KUHN GMD 3150 TL CE User manual

Original instructions
7N136AGB-A
Read carefully before starting the machine
OPERATOR'S MANUAL
Disk mower
A0001 >
GMD 3150/3550/4050 TL CE
7N136AGB-A - English - 06-2016
*7N136AGB_A*

1. - Dear Owner
GMD 3150/3550/4050 TL CE
1
7N136AGB-A
Disk mower
1. Dear Owner
Copyright 2016 KUHN
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
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. 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 highlyon the conditions of use (products to handle, soil, weather
conditions, etc...).
Designated use of the machine
The GMD 3150/3550/4050 TL mower must only be used for the purpose for which it was manufactured:
mowing on the ground of hay fields, grass silage fields and improved pastures for the purpose of harvesting
fodder for feeding livestock.

GMD 3150/3550/4050 TL CE
22. - Contents
7N136AGB-A
Disk mower
2. Contents
1. Dear Owner .....................................................................................................................1
2. Contents..........................................................................................................................2
3. Identification of the machine.........................................................................................4
3.1 Front view ........................................................................................................................................ 4
3.2 Rear view......................................................................................................................................... 4
3.3 Model identification plate .................................................................................................................5
3.4 Optional equipment.......................................................................................................................... 5
4. Safety...............................................................................................................................6
4.1 Description of symbols used in this document.................................................................................6
4.2 Safety instructions ........................................................................................................................... 7
4.3 Location and description of safety decals on the machine ............................................................ 16
4.4 Road safety equipment and recommendations ............................................................................. 19
5. Machine specifications................................................................................................20
5.1 Description and glossary ...............................................................................................................20
5.2 Technical specifications ................................................................................................................. 22
5.3 Required equipment ...................................................................................................................... 24
5.4 Sound levels ..................................................................................................................................24
6. Putting into service......................................................................................................25
6.1 Coupling and uncoupling ...............................................................................................................25
6.1.1 2-point hitch...................................................................................................................... 26
6.1.2 Hydraulic connections ......................................................................................................30
6.1.3 Electrical connections.......................................................................................................30
6.1.4 Primary PTO shaft............................................................................................................31
6.1.5 Secondary PTO shaft ....................................................................................................... 31
7. Instructions for transport ............................................................................................33
7.1 Putting the machine into transport position....................................................................................33
7.2 Conformity with the road regulations .............................................................................................34

2. - Contents
GMD 3150/3550/4050 TL CE
3
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8. Instructions for work................................................................................................... 35
8.1 Putting the machine into work position.......................................................................................... 35
8.2 Adjustments in working position .................................................................................................... 36
8.2.1 Cutting height................................................................................................................... 36
8.2.2 Reduced or increased ground pressure........................................................................... 40
8.3 Machine use .................................................................................................................................. 42
9. Optional equipment..................................................................................................... 43
9.1 Raised skid shoes ......................................................................................................................... 43
9.2 Secondary PTO shaft with CE shielding........................................................................................43
9.3 Secondary PTO shaft with constant velocity joint and CE shielding.............................................. 43
9.4 2-point hitch................................................................................................................................... 44
9.5 Rock guard.................................................................................................................................... 44
9.6 1000 RPM...................................................................................................................................... 44
9.7 8 spline PTO kit ............................................................................................................................. 44
10. Maintenance and storage............................................................................................ 45
10.1 Frequency chart............................................................................................................................. 45
10.2 Cleaning the machine.................................................................................................................... 46
10.3 Lubrication..................................................................................................................................... 47
10.3.1 PTO shaft ......................................................................................................................... 47
10.3.2 Grease the tongue pivot point (1)..................................................................................... 48
10.3.3 Cutterbar draining and refilling ......................................................................................... 49
10.3.4 Checking cutterbar oil level..............................................................................................51
10.3.5 90 degree gearbox draining ............................................................................................. 52
10.3.6 Draining the Gyrodine gearbox ........................................................................................ 53
10.4 Maintenance.................................................................................................................................. 54
10.4.1 Inspection of knives and securing elements..................................................................... 54
10.4.2 Knife replacement ............................................................................................................ 57
10.4.3 Disc replacement.............................................................................................................. 57
10.4.4 Outer and inner cones...................................................................................................... 60
10.5 Storage.......................................................................................................................................... 61
11. Troubleshooting guide................................................................................................ 62
12. Limited Warranty.......................................................................................................... 63

