OPERATOR'S MANUAL
Power harrows
HR303D/M
KN110FGB A
- English - 12-2006
Power harrows
HR303D/M
$DEAR OWNER
In buying a Kuhn machine you have chosen wisely. Into it have gone years of thought, research and
improvements. 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 by
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 this 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 are 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
HR303D / HR303M power harrows must only be used for work for which they have been designed: Seedbed
preparation on ploughed ground or in min-tilled ground with or without simultaneous seeding.
Document illustrations
The illustrations in this manual may be based on one type of machine only. However, all instructions apply to all
machines covered in this manual.
Dear Owner
1
Power harrows
HR303D/M
$CONTENTS
Dear Owner..................................................................................................................... 1
Contents .........................................................................................................................2
Identification of the machine ........................................................................................4
Front view ......................................................................................................................................... 4
Rear view .......................................................................................................................................... 4
Model identification plate................................................................................................................ 5
Optional equipment ......................................................................................................................... 6
Safety ..............................................................................................................................8
Description of symbols used in this document ............................................................................ 8
Safety instructions........................................................................................................................... 9
Location and description of safety decals on the machine....................................................... 17
Road safety equipment and recommendations .......................................................................... 20
Machine specifications................................................................................................ 21
Description and glossary .............................................................................................................. 21
Technical specifications................................................................................................................ 22
Required equipment ...................................................................................................................... 23
Sound levels................................................................................................................................... 26
Putting into service...................................................................................................... 27
Coupling and uncoupling.............................................................................................................. 27
Instructions for transport............................................................................................ 48
Putting the machine into transport position ............................................................................... 48
Conformity with the road regulations .......................................................................................... 48
2
Contents
Power harrows
HR303D/M
Instructions for work....................................................................................................49
Putting the machine into work position ...................................................................................... 49
Adjustments in working position .................................................................................................49
Machine use ................................................................................................................................... 51
Optional equipment......................................................................................................53
Sets of gearwheels ........................................................................................................................ 53
Standard linkage............................................................................................................................ 55
Hydraulic lift linkage...................................................................................................................... 56
Hydraulic lift linkage stroke limiters ............................................................................................ 61
High capacity hydraulic lift linkage.............................................................................................. 62
Track eradicators........................................................................................................................... 67
Front or rear levelling bar ............................................................................................................. 69
Lighting and signalling ................................................................................................................. 70
Front semi-automatic linkage....................................................................................................... 70
Adaptation parts for VENTA LC.................................................................................................... 71
Adaptation parts for VENTA AL and VENTA TI ........................................................................... 71
Adaptation parts for INTEGRA ..................................................................................................... 72
Maintenance and storage ............................................................................................73
Cleaning the machine.................................................................................................................... 74
Lubrication ..................................................................................................................................... 75
Maintenance................................................................................................................................... 79
Storage ........................................................................................................................................... 86
Trouble shooting guide................................................................................................87
Limited warranty...........................................................................................................89
Contents
3
1. Front view
Power harrows
HR303D/M
$IDENTIFICATION OF THE MACHINE
2. Rear view
4
Identification of the machine
3. Model identification plate
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.
Power harrows
HR303D/M
Type: HR303D / HR303M
No:
Identification of the machine
5
4. Optional equipment
Tick box corresponding to the equipment fitted on your
machine:
HR303D and HR303M
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.
Kit no. 1238840: Track eradicator mounting yokes.
Kit no. 1216610: 2 track eradicators with traction bolt overload mechanism.
Power harrows
HR303D/M
Kit no. 1216620: 2 track eradicators with spring overload mechanism.
Kit no. 1238660: Front or rear levelling bar.
Kit no. 1238170: Signalling equipment.
Kit no. 1238950: Signalling equipment specific to Italy.
Kit no. 1237950: Semi-automatic front linkage category 2.
Kit no. 1237960: Semi-automatic front linkage category 3.
Kit no. 1286369: Adaptation parts for VENTA LC.
Kit no. 1286168: Floating adaptation parts for adaptation of VENTA AL and VENTA TI roller.
Kit no. 1286267: Rigid adaptation parts for adaptation of VENTA AL and VENTA TI.
Kit no. 1616350: Floating adaptation parts for INTEGRA roller (Packer PK2 roller and Maxipacker roller).
Kit no. 1616363: Floating adaptation parts for INTEGRA roller (Packliner roller).
Kit no. 1616373: Rigid adaptation parts for INTEGRA.
6
Identification of the machine
HR303D
Kit no. 1237930: Set of gearwheels (24 and 32 teeth matching gears).
Kit no. 1239130: Set of gearwheels (21 and 35 teeth matching gears).
HR303M
Kit no. 1237420: Set of gearwheels (19 and 26 teeth matching gears).
Power harrows
HR303D/M
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
HR303D/M
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
HR303D/M
2. Safety instructions
Introduction
The machine must only be operated, maintained and repaired by competent persons who are familiar with
machine specifications and operation and aware of safety regulations for 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 legislation concerning accident prevention, work 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 and accessories, as recommended
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 accidents resulting 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 trained
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-protectors,
etc.).
Make sure that all operating controls (ropes, cables,
rods, etc) are placed so that they cannot be set off
accidentally, risking accident or damage.
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
HR303D/M
Precautions when driving
Precision steering, tractor adherence, road holding and
efficient braking are influenced by the type of implement,
weight, ballast of front axle, ground or road conditions. It
is therefore of the utmost importance to be cautious in
every given situation.
Groundspeed must be adapted to ground conditions as
well as to roads and paths. Always avoid abrupt changes
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 transports of oversize
equipment.
Gross weight and weight per axle
Check that the tractor's authorized gross weight as well
as its lift capacity and maximum weight per axle are not
surpassed.
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
HR303D/M
Transport position
Before transporting the machine on public roads, place
the machine into its transport position, according to the
instructions in this manual.
Lightings and signallings.
Before transporting the machine on public roads, 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.
Safety
11
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
provided for this purpose.
Never stand between the tractor and the machine when
operating the rear remote control lever of the three point
linkage.
Do not stand between the tractor and the machine
without ensuring that the parking brake is applied.
Power harrows
HR303D/M
12
Safety
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 protection must be replaced
immediately. A worn guard or an unprotected 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 recommendations.
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
HR303D/M
Safety
13
Precautions during manoeuvres
When moving the machine from the transport position to
the working position and vice versa, make sure that
nobody is within the machine pivoting area.
