HRB 302 D Kuhn HRB 302 D Specifications & Technical Data (2007—2026)

Simple design, totally reliable

Models of the HRB 102 D series have proven their value through their reliability, their performance and their robustness on thousands of farms already. They provide the same work quality, design and manufacturing level as top range models. The user benefits of these tools in brief: no concessions regarding quality of work, easily adjustable to adapt to variable conditions, with reduced maintenance and operating costs.

Models, which cope with most difficult situations

A long machine life is crucial for power harrows, as they have to bear many things, from extra-hard clods to big stones. On the HRB 103 D models KUHN has paid attention, because: The front of the hitch is a rectangular section tube. Lower and top links are of treated steel, all with pins stopped from rotating. On HRB 403, the headstock is connected to the gear case by a large base and completed with two stiffening arms.

Forget daily greasing!

With the reduced-maintenance drive of the rigid HR 104 and HR 1004 series models, daily greasing is a thing of the past and you can move up to greasing every 250 hours! This means: extra comfort, lower maintenance costs, through special drive shafts mounted on KUHN rigid HR 104 and HR 1004 harrows.

Foldable power harrows

KUHN foldable power harrows enable high work outputs, particularly on farms with small plots. Their folding capability makes a faster and safer travel from one field to another possible. Of robust design, the models with four to six meters are the ideal solution for farmers who are looking for a versatile and performing tool for combined seeding: front hopper and two rear coulter bars or telescopic precision seed drill with fertiliser distribution.

An evolutionary tool

To take into account the development of your needs, the HRB 103 DR and HR 1004 DR foldable power harrows can be fitted with a frame pre-equipped (3-point attachment on 4 to 5 m) to attach coulter bars combined to a front hopper. The latter calibrates and feeds the rear seeding units with seeds. On the 6 m model, the coulter bar is integrated to the roller frame for maximum load reduction on the axle. No restrictions anymore for an optimum field output!

A compact and balanced combination

Combined with a seed drill consisting of a front hopper and two rear coulter bars, KUHN foldable power harrows are part of a compact transport unit, with an optimum load distribution between the tractor front and rear axles. Changes between work and transport settings on the power harrow are quickly made thanks to two largely dimensioned cylinders.

Adapt to ground conditions

KUHN foldable power harrows can be used in rigid or floating position thanks to their centrally articulated frame. In a few minutes, the tool is adapted to the ground conditions by simply pivoting a wedge with an oblong hole.

Adjustable side deflectors

All models of the HRB 103 DR and HR 1004 DR series are equipped with side deflectors adjustable in height to best adapt the various working conditions. Articulated, they are equipped with a spring release system.

Optimum centre of gravity

The optimised design of the folding drive line provides the best possible centre of gravity and a reduced overhang. This compactness reduces the loading placed on the tractor’s lift linkage.

High capacity 3-point frame

The pivoting lower links make attachment a simple operation. At work, they enable perfect ground following. The pivoting lower links as well as the top link are of robust design and made of heat treated steel.

Track Eradicators

Available as optional equipment on all foldable power harrows as well as rigid HR 104 and HR 1004 series, they are used to loosen the ground compacted by tractor wheels. Adjustable in height, the track eradicators are equipped with traction bolt or spring safety. When working with dual wheels or very large tyres, two sets of track eradicators may be fitted on each side of the machines on the same holder.

Rear Hydraulic Linkages

The standard hydraulic linkage with its lifting capacity of 2,500 kg is appropriate for routine use with inline seed drills and is available for all power harrow series apart from the folding harrows. They can be equipped with a high capacity linkage, which lifts up to 3,300 kg. Cylinders and hinge pins are reinforced and ringed and it is as standard equipped with a hydraulic lift limiter. This linkage is recommended for hitching to high-capacity seed drills or precision seed drills. Available on all HR 104 and 1004 models.

Optional equipment HRB 102 D / HRB 103 D series

cam type cut-out clutch safety (on HRB 252 and 302 D) additional gearwheel sets semi-automatic linkage (tractor/machine) levelling bar to fit to the front or rear track eradicators with spring or traction bolt safety standard seed drill attachment or hydraulic lift attachment with two cylinders stroke limiting device for hydraulic attachment.

Optional equipment HRB 103 DR / HR 1004 DR series

front levelling bar and rear levelling bar for 4.00 m - 4.50 m - 5.00 m levelling bar for fitting to front or rear of HR 6004 DRC track eradicators with traction bolt or spring safety additional gearwheel sets additional reinforced PTO shaft on HR 4004 DRC, HR 4504 DRC and 5004 DRC standard hydraulic lift seed drill attachment with stroke limiter rear seed drill attachment with double acting hydraulic lift featuring two cylinders with stroke limiter (except HR 6004 DR) front share.

