OPERATOR'S MANUAL
KN084EGB E
Mower conditioner
ALTERNA400
KN084EGB E
- English - 11-2009
Mower conditioner
ALTERNA400
$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 th is manual
and apply this knowledge. Please DO NOT ASSUME YOU KNOW HOW TO OPERATE AND MAINTAIN YOUR
MACHINE before reading this manual carefully. KEEP THIS MANUAL AVAILABLE FOR REFERENCE. Pass
it on to the next owner if you re-sell the machine.
Your KUHN dealer can offer a complete line of genuine KUHN service parts. These parts ar e manufactured and
carefully inspected in the same factory that builds the machine to assure high quality and accurate fitting of any
necessary replacements.
About improvements
We are continually striving to improve our products. It therefore reserves the right to make improvements or
changes when it becomes practical to do so, without incurring any obligations to make changes or additions to
the equipment sold previously.
Designated use of the machine
The ALTERNA 400 mower conditioner must only be used for the work for which it has been designed: mowing
on the ground of hay fields, grass silage fields and improved pastures for the purpose of harvesting fodder for
feeding livestock.
Document illustrations
Most illustrations and photos pictured in this manual are based on a machine of type ALTERNA 500.
Dear Owner
1
Mower conditioner
ALTERNA400
$Contents
Dear Owner.....................................................................................................................1
Contents .........................................................................................................................2
Identification of the machine.........................................................................................4
Front view..........................................................................................................................................4
Model identification plate ................................................................................................................5
Optional equipment..........................................................................................................................5
Safety...............................................................................................................................6
Description of symbols used in this document.............................................................................6
Safety instructions...........................................................................................................................7
Location and description of safety decals on the machine .......................................................15
Road safety equipment and recommendations...........................................................................18
Machine specifications................................................................................................20
Description and glossary...............................................................................................................20
Technical specifications............. ... ... ... .... ... ... ... ... .... ............................................. ... ... .... ... ............22
Required equipment.......................................................................................................................23
Sound levels ......... ... ... .... ... ... ... .... ............................................. ......................................................24
Putting into service......................................................................................................25
Description of control elements....................................................................................................25
Coupling and uncoupling..............................................................................................................27
Instructions for transport............................................................................................41
Putting the machine into transport position................................................................................41
Conformity with the road regulations...........................................................................................43
2
Contents
Mower conditioner
ALTERNA400
Instructions for work...................................................................................................44
Putting the machine into work position............. ..........................................................................44
Adjustments in working position..................................................................................................45
Machine use....................................................................................................................................50
Optional equipment.....................................................................................................53
Yokes...............................................................................................................................................53
Maintenance and storage............................................................................................ 54
Frequency chart .............................................................................................................................54
Lubrication............................................................................................ ..........................................55
Maintenance....................................................................................................................................64
Storage............................................................................................................................................72
Trouble shooting guide...............................................................................................73
Limited warranty.......................................................................................................... 75
Contents
3
1. Front view
Mower conditioner
ALTERNA400
$Identification of the machine
4
Identification of the machine
2. 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.
Mower conditioner
ALTERNA400
Type: FC400
Serial no.:
3. Optional equipment
Part no. 4503710: 1 3/8’’ - 6 spline yoke.
Part no. 4503712: 1 3/4’’ - 6 spline yoke.
Part no. 4503713: 1 3/4’’ - 20 spline yoke.
Identification of the machine
5
$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.
Mower conditioner
ALTERNA400
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.
6
Safety
Mower conditioner
ALTERNA400
2. Safety instructions
Introduction
The machine must only be operated, maintained and repaired by competent persons who are familiar with
machines' specifications and operation and aware of safety regulations fo r preventing accidents.
The operator must imperatively respect safety instructions in this manual and in the warnings posted on the
machine. The operator is also obliged to respect current le gislation concerning accident prevention, wo rk safety
and public traffic circulation.
Designated use of the machine also means following operation, maintenance and repair recommendations
given by the manufacturer, and using only genuine spare parts, equipment a nd acce sso ries, as r ecom mended
by the manufacturer.