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 to respect, 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
HR303D/M
Waste disposal
Respect the environment! Never spill pollutants (oil,
grease, filters etc.) on the ground neither pour them
down the drain or discard them in any other place where
they could pollute the environment. Never throw away or
burn a tire. Always take waste to specialized recycling or
waste disposal centers.
14
Safety
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 ground, 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-protectors,
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
HR303D/M
Safety
15
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
HR303D/M
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 element.
Make sure all the guards are in place. Keep 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.
16
Safety
3. Location and description of safety decals on the machine
Location of safety decals
Power harrows
HR303D/M
Safety
17
Description of safety decals
Operating instructions (1)
The operator's 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
HR303D/M
Projections (3)
Stones and other debris projected by the moving parts
can travel a long distance. Always stay at a safe distance
from the machine.
18
Safety
Rotary tools 4
Keep away from rotary elements and from the machine
all the time the engine is running, the PTO drive is
engaged and the rotors are turning.
Do not step on the machine (5)
Do not step on the machine: Risk of falling or damaging
the protection device.
Power harrows
HR303D/M
Safety
19
4. Road safety equipment and recommendations
The road safety equipment is mounted in the factory or
by your authorized 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
HR303D/M
The front safety device comprises:
- 2 white reflectors (1).
20
Safety
$MACHINE SPECIFICATIONS
1. Description and glossary
0
Power harrows
HR303D/M
1 :
Gearbox
3 :
Scraper bar
5 :
Side deflector
7 :
lower links
9 :
PTO shaft
2 :
4 :
6 :
8 :
10 :
Roller
Anti-ridging plate
Blade
Blade holder
Trough
Machine specifications
21
Power harrows
2. Technical specifications
HR303D HR303M
Coupling device 3 point attachment category 2 and 3
PTO speed 1000 min
Number of rotors 10
Number of blades right / left 10 / 10
Working width 3.00 m (9’9’’)
Working depth from 30 to 250 mm (1.18’’ - 10’’) (approximately)
Overall width 3.08 m (10’10’’)
-1
HR303D/M
DIN engine power
requirement
Maximum allowable DIN
engine power
Weight:
- With crumbler roller
- With Maxicrumbler roller
- With PK2 Packer roller
- With Maxipacker roller
- With Packliner roller
139 kW (190 hp)
1090 kg (2403 lb) (approximately)
1100 kg (2425 lb) (approximately)
1295 kg (2855 lb) (approximately)
1320 kg (2910 lb) (approximately)
1490 kg (3285 lb) (approximately)
59 kW (80 hp)
1130 kg (2491 lb) (approximately)
1140 kg (2513 lb) (approximately)
1335 kg (2943 lb) (approximately)
1360 kg (2998 lb) (approximately)
1530 kg (3373 lb) (approximately)
22
Machine specifications
3. Required equipment
Cardan drive
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.
Power harrows
HR303D/M
Power harrow blades
The machines are factory fitted with one of the following
blades:
Part no. K2500090 and Part no. K2500100
Standard left and right blade.
or
Part no. K2501120 and Part no. K2501130
Left and right OPTIMIX blade.
or
Part no. K2502240 and Part no. K2502250
Left and right DURAKUHN blade.
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
following 4 functions:
- Set and control the working depth.
- To pack the soil evenly behind the rotors to 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:
Power harrows
HR303D/M
Crumbler roller: Kit no. 1236440
The Crumbler roller is adapted to dry or slightly wet soils.
The roller is fitted with removable bars for reducing risks
of clogging.
This equipment is not recommended when the
power harrow is used in combination with a seed
drill.
or
Maxicrumbler roller: Kit no. 1209150
The Maxicrumbler roller is adapted to dry or slightly wet
soils.
This equipment is not recommended when the
power harrow is used in combination with a seed
drill.
24
Machine specifications
or
Packer PK2 roller: Kit no. 1237010
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: Kit no. 1238420
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
HR303D/M
or
Packliner roller: Kit no. 1238250
The Packliner roller creates rows at regular depth in
which seeds are placed. The roller is fitted with a scraper
bar. The scraper plates are placed between the rubber
bandings to clean the roller.
Machine specifications
25
Power harrows
HR303D/M
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:
HR303D HR303M
78.2 dB(A) 78.2 dB(A)
Tractor + machine:
HR303D HR303M
80 dB(A) 80 dB(A)
26
Machine specifications
$PUTTING INTO SERVICE
1. Coupling and uncoupling
Description of coupling elements
Category 2 linkage
- 2 hitch pins diameter 28 mm (1.10’’) for the lower link
arms.
- A top link hitch pin diameter 25 mm (0.98’’).
- A PTO shaft.
Power harrows
HR303D/M
Preparing the tractor
The machine adapts to tractors fitted with a 3-point hitch
coupler category 2 or 3.
The tractor PTO stub must rotate at a nominal speed of
1000 min
-1
.
The power harrow can also be used with tractors
having a PTO speed of 540 min
750 min
intermediate speeds.
The 540 min-1 PTO speed must be used
occasionally and only for top soil work in
light conditions or in conditions requiring
tractor power lower than 73 kW (100hp).
The tractor must be fitted with lower link
stabilizers.
1
.The rotors are then driven at
-1
or
The front axle load (1) must never, under any
circumstances, be less than 20% of the
tractor's unladen weight.
Putting into service
27
Parallelism of lower linkage arms
Adjust tractor lift rods so that lower linkage arms are
parallel to the ground.
Preparing the machine
Power harrows
HR303D/M
Positioning of lower coupling yokes
The lower coupling yokes can be placed in 2 different
positions:
Set back position (a): Allows to bring the machine's
centre of gravity closer to the tractor when the power
harrow is used in combination with an additional
machine.
Forward position (b): Prevents interference risks with
tractor wheels when fitting certain optional equipment.
The machine is supplied with lower coupling
yokes fitted in position (a).
28
Putting into service
Adjustment
- Remove roll pin (1).
- Remove pin (2).
- Fit lower coupling yoke (3) in the required position.
- Insert pin (2).
- Insert roll pin (1) to secure pin.
- Proceed the same way on the other side.
Check that the 2 lower links have been adjusted
identically.
Power harrows
HR303D/M
Coupling the machine
- Remove the lower hitch pins.
- Position tractor lower links inside machine attachment
yokes.
