10 Most Powerful Track Based Feller Bunchers Ever Built

Some of these machines spin a steel saw disc over 5 feet wide at more than 1,000 RPM, and they're not even the scariest part. Today we're ranking the 10 most powerful tracked feller bunchers ever built. One weighs over 84,000 pounds. One pulls with more than 100,000 pounds of force. One tilts its entire cab 26 degrees to stay level on a mountainside. And number one is one of the newest machines in the forest. Number 10 starts now. Number 10. Tigercat LX 870C. We start with a legend. Before Tigercat's newest machines took over, the 870C family was one of the heavy hitters in the woods, and the LX 870C was its toughest version. Under the hood sits a Cummins QSL9 diesel, rated at 300 gross horsepower at 1800 RPM, and almost all of that power goes into hydraulic pumps that drive the tracks, the boom, and the saw. And this thing is heavy. Without a felling head attached, the LX-870C weighs about 77,000 pounds. That's roughly 35 tons of steel before you even bolt on the saw. So why does it need all that weight? Balance. A feller buncher grabs whole trees, cuts them at the base, and swings them into piles. The heavier the base, the bigger the tree it can hold out at the end of its boom without tipping. The numbers back that up. The LX870C is listed with a bare pin lift of about 17,300 pounds at maximum reach, and a maximum cutting radius of nearly 28 feet. Now look at the cab. In Tigercat's naming, the L stands for leveling. The whole upper machine can tilt to stay level, while the tracks sit on a slope. The LX870C levels up to 20 degrees forward, 7 degrees to the rear, and 15 degrees side to side. That matters because an operator might sit in this seat for a full shift. On steep ground, a leveling cab keeps the operator upright instead of hanging sideways all day. It also keeps the machine's center of gravity where it should be. It also carries about 256 gallons of diesel, which is around 970 liters. That's enough to keep it cutting through long shifts without constant refueling. The standard 870C, without leveling, was listed at 66,870 pounds with 73,000 pounds of tractive effort. The leveling version added roughly 10,000 pounds of extra steel. Used 870C machines are still being bought and sold today, many of them with tens of thousands of hours on the clock. That tells you how tough this platform was. But on this list, 300 horsepower only gets you 10th place. Number 9, Caterpillar 552 Series 2. Number 9 only beats number 10 by 3 horsepower. But wait until you hear how hard it pulls. This is the Caterpillar 552 Series 2. It runs a Cat C9 ACERT engine and 8.8 liter diesel, making 303 gross horsepower at 1,800 RPM. It's even heavier than the Tiger Cat. With the standard felling linkage and no head, Cat lists it at 78,960 pounds. Choose the long-felling linkage and it climbs to 79,639 pounds. But here's the number that puts it on this list. The 552 Series 2 delivers up to 104,000 pounds of tractive effort. That's the pulling force its tracks can put into the ground. Think about it this way. That's more than the machine's own weight, pushing it up hills and through mud. CAT credits its proven final drives and travel motors for that traction. When the ground turns to slop or the slope gets steep, This machine just keeps crawling. Then there's the tilt system. Cat says the 552 Series II uses a patented three-cylinder tilt mechanism, and it can tilt forward and side to side at the same time. It's built as a leveling machine for clear-cut or select-cut work in rough terrain. It also has serious clearance underneath. Trade press coverage of the Series 2 machines reported a full 35 inches of ground clearance between the tracks, from front to back. That means less chance of getting hung up on a stump or a rock. Fuel? The tank holds 312 gallons, which is about 1181 liters. The hydraulic system holds almost 98 gallons of oil by itself. And CAT thought about cooling too. Its Econ control system automatically adjusts the blade angle of a FlexAir fan. When the machine doesn't need full cooling, the fan takes less horsepower, and that saves fuel. With a standard boom, the 552 Series 2 reaches about 28 feet. The long-reach version stretches to around 32.5 feet. Big weight, huge pulling power, and a clever tilt. But eight machines on this list still have more horsepower. Number 8. John Deere 953M. Now we jump past 300 horsepower, and John Deere enters the fight. This is the 953M tracked Feller Buncher. It runs a John Deere PowerTech Plus 6090 engine, a 9.0 liter diesel making 330 horsepower at 1900 RPM with 1027 pound-feet of torque. That's 27 more horsepower than the CAT we just saw, and Deere packs it into a lighter machine. The 953M has an operating weight of 72,970 pounds, about 33 tons, but the stat that really stands out is swing torque, 81,260 pound-feet. Swing torque is the twisting force that rotates the whole upper machine. More of it means the 953M can whip a heavy bundle of trees around quickly, even