Siena K6.30 | K6.40 RS

Isodiametric tractors, monodirectional, with steering wheels. 25 or 36 HP

The Siena K6.30 | K6.40 RS tractors are the best answer to the requirements of the hobby-farmer and the farmer specialising in farming in glasshouses, nurseries, micro-row crops and poultry farming.

Compactness, maneuverability and limited weight allow the Siena K6.30 | K6.40 RS to work in complete safety both on flat and uneven, sloping grounds.

The double ellipsoidal lights integrated in the bonnet give the tractor a particularly refined look.

Two Kubota engines are available for the Siena: a 25.2 HP three cylinder engine (Siena K6.30) and a 35.6 HP four cylinder engine (Siena K6.40), both with indirect injection and natural aspiration.

More Information


Model Power KW/HP Nominal speed (rpm) No. of cylinders Displacement (cm3) Aspiration Maximum torque (Nm/rpm)
Siena K30 19.1 / 26 3000 3 1123 Natural 70.4 / 2200
Siena K40 26.2 / 35.6 3000 4 1498 Natural 96.5 / 2200

Transmission and gearbox

The transmission of Siena K30 | K40 is fitted with the OS-FRAME chassis. A joint in the middle of the machine lets the front axle oscillate up to 15° with respect to the rear axle, for excellent stability on slopes and maximum traction.

The easy connection gearbox has 8 forward and 4 reverse speeds, without speed overlapping.

The dry single disc clutch grants gentle and immediate gear connection.

The distribution of the weights on the axles, 40% on the rear and 60% on the front, is proved optimal once the rear lifting equipment is mounted. The rear load optimises the sharing of the weights on the two tractor axles to increase stability and safety.

The permanent 4-wheel drive allows exploiting the machine’s towing feature.

Pto and hydraulic system

The rear mechanical control power take-off is at 540 rpm, synchronised with the gearbox

As an optional, Siena K6.40 RS can be equipped with 540 rpm PTO independent from the gearbox and synchronized with all progress speeds.

The rear hydraulic lift by rams is set up with a cat. 1 three point connection, complete with stabilisers to restrict the equipment spinning laterally.

The hydraulic system provides high performance, with a 16 l/min and 125 bar running pressure.

Active and passive safety

The efficient service brakes, drum type acting on the front wheels, guarantee modular and completely safe braking.

Front and rear differential lock, mechanically controlled, allows the tractor to be always in traction.

The roll-bar and the safety belts on the seat protect the operator.

Driving position

The driving position is custom-fitted on the driver with ergonomic controls placed to be easily found and activated by the operator.

The gear levers are positioned beneath the dashboard for maximum driving position accessibility.

The hydrostatic steering ensures maximum maneuverability and low turning radii.