The manufacturer is not held liable for any damage resulting from machine applications other than those
specified by the manufacturer. Any use other than the designated operation is at the risk and responsibility of
the operator.
The manufacturer is not held liable for any damage or accident re sulting from machine modifications carried out
by the operator himself or by a third party without previous written agreement from the manufacturer.
Read and follow the safety instructions
Before using the machine, carefully read all the safety
instructions in this manual and the warnings placed on
the machine.
Before starting work, the operator must be familiar with
all machine controls, handling devices and their
functions. It is too late to learn once work has been
started!
Never let anyone operate the machine who is not traine d
to do so.
Should you have any difficulties in understanding certain
parts in this manual, please contact your KUHN dealer.
Precautions to be taken before carrying out
any operations on the machine
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key and
wait until all moving parts have come to a complete stop
and apply park brake.
Safety
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.
Mower conditioner
ALTERNA400
Precautions when driving
Tractor handling, stability, performance and braking
efficiency are all affected by weight distribution, trailed or
mounted implements, additional ballast and driving
conditions. It is therefore of great importance that the
operator exercises caution in every given situation.
Groundspeed must be adapted to ground conditions as
well as to roads and paths. Always avoid abrupt change s
of direction.
Be particularly cautious when turning corners, paying
attention to machine overhang, length, height and
weight.
Never use a narrow track tractor on very uneven or
steeply sloping ground.
Never leave the tractor seat while the machine is
operating.
Carrying people or animals on the machine when
working or in transport is strictly forbidden.
8
Safety
Precautions when driving on public roads
Dimensions
Depending on the dimensions of the machine, contact
the relevant authorities to ensure that it can be legally
transported on public roads.
If the machine is over the maximum legal size, follow the
local regulations for special transportation of oversize
equipment.
Gross weight and weight per axle
Check that the tractor's authorized gross weigh t as well
as its lift capacity and maximum weight per axle are not
exceeded.
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.
Mower conditioner
ALTERNA400
Transport position
Before transporting the machine on public roads, place
the machine into its transport position, according to the
instructions in this manual.
Lights and indicators
Before transporting the machine on public road s, ensure
that all legally required lightings and signallings are in
place.
Ensure that lightings and signallings are clean and in
good working order. Replace any missing or broken
equipment.
Always obey current regulations for driving
on roads.
Maximum speed
Always keep to the legal speed limit for driving a tractormachine assembly on public roads.
Safety
9
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
Mower conditioner
ALTERNA400
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. In case of normal
wear, replace the hydraulic hoses 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 appropr iate 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.
10
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 se cured 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 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 ma nual
provided with the PTO shaft.
Mower conditioner
ALTERNA400
Safety
11
Precautions during manoeuvres
When moving the machine from the transport positio n to
the working position and vice versa, make sure that
nobody is within the machine pivoting area.
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.
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 competent persons 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).
Mower conditioner
ALTERNA400
Safety decals
Safety warning decals are placed in pictorial form on
various parts of the machine. They are ther e to warn you
of potential dangers and to tell you how to avoid
accidents.
Always keep the safety decals clea n and readable, 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.
12
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 defenders,
etc.).
Do not solder, weld or use a blow torch near fluids under
pressure or inflammable products.
For your own safety and for correct machine operation,
only use original manufacturer parts.
It is strongly recommended to have your machine
checked by your Kuhn dealer after each season,
especially tools and their attaching hardware.
Mower conditioner
ALTERNA400
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 conditioner when other people are
close.
Safety
13
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.
The protection covers help reducing 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.
Immediatly replace any worn, damaged or missing
cover.
Precautions for machine use
After each use, check the cutting tools (discs, knives)
and their attachment hardwa re 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.
Immediatly 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.
Mower conditioner
ALTERNA400
14
Safety
3. Location and description of safety decals on the machine
Location of safety decals
Mower conditioner
ALTERNA400
Safety
15
Description of safety decals
Operating instructions (1)
The operators' manual contains all the information
necessary for using the machine safely. It is imperative
to read and comply with all instructions.
