For those not familiar with Deere’s four-pot 6M, there is a quartet of short-wheelbase models, with rated power ranging from 90-120hp. There are also two models with a longer wheelbase, the 6130M and 6140M, and it’s the latter that appears here as the subject of our tractor test.
Compared with the 6120M (see profi 9/2020), the 6140M not only has an 18cm longer wheelbase but a higher bonnet under which hides the twinturbo version of the 4.5-litre, four-cylinder PowerTech engine. This PSS motor boasts an extra 20hp compared with the single-turbo EWL in the 120.
In addition to the DOC and SCR unit there is a DPF, and the viscous fan is electronically controlled to help these models become Stage V compliant. Last year’s 6120M test tractor was still Stage IV compliant.
Maximum 144hp at the shaft
At the DLG test station, the 6140M delivered 84.5kW/113.3hp of its rated 103.0kW/138.1hp to the pto. That’s OK, as the output increased to nearly 98kW/131hp when the revs dropped back to 1,700rpm, and there are still the extra ponies from the neat IPM (Intelligent Power Management) boost function. This kicks in during pto work when the 6M is travelling over 1km/hr or when hauling and tramping on at in excess of 15km/hr. Here the dyno needle stopped at just under 100kW/134hp at rated speed.
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