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The Deutz Fahr 6C Series of tractors with RV Shift version allows all speeds to be selected without the need to use the clutch pedal.
As part of the recently announced Deutz Fahr 6C Series tractors, the RV Shift version takes up an interesting position between the conventional semi-powershift models and the top-of-the-range variable TTV offers.
The three models – the 6115C, 6125C and the 6135C – push out maximum boosted horsepower of 126, 136 and 143hp, respectively. The machines also feature the SDF-designed and in-house built T5441 RVS transmission.
Alongside 20 forward and 16 reverse speeds, the RV package also offers cruise control. It also features a stop and hold function, activated by a push on the brake pedal, without the need to use the clutch.
Described as a high efficiency full powershift, the RV allows all speeds to be selected without the need to use the clutch pedal. This means there is no interruption to torque delivery, making it the ideal tractor for draft or haulage operations.
In the cabin, control is achieved via a three-way joystick located in the multi-function armrest to the right of the operator. Nudging the transmission lever forward, results in a single upwards gearshift, while holding the lever forwards means a progressive upshift through the box.
In addition, pushing the lever forwards and hitting the “confirm” button, allows the transmission to perform skip shifts and miss out several gears – a function dependent on speed and engine load. Pulling the lever rearwards, results in downshift, either singly or progressively, while moving the control lever to the left activates cruise control and memorises the current speed.
Featuring Field and Transport operating modes, switched by a single button push, default modes are set for each at the factory but can be programmed to meet individual circumstances by the operator. As an example, the operator might select speeds 5 to 8 as the best option for cultivation duties in the paddock and then use speeds 9 to 20 for transport operations.
Pre-programmed startoff speeds can also be selected to suit varying conditions. All speed selection parameters are accessed and selected through the dashboardmounted Info-Centre-Pro display.
In operation, gears can be selected manually using the joystick, but when APS (auto powershift) is activated the engine and transmission will automatically adjust engine revs and gear selection to achieve the best work efficiency and fuel economy.
For those looking for very low operating speeds, maybe for vegetable planting or harvesting, an optional creep set offers speeds from 20 metres per hour to 5km/h.
How does RV shift operate?
RV shift designed and manufactured by SDF at its Italian Treviglio base, starts out with its origins in the well proven TTV transmission.
From here, RV Shift uses virtual operating ratios to “mimic” the behaviour and characteristics of a powershift transmission. While there are a few physical differences, such as hydrostatic operating pressures, the RV shift will likely offer a lower price point than the full TTV transmission.
Meanwhile, the mechanical drive elements will optimise working efficiency, while the hydrostatic components ensure a smooth progressive shift through the gears.
Anyone who has been round baling and released a completed bale on a slope will remember the feeling of dread as the bale gathers speed and rolls off down the hillside, hopefully to be stopped by the hedgerow or the paddock levelling out.
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