uphill, and it can reach, with the reference FR24B felling head, Deere lists a maximum boom reach of 29 feet 1 inch and a felling diameter of 24.5 inches. At full reach, it's rated to lift about 17,570 pounds. Here's a design detail that matters a lot in the woods. When Deere moved from its J-Series to the K-Series, it increased the cutting swath by 30% from about 10 feet to 13 feet with the standard boom. The M series kept that improvement. Why is that a big deal? A wider swath means the machine cuts more trees from one spot before it has to move. Less moving means less fuel burned and more wood on the ground every hour. The 953M also has a lower profile than its big brother. It stands 11 feet 8 inches over the cab with 30 inches of ground clearance underneath. Its fuel tank holds 285 about 1,080 liters. Its tracks put down 72,300 pounds of tractive effort, and it can travel at up to 2.6 miles per hour. Deere also builds in the technology. JDLink Telematics is now included on the base machine, which lets dealers monitor machine health remotely and spot problems before they cause downtime. 330 horsepower is a big step up. But hold on, because Deere has an even heavier machine coming later in this countdown. 7. TigerCat LX870D Remember the LX870C from number 10? This is what happened when TigerCat rebuilt it. The LX870D dropped the Cummins and switched to a TigerCat FPT-C87 engine, meeting Tier 4 final emissions. It's rated at 330 horsepower at 1950 RPM. That's 30 more horsepower than the machine that opened this list. Without a felling head, it weighs 33,565 kilograms, about 74,000 pounds. It's a little lighter than the LX-870C, but it hits much harder. Now look at how Tigercat moves this thing. The LX870D uses two closed-loop piston pumps, one for each track. Each track is driven by its own axial piston motor with infinitely variable speed. In simple terms, each track gets its own dedicated hydraulic circuit, so the operator gets smooth, precise control of travel even on rough ground. In Tigercat's naming, that's what the X points to, the closed-loop track drive. And it doesn't stop there. The LX870D has separate piston pumps for the main hydraulics, the saw, the cooling fan, and the clamp and accumulator arms. Every big job on the machine gets its own pump. Its fuel tank holds 1,085 liters, that's 287 US gallons. There's also a 135-liter tank for diesel exhaust fluid, which the Tier 4 final engine needs to clean its exhaust. Underneath, it rides on heavy FH400 track chain with an 8.5-inch pitch. And it sits with 710 millimeters, about 28 inches, of ground clearance. Tiger Cat also took dust seriously. The fan is hydraulically driven with automatic variable speed and a reversing cycle. It automatically reverses to purge dust and debris from the cooling system. In a forest full of sawdust and leaves, that's a big deal. The main hydraulics are protected by five spin-on filters rated at 7 microns plus one water-absorbing filter. Clean oil means longer pump life. Tigercat has filmed LX870D machines working steep, varied terrain in Washington state, both with and without cable-assist logging systems. 330 horsepower, closed-loop drive, and a leveling cab. But the next Deere is even heavier. Number 6. John Deere 959M I told you Deere had a bigger one. Meet the 959M. On paper, the engine looks familiar. The same Powertech Plus 6090 diesel as the 953M, making 330 horsepower at 1900 RPM and 1027 pound-feet of torque. But look at the weight. The 959M has an operating weight of 83,260 pounds. That's 37,760 kilograms, more than 10,000 pounds heavier than the 953M. All that extra mass goes into one thing, stability on steep ground. The 959M is a leveling machine, and Deere says it has a best-in-class forward tilt. The cab can tilt 26 degrees forward, 14 degrees to the rear, and 7 degrees to each side. Why does forward tilt matter so much? When a buncher works downhill... The front of the tracks drops. Without leveling, the operator would be staring at the ground and the machine's center of gravity would shift forward. With 26 degrees of tilt, the upper machine stays level while the tracks follow the slope, and it pulls even harder than the 953M. The 959M puts down 83,880 pounds of tractive effort. That's 373 kilonewtons. Swing torque is the same massive 81,260 pound-feet. It's also tall. The 959M stands 13 feet 3 inches over the cab, with 29 inches of ground clearance, and its tracks have 12.5 feet of length on the ground. Fuel, 285 gallons, about 1,080 liters. And because a machine like this runs lights, controls, fans, and electronics all day, Deere gives it two 100-amp alternators. Now for the history. Deere's older J-Series 909J and 959J Feller Bunchers were powered by a John Deere 6081H engine, making 294 maximum horsepower. The 959M brings 330. That's 36 more horsepower than the 959J. At full reach, the 959M is rated to lift about 17,570 pounds, and its maximum boom reach is about 29 feet. Deere also offers an optional rapid-cycle system, which