Model SP 761 LF - Heavy Duty and High Performance Harvester Head
The SP 761 LF is a compact, heavy duty and high performance harvester head. It is designed according to SP´s Low Friction principle for minimum friction and maximum productivity. The SP 761 LF is suited for working on both large wheel based harvesters as well as tracked harvesters and excavator carriers.
The high capacity in combination with the compact, protected and heavy duty design makes the SP 761 LF able to handle a variety of different demanding harvesting applications with great performance. Regardless if the task at hand is in large diameter soft wood, crooked and limby hardwood or dense mixed wood stands you can count on the SP 761 LF to get the job done. Equipped with the specially designed processing knives and a topping saw the SP 761 LF becomes a dedicated processing head with great performance processing decked wood out of a pile. The SP 761 LF truly is a compact and heavy duty all-rounder. The SP 761 LF reaches top performance in stands with a diameter of 25 to 50 cm (10 - 20”)
The SP 761 LF reaches top performance in stands with a diameter of 25 to 50 cm (10 - 20”) bhd, but is thanks to the LF principle also capable of efficiently working larger tree sizes.
Fixed robust top knife, casted in high strength steel for strongest design and long life.
The three wrap around knives are all casted in high strength steel and are of a very robust design for highest durability and longest life.
The feed roller suspension offers a proportional angle with more carrying force the larger the tree.
The length measuring unit is controlled by a strong and fast cylinder. In combination with the large movement of the measuring unit out from the frame this ensures perfect measuring results also on crooked and bumpy stems.
The cutting device is the robust and fully automatic Hultdins Supercut 100 with integrated chain lubrication and hydraulic tensioning of the chain. 32 cc saw motor in combination with QuickCut ensures a fast and efficient cutting.
The fixed knife integrated in the saw box helps with the delimbing of the lower part of the tree when positioning the head for the felling.
Feed motors are Poclain piston motors known for their high reliability and good starting torque. Different feed motor sizes are available for optimization of different operations and carriers.
Thanks to the casted center piece, the frame consists of a minimum number of plates. Together with the fact that the complete frame is machined after the welding this ensures a perfect fit and a minimum of tension, resulting in highest possible durability robustness.
- Thanks to the casted center piece, the frame consists of a minimum number of plates. Together with the fact that the complete frame is machined after the welding this ensures a perfect fit and a minimum of tension, resulting in highest possible durability robustness.
Extremely and robust and torsion resistant tilt frame. Dampers on both tilt up and down minimizes vibrations and wear. Protection plate for hoses and adapters inside tilt frame.
Tilt cylinders placed inside tilt frame with adapters and hoses behind cylinders for optimum protection.
Robust valve cover with hinges for fast and easy maintenance. The tight fit prevents packing of snow, dirt and debris.
The diameter measuring is linked to both upper knives for best accuracy. The encoders are mounted in completely sealed off steel housings placed inside the frame for best protection and longest life.
The delimbing knives are equipped with long and perfectly designed cutting edges. This ensures that the limbs are cut of and not broken of. This minimizes the friction during the feeding and gives a perfect delimbing result.
Feed motor hoses are placed on top of the motor arm and completely protected by a robust cover for a minimum of down time.
The hydraulic valve bank is the very reliable Parker L90/ K220. It is working with a very good hydraulic efficiency minimizing energy losses and the build up of heat in the hydraulic system. In combination with the computer control system and the proportional pressure system this makes the SP 761 LF a very fast, productive and fuel efficient harvester head.
- Min. pump capacity: 250 l/min
- Rec. working pressure: 30 MPa
- Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
- Roller motors: 934, 1043, 1248 cc
- Max. opening: 700 mm
- Feed speed: 0-6 m/s
- Feeding force: 46 kN
- Proportional pressure: Yes
The SuperCut 100 is a very powerful saw unit with integrated chain lubrication and hydraulic tensioning of the chain. Together with SP’s QuickCut, this optimises cutting time and minimises the risk of cutting cracks.
- Cutting diameter: 750 mm
- Chain speed: 40 m/s
- Saw motor: 32 cc
- Saw unit: SuperCut 100
- QuickCut: Yes
- Tow sawing (option)
- Cutting diameter: 380 mm
- Chain speed: 40 m/s
- Saw motor: 20 cc
- Saw unit: JPS
Proportional delimbing knife pressure in relation to trunk diameter for minimum friction and maximum production. Individual setting of upper/lower knives and for different tree species for optimum performance.
- Movable knives: 3
- Fixed knives: 2
- Delimbing diameter tip to tip: 510 mm
- Delimbing diameter incl. lower knife: 550 mm
- Min. delimbing diameter: 40 mm
- Proportional pressure: Yes
- LogHold: Yes
Weight and dimensions
Despite its enormous capacity, the SP 761 LF is suitable for more than just large-diameter felling thanks to its compact design.
- Width closed: 1400 mm
- Width open: 1920 mm
- Height: 1850 mm
- Weight: 1680 kg
- Height with top saw (option): 2030 mm
- Weight with top saw (option): 1850 kg
The SP 761 LF can be fitted to both conventional forest machines and excavators. In order to ensure good function, please consult your nearest SP dealer or SP staff.
Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
- Optimum trunk diameter*: 25 - 50 cm
- Max. rec. trunk diameter*: 55 cm
* Diameter at breast height, measured 1.3 m up the trunk.
The SP 761 LF has a very high level of standard equipment. However a number of different options are available for being able to optimize the harvester head for different applications, requirements, carriers and conditions. The below list contains the most common options. For more information please contact your nearest SP dealer.
Colour marking SUPERMARK
This equipment is used for making the forwarding easierwhenthe qualities/lengths are very similar to each other and difficult to spot with pure eye sight. As the saw bar cuts through the stem SUPERMARK sprays a colour on the cutting area, marking it with a specific colour corresponding to the particular length/quality. By combining the two colours it is possible to mark up to 3 different qualities.
The top saw is a very useful option in many applications, for example in heavy limbed hardwood, storm timber with broken tops or when topping trees in a full tree length operation. The top saw unit on the SP 761 LF is integrated in the frame making it very compact and robust.
The processing knives have an extended and rounded tip in order to simplify the grabbing of trees out of a pile when working as a processor.
In order to optimize the SP 761 LF for different carriers, species and conditions there are several different motor sizes to choose from. Do you need maximum speed, torque or a good mix?
In order to optimize the SP 761 LF for different species and conditions there are various types of feed rollers available to choose from.Find end sensor
Makes operations in pre felled woods easier and more productive. With the find end sensor the harvester head reverses down to the root end of the stem, stops and sets the length to zero, all with the press of one button.Complete measuring systems
The SP 761 LF can be supplied with one of the following three complete versions of the measuring system Dasa5:
Dasa5 Bucking – Dasa5 Bucking Prio – Dasa5 Bucking Prio CPreparation for measuring systems
The SP 761 LF can be supplied prepared for machines equipped with any of the following measuring systems:
- Dasa4 – Dasa5
JohnDeere Timbermatic 300/3000/H09
Rotators - Swing dampers - Joysticks - Parts kits