Special on hydrostatic front-wheel drive
MAN has launched a web-special on the trucking company’s unique front-wheel drive trucks last week.
Called HydroDrive, the system drives the front axles using a hydrostatic motor on each wheel.
MAN said it was the first “to bridge a gap in the market for those customers who drive largely on roads, but in some situations require additional traction from the front axle without having to purchase an all-wheel drive truck” when it launched the system 10 years ago.
These customers include refuse collectors, construction vehicles, fire service vehicles and fuel tankers.
A hydraulic pump drive the hydrostatic motors with pressure of up to 420 bar. The drive can be engaged by simply turning a rotary switch, both while driving and under load — the driver can thus master gradients safely without having to stop.
The additional traction is also available in reverse and when coasting. This increases the brake output of the continuous braking systems and significantly improves the vehicle’s manoeuvrability on slippery surfaces and therefore driving safety, be it for 4x4 or 8x6 drivetrains.
The system also scores well on two main benefits for body manufacturers involved, for example, with setting up tipper bodies on the HydroDrive chassis. No components protrude beyond the upper edge of the frame and a large selection of power take-offs are available.
— Wheels Reporter.
The type of slippery and narrow work areas in which MAN’s HydroDrive drives the front wheels to best effect.