KUHN HRB 122 User manual

Original instructions
KN135HGB_D
Read carefully before starting the machine
Operator's manual
Power harrows
H0001 > H9999
HRB122-152-182
KN135HGB_D - English - 04-2019
*KN135HGB_D*

1. - Dear Owner
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1. Dear Owner
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 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
andcarefullyinspectedinthesamefactorythatbuilds the machineto assure high quality and accurate fitting
of any necessary replacements.
About improvements
We are continually striving to improve our products. We therefore reserve 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.
Wear parts
Wearing parts fitted on our machines have been tested in very different situations to optimize their service
life. Nevertheless, the service life depends highly on the conditions of use (products to handle, soil, weather
conditions, etc...).
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.
Copyright 2019 KUHN

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42. - Contents
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2. Contents
1. Dear Owner .....................................................................................................................3
2. Contents..........................................................................................................................4
3. Identification of the machine.........................................................................................7
3.1 Front view ........................................................................................................................................ 7
3.2 Rear view......................................................................................................................................... 7
3.3 Model identification plate ................................................................................................................. 8
3.4 Optional equipment.......................................................................................................................... 9
4. Safety.............................................................................................................................10
4.1 Description of symbols used in this document...............................................................................10
4.2 Safety instructions ..........................................................................................................................11
4.2.1 Introduction........................................................................................................................11
4.2.2 Read and follow the safety instructions.............................................................................11
4.2.3 Precautions to be taken before carrying out any operations on the machine................... 12
4.2.4 Burn hazard......................................................................................................................12
4.2.5 Precautions when coupling...............................................................................................12
4.2.6 Precautions when driving ................................................................................................. 13
4.2.7 Precautions to take before using the machine ................................................................. 13
4.2.8 Hydraulic circuit................................................................................................................ 14
4.2.9 Precautions when driving on public roads........................................................................ 15
4.2.10 Maximum speed...............................................................................................................18
4.2.11 PTO shaft.......................................................................................................................... 19
4.2.12 Precautions during manoeuvres....................................................................................... 20
4.2.13 Remote controlled components........................................................................................21
4.2.14 Safety decals....................................................................................................................21
4.2.15 Waste disposal .................................................................................................................21
4.2.16 Precautions for maintenance and repair work.................................................................. 22
4.2.17 Precautions to take before using the parking stands........................................................ 22
4.2.18 Projection of stones and foreign objects........................................................................... 23
4.2.19 Precautions for machine use............................................................................................ 23
4.3 Location and description of safety decals on the machine ............................................................ 24
4.3.1 Location of safety decals..................................................................................................24
4.3.2 Description of safety decals.............................................................................................. 25
4.4 Road safety equipment and recommendations ............................................................................. 27
4.5 Likely critical failures...................................................................................................................... 28
4.6 Incorrect use of the machine by the user....................................................................................... 28
4.7 Limit state criteria........................................................................................................................... 28