GMD 3150/3550/4050 TL CE
43. - Identification of the machine
7N136AGB-A
Disk mower
3. Identification of the machine
3.1 Front view
3.2 Rear view

3. - Identification of the machine
GMD 3150/3550/4050 TL CE
5
7N136AGB-A
Disk mower
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.
Type: GMD 3150/3550/4050 TL CE
Serial no.:
3.4 Optional equipment
Tick box corresponding to the equipment fitted on
your machine:
KUHN NORTH AMERICA, INC.
MADE IN USA
MODEL No. SERIAL No.
BRODHEAD, WI 53520
Kit no. 1066310: Raised skid shoes
Kit no. 18968217: Secondary PTO shaft with CE shielding
Kit no. 18968218: Secondary PTO shaft with constant velocity joint and CE shielding
Kit no. 18968056: 2-point hitch
Kit no. 18968053: Rock guard 3150
Kit no. 18968054: Rock guard 3550
Kit no. 18968055: Rock guard 4050
Kit no. 18968025: 1000 RPM
Kit no. 18968216: 8 spline PTO kit

GMD 3150/3550/4050 TL CE
64. - Safety
7N136AGB-A
Disk mower
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.
Thissymbol is used toidentify 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
GMD 3150/3550/4050 TL CE
7
7N136AGB-A
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4.2 Safety instructions
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.
Safety shutdown procedure
Before adjusting, maintaining or repairing the
machine, depressurize hydraulics, turn off the
engine, remove ignition key and wait until all moving
parts have come to a complete stop.
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 liablefor 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.

GMD 3150/3550/4050 TL CE
84. - Safety
7N136AGB-A
Disk mower
Precautions to take before using the
machine
Do not wear loose clothing which could become
caught up in moving parts.
Wear appropriate protective clothing (gloves,
shoes, goggles, hearing protection, 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.
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 beadapted 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. - Safety
GMD 3150/3550/4050 TL CE
9
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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
applicable regulations for special transportation 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 exceeded.
If the machine is over the maximum legal weight,
follow the applicable regulations for special
transportation of oversize equipment.
The front axle load (1) must never, under any
circumstances, be less than 20% of the tractor's
unladen weight. If necessary, add ballast weights to
the front or to the rear to preserve the steering and
braking efficiency.
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.
Maximum speed
Always keep to the legal speed limit for driving a
tractor-machine assembly on public roads.
Always obey current regulations for driving
on roads.
kg
lb
kg
lb
1
The maximum speed for transport of this
machine is 20 mph (32 kmh).
30
km/h
Q
8
0
5
2
7
8
0

GMD 3150/3550/4050 TL CE
10 4. - Safety
7N136AGB-A
Disk mower
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 three point linkage.
Do not stand between the tractor and the machine
without ensuring that the parking brake is applied.
Hydraulic circuit
Caution! The hydraulic circuit is under high
pressure. Maximum pressure at work: 200 bar.
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 check the hydraulic hoses. Anyway, 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 causesevere
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.

4. - Safety
GMD 3150/3550/4050 TL CE
11
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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.
Any worn or damaged guards 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 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
rotation are in line with the machine manufacturer'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.
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.