Working on the machine (2)
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key and
wait until all moving parts have come to a complete stop
and apply park brake.
Mower conditioner
ALTERNA400
Projections (3)
Stones and other debris pro jected by the moving parts
can travel a long distance. The protection covers must
always be in position and in good condition. Always sta y
at a safe distance from the machine.
Manoeuvring area (4)
Stay a safe distance from the machine. Crushing hazard.
16
Safety
Rotating cutting tools (5)
Keep away from the mower knives all the time the engine
is running, the PTO drive engaged and the moving parts
have not come to a complete stop.
Cutting tools (6)
The cutting tools and their attachment hardware meet
safety and reliability criteria set by standards and by the
manufacturer. For your own safety and for correct
machine operation, only use original manufacturer parts.
Mower conditioner
ALTERNA400
Safety
17
4. Road safety equipment and recommendations
The road safety equipment is mounted in the factory or
by your authorized Kuhn dealer according to current
safety regulations. Always keep to the legal speed limit
for driving a tractor-machine assembly on public roads.
Whatever the speed, we recommend, for everyones'
safety, not to exceed a maximum speed of 25 km/h.
The rear safety device comprises:
- 2 signalling lights (1)
(red light / stop light / turn signal light).
- 2 red reflectors (2).
- A signalling panel (3).
- A speed limit decal 4 supplied according to the
country where the machine is bound for.
Mower conditioner
ALTERNA400
The side device comprises:
• 4 amber reflectors (1).
• 4 amber reflectors (1)
18
Safety
Tyre pressure
Transport wheel tyre pressure:
- (a): 3 bar (44 psi).
- (b): 4 bar (58 psi).
Work wheel tyre pressure:
- (c): 1.8 bar (25 psi).
Mower conditioner
ALTERNA400
Instructions specific to France
Speed
Always keep to the legal speed limit of 25 km/h for
driving a tractor-machine assembly on public roads.
Specific requirements for Germany
Speed
Always keep to the legal speed limit of 40 km/h for
driving a tractor-machine assembly on public roads.
Safety
19
$Machine specifications
1. Description and glossary
0
Mower conditioner
ALTERNA400
0
1 : Drawbar 2 : Check chains
3 : Parking stand 4 : Wheel chocks
5 : Cutterbars 6 : Side guards
7 : Front guards 8 : Drawbar shift cylinder
9 : Primary PTO shaft 10 : Handbrake
20
Machine specifications
Mower conditioner
ALTERNA400
0
0
1 : Transport wheels 2 : Work wheels
3 : Secondary PTO shaft 4 : Toolbox
5 : Swath shields
Machine specifications
21
Mower conditioner
2. Technical specifications
Attachment type 2 point linkage category 2 and 3
Number of discs 10
Working width 3.90 m (12’10’’)
Width in working position 6.54 m (21’5’’)
Height in working position 1.60 m (5’3’’)
Length in working position 5.93 m (19’5’’)
Width in transport position 2.50 m (8’2’’)
ALTERNA400
Height in transport position 2.04 m (6’8’’)
Length in transport position 8.40 m (27’7’’)
Disc rotational speed 2610 min
Rotor speed 1000 min
-1
-1
Rotor width 1.75 m (5’9’’)
PTO speed 1000 min
-1
Weight 3500 kg (7716 lb) (approximately)
Minimum PTO power requirement 65 kW (90 hp)
Tyres (Transport wheels)
Tyres (Work wheels)
275/65 R18 Profil XP 27
2 x 400/60 - 15.5 14 PLY
22
Machine specifications
3. Required equipment
Braking system
This equipment is fitted on the machine transport
wheels, in conformity with the legislation in force in the
country concerned.
3 possibilities:
Without actuation system.
hydraulic actuation system.
The equipment is composed of:
- 3 hydraulic hoses (1).
- 2 single acting cylinders (2).
- 1 parking brake (7).
Mower conditioner
ALTERNA400
Pneumatic actuation system.
The equipment is composed of:
- 1 support (1).
