931 Strong and smart
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931 HARVESTERS Maximum reliability and productivity

The new Komatsu 931 is built for truly demanding logging. In several decisive areas it provides the benchmark for future needs of maximum production capacity, eco-friendliness and operator comfort – the most important of which are presented here. Operator environment The Komatsu 931 is the first harvester in its class with a Stage 4/Final engine. It fulfils the most stringent requirements on minimised emissions of environmentally hazardous particles and nitrogen oxides. What's more, the hypermodern engine technology improves fuel economy and considerably reduces noise thanks to its...

Crane placement and work area An impressive 168 kN of traction force and unique interaction between engine, control system and transmission. This is what the 931's new hydrostatic power-optimised transmission gives you. It enables full use of engine power, which is a great advantage when navigating gradients and difficult terrain. There are also several pre-set and taskspecific driving modes. The result is maximised productivity and benefit from every ounce of horsepower and every gallon of fuel. The crane's placement together with the large work area provide the Komatsu 931 with unique...

Unique eco-friendly engine The new Stage 4/Tier 4 Final engine fulfils the market's most stringent emission requirements for NOx and particles. A POWERHOUSE WITH CUTTING-EDGE HARVESTER TECHNOLOGY Super stable The unique solution with the crane placed in the middle of the machine and the coupling between the tilt cylinders and the swing axle provide superior stability. Service advantages squared Everything from improved access to filters and separate hatches for refilling diesel and hydraulic oil to a holder for service protocols on the mid-frame. The cab levelling function means that you...

the lifting power you need. What's more, the smart pressure and flow optimisation means that you can do several things at once, such as slew and feed, with full hydraulic power and maintain a considerably higher work rate. To this we can a full 360 degrees of cab rotation that enables you to process more from the same spot, which optimises forwarding. Another overarching new feature is the 931's new cab. The advantages include everything from improved visibility, air conditioning, lighting and floor heating to the industry's first remote control keyless system, which can control the heating...

WHEEL EQUIPMENT ALTERNATIVES (FRONT AND REAR) AND MACHINE WIDTH (A) Tyre selection Tyre selection NB: Stated dimensions are nominal and may vary slightly depending on production tolerances. WEIGHT Curb weight: 1) HYDRAULIC SYSTEM from 19,610 kg Dual-circuit load-sensing system with variable piston pumps. With 600 wheels. Flow: Pressure filter for hydrostatic circuit. Return oil filter for hydrostatic and working hydraulics. Hydraulic oil level warning. System pressure: FRAME/AXLES Axle, front: Axle, rear: Geared bogie "hi clearance" type with portal axles housed in the rims. Differential...

Felling/cutting diameter: Feed rate: Feed force, gross: Opening, front knives, max.: STEERING Hydraulic articulated joint with 2 dual-acting hydraulic cylinders. Lever steering: Load-sensing (LS) proportional steering from crane controls/rocker. Steering angle: Electrical limit damping. ELECTRICAL SYSTEM Voltage: 24 V Battery capacity: • Effective head control system. Features include multi-tree handling, sequence control, anti-slip function, bar rescue, automatic tilt at tree end, diameter-dependent clamping pressure and more. • Value-optimised or length-optimised bucking with high timber...

FORESTRY QUALITY Modern forestry demands a holistic approach. With high productivity, low operating costs and innovative technology. With good ergonomics and a long-term approach to ecology. And with a responsive combination of service and customer care. We summarise all of this as Forestry Quality – the quality required in the forest. This holistic approach permeates everything we do, and we have but a single focus: your working day. We strive to ensure that machine owners and operators always feel that their relationship with Komatsu Forest is characterised by closeness, knowledge and...