TECHNOLOGY REVIEW – HARVESTERS The Tigercat LH855C
Tigercat harvesters have established an industry- leading reputation for durability, machine availability and longevity – Tigercat
lifts and ample ground clearance. The Tigercat-designed-and-built parallel linkage crane has a 9.3 m reach achieved with a 2 m telescoping stick. The crane base
is equipped with fore/aft levelling to maintain powerful slewing capability in uneven terrain and also has a side tilt function that allows the operator
to reach around standing trees. The operator's cabin has been
carefully designed with emphasis on comfort, ergonomics and visibility. The curved windshield
provides unimpeded upward visibility and extended side and rear windows create a clear sightline to the wheels and the ground, all-important when operating in-stand. The cab is well appointed with high quality, customisable controls that are ergonomically positioned to minimise operator fatigue. Constant temperature climate control and isolation mounting further contribute to the quiet, comfortable working environment. The 270° rotating seat provides ease of entry and exit. The 1135 is powered by the high performance 170 kW (228 hp) Mercedes 906 with dedicated pumps for the drive, harvesting head, and crane functions. The cooling system uses a hydraulically driven automatic variable speed fan for optimal fuel efficiency in cold operating environments. As with all Tigercat machines, the 1135 is designed and built for high uptime and long service life with strong frames, cylinders and
58 International Forest Industries | FEBRUARY/MARCH 2012
pins throughout. The articulation joint is equipped with tapered roller bearings.
Ponsse’s harvester product line development has always focused on productivity and efficiency. As the logging sites are located more and more in demanding conditions such as sloped terrains and soft soils, there are certain aspects in the equipment that have earned special attention in Ponsse’s Research and Development programs, the Finnish CTL specialist told IFI. In slopes and uneven terrains, stability is one of the key factors for efficient harvesting. With an eight-wheeled harvester equipped with suitable tracks, the stability and traction are on a totally different level than with a six wheeler. This makes it possible to operate with a long crane reach while maintaining a safe and comfortable working environment for the operator. “Ponsse Bear 8w has proven to be the ultimate harvester in these
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