The predecessor 840 was Alstor's first hydrostat machine and quickly became a favorite among forest owners and contractors. The possibility of equipping the machine as a combined forwarder and harvester has been very popular and a lot of focus has therefore been on further improving this concept.
With the Alstor 850 series, we take the step towards a fully professional machine, built like a large machine but in a minimalist way to minimize complexity, maximize serviceability and operational reliability.
The components in the new powertrain come from well-known suppliers for quality and long-term sustainability.
Driveline
With the new models, we have worked hard to simplify and streamline the drivetrain to get more out of the engine and make the machine as easy to drive as possible.
The hydrostatic transmission is speed controlled which prevents the engine from being overloaded and maximizes traction versus engine power at any given time.
A traditional high gear is no longer available, but the machine always provides full traction at start and the speed can then be adjusted completely steplessly 0-16km/h (forward) 0-10km/h (reverse) without stopping for changes. Permanent 8-wheel drive with the cardan means that you always have drive and brakes on all 8 wheels.
Lockable front and rear differentials provide significantly better turning radius in the woods than a rigid axle, while the ability to lock the differentials provides maximum passability in difficult terrain.
The machine is now equipped as standard with an automatic parking brake, which brakes the machine automatically when the drive pedal is released or if the engine is switched off.