In buying a Kuhn machine you have chosen wisely. Into it have gone years of thought, research and
improvement. You will find, as have thousands of owners all over the world, that you have the best that
engineering skill and actual field testing can produce. You have purchased a dependable machine, but only
through proper care and operation can you expect to receive the performance and long service built into it.
This manual contains all the necessary information for you to receive full efficiency from your machine. The
performance you get from this machine is largely dependent on how well you read and understand th is manual
and apply this knowledge. Please DO NOT ASSUME YOU KNOW HOW TO OPERATE AND MAINTAIN YOUR
MACHINE before reading this manual carefully. KEEP THIS MANUAL AVAILABLE FOR REFERENCE. Pass
it on to the next owner if you re-sell the machine.
Your KUHN dealer can offer a complete line of genuine KUHN service parts. These parts ar e manufactured and
carefully inspected in the same factory that builds the machine to assure high quality and accurate fitting of any
necessary replacements.
About improvements
We are continually striving to improve our products. It therefore reserves the right to make improvements or
changes when it becomes practical to do so, without incurring any obligations to make changes or additions to
the equipment sold previously.
Designated use of the machine
HRB353D / HRB403D power harrows must only be used for work for which they have been design ed: Seedbed
preparation on ploughed ground or in min-tilled grou nd with or without simultaneous seeding.
Document illustrations
The illustrations in this manual may be based on one typ e of machine only. However, all instructions apply to all
machines covered in this manual.
Please write below the type and serial number of the
machine. This information is to be indicated to the dealer
for all spare parts orders.
HRB353D
Power harrows
HRB353D - 403D
HRB403D
Type: HRB353D / HRB403D
Serial no.:
Identification of the machine
5
4.Optional equipment
Tick box corresponding to the equipment fitted on your
machine:
HRB353D and HRB403D
Kit no. 1237420 : Set of gearwheels (19 and 26 teeth matching gears).
Kit no. 1237650 : Set of gearwheels (17 and 28 teeth matching gears).
Kit no. 1246020 : Standard linkage.
Kit no. 1246030 : Hydraulic lift linkage.
Kit no. 1246040 : Hydraulic lift linkage stroke limiters.
Kit no. 1239140 : High capacity hydraulic lift linkage.
Power harrows
HRB353D - 403D
Kit no. 1216610 : 2 track eradicators with traction bolt overload mechanism.
Kit no. 1216620 : 2 track eradicators with spring overload mechanism.
Kit no. 1286369 : Adaptation parts for VENTA LC.
Kit no. 1286269 : Floating adaptation parts for adaptation of VENTA AL and VENTA TI roller.
Kit no. 1286081 : Rigid adaptation parts for adaptation of VENTA AL and VENTA TI.
Kit no. 1616359: Floating adaptation parts for INTEGRA roller (Packer PK2 roller and Maxipacker roller).
Kit no. 1616373 : Rigid adaptation parts for INTEGRA.
6
Identification of the machine
HRB353D
Kit no. 1238840: Track eradicator mounting yokes.
Kit no. 1238670: Front or rear levelling bar.
Kit no. 1237310: Semi-automatic front linkage category 2.
Kit no. 1237320: Semi-automatic front linkage category 3.
HRB403D
Kit no. 1238850: Track eradicator mounting yokes.
Kit no. 1238680: Front or rear levelling bar.
Kit no. 1237950: Semi-automatic front linkage category 2.
Power harrows
HRB353D - 403D
Kit no. 1237960: Semi-automatic front linkage category 3.
Identification of the machine
7
$Safety
1.Description of symbols used in this
document
This symbol indicates a potentially hazardous situation
that if not avoided, could result in serious bodily injury.
Power harrows
HRB353D - 403D
This symbol is used to identify special instructions or
procedures which, if not followed strictly, could result in
machinery damage.
This symbol is used to communicate technical
information of particular interest.
8
Safety
Power harrows
HRB353D - 403D
2.Safety instructions
Introduction
The machine must only be operated, maintained and repaired by competent persons who are familiar with
machines' specifications and operation and aware of safety regulations fo r preventing accidents.
The operator must imperatively respect safety instructions in this manual and in the warnings posted on the
machine. The operator is also obliged to respect current le gislation concerning accident prevention, wo rk safety
and public traffic circulation.
Designated use of the machine also means following operation, maintenance and repair recommendations
given by the manufacturer, and using only genuine spare parts, equipment a nd acce sso ries, as r ecom mended
by the manufacturer.
