Mammoet [6] refined the concept into the form seen today. [7] They set the width of the modules at 2.44 m, so the modules would fit on an ISO container flatrack. They also added 360° steering. [8]
Moling avoids the need to dig a trench and can be used to lay water pipes and the heating coils of heat pump systems. [1] Recently moles that are steerable have been developed allowing an operator to correct the track of the mole and to achieve curved bores. Mole. The standard approach to moling is to dig a hole about 1 m square and 2 m deep.
Hydraulic modular trailer, 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 to steer and adjust height.
The second order (8130-8144) retains their steerable trucks. The third batch (8000-8064) will feature an Evolution Series sized fuel tank and radial trucks. In 2019 a fourth batch of rebuilds happened, 8145-8160 & 8064-8080 from the 95/9600-series. In 2021 both the 8500 series is slated to be rebuilt at 8201-8280 and the 8100-series be ...