2. - Contents
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5. Machine specifications................................................................................................ 29
5.1 Description and glossary ............................................................................................................... 29
5.1.1 Designated use of the machine........................................................................................ 30
5.2 Technical specifications................................................................................................................. 30
5.2.1 Designated parameters.................................................................................................... 30
5.3 Required equipment...................................................................................................................... 31
5.3.1 Power harrow blades........................................................................................................31
5.3.2 Crumbler roller.................................................................................................................. 31
5.3.3 Depth control.................................................................................................................... 32
5.4 Sound levels.................................................................................................................................. 32
6. Putting into service...................................................................................................... 34
6.1 Coupling and uncoupling............................................................................................................... 34
6.1.1 Description of coupling elements ..................................................................................... 34
6.1.2 Preparing the tractor......................................................................................................... 34
6.1.3 Preparing the machine..................................................................................................... 36
6.1.4 Primary PTO shaft............................................................................................................ 42
6.1.5 Shear bolt torque limiter................................................................................................... 44
6.1.6 PTO output on angle gearbox.......................................................................................... 45
6.1.7 Machine adjustment.........................................................................................................46
6.1.8 Adjusting the side deflectors ............................................................................................ 46
6.1.9 Roller rear offset adjustment ............................................................................................ 47
6.1.10 Crumbler roller adjustment............................................................................................... 49
6.1.11 Uncoupling the machine................................................................................................... 50
6.1.12 Handling........................................................................................................................... 51
7. Instructions for transport............................................................................................ 52
7.1 Putting the machine into transport position ................................................................................... 52
7.2 Conformity with the road regulations............................................................................................. 52
7.3 Machine transport using transport means ..................................................................................... 53
8. Instructions for work................................................................................................... 54
8.1 Putting the machine into work position.......................................................................................... 54
8.2 Adjustments in working position .................................................................................................... 55
8.2.1 Rotor speed...................................................................................................................... 55
8.2.2 Working depth.................................................................................................................. 56
8.3 Machine use .................................................................................................................................. 57
8.3.1 Drive speed...................................................................................................................... 58
9. Optional equipment..................................................................................................... 59
9.1 Lighting and signalling................................................................................................................... 59
9.2 Lateral signalling equipment.......................................................................................................... 60

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10. Maintenance and storage ............................................................................................61
10.1 Frequency chart............................................................................................................................. 61
10.2 Cleaning the machine....................................................................................................................62
10.3 Lubrication .....................................................................................................................................62
10.3.1 Primary PTO shaft............................................................................................................63
10.3.2 Trough ..............................................................................................................................64
10.3.3 Draining............................................................................................................................64
10.3.4 Grease..............................................................................................................................65
10.4 Maintenance .................................................................................................................................. 66
10.4.1 Checking the angle gearbox oil level................................................................................ 66
10.4.2 Checking the blades and their mounting hardware .......................................................... 67
10.5 Storage .......................................................................................................................................... 69
10.5.1 At the end of each season................................................................................................ 69
10.5.2 At the start of each season...............................................................................................69
10.5.3 Storage............................................................................................................................. 70
10.6 Dismantling and scrapping of the machine....................................................................................70
11. Troubleshooting guide.................................................................................................71
12. Appendix.......................................................................................................................72
12.1 Calculating the load on an axle...................................................................................................... 72
13. Limited Warranty ..........................................................................................................80

3. - Identification of the machine
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3. Identification of the machine
3.1 Front view
3.2 Rear view

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83. - Identification of the machine
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3.3 Model identification plate
- Please write below the type and serial number of
the machine. This information is to be given to the
Kuhn authorized dealer for any spare parts order
or warranty claim.
• (1) The manufacturer:
• (2) Type:
• (3) Serial Number:
• (4) Weight:
According to the country of destination,
additional plates can be fitted on the
machine.
For machines aimed at countries which are
members of the European Union (EC marking):
• (5) Manufacturing year:
For machines aimed at countries member of the
Eurasian customs union (EAC marking):
• (6) Model year:
• (7) Manufacturing year:
TYPE
MASSEkg
KUHN S.A.
67700SAVERNE-FRANCE
N°
MADEINFRANCE
TYPE
MASSE kg
KUHN S.A.
67700 SAVERNE - FRANCE
N°
MADE IN FRANCE
1
3
2
4
5
09993600
25: Year of Construction
0000
00/0000
26: Model Year
7
6

3. - Identification of the machine
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3.4 Optional equipment
- Tick box corresponding to the equipment fitted on
your machine:
Lighting and signalling: Device with a single signalling panel.
Lighting and signalling: Device with 2 signalling panels.
Lateral signalling equipment.

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4. Safety
4.1 Description of symbols used in
this document
This symbol indicates a potentially hazardous
situation that if not avoided, could result in serious
bodily injury.
Thissymbolis usedto 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.