-1 tanks (2).
- 1 emergency relay valve (3).
- 2 air line filters (4).
- 2 coiled air brake hoses (5):
• Red: Filling.
• Yellow: Actuation.
- 2 brake chambers (6).
- 1 parking brake (7).
7
Machine specifications
23
Mower conditioner
ALTERNA400
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: 76.7 dB(A)
Tractor + machine: 77.8 dB(A)
24
Machine specifications
$Putting into service
1. Description of control elements
The machine is supplied with an 18 mm box wrench (1)
to carry out certain adjustment and maintenance tasks.
Mower conditioner
ALTERNA400
The machine is fitted with one electric control handle (1).
The control handle changes the function of the tractor's
double acting valve and enables:
- Pivot drawbar to mow to the tractor left or right.
or
- Raise or lower transport wheels.
Description of the controls
A push-button switch (1).
Putting into service
25
Description of the connection
Never connect battery charger or perform
welding tasks without having previously
disconnected the control box.
The control handle is to be pluged into a 3-pin socket.
For tractors not fitted with a 3-pin socket, a wiring
harness to be connected directly to the battery is
delivered with the machine.
Do not connect the wiring harness to the
starter connections.
Check that the connectors are in a good
condition and clean.
Mower conditioner
ALTERNA400
Connect the wiring harness directly to the battery
terminals respecting the polarities.
The wiring harness is fitted with a 15 Amp ATO type
fuse. (Part no. 83233017).
26
Putting into service
2. Coupling and uncoupling
Description of coupling elements
- A PTO shaft 1 3/8’’ - 6 splines (1).
- 2 check chains (2).
- 2 hoses to control the mowing unit raising or
lowering (3).
- Two hydraulic hoses controlling the drawbar shift
cylinder (4).
- A 7-pin electric plug for the electrical signalling
equipment (5).
- 1 control handle.
When the machine is fitted with a brake actuation
system:
Mower conditioner
ALTERNA400
- An coupling disconnection cord connecting the
parking brake to a fixed point on the tractor (6).
- 1 hydraulic hose to supply the braking system circuit
(1). (hydraulic actuation system).
- 2 pneumatic hoses to supply the brake actuation
system (1) (2). (Pneumatic actuation system).
6
Putting into service
27
Preparing the tractor
The machine adapts to tractors fitted with a 3-point hitch
coupler category 2 or 3.
The tractor must be fitted with lower link
stabilizers.
Mower conditioner
ALTERNA400
The tractor PTO stub must rotate at a speed of 1000 min
-1
The tractor must be equipped with:
- 2 double acting hydraulic outlet.
Hitch pin parallelism
Adjust tractor lift rods so that hitch pins are parallel to the
ground.
.
28
Putting into service
Coupling the machine
- Lower the tractor three-point linkage.
- Place the lower links as close as possible under the
hitch pins.
- Attach lower links to the hitch pins on the inside of the
yokes.
• Category 2 (a)
Mower conditioner
ALTERNA400
• Category 3 (b)
2 bushes diameter 37 mm (1.45’’) are supplied
with the machine.
- Secure each hitch pin with lynch pin.
- Lift the machine with the tractor's three point linkage.
- Fold parking stand and lock it in place (a).
Putting into service
29
When the machine is fitted with a brake actuation system
Unlock handbrake.
Mower conditioner
ALTERNA400
30
Putting into service
Hydraulic connections
Connect the 2 hydraulic hoses of the drawbar shift
cylinder to a double acting valve (1).
Connect mowing unit lift cylinder hoses to a double
acting valve (2).
Mower conditioner
ALTERNA400
Connect hydraulic hose for braking system to the tractor
"trailor brake" coupler.
Pneumatic braking connections
Respect hose colour when connecting them.
Red: Supply.
Yellow: Actuation.
Connect the coiled air brake hoses to the tractor.
Putting into service
31
Electrical connections
- Connect 7-pin plug to the tractor.
Fit check chain
See section "Frame height adjustment" to position the
check chain.
