| Machine | Ponsse Ergo (forestry harvester) |
|---|---|
| Engine | Mercedes OM936LA, 6-cyl., 286 hp stock |
| Solution | Stage 1 |
The situation
A harvester earns its money per cubic metre, and on steep ground with heavy stems the engine is what sets the pace. The Ponsse Ergo runs a Mercedes OM936LA six-cylinder, a dependable engine with reserve that the factory calibration does not fully use. The contractor wanted more power for the crane and the drive when the terrain and the timber get demanding, without touching the hardware and without giving up the reliability the machine is known for.
What we did
The file was developed for this machine as a software-only Stage 1: the engine maps were adjusted, no hardware was changed.
- Stage 1: 286 → 345 hp, a gain of 59 hp or around 20 percent. Fuel delivery, boost and the related parameters were adjusted within the limits of the stock components so that the extra output is available across the working rpm range, not only at the top end.
- Efficiency: the calibration is set up so that consumption stays level or improves at the same work rate – the machine does the same job with less effort rather than simply burning more fuel.
The engine remains within its protective limits; the gain comes from using the reserve the OM936LA already has.
The result
+59 hp and noticeably more pull when the crane is loaded and the machine is climbing. For the contractor this means less time per stem under difficult conditions, more wood moved per shift and a harvester that does not run out of breath on the last hour of the day. Because the change is purely in software, servicing and robustness of the Ergo stay as they were.
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* Emission-related solutions (DPF, EGR, AdBlue/SCR) are intended for off-road, agricultural, export and motorsport use only, where permitted by local law. The operator is responsible for legal use in their market.
