The new harvesters are the 901, 911, 931 and 951.
The 901 is a thinning specialist, the 911 is an all-round harvester, and the 931 and 951 are used for final felling. One of the key areas of focus was operator ergonomics. The new harvesters have built on the successful centrally placed crane and cab, and a single axle, that together with the cab tilt cylinders provide good stability and operator comfort. The cab has increased up and down visibility, 360 degree cab and crane rotation, and reduced noise levels. The harvesters also make use of the industry’s first remote-controlled keyless system, which can be used to control the heating and lighting up to a distance of 300 m (1,000 ft). The keyless system is coded per operator, so that each operator can automatically log into the MaxiXplorer with their profile. The cab has a new media hub, called MediaZone, which has inputs for both USB and AUX connectors.
The harvesters make use of a new three-pump hydraulic system which allows unique interaction between the crane, head and transmission. This allows continuously sufficient pressure and power for several tasks to be performed at the same time. High flow rates can be achieved at low engine revolutions. The working hydraulics are separated from the transmission and are split into two hydraulic circuits. The working hydraulics circuits can be operated separately or together, depending on the function and oil requirements. This allows the operator to use several crane and head functions together with maximum hydraulic power, for example slewing the crane, feeding trees and manoeuvring the machine.
Other features of Komatsu Forest’s new logging machines include that engines used in the harvesters are Stage IV and Tier 4 Final compliant. The harvesters use Komatsu’s Comfort Bogie, where the portals are concealed inside the rims, ensuring good ground clearance. The harvesters all use parallel boom cranes that have a brake link between the crane and the head. Source: www.komatsuforest.com