4. - Safety
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4.2 Safety instructions
4.2.1 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 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 accident resulting from machine modifications
carried out by the operator himself or by a third party
without previous written agreement from the
manufacturer.
4.2.2 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
any parts of this manual, please contact your
KUHN dealer.

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4.2.3 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.
4.2.4 Burn hazard
The outer surface of some parts can reach high
temperatures and cause burns in case of contact.
- Remain particularly cautious when working next to
hot surfaces.
- Wear protective gloves.
- If possible, let the machine cool down before
proceeding with any adjustment, maintenance or
repair work.
4.2.5 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.
- Do not stand between the machine lower hitching
points or between the tractor lower hitching points
during coupling maneuvers.
- Never stand between the tractor and the machine
when operating the three point linkage.
- Do not stand between the machine and the tractor
or on the machine without having first applied the
tractor parking brake andplaced the gearbox in the
neutral position.

4. - Safety
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4.2.6 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 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.
4.2.7 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.

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4.2.8 Hydraulic circuit
Caution! The hydraulic circuit is under high
pressure. Maximum pressure at work: 200 bar
(2901 psi).
- Before connecting hoses to the tractor hydraulics,
ensure that tractor and machine circuits are not
under pressure. Before disconnecting a hose,
depressurize the hydraulic circuit.
- To avoid making incorrect connections, mark
hydraulic couplers and corresponding hoses with
colors. WARNING! Functions could be reversed
(for example: lift/lower) and cause accidents.
- Regularly make visual inspection to check if
hydraulic hoses are damaged or worn. In case of
normal wear, the hydraulic hoses must be
replaced every 5 years. Damaged or worn hoses
must immediately be replaced. When replacing the
hydraulic hoses, only use hoses with the
specification recommended by the manufacturer of
the machine.
- To locate a leak, use appropriate means. Protect
body and hands from liquid under pressure.
- Any liquid under pressure (particularly oil from
hydraulics) can penetrate the skin and cause
severe injury. If injured, see a doctor immediately,
there could be danger of infection.
- Before any adjustments, maintenance or repairs
are carried out, lower the machine to the ground,
depressurize the hydraulics, turn off the engine,
remove ignition key and wait until all moving parts
have come to a complete stop.

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4.2.9 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.
For machines with hoppers or tanks:
- If the total weight exceeds the machine's total
gross weight, empty the hopper to travel on
public roads.
- In any case, we recommend to travel on public
roads with empty hoppers and tanks.
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 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.

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Gross weight and weight per axle
Description of symbols
The drawings are not legally binding, their only aim is to illustrate the method to use.
Prior to driving on public roads, check that all criteria are met to be in conformity with the
countrie's regulations:
- When coupling a tool to the front and/or rear 3-point lift linkage, the maximum authorized
payload must not be exceeded.
- When coupling tools to the front and/or rear 3-point lift linkages, the maximum load on
tractor's tires must not be exceeded.
- The load on the tractor front axle must always represent 20 % of the tractor unladen
weight.
For machines with hoppers or tanks:
- If the total unit weight exceeds the tractor Gross Combined Weight Rating in accordance with
the countrie's legislation, empty the hopper to travel on public roads.
- In any case, we recommend to travel on public roads with empty hoppers and tanks.
Description Units Description
T kg Tractor unladen weight
PTAC kg Gross Combined Weight Rating
T1 kg Unladen load on tractor front axle
T2 kg Empty load on tractor rear axle
t kg Axle loads (Tractor + machine)
t1 kg Load on front axle (Tractor + machine)
t2 kg Load on rear axle (Tractor + machine)
t1 max kg Maximum load authorized on the tractor front axle according to the tires
t2 max kg Maximum load authorized on the tractor rear axle according to the tires
M1 kg Total weight of front tool or front ballast