lets operators tune how fast the machine responds based on their skill level. But at number five, a Komatsu squeezes out just one more horsepower. Number five, Komatsu XT465L-5. One horsepower. That's all that separates number six from number five, but this Komatsu has a story behind that number. The XT465L-5 is the biggest of Komatsu's XT-5 tracked feller bunchers. A family that also includes the XT430-5 and XT445L-5. The lineup was first introduced in 2018. When it launched, the engine, a Cummins QSL-9, made 310 peak horsepower. Then Komatsu went back to work. In its upgrade of the XT-5 lineup, it boosted the engine to 331 horsepower, a 7% jump. And here's the crazy part. Komatsu says the machines also use up to 5% less fuel. Notice where that power arrives. 331 horsepower at just 1,600 RPM. Peak power at low engine speed means the machine can pull hard without screaming. The XT465L-5 weighs 74,516 pounds, or 33,800 kilograms, and delivers 75,799 pounds of tractive effort. Its swing torque is 58,341 pound-feet. The upgrade didn't stop at the engine. Komatsu increased hydraulic flow, and it made the XT-445L-5 and 465L-5 25% faster on the move, up to 5.3 km per hour. It also added 13 LED lights to help operators see the right track and use the rear camera at night. The L in the name means leveling. This model uses a heavy-duty two-cylinder, four-way leveling system, and it lifts. Komatsu increased lift capacity at full reach. And the XT465L-5 can readily run Quadco's 24-inch disc sawheads. A Komatsu dealer says that's 24% more lift at full reach than the XT430-5 and 445L-5. Komatsu also rethought the cab. It moved it to the left side of the boom, giving the operator a clearer view of each track. For mechanics, there's a gull-wing engine hood that folds down into an elevated work platform. And the hydraulic system uses two tanks that together need 55% less hydraulic oil. Even the undercarriage got tougher, with stronger track chain links and triple labyrinth seal housings that protect the final drives from packed mud. So that's 331 horsepower. Now the top four all hit the same number, 350. Number 4. John Deere 859M Forget the idea that a powerful forestry machine needs to be enormous. The John Deere 859M proves that smart engineering, serious traction, and a well-designed boom can make a tracked feller buncher a formidable tool in the woods. Under the hood, the 859M uses John Deere's Powertech PSS 9.0-liter six-cylinder diesel engine. In its dedicated travel configuration, peak power reaches 330 horsepower at 1,900 RPM, giving the machine plenty of muscle for demanding forestry operations. But horsepower tells only part of the story. The 859M delivers approximately 83,876 pounds of tractive effort in its dedicated travel configuration. That pulling force helps it navigate difficult ground, including muddy logging sites and challenging slopes. The machine also has an impressive working reach. John Deere lists a maximum boom reach of 27 feet 10 inches, allowing operators to cut trees without constantly repositioning the tracks. Its leveling cab can tilt 26 degrees forward, 7 degrees backward, and 14 degrees to either side, helping the operator maintain a comfortable working position on uneven terrain. Then there's the hydraulic system. Dedicated pumps supply different machine functions, helping the operator manage travel, boom movement, and cutting operations efficiently. The 859M can also use John Deere's felling head options for different timber sizes and harvesting conditions. With an approximate base machine weight of 79,510 pounds, this is no lightweight forestry machine. It's built to deliver dependable performance where traction and stability matter most. The 859M combines substantial pulling power, a practical working reach, and serious forestry engineering. And the next machine brings a different approach to high-production tree cutting. Number three, TigerCat 855E. When logging crews need to cut large numbers of trees without wasting time moving between every single trunk, the TigerCat 855E is built for exactly that kind of work. This tracked feller buncher combines a heavy-duty forestry design with boom technology intended to improve productivity throughout a working shift. The 855E belongs to Tigercat's established E-Series family. According to the manufacturer, it is suitable for high-volume applications ranging from fast-cycle plantations to mixed-diameter timber stands. That versatility makes it useful in forests where tree sizes and working conditions can change considerably. One of its most interesting features is Tigercat's patented ER boom technology. Rather than requiring the operator to coordinate every boom movement independently, The system allows the boom to extend and retract along a horizontal plane using a single joystick. This can make positioning the felling head easier and reduce unnecessary movements. The benefits go beyond convenience. TigerCat explains that ER technology transfers energy between boom functions, reducing