- Position ball joints of tractor lower links in line with
holes of machine lower yokes.
- Insert lower hitch pins and secure them with lynch
pins.
When the tractor is fitted with a standard 3 point
attachment category 2, use category 2 lower
hitch pins Part no. 52592400 (Factory supplied).
When the tractor is fitted with a standard 3 point
attachment category 3, use category 3 lower
hitch pins Part no. 52592500 (Available as
spare parts).
Putting into service
29
.
- Attach top link with hitch pin.
When the tractor is fitted with a standard 3 point
attachment category 2, use category 2 upper
hitch pins Part no. 52596900 (Factory supplied).
When the tractor is fitted with a standard 3 point
attachment category 3, use category 3 upper
hitch pins Part no. 52597000 (Available as spare
part).
• Use tractor and machine attachment holes to adjust
the top link position.
To obtain optimum PTO shaft angles and
tractor lift capacity, the top link must be
parallel to the lower links or slightly pointing
downwards towards the tractor.
Power harrows
HR303D/M
- Insert hitch pin anti-rotation arm (1) in the machine
mounting yoke and secure with lock pin.
30
Putting into service
Primary PTO shaft
Make sure that the PTO shaft is correctly
adjusted, to avoid premature wear and tear.
Separate the two half PTO shafts and connect them to
the machine's input shaft and to the tractor PTO stub.
Check the length of the PTO shaft:
- Fully raise the machine:
• When the PTO shaft is in its maximum extended
position, the tube overlap must be more than
220 mm (8.6’’).
- Lower the machine in order to place PTO shaft in
horizontal position:
• When the PTO shaft is in its maximum overlap
position (retracted), tubes should not butt against
the yokes. As a safety measure, a clearance (L) of
at least 10 mm (0.39’’) must be maintained.
Power harrows
HR303D/M
If this is not the case:
Follow instructions given in the operator's
manual delivered with the PTO.
Never operate the PTO shaft at an angle X exceeding
30°.
Putting into service
31
To avoid serious accidents, the PTO drive
shaft guards must be properly in place and
fixed with the chains provided.
Attach PTO shaft guard chain in hole (1) on machine
side.
Immediately replace any worn or damaged
guard.
Power harrows
HR303D/M
Cam type cut-out clutch
The PTO shaft is factory fitted with a cam type cut-out
clutch. Check that cut-out clutch disengages during the
first periods of use:
- If the cam type cut-out clutch disengages too
frequently, the adjustment is too light. (See section:
Cam type cut-out clutch adjustment).
- If the cam type cut-out clutch does not disengage,the
adjustment is too heavy. (See section: Cam type cutout clutch adjustment).
The cam type cut-out clutch is based on the principle of
disengaging cams that release when an overload
occurs. When the cut-out clutch releases, it cuts-out
torque transmission to the machine.
When the cam type cut-out clutch releases:
- Disengage tractor PTO.
- Lift the machine off the ground.
- Engage the tractor PTO.
The cam type cut-out clutch re-engages
automatically.
32
Putting into service
Power harrows
HR303D/M
If a foreign object gets caught in the machine:
Before carrying out any maintenance or repairs on the machine, switch off the tractor
engine, remove ignition key, wait until all moving parts have come to a standstill and
apply park brake.
Remove foreign body.
Check that no working parts have been damaged.
Engage the tractor PTO.
The cam type cut-out clutch re-engages automatically.
Do not re-engage cut-out clutch by simply reducing the PTO speed (rotational
frequency). This could cause premature wear of the cut-out clutch due to friction
between the cams and their housings.
Fitting the cam type cut-out cluch.
Fitting of the cam type cut-out clutch to the side gearbox
drive shafts is effected by a clamp cone which locates in
the drive shaft attachment groove.
Cam type cut-out clutch removal.
- Uncouple PTO shaft on machine side.
- remove cam type cut-out clutch guard.
- Loosen clamp cone by unscrewing the cone a few
turns.
- Using a punch diameter 10 mm (0.4’’), free clamp
cone from its seat.
- Fully remove clamp cone.
- Remove cam type cut-out clutch from input shaft.
Putting into service
33
Fitting the cam type cut-out clutch.
Regularly check that there is no play between
the cam type cut-out clutch and its shaft.
With the clamp cone disassembled:
- Slide cam type cut-out clutch on shaft and align clamp
cone housing with the shaft circular groove.
- Screw the clamp cone in its housing while at the same
time giving a slight alternate and axial movement so
that the clamp cone takes the right position in the
circular groove.
- Torque at 7 daN m (51 lbf ft).
- Reinstall cam type cut-out clutch guard.
Cam type cut-out clutch adjustment:
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Adjust cut-out clutch setting to the tractor power.
Never exceed the maximum allowable DIN
engine power: 139 kW (190 hp).
Altering the setting:
Before disassembling, check that the cam type cut-out
clutch is engaged.
Remove cam type cut-out clutch from input shaft.
Using a screwdriver:
- Remove seal (1).
Remove circlip (2).
Remove the hub assembly:
- Disengage cams (3) taking note of their position.
- Remove spring cartridge (4).
34
Putting into service
Spring cartridge adjusment:
- Measure dimension L (Using a vernier caliper).
- Note measure L in the box (only when removing clutch
for the first time). The measure L is generally
comprised between 51.7 and 52.5 mm (2.03’’ - 2.06’’).
- Adjust measure L to the required length.
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By increasing the dimension L, the release effort
is reduced and vice versa.
Putting into service
35
- Tighten hexagonal (6 faces) head screw (1) of spring
cartridge in a vice.
- Remove pin (2).
- Tighten or loosen nut (3).
- Refit pin (2).
- Grease all components.
- Reinstall the assembly and make sure that the cams
are positioned correctly (4): The angled faces of the
cams must match the angled slots in the bore of the
housing.
- Reinstall the cam type cut-out clutch onto its shaft.
PTO output on gearbox
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The gearbox is factory fitted with a rear PTO output that
rotates in the same direction and at the same speed as
the tractor PTO.
The rear PTO enables driving a complementary tool.
When using the rear PTO output stub, remove guard (1)
and fit plastic safety guard (2) (Part no. 58707010).
The rear PTO output power is limited to
37 kW (50 hp).
When the rear PTO output is no longer used,
remove guard (2) and reinstall guard (1).