GMD 3150/3550/4050 TL CE
12 4. - Safety
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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 areoperated by hydraulic or pneumatic
controls. Keep away from these danger zones.
Tyres
Regularly check the tyre pressure. Respect
manufacturers' recommendations on pressure.
Assembly, disassembly and repair of wheels and
tyres must only be carried out by competentpersons
who are equipped with standardized tools. Before
any work is performed on the wheels, ensure that
the machine rests on the ground and is perfectly
stable so that it cannot move accidentally (put
chocks in place).
Safety decals
Safety warning decals are placed in pictorial form on
various parts of the machine. They are there to warn
you of potential dangers and to tell you how to avoid
accidents.
Always keep the safety decals clean and legible,
and replace them when they are worn, damaged,
missing or illegible.
Waste disposal
Respect the environment! Never spill pollutants (oil,
grease, filters, etc.) on the ground, never pour them
down the drain and never discard them in any other
place where they could pollute the environment.
Never throw away or burn a tyre. Always take waste
to specialized recycling or waste disposal centers.

4. - Safety
GMD 3150/3550/4050 TL CE
13
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Precautions for maintenance and repair
work
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, always
perform the safety shutdown procedure.
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 appropriate protective clothing (gloves,
shoes, goggles, hearing protection, 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.
It is strongly recommended to have your machine
checked by your Kuhn dealer after each season,
especially tools and their attaching hardware.

GMD 3150/3550/4050 TL CE
14 4. - Safety
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Projection of stones and foreign objects
For driver safety, always use a tractor equipped with
a cab. Keep the ground to mow free of foreign
bodies. Avoid mowing on stony or rocky grounds. If
this is not possible, take extra safety precautions,
such as
- Fit polycarbonate screens inside the tractor cab's
side and rear windows, or install narrow mesh
guards on their exterior.
- Increase the cutting height to avoid contact with
stones or rocks.
Never start a mower/mower conditioner when other
people are close.
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 considerabledistance. Keep all persons
and animals away from the danger zone.
The protection covers help reduce risks of
projections. Therefore, make sure that all mower
protection devices are in place and good condition
prior to using the machine.
Regularly check the condition of the protection
covers. Immediately replace any worn, damaged, or
missing cover.

4. - Safety
GMD 3150/3550/4050 TL CE
15
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Precautions for machine use
After each use, check the cutting tools (discs,
knives) and their attachment hardware in
accordance with the instructions given in the
present manual. Immediately replace any worn,
damaged or missing cutting tool or element. To do
this, use the tool outfit supplied with the machine.
For your safety, only use genuine parts !
Regularly check the condition of the protection
covers. Immediately replace any worn, damaged, or
missing cover. Before engaging the PTO, rest the
cutterbar on the ground. 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, cuttings tools can
continue rotating for some time. Stay away from the
machine until all moving parts have come to a
complete standstill.
If the machine hits an obstacle, 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.

GMD 3150/3550/4050 TL CE
16 4. - Safety
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4.3 Location and description of safety
decals on the machine
Location of safety decals
20
mile/h
20
mile/h
1 2 3
3
7
8
4
6
6
64 3
3 5
59900300
59900300
59900600
30
km/h
Q
8
0
5
2
7
8
0

4. - Safety
GMD 3150/3550/4050 TL CE
17
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Description of safety decals
CAUTION Operating Instructions (1)
The operators' manual contains all the information
necessary for using the machine safely. It is
imperative to read and comply with all instructions.
CAUTION Perform safety shutdown procedure
(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.
WARNING Projections (3)
Stones and other debris projected by the moving
parts can travel a long distance. The protection
covers must always be in position and in good
condition. Always stay at a safe distance from the
machine.
CAUTION Crushing Hazard (4)
Never operate in an area where there is a crushing
risk before all moving parts have come to a
complete stop.
59900300

GMD 3150/3550/4050 TL CE
18 4. - Safety
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WARNING Crushing Hazard (5)
Stay a safe distance from the machine. Crushing
hazard.
WARNING Rotating cutting tools (6)
Keep away from the mower knives while engine is
running, the PTO drive is engaged, and until all
moving parts have come to a complete stop.
CAUTION Do not step on the machine (7)
Do not step on the machine : Risk of falling or
damaging the protection device.
Speed identification symbol (8)
59900600
30
km/h
Q
8
0
5
2
7
8
0