the power and hydraulic flow needed for certain movements. That can help reduce fuel consumption per unit of production while improving operating efficiency. The 855E can work with different attachments, including disc saw and shear felling heads. For mature timber, TigerCat offers the 5702 felling saw, while the larger 5185 fixed felling saw is intended for oversized timber and demanding applications. Operators also benefit from a full-length front window, carefully positioned controls, a touchscreen display, and a climate-controlled suspension seat. An automatic reversing cooling fan helps clear debris from the cooling system. The leveling L855E version is particularly suited to steep slopes, thanks to its specialized undercarriage. The 855E shows that productivity comes from more than engine power alone. In forestry, efficient boom movement, suitable attachments, and operator control can make a major difference. Number 2. Komatsu TimberPro TL755D Remember the TimberPro at number 4? This is its mountain climbing brother. The TL755D uses the same cooled EGR Cummins L9 diesel, making 350 peak horsepower. But Komatsu says this one is specifically designed for steep slope logging. To get there, it bulked up. The TL-755D weighs 76,670 pounds, or 34,850 kilograms. That's nearly 5,000 pounds more than the TN-755D, and about 2,000 pounds more than the Tigercat X-877. The big difference is leveling. The TL-755D comes standard with a heavy-duty leveling system that Komatsu calls the RevoFrame. Komatsu also gives it a wider stance for stability, and it pulls with up to 103,583 pounds of tractive effort. That's 46,984 kilograms of force, almost 104,000 pounds of push, helping a 38-ton machine claw its way up steep ground. But here's the feature that tells you exactly what this machine was built for, tethering hitches. On very steep slopes, some logging crews use winch assist, or tethered, logging. A cable runs from the machine to an anchor, often a winch machine, up the hill. The cable helps the feller buncher hold its position and gain traction where tracks alone would struggle. The TL-755D can come with tethering hitches installed at the factory and integrated into the car body. Instead of welding something on later, the anchor point is built right into the heart of the machine. And like the TL755D, it has a tight tail swing for maneuverability and clearance, plus big lift capacity. Up to 14,900 pounds at 20 feet. Komatsu sums up the goal as high-volume felling in difficult terrain with consistent productivity. Basically, this is a machine built to keep working where most others would have to stop. Heavy, leveling, tether-ready, and 350 horsepower. It's an absolute beast. But one machine is heavier still, by almost 8,000 pounds. Number 1. John Deere 903M At number 1, we're looking at a machine designed for demanding forestry work, Traction and efficient tree handling can make the difference between a productive day and a frustrating one. Meet the John Deere 903M Tracked Feller Buncher. Unlike the smaller machines in Deere's 800M family, the 903M belongs to the larger 900M series. Its design focuses on giving logging crews a substantial working envelope and the ability to handle demanding harvesting conditions. The 903M uses a John Deere PowerTech 9.0-liter diesel engine, producing up to 330 horsepower at 1,900 RPM. That power supports the hydraulic functions required to drive the tracks, swing the upper structure, move the boom, and operate the felling head. One of its standout features is its extended working reach. John Deere lists a maximum boom reach of approximately 32 feet 3 inches, giving the operator a wider working area before the machine needs to reposition. That can help reduce unnecessary travel between cuts and improve efficiency during suitable harvesting operations. The rotating upper structure also matters. A feller buncher must move its boom and accumulated trees into the right position, without losing valuable time. Smooth, controlled movement helps operators maintain a steady cutting rhythm. Underneath, the tracked undercarriage provides stability and traction on rough forestry ground. Its wide working stance and heavy-duty construction are intended to handle the demands of professional timber harvesting. The 903M can be equipped with different felling attachments depending on the trees in operation. This flexibility allows logging crews to configure the machine for their particular working conditions rather than relying on one setup for every forest. The result is a This is a serious forestry machine built around reach, controlled handling, and productive tree cutting. The John Deere 903M demonstrates why modern feller bunchers are more than simply powerful engines on tracks. Their real strength comes from combining hydraulic performance, working reach, and the ability to keep harvesting efficiently. Which one would you want to run for a full shift? Tell me in the comments. 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