HR303M:
The rear PTO output must not be used with
gears disengaged (risk of gearbox damage
due to lubrication defect).
36
Putting into service
Adjusting the machine
Lateral adjustment of the lower linkage arms
- Balance the play on either sides of the lift linkage and
lock lower link stabilizers.
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Front/rear machine levelling
Adjust the top link length so that the machine is
horizontal with regards to the ground.
Putting into service
37
Rotor speed adjustment (HR303D)
The rotor speed can be adjusted by inverting the
standard gearwheels or by using optional gearwheel
sets.
- Select required rotor speed in the following chart.
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Refer to the decal fitted on the machine .
38
Putting into service
- Reduce top link length to slightly tilt the machine
forward.
- Remove screws (1) and gearbox cover (2).
- Position gearwheels according to the required speed.
- Clean and reassemble the unit.
Check o-ring is in correct position in gearbox
cover.
- Tightening torque: 10 daN m (74 lbf ft)
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Putting into service
39
Rotor speed adjustment (HR303M)
The rotor speed can be adjusted by:
• Changing speed using the selector lever.
• Inverting the standard gearwheels.
• By using the optional gearwheel set.
Select required rotor speed in the following chart:
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Refer to the decal fitted on the machine .
40
Putting into service
- Position selector lever (1) in the required position:
Position (a): Gear 1 engaged.
Position (b): Gear 2 engaged.
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- Reduce top link length to slightly tilt the machine
forward.
- Remove screws (1) and gearbox cover (2).
Position gearwheels according to the required speed.
- Clean and reassemble the unit.
Check o-ring is in correct position in gearbox
cover.
- Tightening torque: 10 daN m (74 lbf ft)
Putting into service
41
Adjusting the roller scrapers
Standard plate
The scraper plates are factory preset on a reference
roller.
The scraper bar is factory fitted with:
- Packer PK2 roller:
• Non coated plates (Part no. 52532130).
- Maxipacker roller:
• Hard coated plates (Part no. 52593410).
- Packliner roller:
• Hard coated plates (Part no. K2501310).
The Packer PK2 roller can be fitted with hard
coated plates (Part no. 52560010).
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When the machine is attached, check that the roller can
rotate freely.
Adjusting the plates:
- Loosen plate attachment nut.
- Adjust plate to bring it closer to the roller but without
touching it. Check that they do not contact by giving
one turn to the roller.
- Tigthen nut:
• Torque: 8 daN m (59 lbf ft).
- Make sure the plates are well centred with regards to
the stud rows.
- The oblong holes in the scraper plate supports enable
crosswise adjustement if necessary:
• Torque: 10 daN m (67 lbf ft).
Respect the scraper plate mounting direction:
Ensure that the scraper hard coating is towards
the front and downwards.
42
Putting into service
Nylon scraper plate
- Packer PK2 roller: Nylon scraper plate
(Part no. 52570200).
- Maxipacker roller: Nylon scraper plate
(Part no. 52592300).
The nylon scraper plate is permanently in contact with
the roller tube for cleaning it.
The nylon scraper plate is particularly well suited for
light, silty or chalky soils, or soils with a small amount of
plant residues or stones.
Fitting and adjusting the nylon scraper plate:
- Place nylon plate between 2 metallic scraper plates:
• Packer PK2 roller (Part no. 52532130).
• Maxipacker roller (Part no. 52598910).
- The nylon scraper plate must protrude the metallic
scraper plates by approximately 10 mm (0.4’’).
The nylon plate is reversible for longer service life.
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Side deflector anti-ridging plate adjustment
For safety reasons, it is not allowed to fold
the side deflectors over the trough.
The deflector anti-ridging plate is factory fitted in the
forward position (1) and medium height position (2).
The deflector anti-ridging plate position must be adapted
to:
- The working depth.
- The blade wear.
The lengthways position of the deflector anti-ridging
plate must be adapted to:
- The position and type of roller.
Remove bolts (3).
Adjust side deflector anti-ridging plate in the required
position.
The anti-ridging plates must be positioned at the
nearest of the roller, without interference.
Adjust both sides to the same setting.
Putting into service
43
Roller rear offset adjustment
- For machines fitted with the following rollers:
• Maxicrumbler roller
• Packer PK2 roller
• Maxipacker roller
• Packliner roller
The roller is mounted in position (a): It is forbidden to alter this setting.
- For machines fitted with the following roller:
• Crumbler roller
The roller can be fitted in 2 rear positions (a) or (b).
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Set back position (a): Enables limiting soil projection on
the roller.
Forward position (b): Enables reducing the machine
overhang.
44
Putting into service
From the working position:
- Remove roll pins (1): 1 on each machine side.
- Remove pins (2): 1 on each machine side.
- Position roller in holes corresponding to the required
assembly.
- Reinstall pins (2): 1 on each machine side.
- Insert roll pins (1) to lock pin: 1 on each machine side.
Adjust both sides to the same setting.
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Putting into service
45
Crumbler roller adjustment
The Crumbler roller consists of 8 welded tubes (1) and 8
removable rods (2).
Depending on the working conditions, the rods (2) can
be removed.
With removable rods in place: (a)
For use in dry conditions, gives fine crumbling and
levelling as well as good packing.
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With removable rods removed: (b)
Recommended for use in wetter conditions, it reduces
risk of clogging. Produces a coarser crumbling and
levelling.
To remove the rods:
- Remove roll pins (1).
- Dislodge rods using a hammer.
- Pull firmly on rods to remove them completely.
46
Putting into service
Uncoupling the machine
Park the machine on an even fairly level
ground.
When track eradicators are fitted on the
machine, they must be raised before parking
the machine.
- Lower the tractor three-point linkage to rest the
machine on the ground.
- Uncouple the PTO shaft from the tractor.
- Place PTO shaft in holder (1).
- Detach the top link from the machine end.
- Uncouple lower linkage arms.
- Lower the tractor three-point linkage.
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The machine is uncoupled.
Handling
When lifting this equipment, use appropriate
lift straps, chains or any other equipment, in
perfect working order, complying with safety
standards in force for this type of equipment,
and with capacities that exceed the total
weight of the unit, as listed in this manual
(Refer to the technical specifications' chart).
The location of lifting points is indicated by a pictorial:
Part no. 09905510.
Use lifting points (1).
Putting into service
47
$INSTRUCTIONS FOR TRANSPORT
Before placing the machine into transport
position:
Wait until the rotating parts have come to a
complete stop.