Mower conditioner
ALTERNA400
Parking brake cord
When the machine is fitted with a brake actuation
system:
- Attach coupling disconnection cord to a fixed point on
the tractor.
32
Putting into service
Primary PTO shaft
Friction slip clutch
The machine is fitted with a friction slip clutch.
Before the machine is put into service and
after a long period of non-use, check the
function of slip clutch to ensure it is not
locked up.
- Uncouple the primary pto shaft from the tractor's PTO
stub:
• Remove 6 bolts (1).
- Remove cut-out clutch guard:
• Remove 3 bolts (2).
- Remove screw (3) and washer (4).
- Remove friction slip clutch.
- Loosen nuts to release friction discs (a).
- Let the friction discs slip for a few seconds (b).
Mower conditioner
ALTERNA400
- Tighten nuts until distance (L) is 35 mm (0’’).
Do not fully tighten springs to prevent
damage on drive elements.
Loosen at least by 1/2 turn.
The friction slip clutch is ready to function.
L
Putting into service
33
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 friction slip clutch and to the tractor PTO
stub.
Check the length of the PTO shaft:
- 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 le ast
25 mm (1’’) must be maintained.
- When the PTO shaft is in its maximum extended
position, the tube overlap must be more than
250 mm (10’’).
Mower conditioner
ALTERNA400
If this is not the case:
• Mark length (H) to cut when the transmission is the
maximum overlap position.
• Shorten the guard tubes and the transmission tubes
by the same length.
• Bevel and clean the tubes.
• Grease the inside of the outer tube.
Never operate the PTO shaft at an angle X exceeding
30°.
To avoid serious accidents, the PTO drive
shaft guards must be properly in place and
fixed with the chains provided.
34
Putting into service
-
Attach PTO shaft guard chain in hole (1) on machine
side.
Immediately replace any worn or damaged
guard.
Mower conditioner
ALTERNA400
Putting into service
35
Adjusting the machine
Lateral adjustment of the lower links.
Balance the play on either sides of the lift lin kage and
lock lower link stabilizers.
Mower conditioner
ALTERNA400
Frame height and check chains
- Lower tractor lift linkage until hitch pins are at a
distance (H) slightly over 650 mm (2’1’’) from the
ground.
- Attach check chains supplied with the machine to the
upper free hole of the tractor's top link attachment
clevis.
- Lower machine until safety chains are taut.
36
Putting into service
Adjusting the braking system
The braking system is mounted and adjusted either at
the factory or by your Kuhn dealer. No adjustment is
required.
Contact your Kuhn dealer for any service operation.
Adjustment of the stroke end sensor for
right hand mowing position
Drawbar shift cylinder
The measure (X) is factory set at 557 mm (1’9’’).
The drawbar shift cylinder enables placing the machine
in 3 different positions:
- Intermediate position (a) for right hand mowing
position: X = 557 mm (1’9’’).
- Open position (b) for transport.
- Closed position (c) for left hand mowing position.
When measure (X) does not correspond to the factory
setting:
- Loosen counter nut (1).
- Tighten or loosen the sliding rod so that measure (X)
equals 557 mm (1’9’’).
- Tighten counter nut (1).
Mower conditioner
ALTERNA400
Putting into service
37
Drawbar pressure pad adjustment
The screw (1) must be in contact with pressure pad (2)
without blocking it.
Tighten counter nut (3):
- Torque: 5 daN m (37 lbf ft).
Proceed the same way on the other side.
Adjustment of the stroke end sensor for
rear transport wheel position
Mower conditioner
ALTERNA400
Operate drawbar shift cylinder to pivot and position
machine perpendicular to the drawbar.
Operate mowing unit lift cylinders to place the machine
in raised position. The transport wheels are raised.
Loosen counter nut (1).
Fully tighten screw (2).
Simultaneously operate push-button of control handle
and transport wheel lowering cylinders to fully lower the
transport wheels.
Loosen screw (2) until it contacts with the stroke end
sensor.
Loosen screw (2) one more turn.
Tighten counter nut (1).