The manufacturer is not held liable for any damage resulting from machine applications other than those
specified by the manufacturer. Any use other than the designated operation is at the risk and responsibility of
the operator.
The manufacturer is not held liable for any damage or accident re sulting from machine modifications carried out
by the operator himself or by a third party without previous written agreement from the manufacturer.
Read and follow the safety instructions
Before using the machine, carefully read all the safety
instructions in this manual and the warnings placed on
the machine.
Before starting work, the operator must be familiar with
all machine controls, handling devices and their
functions. It is too late to learn once work has been
started!
Never let anyone operate the machine who is not traine d
to do so.
Should you have any difficulties in understanding certain
parts in this manual, please contact your KUHN dealer.
Precautions to be taken before carrying out
any operations on the machine
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key and
wait until all moving parts have come to a complete stop
and apply park brake.
Safety
9
Precautions to take before using the
machine
Do not wear loose clothing which could become caught
up in moving parts.
Wear the appropriate protective clothing for the work in
hand (gloves, shoes, goggles, helmet, ear defenders,
etc.).
Ensure that all operating controls (ropes, cables, rods,
etc) are placed so as they cannot be operated
unintentionally and cause damage or injury.
Before operating the machine, check tightness of nuts
and bolts, particularly on fixing elements (tines, forks,
blades, knives, etc). Retighten if necessary.
Before operating the machine, ensure that all the safety
guards are firmly in place and in good condition.
Immediately replace any worn or damaged guard.
Power harrows
HRB353D - 403D
Precautions when driving
Tractor handling, stability, performance and braking
efficiency are all affected by weight distribution, trailed or
mounted implements, additional ballast and driving
conditions. It is therefore of great importance that the
operator exercises caution in every given situation.
Groundspeed must be adapted to ground conditions as
well as to roads and paths. Always avoid abrupt change s
of direction.
Be particularly cautious when turning corners, paying
attention to machine overhang, length, height and
weight.
Never use a narrow track tractor on very uneven or
steeply sloping ground.
Never leave the tractor seat while the machine is
operating.
Carrying people or animals on the machine when
working or in transport is strictly forbidden.
10
Safety
Precautions when driving on public roads
Dimensions
Depending on the dimensions of the machine, contact
the relevant authorities to ensure that it can be legally
transported on public roads.
If the machine is over the maximum legal size, follow the
local regulations for special transportation of oversize
equipment.
Gross weight and weight per axle
Check that the tractor's authorized gross weigh t as well
as its lift capacity and maximum weight per axle are not
exceeded.
If necessary, add ballast weights to the front or to the
rear to preserve the steering and braking efficiency.
The front axle load (1) must never, under any
circumstances, be less than 20% of the tractor's unladen
weight.
Power harrows
HRB353D - 403D
Transport position
Before transporting the machine on public roads, place
the machine into its transport position, according to the
instructions in this manual.
Lights and indicators.
Before transporting the machine on public road s, ensure
that all legally required lightings and signallings are in
place.
Ensure that lightings and signallings are clean and in
good working order. Replace any missing or broken
equipment.
Always obey current regulations for driving
on roads.
Maximum speed
Always keep to the legal speed limit for driving a tractormachine assembly on public roads.
Precautions when coupling
Before attaching the machine, make sure that it cannot
accidentally start moving (chock the wheels) and that the
parking stand is in the right position.
The machine must only be attached to the hitch points
Safety
11
provided for this purpose.
Never stand between the tractor and the machine when
operating the three point linkage.
Do not stand between the tractor and the machine
without ensuring that the parking brake is applied.
PTO shaft
Use only PTO shafts supplied with the machine or
recommended by the manufacturer.
The protective shield of the tractor PTO stub, the PTO
shaft guards and the protective covering of the machine
input shaft must always be in place and in good
condition.
Make sure that the PTO shaft guards are secured with
the safety chains provided.
Any worn or damaged guards must be replaced
immediately. A worn guard or an unpro tecte d PTO shaft
can cause a serious or even a lethal accident.
Do not wear loose clothing that could be caught in the
rotating PTO shaft.
Before attaching or removing a PTO shaft, or before
doing any work on the machine, disengage the PTO
drive, turn off the engine, remove ignition key and wait
for all moving parts have come to a complete stop.
If the primary PTO shaft is equipped with a slip clutch or
a free wheel, these must be fitted on the machine side.
Ensure that the PTO shaft is always correctly fitted and
locked into place.