1. Putting the machine into transport position
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The transport position is obtained by raising the tractor's
three-point linkage.
The machine is in transport position.
Never engage the tractor PTO drive when the
machine is in transport position.
2. Conformity with the road regulations
Before driving the machine on public roads,
ensure that the machine meets current
highway code regulations.
Check that reflectors are clean.
During transport, adapt the travel speed to
the road conditions.
48
Instructions for transport
$INSTRUCTIONS FOR WORK
1. Putting the machine into work position
Before placing the machine in working
position:
- Check that nobody is within the machine
pivoting area.
- If there is someone, make sure the
person moves away.
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From the transport position:
Lower machine until blades are at 100 - 150 mm (3.9’’ -
5.9’’) from the ground.
The machine is in working position.
2. Adjustments in working position
Working depth
The roller ensures working depth adjustment and
control.
Fit the adjustment pin (2) in one of the adjusting plate
holes (1) to adapt the working depth.
Adjust both sides to the same setting.
Instructions for work
49
Side deflectors anti-ridging plates.
Adjust side deflector anti-ridging plates according to the
working depth. (See section ’’Side deflector anti-ridging
plate adjustment’’).
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50
Instructions for work
3. Machine use
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.
- Lower machine until blades are at 100 - 150 mm (3.9’’
- 5.9’’) from the ground.
- Engage tractor PTO drive before working with the
machine.
Engaging the machine in the ground before engaging the tractor PTO can lead to excessive
power requirement and trigger the torque limiter.
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- Lower the machine progressively while on the move.
- Do not disengage PTO and do not stop tractor before
having lifted the machine from the ground.
Only work in straight lines. Lift the machine to turn.
Use of the power harrow entails limits which must be respected in all situations and that are
often tied in with:
- Weather conditions: Avoid working during and immediately after rain, wait until the ground
to be worked is completely drained.
- Soil types: Smooth clods indicate too malleable or too humid soil to be worked in; Wait until
ground is completely drained. Soil concistency is ideal when clods crumble without
sticking.
- Tractor power: Adapt working depth, speed and rotor speed to power available and work to
be done. Never exceed the maximum allowable DIN engine power: 139 kW (190 hp).
The nature of the work: the power harrow is an excellent implement for secondary tillage and
seedbed preparation after conventional ploughing, chisel ploughing or soil loosening. It is far
less efficient for primary tillage work especially on hard and dry ground.
Instructions for work
51
The clod size depends on:
- The rotor speed.
- The forward speed.
- The working depth.
- the use of levelling bars (Optional equipment).
- The Crumbler roller being fitted or not with removable bars.
Example: large clods result from a low rotor speed and a high forward speed.
Groundspeed
Groundspeed must be adapted to the encountered
working conditions.
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52
Instructions for work
$OPTIONAL EQUIPMENT
1. Sets of gearwheels
With this equipment, additional rotor speeds may be
obtained.
HR303D
Kit no. 1237930
Set of 24 and 32 teeth gearwheels.
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Kit no. 1239130
Set of 21 and 35 teeth gearwheels.
Optional equipment
53
HR303M
Kit no. 1237420
Set of 19 and 26 teeth gearwheels.
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54
Optional equipment
2. Standard linkage
Kit no. 1246020
This equipment allows an additional machine to be
coupled.
The equipment is composed of:
• A mechanical 3-point linkage.
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Adjustment
Overhang:
- Loosen bolts (1).
- Place lower link (2) in the required position.
- Reinstall and tighten screws (1).
Adjust both sides to the same setting.
Distance between the lower links:
- Change the position of the 4 R-clip (1) on bent spacer
(2) to alter the distance between the lower links.
The bent part of spacer (2) can be positioned
upwards or downwards to avoid interference
with the additional machine.
- Tension stabilisation chains (3).
Height of the lower linkage arms:
- Use chain tensioners (4) to adjust height of lower
links.
Optional equipment
55
3. Hydraulic lift linkage
Kit no. 1246030
This equipment allows an additional machine to be
coupled.
This equipment is used to reduce the combination's
overhang when fitting an additional machine.
The equipment is composed of:
• A 3-point hydraulic attachment category 2.
Lifting capacities
Tractor hydraulic
pressure
Overhang
minimum
Overhang
maximum
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150 bar
(2175 psi)
180 bar
(2610 psi)
Location and description of safety decals
2100 daN
(4629 lb)
2500 daN
(5511 lb)
1600 daN
(3527 lb)
2100 daN
(4629 lb)
on the machine
Location of safety decals
56
Optional equipment
Description of safety decals
Crushing area (1)
Never operate in an area where there is a crushing risk
before all moving parts have come to a complete stop.
Additional machine lowering (2)
Make sure that the additional machine rests on the
ground:
- Before turning off the engine
- Before carrying out any maintenance or repair on the
machine
- Before parking the assembly
Crushing hazard.
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Putting into service
Hydraulic connection
Connect hydraulic hose to a single acting spool valve.
Optional equipment
57
Adjustment
Categories of linkage:
The hydraulic attachment can be adapted for additional
machines with a standard linkage category 1 or 2.
- Category 1 linkage adaptation: (a)
• A = 683 mm (2’2’’).
- Category 2 linkage adaptation: (b)
• B = 825 mm (2’8’’).
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Attachment brackets:
The attachment hooks can be positioned at 2 different
heights to obtain best adaptation of the additional
machine.
- Remove bolts (2) and nuts (1).
- Place hook (4) and spacers (3) in the required
position.
- Reinstall bolts (2) and nuts (1).
Tightening torque: 42 daN m (309 lbf ft):
Adjust both sides to the same setting.
58
Optional equipment
Overhang:
The combination overhang can be reduced by
220 mm (8.7’’).
Position (a): Factory setting.
Position (b): Maximum overhang.
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Position (c): Minimum overhang.
- Remove bolts (1).
- Place hydraulic attachment frame (2) in the required
position.
- Reinstall bolts (1).
Tightening torque: (1): 25 daN m (184 lbf ft).
Torque screw (3) to: 17 daN m (125 lbf ft).
Optional equipment
59
Parking
When parking the power harrow/additional
machine unit, make sure that the additional
machine is lowered first.
Instructions for transport
Putting the machine into transport position
From the working position:
- Uncouple the PTO shaft (between the power harrow
and the additional machine).