Check that there is a minimum clearance X of
1 mm (0.04’’) between the screw head and the stroke
end sensor body.
The machine can only be put in transport
position if the transport wheel stroke end sensor
is actuated:
- The control indicator light is off (blue) (1).
38
Putting into service
Uncoupling the machine
Park the machine on an even fairly level
ground.
Preferably park the machine in transport
position.
From the transport position:
- Pull handle (1).
- Lower and lock parking stand (2).
- Remove and store check chains.
- Lower the tractor three-point linkage to rest the
machine on the ground.
Mower conditioner
ALTERNA400
2
1
- Block machine with wheel chocks (1).
Putting into service
39
When the machine is fitted with a brake actuation
system:
- Apply parking brake (a).
- Remove cord from tractor and store it in its holder on
the machine.
Mower conditioner
ALTERNA400
- Disconnect the PTO shaft from the tractor. Secure
primary PTO shaft using safety chain (1).
- Disconnect and store hydraulic hoses on holder (2).
- Disconnect and store 7-pin plug in its holder (3).
- Disconnect and store control handle in holder (4).
- Release the lower links.
- Lower the tractor three-point linkage.
The machine is uncoupled.
3
4
2
1
40
Putting into service
$Instructions for transport
Before placing the machine into transport
position:
- Place the machine on level ground.
- Wait until the rotating parts have come
to a complete stop.
- Check that nobody is within the machine
pivoting area.
- If there is someone, make sure the
person moves away.
Mower conditioner
ALTERNA400
1. Putting the machine into transport position
From the working position:
- Position the machine at the tractor's right.
- Raise tractor lift linkage in high position.
- Operate mowing unit lift cylinders to place the
machine in raised position.
- Simultaneously operate push-button of control hand le
and transport wheel lowering cy linders to fully lower
the transport wheels.
- Wait until transport wheels are fully lowered.
- Operate mowing unit lift cylinders to lower the
machine until it rests on the transport wheels.
Work wheels must be positioned closest to the
ground without touching it.
Instructions for transport
41
- Operate drawbar shift cylinder to pivot and place the
machine under the drawbar.
- Check that the mowing units are latched underneath
the drawbar.
- Operate mowing unit lift cylinders to fully raise work
wheels.
- Disconnect and place hydraulic hose couplers in the ir
holders.
- Disconnect and store control handle in holder (1).
- Pivot swath shields inwards.
The machine is in transport position.
Mower conditioner
ALTERNA400
Never engage the tractor PTO drive when the
machine is in transport position.
42
Instructions for transport
2. Conformity with the road regulations
Before driving the machine on public roads,
ensure that the machine complies with
current highway code regulations.
Check that the light boards are clean and that the lighting
equipment functions before transporting the machine on
public roads.
When the machine is fitted with a brake actuation
system. Make sure that the coupling disconnection cord
is properly attached to a fixed point on the tractor.
Mower conditioner
ALTERNA400
Immediately replace any worn or damaged
signalling panels or lights.
Regularly check the tyre pressure
Instructions for transport
43
$Instructions for work
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.
1. Putting the machine into work position
Mower conditioner
ALTERNA400
From the transport position:
- Connect the 2 hydraulic hoses of the drawbar shift
cylinder to a double acting valve (1).
- Connect mowing unit lift cylinder hoses to a double
acting valve (2).
- Connect the control handle plug to the tractor 3-pin
socket.
- Raise tractor lift linkage in high position.
- Operate mowing unit lift cylinder to lower work wheels
closest to the ground without them touching it.
- Operate drawbar shift cylinder to pivot and position
machine perpendicular to the drawbar.
- Operate mowing unit lift cylinders to lower work
wheels until they touch the ground.
- Simultaneously operate push-button of control handle
and transport wheel cylinders to raise the transport
wheels.
- Operate drawbar shift cylinder to pivot and place the
machine to the tractor's right or left.
- Move forward to put the machine work wheels in line
with the tractor wheels.
- Operate mowing unit lift cylinder to lower the mowing
units on the ground.