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How to proceed:
Stage 1:
Stage 2:
To measure:
- Tractor tare (T).
T = _____kg
T = ________ kg
- Couple the machine to the tractor.
To measure:
- Load on front axle (t1):
• Tractor + machine (transport position).
To do:
- If the front axle load (t1) is below 20% of the tractor
tare (T), add ballast weights (M1) to exceed the
minimum load on the front axle.
Example:
• (T) = 7500 kg (16535 lb).
• 20% of T = 1500 kg (3300 lb).
• (t1) = 700 kg (1545 lb).
• 700 kg (1545 lb) < 1500 kg (3300 lb).
• Add ballast weights until the minimum front axle
load is exceeded.
• Repeat checking procedure.
t1 = _____kg
t1 < 20% T
t1 < 20% T
t1
t1 ≥
20% T
20% T
t1 = ________ kg

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Stage 3:
Stage 4:
To measure:
- Total weight (t):
• Tractor + machine (transport position).
• Ballast weights.
Checking:
- To go to the next stage:
• Check in the tractor's operator's manual that the
value measured is below the tractor's Gross
Combined Weight Rating.
To do:
- If t < PTAC go to the next stage.
- If the total unit weight exceeds the tractor Gross
Combined Weight Rating in accordance with the
countrie's legislation, empty the hopper to travel on
public roads.
Example:
• (t) = 10000 kg (22046 lb).
• PTAC = 13000 kg (28660 lb).
• t < PTAC: Go to the next stage.
kgkg
t = _____kg
t = ________ kg
To measure:
- Load on rear axle (t2):
• Tractor + machine (transport position).
• Ballast weights.
Checking:
- Check in the tractor's operator's manual that the
value measured is below the maximum allowed
tractor rear axle load.
- Check that tyre and rim specifiations are in
conformity with the requirements of the tractor
manufacturer.
Example:
• Load on rear axle (t2) = 8500 kg (18740 lb).
• Check in the tractor's operator's manual that the
value measured is below the maximum allowed
tractor rear axle load.
• Check that tyre and rim specifiations are in
conformity with the requirements of the tractor
manufacturer.
4.2.10 Maximum speed
- Always keep to the legal speed limit for driving a
tractor-machine assembly on public roads.
kgkg
t2 = _____kg
t2 > t2 max
t2 > t2 max
t2
t2 ≤
t2 max
t2 max
t2 = ________ kg

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4.2.11 PTO shaft
- Use only PTO shafts supplied with the machine or
recommended by the machine manufacturer.
- The protective shield of the tractor PTO stub, the
PTO shaft guards and the protective shield 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. Check that the
PTO shaft guard can turn freely a full rotation
independent of the shaft.
- Any worn or damaged guards must be replaced
immediately. A worn guard or an unprotected PTO
shaftcan causea seriousor evena lethalaccident.
- 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 to come to a
complete stop.
- If the primary PTO shaft is equipped with a torque
limiter 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 direction of
rotationare inline withthe machinemanufacturer's
recommendations.
- Before engaging the PTO drive, make sure that
there are no people or animals near the machine.
Never engage the PTO drive when the tractor
engine is stopped.

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- Do not install any adapter device that results in a
portion of the tractor PTO stub, the rotating PTO
shaft, or the adapter to be unguarded. The tractor
master shield shall overlap the end of the splined
shaft and the added adaptor device as outlined in
the table.
A
PTO type Diameter X splines A ±5 mm (0.20’’)
1 35 mm (1.378’’) 6 85 mm (3.35’’)
236 mm (1.42’’) 885 mm (3.35’’)
3 35 mm (1.38’’) 21 85 mm (3.35’’)
445 mm (1.772’’) 20 100 mm (4.00’’)
5 44 mm (1.732’’) 6 100 mm (4.00’’)
- When uncoupling the machine, rest the PTO shaft
on the support specially provided, and replace
protective shield on the PTO stub of the tractor.
- Read and follow the instructions in the operator's
manual provided with the PTO shaft.
4.2.12 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.