- Attach one side of safety chain (1) to the power harrow
headstock (2) and the other end to the hydraulic lift
linkage frame (3).
- Insert and lock pins using R-clips.
- Tighten chain.
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Maintenance
Every 100 hours
Grease:
- Pivot points.
60
Optional equipment
4. Hydraulic lift linkage stroke limiters
Kit no. 1246040
This equipment prevents damage to the PTO
transmission shaft when lifting an additional
implement which is PTO driven.
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Adjustment
- Couple up the PTO shaft (between the power harrow
and the additional machine).
- Lift the combined machine using the rear hydraulic lift
linkage:
• When the PTO shaft is in its maximum overlap
position (retracted), tubes should not butt against
the yokes. As a safety measure, a clearance (L) of
at least 25 mm (1’’) must be maintained.
- Fit the stroke limiters to the hydraulic lift linkage.
- Install the 4 washers.
- Insert and lock lynch pins (1) of each pin.
- Tighten the assembly using nut (2).
Machine use
By fitting the hydraulic attachment stroke limiters, the
additional machine's lift height can be controlled.
By removing the stroke limiters, the additional machine
can be fully raised.
If the power harrow is used with an additional
PTO driven machine, make sure to uncouple
PTO shaft before fully raising the additional
machine.
Optional equipment
61
5. High capacity hydraulic lift linkage
Kit no. 1239140
This equipment allows an additional machine to be
coupled.
The equipment is composed of:
• A 3-point hydraulic attachment category 2.
Lift capacity of approximately 3300 daN
(7275 lbf) for a tractor pressure of 180 bar
(2610 psi).
Location and description of safety decals on the machine
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Location of safety decals
62
Optional equipment
Description of safety decals
Crushing area (1)
Never operate in an area where there is a crushing risk
before all moving parts have come to a complete stop.
Additional machine lowering (2)
Make sure that the additional machine rests on the
ground:
- Before turning off the engine
- Before carrying out any maintenance or repair on the
machine
- Before parking the assembly
Crushing hazard.
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Putting into service
Hydraulic connection
Connect hydraulic hose to a single acting spool valve.
Optional equipment
63
Adjustments
Attachment brackets:
The attachment hooks can be fitted in 3 different
positions to obtain best adaptation of the additional
machine.
- Loosen screw (3).
- Remove bolt (2) and nut (1).
- Place hook (4) in the required position.
- Reinstall bolt (2) and nut (1).
- Tighten bolts (2) and (3). Tightening torque: 42 daN m
(309 lbf ft):
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Adjust both sides to the same setting.
64
Optional equipment
Hydraulic stroke limiting device:
This device prevents damage to the PTO
transmission shaft when lifting an additional
implement which is PTO driven.
Adjustment
- Couple up the PTO shaft (between the power harrow
and the additional machine).
- Lift the combined machine using the rear hydraulic lift
linkage:
• When the PTO shaft is in its maximum overlap
position (retracted), tubes should not butt against
the yokes. As a safety measure, a clearance (L) of
at least 25 mm (1’’) must be maintained.
- Keep hydraulic valve lever (3) in the off position and
position chain (1) in holder (2) in order to loosen
tension on chain.
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Machine use
By fitting the hydraulic attachment stroke limiter chain,
the additional machine's lift height can be controlled
when making headland turns.
By removing the hydraulic attachment stroke limiter
chain, the additional machine can be fully raised.
If the power harrow is used with an additional
PTO driven machine, make sure to uncouple
PTO shaft before fully raising the additional
machine.
Optional equipment
65
Parking
When parking the power harrow/additional
machine unit, make sure that the additional
machine is lowered first.
Instructions for transport
Putting the machine into transport position
From the working position:
- Remove the hydraulic attachment stroke limiter chain.
- Uncouple the PTO shaft (between the power harrow
and the additional machine).
- Completely raise the hydraulic lift linkage.
- Fit safety plate (1).
- Insert and secure lynch pin (2).
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Maintenance
Every 100 hours
Grease:
- Pivot points.
66
Optional equipment
6. Track eradicators
The track eradicators reduce tractor wheel marks in the
seedbed.
The equipment is composed of:
- A set of tine holders Kit no. 1238840.
- A set of 2 track eradicator tines:
• With traction bolt overload mechanism: Kit
no. 1216610 (a).
or
• With spring overload mechanism: Kit
no. 1216620 (b).
Only use track eradicators for secondary tillage
work.
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Lateral adjustment
- Loosen U-bolts (1).
- Track eradicators must be mounted centred with
regards to the tractor wheels.
- Tighten U-bolts (1).
Torque: 21 daN m (155 lbf ft).
Fit additional track eradicators when using wide tyres or
dual wheels.
2 track eradicators with traction bolt overload
mechanism: Kit no. 1216610.
2 track eradicators with spring overload
mechanism: Kit no. 1216620.
If the distance between track eradicators and
tyres is too small, fit lower links in forward
position.
Working depth adjustment
Adjust the track eradicator working depth using pin (2).
The track eradicator working depth must not
exceed 100 mm (4’’).
Optional equipment
67
The track eradicators are fitted with an overload
mechanism should they encounter an obstacle:
- With traction bolt overload mechanism:
Bolt breaks: Part no. 80131051
Nut: Part no. 80201030
- With spring overload mechanism:
The track eradicator automatically regains its position
after having cleared the obstacle.
Track eradicators with spring overload
mechanism are recommended for work in
difficult or stony grounds.
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- Each track eradicator share is reversible for increased
service life. Replace it if necessary.
Torque: 10 daN m (74 lbf ft).
68
Optional equipment
7. Front or rear levelling bar
Kit no. 1238660
The levelling bar can fitted to the front or rear of the
machine.
Fitting and adjusting the levelling bars.
Fit levelling bars so that their angled edges
face towards the machine front (direction of
travel).
Front position
The front levelling bar levels irregular grounds and helps
brake up dry clods.
Rear position
The rear levelling bar increases the crumbling degree in
dry soils and the roller efficiency in sandy soils.
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The rear levelling bar is not recommended in wet
and sticky soils, and when there are a lot of
stones.
The rear levelling bar increases the machine
horsepower requirement. Remove levelling
bar if it is not required at work.
- Remove lock pin (2).
- Use crank (1) to adjust levelling bar height.
Adjust levelling bar according to:
• The soil conditions.
• The working depth.