- Lower the tractor's lift linkage to tension the check
chains.
The machine is in working position.
44
Instructions for work
2. Adjustments in working position
Cutting height
Place the machine on flat ground.
The cutting height is adjusted with the
machine attached, hitch pins at
650 mm (2’1’’) from the ground.
To adjust the cutting height:
- Adjust central skid.
and
- Replace side skids.
Mower conditioner
ALTERNA400
Central skid adjustment
- Operate mowing unit lift cylinders to place the
machine in raised position.
- Place wedges underneath cutterbars.
- Operate mowing unit lift cylinder to place the machine
onto the wedges.
- Remove screw (2).
- Remove pin (1).
- Position skid opposite hole that corresponds to the
required adjustment.
- Reinstall pin (1).
- Refit screw (2):
• Torque: 8.5 daN m (63 lbf ft).
Relationship between the skid adjustment and
the cutting height:
- Adjustment (a):
• Cutting height: 80 mm (3.2’’)
- Adjustment (b):
• Cutting height: 40 mm (1.6’’)
- Adjustment (c):
• Cutting height: 30 mm (1.2’’)
Instructions for work
45
Replacing the side skids
The machine is factory set with low skids.
Additional skids are supplied with the machine:
Side skids Cutting height
Lower 30 mm (1.2’’)
Middle 40 mm (1.6’’)
Raised 80 mm (3.2’’)
- Remove the 4 nuts (2).
- Remove 4 bolts (1).
- Remove side skids.
- Fit side skids corresponding to the central skid
adjustment height.
- Reinstall bolts (1) and nuts (2):
• Torque: 8.5 daN m (63 lbf ft).
Mower conditioner
ALTERNA400
Too low a cutting height can lead to:
- Excessive disc and knife wear.
- Crop being contaminated by soil.
- Delay in regrowth.
46
Instructions for work
Reduced or increased ground pressure
Place the machine on flat ground.
The cutting height is adjusted with the
machine attached, hitch pins at
650 mm (2’1’’) from the ground.
To check the ground pressure
From the working position:
- Check that the chassis height is correct
(H = 650 mm (2’1’’).
- Simultaneously lift and push the mowing unit
rearwards.
- The force (F) must be of approximately 50 daN
(110 lbf) on each side.
- Readjust if necessary.
Mower conditioner
ALTERNA400
To adjust the suspension
From the working position:
- Loosen counter nut (2).
- Turn adjustment screw (1) to reach optimal tension:
• Turn clockwise to reduce the ground pressure until
the mowing unit comes off the ground.
• Turn counter-clockwise to increase the ground
pressure.
- Tighten counter nut (2).
Instructions for work
47
Conditioning intensity
Operate mowing unit lift cylinder to lower the
mowing units on the ground.
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.
Mower conditioner
ALTERNA400
Conditioning comb
Several factors govern the conditioning intensity
adjustment:
- Adjusting the angular position of the comb.
- Selecting the conditioning surface of the comb.
Adjusting the angular position of the comb:
- Unlock hood (1) using box spanner.
- Lift hood.
The control lever is used to adjust the conditioning comb
to 5 different positions.
- Raise control lever to reduce the conditioning
intensity (a).
- Lower control lever to increase the conditioning
intensity (b).
- Lower and lock hood (1).
- Proceed the same way on the other side.
- Check that the adjustment is identical on the 2
mowing units
If the leaves are damaged and the stalks are
crushed, reduce the conditioning intensit y.
.
48
Instructions for work
During the season, check that the
conditioning comb is not blocked up by
foreign material.
Clean the conditioning comb to keep its
efficiency.
Selecting the conditioning surface of the comb
The comb can be turned over to modify the conditioning
intensity:
- A more aggressive side for gramineous plants.
- A softer side for more delicate varieties.
Adjustment:
- Remove 2 bolts (1).
- Slide pin (2).
- Turn over comb to the other position.
- Clean and reassemble the unit:
• Torque: 5 daN m (37 lbf ft).
- Proceed the same way on the other side.
