John Deere swing machines are purpose-built tracked forestry carriers, the machines a logging crew uses to load logs, build forest roads, shovel-log on steep ground and carry a processing head. Each machine pairs a tracked X-frame undercarriage with a slewing (swinging) upper structure and a boom, so it can pick up, swing and place tree-length timber from a fixed position. This profile is based on AssetBase data.
The datasheet-covered range is the current G-series, made up of nine models. It runs from the 2154G and 2156G at 122 kW (164 hp) on a 6.8 L engine, through the 2654G, 2656G and 2956G, up to the 3154G, 3156G, 3754G and 3756G on a 9.0 L engine at up to 202 kW (271 hp). Across that range, net rated power runs from 122 to 202 kW (164 to 271 hp), base operating weight from about 28,000 kg to roughly 48,850 kg, and maximum reach from around 8.7 m to 13.1 m depending on configuration.
In the wider forestry category, swing machines sit alongside John Deere's wheeled and tracked harvesters, forwarders, skidders and knuckleboom loaders. They are the stationary, swing-from-the-spot end of that lineup: instead of driving timber out of the woods, they reach, lift and process it from a landing or roadside. The range below reflects the datasheet-covered G-series models.
The main takeaway: the model number tells you most of what you need. The first two digits set the size and power class, and the last two digits signal whether the machine is set up for road building and processing or for log loading.
John Deere swing machines models covered
The range is organised by size class and by working configuration. The first two digits of each model number rise with engine power and operating weight, from the 21-series at 122 kW to the 37-series at 202 kW. The last two digits separate the two main job setups: 54-series machines are the Road Builder and Processor carriers, while 56-series machines are the Log Loaders. The table below summarises each model using datasheet figures.
The main range takeaway: power and weight climb steadily through the 21, 26, 29, 31 and 37 size classes, while the 56-series log loaders reach noticeably further than the 54-series carriers in the same class.
What John Deere swing machines are used for
A swing machine works from a fixed position. The tracked undercarriage gives a stable, low-ground-pressure base on rough forest floor, and the slewing upper structure lets the boom reach out, lift and swing heavy timber through a wide arc without the machine driving back and forth. That is why a single machine can keep a landing moving while trucks come and go.
The Log Loader configurations (the 56-series models) are built to lift tree-length logs and load them onto trucks at the landing or roadside. With maximum reach up to roughly 13.1 m on the 3756G, the larger loaders can build and feed tall stacks and load trailers without repositioning. The Live-Heel versions add a heel rack that holds and steadies long stems during handling.
The Road Builder and Processor configurations (the 54-series models) are carriers. As Road Builders they shovel-log and build or maintain forest haul roads, using the boom to move soil, slash and logs on steep or soft ground. As Processors they carry a harvester or processing head, such as a Waratah, to fell, delimb and cut timber to length from a fixed swing position.
Across the range, net power runs from 122 to 202 kW (164 to 271 hp) and base operating weight from about 28,000 kg to roughly 48,850 kg, so crews can match machine size to stand size, terrain and the volume of timber moving through the landing.
Model families, variants and configurations explained
John Deere swing machine model numbers combine a size class with a configuration code, and each machine is then ordered in a specific working setup. For an operator, buyer or fleet manager, those codes are the practical guide to what the machine is for: the size digits set power and weight, and the configuration sets whether it loads logs, builds roads or carries a processing head.
The main operational difference: size class sets the power and weight, while the configuration code decides the job, so a 2654G and a 2656G share an engine but are set up for very different work.
Key specification signals
For comparing swing machines, the most useful signals are net rated power, operating weight, maximum reach and swing torque, plus the working configuration. Power and weight set the size class and the kind of timber the machine can handle; reach sets how far it can load or process without repositioning; swing torque indicates how much rotating force the upper structure can apply when moving heavy logs.
Because the range spans a 122 kW carrier up to a 202 kW loader, and because reach and weight vary with the chosen configuration and undercarriage, the figures below use datasheet values for each model in a representative base setup. Configuration-dependent values are marked rather than estimated.
The practical takeaway: power, swing torque and weight rise together through the size classes, so reading them as a set places any G-series swing machine in its duty class more reliably than the badge alone. A more detailed technical profile is available in AssetBase.
Energy use and lifecycle CO₂ context
John Deere swing machines in this range are diesel-powered, using 6.8 L or 9.0 L PowerTech engines, so operational emissions are driven by fuel burn. Fuel use depends on engine size and how hard the machine works: a 202 kW 3756G loading continuously at a busy landing uses far more fuel per year than a 122 kW 2154G on intermittent road-building duties, so usage assumptions matter as much as the engine rating. The G-series half-lever hydraulic control reduces fuel consumption by roughly three to five percent compared with the previous D-series, depending on application.
It helps to separate operational energy from total lifecycle CO₂. Annual fuel use is the operational part, but the broader footprint also includes manufacturing, the engine and hydraulic system, transport, maintenance and end-of-life treatment. EmissionBase® helps separate operational energy from broader lifecycle CO₂ assumptions such as production, battery or engine system, transport, maintenance and end-of-life treatment.
For fleet and finance teams, this separation is what makes machines comparable: two swing machines with similar engines can have very different lifecycle profiles once usage intensity, configuration and downstream factors are included.
How John Deere swing machines fit into wider forestry coverage
Swing machines are one part of John Deere's wider forestry range. The same timber moves through adjacent machines: tracked and wheeled harvesters fell and process standing trees, forwarders and skidders move logs out of the stand, and knuckleboom loaders handle timber at the roadside. The swing machine is the stationary, swing-from-the-spot option within that lineup, working a landing or building a road rather than travelling with the load.
Across the market, John Deere competes with purpose-built forestry carriers and log loaders from other makes, and buyers often weigh a swing machine against a tracked harvester or a knuckleboom loader for a given task. Reading the subcategory in context helps fleet and finance teams compare like-for-like duty classes rather than model names.
In short, John Deere swing machines sit at the stationary, swing-from-the-spot end of a broad forestry range, acting as the go-to option for loading, road building and processing at the landing.
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