The height adjustment is correct when the soil
flow hits the rear levelling bar. Make sure there is
enough clearance between the lower edge and
the ground to allow soil to move towards the
roller.
- Reinstall lock pin (2).
Adjust both sides to the same setting.
Optional equipment
69
8. Lighting and signalling
The machine can be fitted with specific signalling lights
to comply with the road regulations.
Kit no. 1238170
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Kit no. 1238950: Signalling equipment specific to Italy.
9. Front semi-automatic linkage
Kit no. 1237950:
Category 2 linkage.
This equipment is not recommended when the
power harrow is used in combination with a seed
drill.
Kit no. 1237960:
Category 3 linkage.
70
Optional equipment
10. Adaptation parts for VENTA LC
Kit no. 1286369
This equipment enables integrating a VENTA LC seed
drill to the machine.
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11. Adaptation parts for VENTA AL and VENTA TI
This equipment enables integrating a VENTA AL or
VENTA TI to the machine.
Kit no. 1286168
- Floating adaptation guided by the roller.
Kit no. 1286267
- Rigid adaptation.
Optional equipment
71
12. Adaptation parts for INTEGRA
This equipment enables integrating a INTEGRA seed
drill to the machine.
Kit no. 1616350
- Floating adaptation guided by the roller (Packer PK2
roller and Maxipacker roller).
Kit no. 1616363
- Floating adaptation guided by the roller (Packliner
roller).
Kit no. 1616373
- Rigid adaptation.
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72
Optional equipment
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.
1. Frequency chart
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$MAINTENANCE AND STORAGE
Oil change:
- Gearbox.
Grease:
- Roller bearing housings.
After the first
10 hours of
use
Every 20
hours
Every 100
hours
33
3
Maintenance and storage
73
2. Cleaning the machine
Check regularly that there are no foreign
objects wrapped around the blade
holder(twine, wire, crop residues,...). To
prevent premature bearing housing wear,
remove foreign bodies wrapped around
them.
- Regularly check side deflectors.
- Regularly clean roller and roller scraper bar:
In case of clogging, pivot scraper crossbar:
Packer PK2 roller: (a)
• Unscrew the 4 nuts (1).
• Remove the 2 tensioning devices (2).
• Slide lever in sleeves (3).
• Pivot scraper bar using lever.
• Clean and reassemble the unit.
Tightening torque: (1) 22 daN m (162 lbf ft).
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Maxipacker roller: (b)
• Unscrew the 6 nuts (1).
• Remove the 2 tensioning devices (2).
• Slide lever in sleeves (3).
• Pivot scraper bar using lever.
• Clean and reassemble the unit.
Tightening torque: (1) 22 daN m (162 lbf ft).
74
Maintenance and storage
3. Lubrication
Except for the secondary PTO shaft lubrication, the
machine must be placed in transport position for all
maintenance operations.
Clean grease nipples before greasing.
Lubricate with SHELL multi-purpose grease
grade NLGI 2.
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Primary PTO shaft
Every 250 hours or at the end of the season:
- U-joints (1).
- Transmission tube:
It is necessary to grease the 2 greaser zerks
(2) (Slide the black collar).
- guide rings (3):
• Unlock and slide guards for easier greasing of the
pto shaft u-joints and guiding bushes.
The 2 half-PTO shafts are separated:
- Transmission tube (The two grease nipples (2)).
In intensive use with tractors of maximum
authorized power, it is recommended to
grease at closer intervals (Interval of 100 to
150 hours).
Maintenance and storage
75
Trough
The trough is lubricated for life with
23 kg (50.7 lb) of grade NLGI 0 extreme
pressure SHELL ALVANIA WR0 semi-fluid
grease.
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76
Maintenance and storage
Draining:
Gearbox HR303D
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The gearbox is lubricated with 6 L (1.58 US gal) of SHELL SPIRAX A extreme-pressure gear oil with
viscosity grade 80W90 and API grade GL5.
When draining it is recommended to use:
For normal use:
- A mineral base oil with viscosity grade SAE 80W90 or 85W140 and API grade GL5
For intensive use:
- A synthetic base oil, type PAO (Poly-Alpha-Olefins) with a viscosity grade equivalent to
Power harrows
HR303D/M
(SHELL SPIRAX A 80W90 or SHELL SPIRAX A 85W140).
SAE 80W90 or 85W140 and API grade GL5 (SHELL SPIRAX ASX 75W90).
- Lower the tractor three-point linkage to rest the
machine on the ground.
- Increase top link length to tilt the machine rearwards.
- Place a container of sufficient capacity under drain
plug (3).
- Remove filler plug (1) and its washer.
- Remove drain plug (3) and its washer.
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reinstall drain plug (3) and its washer.
Replace if necessary.
- Adjust the top link length so that the machine is
horizontal with regards to the ground.
- Pour the correct oil quantity and quality through the
opening of the filler plug (1).
- Clean and reinstall filler plug (1) and its washer.
Replace if necessary.
Checking the oil level:
- Place the machine on flat horizontal ground.
- Remove level plug (2).
• The oil level must reach hole lower part (2).
- Clean and reinstall drain plug (2).
Maintenance and storage
77
Power harrows
HR303D/M
Gearbox HR303M
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The gearbox is lubricated with 8 L (2.11 US gal) of SHELL SPIRAX A extreme-pressure gear oil with
viscosity grade 80W90 and API grade GL5.
When draining it is recommended to use:
For normal use:
- A mineral base oil with viscosity grade SAE 80W90 or 85W140 and API grade GL5
(SHELL SPIRAX A 80W90 or SHELL SPIRAX A 85W140).
For intensive use:
- A synthetic base oil, type PAO (Poly-Alpha-Olefins) with a viscosity grade equivalent to
SAE 80W90 or 85W140 and API grade GL5 (SHELL SPIRAX ASX 75W90).
- Lower the tractor three-point linkage to rest the
machine on the ground.
- Increase top link length to tilt the machine rearwards.
- Place a container of sufficient capacity under drain
plug (3).
- Remove filler plug (1) and its washer.
- Remove drain plug (3) and its washer.
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reinstall drain plug (3) and its washer.
Replace if necessary.
- Adjust the top link length so that the machine is
horizontal with regards to the ground.
- Pour the correct oil quantity and quality through the
opening of the filler plug (1).
- Clean and reinstall filler plug (1) and its washer.
Replace if necessary.