For a perfect finish

The specific shape of the side deflectors provides efficient ground guidance and channeling to ensure a good finish between passes. Guided by the roller arms on which they are fixed, they follow the roller adjustment.

Perfect soil preparation

A side deflector is responsible for perfect levelling during seed bed preparation no matter the soil type and working depth. The advantage: It is combined with a new reinforced arm. Working efficiency and quality are maintained, even if you hit a rock. For greater comfort: There are no bolts to remove when making adjustments.

Central levelling share

These models of 4.00 m and 5.00 m are standard equipped with a rear levelling share. Placed between the rollers of the two half-harrows, it ensures a good finishing over the entire working width.

Front Share

The front share crumbles the part of the soil positioned between the two troughs of the foldable models. This is particularly useful for cultivations requiring a perfect seedbed and for minimum tillage applications.

Levelling bars

The front levelling bar is used to break down and level mounds in irregular grounds. Easily removable and adjustable in height, it does not affect the blade working depth. To obtain a fine seedbed, the levelling bar can be positioned at the rear between the gear trough and the roller. If required, two levelling bars can be fitted, one to the front and one to the rear. They are available for all KUHN power harrows.

Levelling bar height adjustment

The height adjustment of the front and rear levelling bars is done with a crank handle and locked in the selected position with a pin for increased comfort in use and reliability (just the pin on HR 6004 DRC). You can easily remove them.

How to adapt to my prevailing conditions

Weather, soil, production system...there are many factors influencing the current conditions and therefore making it necessary for the power harrow to adapt. The great choice of blades, other equipment and the wide range of gears available for the Duplex gearbox will reassure you in choosing a KUHN power harrow.

Fast-fit standard blade

KUHN power harrow blades with their bevelled, twisted shape are ready to work in difficult conditions, such as in stony, hard or clayey soils, and still achieve a seedbed, where the seed feels completely comfortable. They are adapted for high working speeds.

Reliable rotor drive

Rotors are driven by large diameter gearwheels. Power transmission to the blades is ensured by numerous teeth fully engaged at all times. The rotor drive design has contributed to build the high reliability reputation of KUHN power harrows: the result of more than 30 years of experience and success.

Gearboxes for ideal adaptation to changing conditions

The aim of seedbed preparation is a fine, structured and levelled seedbed for a uniform plant development in one passage to save costs. But working conditions are as heterogeneous as soils are. In general, the soil should be worked as intensively as necessary, but as little as possible. Therefore, machines, which are adaptable in their work intensity, are the first choice for most farmers. The gearboxes are the important parts in this context.

Duplex: the most versatile on the market

Most KUHN power harrows are equipped with Duplex gearboxes. Its gearwheels can be inverted, thus offering a large range of rotor speeds to adapt the crumbling intensity. The setback power take-off reduces the angle of the drive shaft and makes it easier to lift the harrow when turning. The open-ended power take-off is standard, as on all KUHN harrows, to enable the simultaneous use of a pneumatic seed drill.

Reliable and proven blade attachment via bolts

An adequate structure whether the soil is hard or crumbly: You can achieve this thanks to interchangeable gearwheels on the Duplex gearbox. The whole drive line is protected by a friction slip clutch fitted as standard or a cam-type cut-out clutch as option. The rear PTO shaft is part of the standard equipment on all KUHN power harrows.

For difficult situations with medium power tractors

The KUHN 104 series power harrows are the result of very long experience in seedbed preparation. Longevity, reliability, lowest possible maintenance and operating costs...we have developed these machines in order that you can work in total ease. Finally the working result will also convince you: a uniformly crumbly, levelled and reconsolidated seedbed, which offers each grain the same chances to succeed.

Flexibility in seedbed preparation

As intensively as necessary, but as little as possible. Flexibility is absolutely necessary when preparing a seedbed. On the HR 104 series, you therefore have the choice between a Duplex and a Multiplex gearbox.

Duplex gearbox

Benefit from the wide range of gears for this gearbox. The open-ended power take-off is standard, as on all KUHN harrows.

Multiplex gearbox: for heterogeneous soils

With its selection lever, this gearbox is appropriate for soils requiring a frequent change of rotor speed. Two speeds with the lever and two others after inverting the gearwheels make four standard speeds. An extra set of gearwheels is available for four extra speeds. The Multiplex gearbox is standard on HR 304 M and HR 404 M.