Before connecting the PTO shaft, ensure that the PTO
speed (rotational frequency) and directions of rotation
are in line with manufacturer's recommendat ion s.
Before engaging the PTO drive, make sure all people
and animals are clear from the machine. Never engage
the PTO drive when the tractor engine is stopped.
When uncoupling the machine, rest the PTO shaft on the
support specially provided, and replace protective cover
on the PTO stub of the tractor.
Read and follow the instructions in the operator's manual
provided with the PTO shaft.
Power harrows
HRB353D - 403D
Precautions during manoeuvres
When moving the machine from the transport positio n to
the working position and vice versa, make sure that
nobody is within the machine pivoting area.
12
Safety
Remote controlled components
Danger of crushing and shearing can exist when
components are operated by hydraulic or pneumatic
controls. Keep away from these danger zones.
Safety decals
Safety warning decals are placed in pictorial form on
various parts of the machine. They are there to warn you
of potential dangers and to tell you how to avoid
accidents. Always keep the safety decals clean and
readable, and replace them when they are worn,
damaged, missing or illegible.
Power harrows
HRB353D - 403D
Safety
13
Waste disposal
Respect the environment! Never spill pollutants (oil,
grease, filters, etc.) on the ground, never pour them
down the drain and never discard them in any other
place where they could pollute the environment. Never
throw away or burn a tyre. Always take waste to
specialized recycling or waste disposal centers.
Precautions for maintenance and repair
work
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key and
wait until all moving parts have come to a complete stop
and apply park brake.
Rest the machine on the gr ound, release the pressure
from the hydraulic circuit and leave the machine to cool
down.
Make sure that the parts of the machine that need to be
lifted for maintenance or repair work are firmly propped
up.
Before any work is done on the electric circuit or before
any electric welding is carried out on the attached
machine, disconnect the machine from the tractor
electrical circuit. Also disconnect alternator and battery
terminals.
Repairs on elements under pressure or tension (springs,
pressure accumulators, etc.) must only be carried out by
competent persons with regulation equipment.
Wear the appropriate protective clothing for the work in
hand (gloves, shoes, goggles, helmet, ear defenders,
etc.).
Do not solder, weld or use a blow torch near fluids under
pressure or inflammable products.
For your own safety and for correct machine operation,
only use original manufacturer parts.
Power harrows
HRB353D - 403D
14
Safety
Projection of stones and foreign objects
For driver safety, always use a tractor equipped with a
cab. Never start the machine when there are people
nearby. Even when the machine is used in accordance
with its purpose, objects may be projected. Stones and
other foreign objects projected by the moving parts can
travel a considerable distance. Keep all persons and
animals away from the danger zone.
Precautions for machine use
Power harrows
HRB353D - 403D
After each use, check the tools (blades) and their
attachment hardware in accordance with the instructions
given in the present manual.
Check the guards regularly. Immediately replace any
damaged or missing elements.
Make sure all the guards are in place. Ke ep all persons
and animals away from the danger zone.
Stay a safe distance from the machine when the cutting
tools are in movement.
Never work in reverse.
After disengaging the PTO drive, tools can continue
rotating for some time. Stay away from the machine until
all moving parts have come to a complete standstill.
If an obstacle is hit, disengage the PTO drive, stop the
tractor engine, remove the ignition key and wait for all
moving parts to come to a complete standstill. Check the
entire machine for any damage before resuming work.
Safety
15
3.Location and description of safety
decals on the machine
Location of safety decals
HRB353D
Power harrows
HRB353D - 403D
16
Safety
HRB403D
Power harrows
HRB353D - 403D
Safety
17
Description of safety decals
Operating instructions (1)
The operators' manual contains all the information
necessary for using the machine safely. It is imperative
to read and comply with all instructions.
Working on the machine (2)
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key and
wait until all moving parts have come to a complete stop
and apply park brake.
Power harrows
HRB353D - 403D
Projections (3)
Stones and other debris pro jected by the moving parts
can travel a long distance. Always stay at a safe distance
from the machine.
Rotary tools (4)
Keep away from rotating elements and from the machine
all the time the engine is running, the PTO drive is
engaged and the rotors are turning.
18
Safety
Do not step on the machine (5)
Do not step on the machine: Risk of falling or damaging
the protection device.
Power harrows
HRB353D - 403D
Safety
19
4.Road safety equipment and
recommendations
The road safety equipment is mounted in the factory or
by your authorized Kuhn dealer according to current
safety regulations. Always keep to the legal speed limit
for driving a tractor-machine assembly on public roads.