Checking the oil level:
- Place the machine on flat horizontal ground.
- Remove level plug (2).
• The oil level must reach hole lower part (2).
- Clean and reinstall drain plug (2).
78
Maintenance and storage
Grease:
- Roller bearing housings.
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HR303D/M
4. Maintenance
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.
Gearbox oil level check
Check oil level and top up if necessary.
Check that there are no oil leaks on the central gearbox.
Maintenance and storage
79
Checking the blades and their mounting
hardware
Immediately replace worn or damaged parts with
genuine KUHN parts.
Blades
Replace blades in the following cases:
- When the degree of wear L reaches 150 mm (6’’).
- When there is visible warping.
Using blades that are excessively worn can
cause premature damage to holders, rotors or
troughs.
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HR303D/M
Check regularly that there are no foreign
objects wrapped around the blade
holder(twine, wire, crop residues,...). Remove
them.
80
Maintenance and storage
Blade replacement
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
- Clean the blade holder to clear the lynch pin.
- Pivot lynch pin ring using unlocking key supplied with
the machine (Part no. 52598210).
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HR303D/M
- Remove lynch pin (1).
- Remove connecting piece (2).
Maintenance and storage
81
- Replace worn blades.
Blade rotating to the left (2):
- Standard blade: (Part no. K2500090).
- OPTIMIX blade: (Part no. K2501120).
- DURAKUHN blade: (Part no. K2502240).
Blade rotating to the right (1):
- Standard blade: (Part no. K2500100).
- OPTIMIX blade: (Part no. K2501130).
- DURAKUHN blade: (Part no. K2502250).
Power harrows
HR303D/M
Rotor direction of rotation:
- Reassemble the unit.
- Check the condition of the lynch pin (replace it if
necessary) Part no. 50086310.
- Proceed same way on each rotor.
Fixing elements
Check the condition of the lynch pins after each blade
replacement. replace them if necessary.
Replace lynch pins every 2 or 3 blade replacement.
82
Maintenance and storage
Oil seal replacement
Before removing the blade holder, mark
initial direction to enable reinstalling it in the
original position.
Never remove several blade holders at the
same time.
Blade holder position
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HR303D/M
Maintenance and storage
83
- Clean the blade holder to clear the lynch pin.
- Pivot lynch pin ring using unlocking key supplied with
the machine (Part no. 52598210).
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HR303D/M
- Remove lynch pin (1).
- Remove connecting piece (2).
- Loosen screw (3).
- Remove washer (4).
- Remove blades (5).
- Remove blade holder (6).
- Remove oil seal (7) using a screwdriver.
84
Maintenance and storage
- Clean and lubricate oil seal housing.
- Fit new oil seal using special tool (8)
(Part no. K2501870).
The oil seal is in place when tool (8) bottoms
against input shaft (9).
Respect oil seal mounting direction.
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HR303D/M
- Grease the input shaft before reassembling all
components.
- Torque screw (3) to: 30 daN m (221 lbf ft).
Maintenance and storage
85
5. Storage
At the end of each season
- Clean the machine with a spray gun.
- Check and replace worn or damaged blades.
- Check and replace worn or damaged scraper plates.
- Touch up paint if necessary.
- Put the machine under cover in a dry place.
- Remove and service the PTO shaft. Follow the
instructions in the PTO shaft's operator's manual.
At the start of each season
- Read through the operator's manual again.
- Check that all nuts and bolts are sufficiently tightened.
- Make sure that all protection devices are in place and
good condition.
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HR303D/M
86
Maintenance and storage
Power harrows
$TROUBLE SHOOTING GUIDE
-
Problem Cause Remedy
Noisy drive when lifting the
machine
Noisy drive during work
Excessive power requirement
Tilth produced is too coarse
Tilth produced is too fine
Ridging at the side of the
machine
Excessive wear on blades and
blade holders
Top link of 3-point hitch badly
positioned/adjusted
Excessive lifting height Limit the lift linkage stroke
Machine tilted to the front or
rear (excessive pitch angle)
Insufficient machine side to
side stabilization
Working depth too deep
Rotor speed too high
Excessive ground speed Reduce ground speed
Incorrect setting of the rear
levelling bar
Considerable build-up of long
plant residues around the
blades
Excessive ground speed Reduce ground speed
Rotor speed too low
No levelling bar
Rotor speed too high
Forward speed is too slow Increase forward speed
Rear levelling bar is too low
Anti-ridging plate incorrectly
positioned on the side
deflectors
PTO speed is too high Reduce PTO speed
Levelling bar mounted at the
rear
Position top link parallel to
lower linkage arms
Lengthen or shorten top link to
set the machine horizontally
during work. (Tractor pto shaft
end and machine input shaft
must be parallel)
Use lower linkage arm
stabilizers
Reduce working depth by
means of the roller
Reduce speed by changing
gearwheels in the gearbox.
(optional gearwheel sets)
Raise or remove the levelling
bar
Eliminate plant residues
Increase speed by changing
gearwheels in the gearbox.
(optional gearwheel sets)
Install levelling bar, preferably
to the rear
Reduce speed by changing
gearwheels in the gearbox.
(optional gearwheel sets)
Raise or remove the levelling
bar
Position each anti-ridging plate
as close as possible to the
ground and roller
Remove rear levelling bar if not
required by working conditions
HR303D/M
Trouble shooting guide
87
Power harrows
HR303D/M
Machine clogging due to
ground build up between rotors
and levelling bars
Clogging of the Maxicrumbler
roller
Incorrect Packer roller
functioning (clogging, jamming
or soil build-up)
Crumbler roller clogging
Rear levelling bar mounted in
wet conditions
Wet conditions, too high load
on the roller
Incorrectly adjusted or worn out
scraper plates
Scrapers jammed by trash
Scraper bar incorrectly
positioned
Wet conditions, too high load
on the roller
Remove rear levelling bar
use Packer PK2 roller or
Maxipacker roller
Adjust each scraper plate
Clean scrapers by pivoting
them rearwards
Scraper bars must always be in
the furtherst forward position.
Wear compensation can only
be obtained by sliding the
scraper plates forward
individually
Remove Crumbler roller
removable bars.
use Packer PK2 roller or
Maxipacker roller
88
Trouble shooting guide
$LIMITED WARRANTY
Power harrows
HR303D/M
Limited warranty
89
Power harrows
HR303D/M
90
Limited warranty
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