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APPLICATION FUNCTION FUNCTION APPLICATION
A tiltrotator can be best described as a "wrist" between the
A timber harvester is generally used in rough terrain, far away
TILTROTATOR arm of the excavator and the bucket, or another tool attached from modern civilization. It is exposed to extreme weather FOREST
conditions in the forests and is designed for temperatures
to the tiltrotator's quick coupler. The tiltrotator comes with
an integral quick coupler and rotary swivel and is typically
ranging from very warm to extremely cold. The timber har-
controlled using the machine's two or four electro-propor- vesting head on the machine's boom is very exposed and
tionally controlled hydraulic lines, giving access to the auxi- therefore extremely stable. Nevertheless, it must be possible
A tiltrotator on an excavator is ideal for a liary hydraulic functions. This allows the user to power and to control the many moving components with high precision HARVESTER
wide range of applications including const- manipulate other worktools below it, such as a breaker, grap- and reliability.
ruction sites, road construction, utility work, ple, or auger, thereby significantly increasing the excavator’s The dimensions and design of the harvesting head and the hy- Harvesters are timber harvesting machines
efficiency on the jobsite. In-cab electronic control systems
cable laying, and landscaping. The tiltrotator enable the operator to fully control the machine through the draulic components used are largely determined by the size of that have made it possible to fell and prepare
the log and the type of wood to be harvested. The hydraulics
enables the excavator bucket to rotate 360 joysticks. are used to control the feed rollers or rollers, the measuring trees without heavy manual labor since the
degrees and tilt up to +/- 45 degrees, increa- devices, the chainsaw drive including the chain tensioner, the early 1980s. The so-called harvesting head
sing the excavator's flexibility and precision. chain lubrication, the bar feed and the delimbing knives and at the front of the machine's boom is respon-
color marking unit. Thanks to their high precision, robustness
Key advantages include reduced time when and reliability, Wandfluh's proportionally or mechanically ad- sible for marking, clamping and felling the
digging, contouring, and backfilling is made justable pressure and flow control valves have been used for trees. These are then fully automatically de-
easier with enhanced precision and versatili- this demanding work for many years. limbed, debarked and cut to length for trans-
ty, while Improved agility means the tiltrota- portation according to the specifications.
tor's 360-degree turn radius allows digging
at limitless angles without the need to repo-
sition the excavator.
COMPONENTS
Mono block and modular valves CMV(A)-06), as well as NG4
and NG6 size flange valves are small and result in ultra com-
pact manifold assemblies that can be mounted internally to
the tiltrotator unit for ease of connections and stiff system COMPONENTS
control. Screw-in-Cartridge relief valves and poppet style Common standard valves are used on a harvester, such as the
on/off valves are used to protect and isolate functions as MVPPU10 pressure relief valve for controlling the feed roller
required. and delimbing knives or the BDIPM22 pressure control valve
for controlled guidance of the saw blade. On the other hand,
SPECIALTIES numerous customer-specific special valves are adapted to
• Compensated LS Valves allowing a load-independent si- the respective harvesting head, for example for pilot control.
multaneous work of tilt an rotate
• Pressure control valves with precision control to set force SPECIALTIES
and torque
• Pressure relief valves with fast response time and low
• High flow valves for fast bucket rotation hysteresis
• Proportional, high repeatability flow smooth speed control • Pressure control valves with fast response time for pres-
over entire machine range sure build-up and relief
• Valves with vibration, dirt and water resistance • Valves with high dirt and water resistance
• Special IP69 solenoid connectors for reliable operation • Special solenoid coils for use in warm climatic conditions
6 WANDFLUH MOBILE WANDFLUH MOBILE 7
