Forestry winches
Forestry winch 90 GKpower
Forestry winches

Forestry winch 90 GKpower

90 GKpower is a professional forestry winch with a constant pulling force of 8.5 t. A thinner (lightweight) wire rope allows greater productivity and faster timber harvesting.

90 GKpower

About the machine

Forestry winch 90 GKpower with constant pulling force 8.5t the largest and robustest in its category. The winch is positioned closer to the tractor and the pulley is fixed lower, which improves and lowers the winch center of gravity. Therefore, there is less chance for the tractor to be lifted. It has an extra large drum capacity, which allows more wound up wire rope. For easy work there are large storage places (PATENT) on the front of the winch, that the dirt from the wheels of the tractor does not get between the chain and other equipment. In order to facilitate the manipulation and stacking of logs, there is also a hydraulic hinged butt plate.

Standard:

  • Adjustable brake release speed and brake force
  • AUTO STOP function (limit switch)
  • Unwinding device with two pulleys
  • Electronically adjustable brake opening time
  • Remote control Terra FA5-A1
  • Easy setting up
  • Maxi drum
  • Large storage spaces in front of winch
  • Plenty of storage area for additional equipment
  • Hydraulic hinged butt plate

Option:

  • Foldable window guard
Adjustable speed and braking force

Adjustable speed and braking force

Adjustable braking force (progressive brake system) allows the wire rope to be unwound without the unwinding device, regardless of the force on the pulling rope between the winch and the load.  

AUTO STOP
AUTO STOP

AUTO STOP function (limit switch) automatically stops the function of winding the wire rope on the drum. This function prevents mechanical damages of the unwinding device, entanglement and wire rope damages.

Unwinding device
Unwinding device

To make the wire rope unwinding easier you can choose a winch with an integrated unwinding device. This type of winch also guarantees a constant tension of the wire rope between the unwinding pulley and the drum, thus preventing damage to the drum or pulley and enabling a longer service life.

Active force control

Active force control

Active Force Control is a special pulling force measurement and regulation solution. The pulling force is measured directly on the wire rope and is electronically regulated. Thus, the pulling force does not depend on the wear of the clutch, temperature and humidity, the preload of the wire rope and the amount of wound wire rope on the drum. Thus, the pulling force remains the same at all times, the pulling rope is thinner and consequently longer, and the tractor can be of lower power. A lighter wire rope helps to increase productivity and faster wood harvesting on the one hand and to reduce user fatigue on the other.

Sensor
Sensor

The sensor measuring pulling force of the winch is directly installed on the pulling rope to enable precise measurement of the force on the pulling rope. The measured pulling rope force is regulated with the clutch.

Remote control
Remote control

Remote control Terra funk FA5-A1 for precise break release.

The electronically adjustable brake opening time
The electronically adjustable brake opening time

The electronically adjustable brake opening time allows for a slower release of the tension of the wire rope, thus preventing the drum from uncontrolled rotation and subsequent entanglement of the wire rope.

Drive
Drive

The drive consists of a worm gear enabling high gear ratios, and spur gears elements immersed in the oil bath which enables higher efficiency, reduces maintenance costs and increases its life span. The torque from tractor is transited to the worm gear on the winch over a triple-strand roller chain.

8-plate clutch
8-plate clutch

The multi-plate clutch prevents overheating/slipping of the clutch (8 plates).

HAWE
HAWE

HAWE electromagnetic control valves with high pressure filter in the control block. Hydraulic components are galvanically corrosion protected. The oil tank is made of stainless steel.

PTO attachment
PTO attachment

The PTO shaft is installed at the rear side of the winch, enabling a better stability of the tractor and winch and reducing the risk of damaging the cardan shaft.

Pre-loaded wire rope tensioning roller
Pre-loaded wire rope tensioning roller

Pre-loaded wire rope tensioning roller for more precise wire rope winding.

Guide
Guide

A guide for precise winding of wire rope on a drum.

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Optional equipment

Recommended wire rope thickness according to the maximum wire rope length:

  • 13 mm/110 m

The wire rope must be up to standard, the breaking force of the wire rope must be at least twice as much as the pulling force.

Technical data

Model
90 GK power
Pulling force (kN) 85
Braking force (kN) 106
Wire rope medium speed (540 min-1) (m/s) 0,56
Drum capacity - wire rope length/diameter (m/mm) 130/12 110/13
Recommended tractor power (kW/hp) 88/120
Max. RPM (min-1) 750
Linkage category II, III
Control Electro-hydraulic
Winch drive Worm gear
Pump Gear pump
Number of clutch plates (pcs) 8
Butt plate width/weight without wire rope (mm/kg) 2200 / 920
Hydraulic hinged butt plate width/weight without wire rope (mm/kg) 2400 / 1295
Depth (mm) 970
Height (mm) 1500
Height with window guard (mm) 2300
Accessories
Model
90 GK power
Remote control
Unwinding device
Wire rope guide
Auto Stop
Valve that ensures constant wire rope tension
Valve for wire rope unwinding speed regulation
Adjustable braking force
Trailer hitch
Foldable window guard
Chainsaw holder
Fuel tank holder
Pickaxe holder
Storage for forestry chocker chains

● - Standard, ○ - Option, / - Not possible

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