Komatsu's PC365LC-11 "Multifunction Plus": What the Electric Swing System Actually Changes

An excavator swinging its upper structure around to load a truck is one of the most repetitive, highest-wear motions on a jobsite, and for decades every manufacturer has solved it the same way: a hydraulic swing motor drawing straight off the main pump. Komatsu just introduced a machine that doesn't do that anymore. The new PC365LC-11, which Komatsu is calling its "multifunction plus" excavator, replaces the PC360LC-11 and PC360LCi-11 with a dedicated electric swing system backed by an ultracapacitor, and the change is a lot more consequential than a spec-sheet footnote.

Here's exactly what Komatsu changed, why it matters for cycle times and fuel burn, and who should actually be looking at this excavator.

What the PC360LC-11 Did, and Where the PC365LC-11 Picks Up

The PC360LC-11 is a conventional large excavator: 257 horsepower at 1,950 rpm, an operating weight between roughly 78,645 and 80,547 pounds depending on configuration, and a bucket range up to 2.56 cubic yards. It's a capable, well-proven machine, and Komatsu isn't discontinuing the platform's fundamentals so much as rebuilding how the swing circuit works on top of it.

The PC365LC-11 is the only excavator in its class with an electric swing system that includes "boom-up" power assist. Instead of pulling swing power from the main hydraulic pump the way the PC360LC-11 does, a dedicated electric swing motor handles that motion, and an ultracapacitor stores an extra 70 electric horsepower for instant acceleration whenever the engine is sitting at ultra-low idle. All of that electrical energy is generated during normal operation and stored in the ultracapacitor, so there's no external charging involved and nothing for an operator to plug in.

Why Taking Swing Off the Hydraulic System Actually Matters

On a conventional excavator like the PC360LC-11, every swing motion is competing with the boom, arm and bucket for the same finite hydraulic flow. During multifunction work, truck loading especially, that competition slows everything down. Komatsu's electric swing system removes that competition entirely: with swing running on its own dedicated motor, the full hydraulic pump output stays available for the boom, arm and bucket cylinders during a swing motion instead of being split between them.

Komatsu's own numbers put the result at up to a 15% increase in productivity in multifunction applications, measured against the PC360LC-11 and PC360LCi-11. The ultra-low idle state the system enables also cuts fuel consumption by up to 20%, because the engine doesn't need to stay at a higher idle speed just to keep hydraulic response sharp. For a crew loading trucks all day, that combination of faster cycles and a smaller fuel bill is the real payoff, not the ultracapacitor itself.

It's a genuinely different engineering approach than Komatsu's own HydrauMind load-sensing system, which improves how hydraulic flow is shared across functions rather than removing one function from the hydraulic circuit altogether. We've written about how HydrauMind compares to other manufacturers' smart-hydraulics approaches in our breakdown of Komatsu HydrauMind versus Hyundai's FEH system, and the PC365LC-11 is worth reading alongside that piece to see how differently Komatsu is now solving the same basic problem on two different fronts.

What Else Changed: Cab, Cameras and Attachment Control

The electric swing system is the headline, but Komatsu rebuilt three other areas on the PC365LC-11 compared to the previous model. The operator seat is now a premium heated air-suspension design with a high leather back and more adjustment range, paired with new proportional joysticks built to reduce wrist stress over a long shift. KomVision, Komatsu's bird's-eye camera system, comes standard rather than optional, giving the operator a real-time view of the machine's surroundings. And a standard tool control system lets operators store flow rates and target pressures for multiple attachments and switch between them from the in-cab monitor instead of manually adjusting settings every time a tool changes.

Komatsu also backs the electric powertrain components specifically with a 7-year, 15,000-hour transferable warranty, longer than the coverage typically attached to a conventional hydraulic swing system. That's a meaningful detail for anyone financing the machine over a 5-to-7-year term, since it directly reduces the out-of-pocket risk on the single newest, least field-proven component on the excavator.

The Rent-vs-Own Case for a Multifunction-Heavy Operation

A rental yard's large-excavator fleet is overwhelmingly built around conventional hydraulic-swing machines like the PC360LC-11, because that's what's been on the market the longest and what most yards have depreciated fully. A site-development contractor or utility installer who rents by the month to cover peak season is very unlikely to get a PC365LC-11-class electric-swing machine, which means they're also not getting the 15% productivity gain or the 20% fuel savings Komatsu is building into this generation.

For a pipeline contractor or demolition outfit running multifunction cycles (swing, dig, load, swing back) dozens of times an hour, financing a PC365LC-11 directly captures that productivity and fuel advantage over the life of the loan instead of paying rental rates for an older-generation machine. Over a 60-month term, the fuel savings alone on a machine running 1,500-plus hours a year start to offset a meaningful chunk of the payment, on top of the faster cycle times that let a crew move more material in the same shift.

Who Should Be Looking at This Excavator

Underground utility contractors, pipeline crews, and site-development operations that spend most of their day in genuine multifunction work (swinging between a trench and a truck, or between a stockpile and a hopper) are exactly who Komatsu built the PC365LC-11 for. If you're also weighing used-equipment options in this weight class, the undercarriage condition, documented maintenance history and factory grade-control technology on a used Komatsu excavator all factor into resale value the way we laid out in our guide to what actually holds resale value on a used Komatsu excavator, and the same logic will eventually apply to the PC365LC-11 once units start trading on the secondary market.

Komatsu already runs its iMC 2.0 intelligent machine control technology across excavator classes from the PC210LCi-11 up through the PC490LCi-11, and it's reasonable to expect that technology to eventually show up on an electric-swing platform like this one. We cover how that grade-automation system scales across weight classes in our comparison of the PC210LCi-11 and PC490LCi-11, which is worth a read if you're trying to understand where the PC365LC-11 fits into Komatsu's broader technology roadmap.

An electric swing system with a 7-year, 15,000-hour warranty isn't a gimmick, it's Komatsu betting that removing swing from the hydraulic circuit is the next real productivity gain left in this size class. If your crew runs enough multifunction hours to feel that difference, financing one of these makes a lot more sense than renting an older-generation machine that can't deliver it. Explore excavator financing options built for machines in this class before your next purchase decision.

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