The skidder (skidder)

This vehicle, whose main task is the collection and transportation of the trees to the place of storage by the method of partial loading (dragging).

Equipment skidder:

  1. Capture – there are many options;
  2. Winch and cable – used to transport logs or whole trees;
  3. Blade for leveling the soil, adjusting the skidding track;
  4. TrLevoca arch single or double action.

 

Depending on the working conditions, ground conditions and the ability to get to the whips or trees, the skidder may be equipped with locking or cable winch.

As a rule, wheeled skidders are equipped with a small front blade, which is clearing the roads and the leveling of the ground.

The structure of the wheeled skidder is based on an articulated chassis where the cab is mounted on the front axle, a winch with a seizure or a platform on the back. Many modern skidders equipped with a winch and grip.

Types and characteristics of skidders:

Бесчокерный скиддер (скиддер с захватом) и чокерный скиддер.

As a rule, Beschetny the skidder (skidder with capture) to effectively work together with Feller-Bunchers machine and a skidder choker is mainly used for skidding trees felled by workers manually.

Beschetny the skidder allows you to carry more than one whip at a time, and by the choker cable skidder attach chokers for skidding 3-10 whips. The number of chokers used depends on the size of the transported trees. The rear part of cable skidders are equipped with a fixed platform that allows you to lift the base of the trees.

Skid plate arch single or double action.

The grip is attached to the machine using the skidder arch. The arch provides lift and the exact position of capture.

Arch single action is a mono-boom with one set of cylinders. A boom gripper moves horizontally and vertically simultaneously, in one motion

The capture of the arch dual action is attached to two lift arms, each section is controlled by a set of cylinders. One part is attached to the grip vertically, it controls the horizontal movement; the other part is attached to the vertical portion horizontally and controls the movement of the gripper vertically. This type of capture requires control of the operator.

Operating conditions:

There are three factors that affect the ability to work on slopes:

 

  1. Security – the slope on which equipment can safely operate without the risk of a coup or tilt;
  2. Overcoming bias – angle at which equipment can safely perform the work. Exceeding the permissible limits leads to the pouring of the fluid machines of the containers and lower the traction of the engine;
  3. Soil disturbance and erosion soil – this factor is important depending on the type of soil, humidity level and precipitation patterns.

The angle of slope, which can operate a skidder, partly depends on the direction of skidding. Work on the positive bias when the cargo is transported down the slope, preferably working on a reverse slope, as in this case, skidding contributes to the force of gravity. When doing work on the positive slope, consider the type of ground, power, and traction machinery.

To work on waterlogged soil, wheeled skidders are equipped with dual tires or all-terrain tires.

Choker skidders are mainly used when working on uneven boggy areas and loose soils. The logs are pulled a rope from the marshland at the time when he is a choker skidder is on a solid, stable surface.

Generating choker skidding by the skidder operator must exit the cab to pull the rope and attach the chokers to the whips. Working with a skidder choker you need to be extremely careful, as the cable could be damaged by inappropriate usage, when hitting tree stumps or on the branches during transport. Damage to the cable is a potential danger not only for the operator but also others. Unlike the choker, bessokirnaya skidders provide an additional level of security allowing the operator to remain in cab during skidding.

Process whiplash blanks:

Training whips Feller-Bunchers machine:

TIMBERPRO TL735B in Nutricia OOO "Torion"

Neat whips, ready for the transport of the skidder:

The skidder makes hauling wood to the place of discharge

TIGERCAT 635E in Nutricia OOO "Torion"

Three groups of skidders manufacturers John Deere, Caterpillar and Tigercat:


John Deere

  • Facilitated operation and reduced operator fatigue thanks to the auto-switch transmission, which allows to eliminate excess movement during manual switching.
  • Reliability the unique design of the winch with a direct drive is provided by a wet clutch discs and spring for hydraulic brakes.
  • Increased productivity is becoming more economical with locking torque Converter, which transmits more power to the wheels without burning additional fuel.
  • Transmission PowerShift™ direct drive delivers maximum power to the bridges.

 

John Deere 640H

 

John Deere 748H

John Deere 848H

Caterpillar

  • The gear ratios are specially selected for power generation at the bridge, providing extended life of the transmission and drive due to a reduced load;
  • Maintained smooth and efficient gear changes thanks to the electronic control clutch pressure (ECPC). The transmission for each coupling there is a valve that regulates clutch operation depending on the working conditions and attitudes of the operator.
  • High maneuverability in all conditions. While in standard mode, all four wheels move independently from each other, on difficult ground, to improve traction and maneuverability, you can lock the front or rear differential independently of each other.
  • The optimum temperature of the machine and avoid contact with debris are provided by a high-performance cooling system and reversing fan.

Caterpillar 535D

Tigercat

  • Hydrostatic drive provides simplified management without switching gear. To minimize wheel slippage and greatly increases performance in difficult terrain due to all the available traction at any speed of the engine.
  • The hydrostatic drive system in tandem with the technology of electronic controls allow to work with variable speed and, if necessary, automatically increase the speed.