The rear safety device comprises:
- 2 red reflectors (1).
Power harrows
HRB353D - 403D
The front safety device comprises:
- 2 white reflectors (1).
If the machine is over the maximum legal size, follow the
local regulations for special transportation of oversize
equipment.
When using a lengthways transport device
follow the manufacturer's instructions.
20
Safety
$Machine specifications
1.Description and glossary
0
Power harrows
HRB353D - 403D
1 :
3 :
5 :
7 :
9 :
Gearbox
Scraper bar
Blade
Blade holder
Trough
2 :
Roller
4 :
Side deflector
6 :
lower links
8 :
PTO shaft
Machine specifications
21
2.Technical specifications
Power harrows
HRB353D - 403D
HRB
353D
Coupling device3 point linkage category 2 and 3
PTO speed1000 min
Number of rotors1213
Number of blades right / left12 / 1214 / 12
Working width3.50 m (11’6’’)4.00 m (13’1’’)
Working depthfrom 20 to 200 mm (1’’ - 8’’)
Overall width3.68 m (12’1’’)4.11 m (13’6’’)
Power requirement
Maximum allowable DIN engine
power
Weight:
- With Maxicrumbler roller
- With PK2 Packer roller
- With Maxipacker roller
59 kW
(80 hp)
118 kW (160 hp)
1290 kg (2843 lb)
1525 kg (3362 lb)
1575 kg (3472 lb)
-1
HRB
403D
66 kW
(90 hp)
1380 kg (3042 lb)
1650 kg (3637 lb)
1700 kg (3747 lb)
22
Machine specifications
3.Required equipment
Primary PTO shaft
The machines are factory fitted with one of the following
PTO shafts:
(Part no. 4600547)
1 3/8’’ - 6 spline pto shaft.
or
(Part no. 4600548)
1 3/8’’ - 21 spline pto shaft.
or
(Part no. 4600549)
1 3/4’’ - 6 spline pto shaft.
or
(Part no. 4600550)
1 3/4’’ - 20 spline pto shaft.
or
(Part no. 4600551)
32 x 38 - 8 spline pto shaft.
Power harrows
HRB353D - 403D
Power harrow blades
The machines are factory fitted with one of the following
blades:
Part no. K2500071 and Part no. K2500081
Standard left and right blade.
or
Part no. K2502260 and Part no. K2502270
Left and right DURAKUHN blade.
Available as spare parts:
Part no. K2502060 and Part no. K2502070
Left and right long blade (special for potatoes).
Machine specifications
23
Rollers
The roller is used as a protection device at
the rear of the machine. It must never be
removed for work.
The roller is an essential element of the harrow and has
the following 4 functions:
- Set and control the working depth.
- To pack the soil evenly behind the rotors and create
an optimum seedbed.
- To increase seedbed crumbling and clod break-up.
- To improve seedbed levelling.
The machines are factory fitted with one of the following
rollers:
Maxicrumbler roller:
HRB353D: Part no. 1238630
HRB403D: Part no. 1209170
The Maxicrumbler roller is adapted to dry or slightly wet
soils.
Power harrows
HRB353D - 403D
This equipment is not recommended when the
power harrow is used in combination with a see d
drill.
24
Machine specifications
or
Packer PK2 roller:
HRB353D: Part no. 1237020
HRB403D: Part no. 1237030
The Packer PK2 roller is adapted to soils which are
subject to capping or very clayey and sticky. The roller is
fitted with a scraper bar. Scraper plates are located
between the rows of studs to ensure roller cleaning.
or
Maxipacker roller:
HRB353D: Part no. 1238430
HRB403D: Part no. 1238440
The Maxipacker roller is adapted to all soil types and
particularly to wet and sticky soils. The roller is fitted with
a scraper bar. Scraper plates are located between the
rows of studs to ensure roller cleaning.
Power harrows
HRB353D - 403D
Machine specifications
25
Power harrows
HRB353D - 403D
4.Sound levels
Sound levels have been measured in accordance with the measuring methods as defined in:
NF EN 1553 "Agricultural machinery - Self-propelled, mounted, semi-mounted and trailed - Common
safety recommendations"
Weighted equivalent continuous acoustic pressure level at the driver's seat (closed cabin) L (A) eq:
Tractor only:
HRB353DHRB403D
77.7 dB(A)76.7 dB(A)
Tractor + machine:
HRB353DHRB403D
77.1 dB(A)80.8 dB(A)
26
Machine specifications
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