TEST REPORT Traction Winch Komatsu SPW OWNER OF THE TEST CERTIFICATE: Applicant/distributor: Komatsu Forest GmbH Allmendstraße 12 72189 Vöhringen-Wittershausen Internet: www.komatsuforest.de MANUFACTURER: Komatsu Forest GmbH Allmendstraße 12 72189 Vöhringen-Wittershausen This publication was supported by the Federal Ministry of Consumer Protection, Food and Agriculture and the State Forest Administrations as a result of a decision by the German Bundestag and the federal Forestry agencies Kuratorium für Waldarbeit und Forsttechnik e.V. (KWF) Spremberger Straße 1 Telephone: 06078-785-0 D-64823 Groß-Umstadt Fax: 06078/785-39+50 E-mail: pruefung@kwf-online.de Internet: http://www.kwf-online.de Traction winch Komatsu SPW Evaluation – review Test item Test result Evaluation Chief application field Traction aid for forwarders working on slopes with an average gradient of up to 55% (upwards)* Construction Hydrostatic 9-fold capstan winch with an adjustment motor, continuous speed control and separate rope storage, forced spooling at the storage drum and rope puling force control; mounted either to forwarder rear bogie or may be attached to harvester (rear/front); double cable feed pulley with two equal sized sheaves; open construction for forwarders (rope storage capacity 418 m), compact unit for harvesters (rope storage capacity 300 m) Operation Control Radio remote control for controlling the functions pulling, stop, spooling out, fast gear, throttle as well as motor start and motor off for setting up the winch; control unit in the machine with a operation mode selector for automatic mode, road mode and radio control mode; Adjustable potentiometer for continuous regulation of line pull; displays showing selected line pull, spooled out cable length, drum pressure, gradient; optical and acoustic alarms signalling excessive gradient, cable beginning and cable end + Control elements Gentle manual operation of the winch using radio control; two spooling speeds in radio control mode; useful menu; labelling of radio control unit could be improved; continuous control of line pull in automatic mode; front or rear mounting on harvesters must be preselected manually ++ Spooling quality Very good due to forced spooling device and separate rope storage; Amount of cable on the drum and remaining cable length are monitored ++ Cable guidance Complicated mechanically guided forced spooling device; cable tensioner and cable delivery system; lateral cable pull and negative pre-tensioning of cable on the drum are negligible despite compact size of unit; complex cable guidance over several pulleys ++ Line pull generation Smooth driving and braking in drive mode; continuous control of line pull; slippage negligible; very constant line pull in each setting, independent of driving direction (some deviation at higher driving speeds) ++ Dimensions Modular construction for forwarders with drive unit (930 mm/1380 mm/490 mm) and rope storage (950 mm/700 mm/730 mm);removable compact unit for harvesters (930 mm/600 mm/1060 mm) + (Length/width/height) Accessibility Large maintenance apertures in the forwarder unit provide good access; access to the very compact package for harvesters is satisfactory Work safety Advised by DPLF on aspects of work safety Economy 2/5 +/o Purchase price Complete winch unit for harvesters: € 65000,- (without front mount) Complete winch for forwarders: approx. € 65000 Maintenance Central lubrication system for daily lubrication; monthly additional maintenance effort approx. ¼ hour (cable control) Special features Open drive circuit; forced spooling; road mode for driving on access roads without line pull; harvester winch can be rear or front mounted: (rear mounting with angle adjustment, front mounting fixed) ++ = very good, + = good, o = satisfactory, - = adequate, -- = inadequate + (* manufacturer's declaration) Technical data Type Weight complete unit, empty Additional equipment Functions Drive Transmission Braking Rated line pull Line pull uphill/downhill (measured): Setting range: Resulting adhesion coefficient uphill/downhill Drum diameter inner Komatsu SPW 248 / SPW 253 Total weight, forwarder, tested version: 21320 kg Total weight, harvester, tested version: 22460 kg extra weight of unit on harvester: approx. 1400 kg (traction winch) Slope adjuster for forwarders Automatic mode for uphill and downhill driving with pre-set line pull, spooling, cable delivery (hydraulic rope tensioning device); normal speed and fast gear; drive mode without line pull with pre-set driving speed; engine start and stop; working fuel supply on and off; hydrostatic, open circuit Hydrostatic transmission; forward and backward drive as well as hydrostatic overload restriction hydrostatic 72 (pressure controlled maximum line pull kN approx. 30...65 (depending on setting) kN 10 - 72 continuous control spooling: 10 - 72 pay out: 10 – 72 kN empty: 14…31 loaded: 10...21 k.A. % % mm Drum diameter outer k.A. mm Drum width k.A. mm Drum core k.A. Line pull out force 0 (cable delivery system) N Height of the cable inlet Average drive speed at nióminal speed uphill/downhill* Maximum drive speed ** approx. 730 mm 0.86 ± 0.19 / 1.01 ± 0.20 km/h Assisted by winch approx. 2.1; max. 2.5*** in road mode 4*** km/h km/h 10...72 10...72 None (capstan winch system) 190 14 kN kN % MPa mm Winch line pull: Full drum Bare drum Deviation from average Operating pressure Cable diameter 3/5 Cabel equipment: Cable length Cable construction Forwarder 418*** m Harvester 300*** m Python 6 R+F6-braids, compacted (wrought), crossed lay Minimum breaking force 185.7 Weight per meter 1,01 kN kg/m Rope end connections Pressed ferrules (in compliance with EN 13411-3) Tested strength of cable end connection Operator's manual 80% of nominal cable tensile strength (according to standard) Comprehensive and precise manual; easy to read with many illustrations; includes advice for selecting an anchor tree Not presented Spare parts list *Forwarder ** Harvester ***Manufacturer's declaration Force measurements winch (practical application) • gradient during the test approx. 13..49 % (average approx. 31 %) • length of the measured skid trail approx. 75 m • soil water content approx. 31...50 % • cone index (CI) before driving 2.7, after driving 3.2 80 Lösen der Haltebremse 70 bergauf Seilkraft [kN] 60 50 40 bergab 30 20 10 0 0 10 20 30 40 50 Fahrweg [m] Figure 1 Line pull on moving machine (evaluated for forwarder winch) 4/5 60 70 80 Summary: Very uniform line pull in accordance with settings on traction winch when driving slowly; regular oscillations at faster driving speeds. Some disparity between line pull during uphill and downhill travel. No jolting recorded when changing travel direction. About half the downslope force is balanced by the cable when driving under load, ¾ when driving unloaded; automatic regulation by electronic control system Construction differences between forwarder and harvester models Test Remaining requirements: presentation of current operator's manual with spare parts list; some proof that access to harvester model of the traction winch when mounted to the front complies with the relevant standards. Recommendations: operator's manual should include information concerning the driving limits on soils with very high water contents Test institute Kuratorium für Waldarbeit und Forsttechnik, Groß-Umstadt Authors Dr. Günther Weise, Joachim Burk, Groß-Umstadt KWF-Test Test no. 5558, 08.11.2011 According to the test regulations, the applicant is entitled to display the test mark on machines of this type and to use the certification for advertising purposes. 5/5