Tigercat 635D

We present comparative characteristics of the most popular models of skidders three weight categories.

Skidders – easy group

Mark
John Deere
Caterpillar
Tigercat
Model
548G-III
640H
525D
610C
620D

Engine

Manufacturer

John Deere

Cat

Cummins

Cummins

Model

PowerTech™ 6068H

PowerTech™ Plus 6068H

C7.1 ACERT

QSB6.7

QSB6.7

The degree of emissions

Tier 2

Tier 3

Tier 4

Tier 3

Tier 3

Working volume, l

6,8

6,8

7,0

Power, kW

96

128

142

164

Transmission

Type

PowerShift™ direct drive and auto-switch option

Powershift countershaft

Single-speed mechanical variable-speed hydrostatic

Number of gears: forward

8

6

6

Reverse

7

3

3

Max. speed: Forward speed, km/h

19,5

22

20

17,5

19

Reverse, km/h

14,7

16,5

11,8

Dozer

Width, mm

2184

2184

2678

2285

Capture

Type arches

Single

Solitary.

Double

Solitary.

Double

Solitary.

Double

Max. radius,mm

1970

2518

2917

Max. the boom, mm

2991

2208

2652

Opening, mm

2160

3205

3205

3250

3505

3505

3630

Area, m2

0,74

1,34

1,34

1,21

1,39

1,39

1,58

Winch

 

Option

Option

Option

Option

Option

Rope length, m

15,8 –  77,4

19,0 – 59,0

Traction at high V, kN

141,0  /  85,0

195,0 / 124,0

178

when you standard. V,kN

164 /  99,0

227,0 /    145,0

V winding at high V, m/min

72,0

     –

85,3

41,0

41,0

when STD. V,m/min

61,8

     –

Operating weight

Weight, kg

10768

13745

18935

20065

20525

15875

16440

Skidders – the average group

Mark
John Deere
Caterpillar
Tigercat
Model
648H
748H
535D
615C
625E
630D

Engine

Manufacturer

John Deere

Cat

Cummins

Tigercat

Cummins

Model

PowerTech™ Plus 6068H

C7.1 ACERT

QSB6.7

FPT N67

QSB6.7

The degree of emissions

Tier 3

Tier 4

Tier 3

Tier 4f

Tier 3

Working volume, l

6,8

7,0

Power, kW

128

164

168

194

Transmission

Type

C direct drive

Powershift countershaft

Hydrostatic drive EHC

Number of gears: forward

8

6

Reverse

7

3

Max. speed: Forward speed,km/h

22

20

23

21

19

Back tom/h

16,5

11,8

Dozer

Width, mm

2184

2950

2678

2285

Capture

Type arches

Single

Double

Double

Single

Double

Single

Double

Single

Double

Single

Double

Max. radius,mm

2369

2964

3100

2668

2917

Max. the boom,mm

3505

2811

2900

2208

2652

Opening, mm

2921

3226

3226

3226

3630

3683

3630

3710

3630

3710

Area, m2

1,0

1,4

1,54

1,54

1,58

1,76

1,58

1,76

1,58

1,76

Winch

 

Option

Option

Option

Rope length, m

15,8 – 77,4

19,0 – 59,0

Traction at high V, kN

208,2 – 124

266,1-  159,0

178

when you standard. V, kN

145,0

V winding at high V, m/min

72,0

37,1 –  61,8

85,3

41,0

41,0

when you standard. V,m/min

61,8

Operating weight

Weight, kg

14258

14638

17028

19095

20305

20766

19500

21860

16895

 


Skidders – heavy group

Mark
John Deere
Caterpillar
Tigercat
Model
848L
948L
545D
555D
635E

Engine

Manufacturer

John Deere

Caterpillar

Tigercat

Model

PowerTech

C7.1 ACERT

FPT N67

The degree of emissions

Tier 2

Tier 4f

Working volume, l

6,8

7,0

Power, kW

157

172

186 205

195

Transmission

Type

Mechanical transmission with auxiliary hydrostatic system

Powershift countershaft

Multi-speed Hydrostatic drive

Number of gears: forward

6

6

Reverse

6

3

Max. speed: Forward speed, km/h

25

20

14

Reverse, km/h

18,9

Dozer

Width, mm

2962,4

2678

2285

Capture

Type arches

Double

Double

Double

Double

Max. radius, mm

3007

Max. the boom, mm

3005

Opening, mm

3780

3900

3429

3652

3810

Area, m2

1,77

2,07

1,77

2,04

1,95

Winch

 

Option

Rope length, m

15,8  – 77,4

19,0 – 59,0

Traction at high V, kN

178

when you standard. V,kN

182,3

V winding at high V,m/min

41

when you standard. V,m/min

14,0

Operating weight

Weight, kg

22384

22416

21190

21540

24040