For intensive conditions with very high power tractors

With the 1004 series, farmers, contractors and machinery rings have tools at their disposal of renowned reliability providing outstanding levels of performances. Deep or shallow soil preparation, spring or autumn work, in wet or dry conditions, they will prove their high efficiency under all circumstances.

Robust gearbox

The robust Duplex gearbox is also standard on the 1004 series power harrows. Thanks to its interchangeable gearwheels you can choose the rotor speed most appropriate for your needs.

Gearbox for the most difficult soils

The Duplex gearbox with interchangeable gearwheels enables the rotor speed to be quickly changed to suit the various working conditions. It is fitted as standard with a rear PTO stub and a cam type cut-out clutch which protects the whole drive line.

Performance in all tillage systems

Power harrows have to perform in all tillage systems and conditions. The heart of the KUHN harrows, the strong and fully protected rotor drive train, stands for itself. On the foldable models additional attention has been paid to the frame and articulations in order to provide machines that are as rigid and robust as you can expect it from KUHN machines.

Kinetics adapted to high powers

This harrow is designed for tractors of up to 265 kW or 350 hp. Following details have been adapted in order that it can work on such high power tractors:A reinforced central gearbox fitted as standard with a circulation to cool the oil. The pump is integrated in the housing forming a compact and robust unit. No sensitive component is exposed to shocks.Two side gearboxes with speed modification by changing or switching the gearwheels.Each half-harrow is protected individually with a cut-out clutch for ensuring the best possible protection.

Kuhn services

With KUHN sos order, benefit from express delivery seven days a week, 362 days a year. Thus, you can minimize machine downtime considerably and increase your work output.

Work output is a question of reliability

Have a closer look inside our power harrows to ascertain their high manufacturing level. Benefit from reduced maintenance time and costs and save more time with the FASTFIT quick-release blade system.

Casing designed to work all soil

The casing, bearings and tine holders form a compact and very robust unit, reducing twisting forces on the housing. The small distance between the casing and tine holders prevents stones from getting jammed, and the soil flow is inevitably directed completely towards the blades’ working area, ensuring that all soil is worked and a constant high level of work quality is maintained.

Optimix: exclusive shape for more effect

We recommend the OPTIMIX blades for seedbed preparation on unploughed land after stubble clearing or soil loosening, as well as for pasture reclamation. Their shape and “forward action angle” position provide two results: a greater soil loosening effect, an increased mixing of top soil and crop residues.

Quick release blade system fast-fit

The power harrows are equipped as standard (except HRB 102 D) with a quick release blade system. A full set of blades can be replaced within minutes.

Very particular shapes

The conical shaped blade housings combined with the rectangular flat section blade provide flexibility to the attachment. With this principle, the blade system can withstand very high forces.

Perfect blade hold

Blades are held in place in their holder by means of a high resistance forged steel connecting piece.

Assembly reliability

The connecting piece is locked in place using an easily accessible special clip placed inside a recess of the blade holder. An underside ring integrated in the support prevents possible damage or accidental loosening of the blade locking device.

Orientation of the blade holders

KUHN power harrow blade holders are known to be positioned in a particular order to provide a progressive crumbling of the soil by the blades. This precise and exclusive layout prevents the harrow from vibrations while simultaneously reducing power consumption.

A highly resilient design

The hitch is made from a shaped and welded steel plate, providing great strength and resistance.

Heavy-duty central frame

On the 4.00 and 5.00 m models, the central frame is made from heavy box sections, ensuring increased rigidity and high resistance to bending and torsion. For further simplicity and comfort, the HR 1004 DR models are fitted with hydraulic locking in transport position (except on HR 4004 DR).

Reinforced articulations

Each half-harrow is connected to the central frame by a heavy bushed pin, providing resistance to the highest loads.

As sturdy as can be

The HR 6004 DRC model’s central frame consists of a double front and rear structure made of heavy box sections, allowing it to accept significant bending or torsion loads.

Double pivots for more rigidity

Each wing assembly is supported by double pivots, making its chassis exceptionally rigid. This results in increased strength and a longer service life of the machine.

The key to optimum seedbeds

Optimum seedbed preparation is an imperative prerequisite for no less than good and homogeneous germination and crop development as well as vigorous young plants. The crumbling, levelling and packing work of the harrows is the key to maximize the productivity of your crops.

Blades that offer more possibilities

With seedbed preparation you pursue three major goals to get your cultivations to a good start: small clods on top, fine soil around the seed, in-depth packing, exact levelling to ensure even germination.