Controls

Hydraulics

Feller-Buncher (Linde Hydraulics)

Linde components are robust, field-tested and designed for a long service life even in heavy duty applications. The example design depicts the propel drive system in a closed circuit, which provides precise, controlled directional stability and wear-free steering, especially with regard to soil protection. The saw is driven by a separate drive in an open circuit. The other machine functions are realized using an LSC valve block which distributes exactly the demanded flows.

Thanks to the parallel architecture of the LSC System and the block’s modular design, based upon infrastructure modules and subplate-mounted valves, one MCV provides a common basis for differently equipped machines. In a machine with an open circuit drive system design, the other components do not change greatly: The MCV block can simply be extended with the required valve sections and pump fittings if necessary. The rest of the components remain the same, which simplifies storage and reduces the training requirements of service personnel.

Beyond that, the modular design offers the ability to customize machines even in the field.

Thanks to the LSC system, no actuator stops unexpectedly or reacts unpredictably when the system’s demand exceeds the diesel motor power. Keeping the actuator responses proportionally identical makes the machine safe to control in any situation. LSC also prevents open circuit propel drive systems from unforeseen turning due to obstacles such as tree stumps. If an obstacle causes the system pressure on the drive side to increase, the oil does not flow to the other side – both drivetrains continue running at the same speed.

A layer-brazed valve block distributes the volume flows in the processing head. It is characterized by an extremely compact design and excellent electro-hydraulic actuation behavior. Linde is also the perfect partner for other forestry machines, as well as wood processing and handling machines.

Linde Standard Product Portfolio

150 kW – 400 kW

Application Example

220 kW, 30 t

Equipment

2x HPV 105-02 E1 (Propel drive)
2x HMV 165-02 (Propel drive)
1x HPR 210-02 E1L (Self-regulating pump
for working hydraulics)
1x HPR 75-02 LP (Self-regulating pump
for saw drive)
1x HMR 165-02 (Self-regulating motor for
saw drive)
1x VT1 (Main control valve MCV)
1x VW12M3 (Control valve at processor)
1x Electronic control unit

Advantages

  • Very compact units
  • Precision control
  • Partially automated workflows

Options

  • Wheel-driven variants
  • Propel drive in open circuit
  • Scalable level of electrification, LSC functions even with purely hydraulic actuation of valve sections

(Ref. Linde Hydraulics)

GS Global Resources Engineered Solutions 

Feller-Buncher (Linde Hydraulics)