Make sure that the combs of the two mowing
units are set to the same conditioning surface.
Mower conditioner
ALTERNA400
Swathing system
The swathing system comprises:
- 2 swath shields (1).
Swath width adjustment:
- Loosen 2 handles (2):
• Pivot swath shields inwards to reduce the swath
width.
• Pivot swath shields outwards to increase the swath
width.
- Tighten 2 handles (2).
- The twin windrow width is adjustable from
1.40 m (4’7’’) to 2.20 m (7’3’’) approximately.
Instructions for work
49
3. Machine use
Before mowing and to reduce risks of
projections, lower front guards.
Check that nobody is within the machine
pivoting area.
Keep all persons and animals away from the
machine danger zone.
Never lean or step on the guards.
Mower conditioner
ALTERNA400
In case an obstacle has been struck, check
that the mowing unit has not been damaged.
Before the machine engages the crop:
- Engage the tractor PTO and slowly increase the
speed up to 1000 min
Use hand throttle to prevent the conditioner from
getting jammed due to a drop in rotational speed.
The machine is lifted from working position into
headland turn position by means of the mowing
unit lift cylinders.
Groundspeed
Adapt the forward speed to the working
conditions.
-1
.
50
Instructions for work
Working "back and forth"
First pass
- Operate drawbar shift cylind er to put the drawbar in
working position (a).
- Make first pass.
Mower conditioner
ALTERNA400
Second pass
- Operate drawbar shift cylinder to position dr awbar on
the other side (b).
Instructions for work
51
Work "around the field"
Mower conditioner
ALTERNA400
52
Instructions for work
$Optional equipment
1. Yokes
Additional yokes are available for the primary PTO shaft:
1 3/8’’ - 6 spline yoke
Part no. 4503710
1 3/4’’ - 6 spline yoke
Mower conditioner
ALTERNA400
Part no. 4503712
1 3/4’’ - 20 spline yoke
Part no. 4503713
Optional equipment
53
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
Mower conditioner
ALTERNA400
$Maintenance and storage
Oil change:
- Cutterbar
- Central gearbox
- Gyrodine gearbox
- Gearbox
Grease:
- Pivot points
- Ball joints
- Pivot pins
-Chain
After the
first 10
hours of
use
Every 8
hours
Every 100
hours
Every 200
hours or at
the end of
the season
33
33
33
33
3
3
3
3
- Pressure pads
- Wheel arms
Clean:
- Hydraulic filters
54
Maintenance and storage
3
3
3
2. Lubrication
Except for the secondary PTO shaft lubrication, the
machine must be placed in transport position for all
maintenance operations (knife replacement, lubrication,
etc).
Clean grease nipples before greasing.
Lubricate with SHELL multi-purpose grease
grade NLGI 2.
PTO shaft
Primary PTO shaft
Mower conditioner
ALTERNA400
- Every 20 hours:
• universal joints (1).
• transmission tube (2).
- Every 100 hours:
• guide rings (3).
Maintenance and storage
55
Secondary PTO shaft
- Every 20 hours:
• universal joints (1).
• transmission tube (2).
- Every 100 hours:
• guide rings (3).
The pictorials show the points to be greased (1).
Mower conditioner
ALTERNA400
56
Maintenance and storage
Draining the cutterbars
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The cutterbar is lubricated with 1.4 L (0.37 US gal) of SHELL SPIRAX A extreme-pressure gear oil with
viscosity grade SAE 80W90 and API grade GL5.
When draining and refilling, it is recommended to use either a mineral base oil with viscosity grade
SAE 80W90 and API grade GL5, or a synthetic base oil, type PAO (Poly-Alpha-Olefins) with a viscosity
grade equivalent to SAE 80W90.
Never use an oil of viscosity SAE 90 in the
cutterbar.
Mower conditioner
ALTERNA400
From the working position:
- Using two wedges of different height, rest the
cutterbar unit higher on opposite side of drain plug.
- Place a container of sufficient capacity under the
lower cutterbar end.
- Remove 3 bolts (1).
- Remove outer bracket (2) and its seal.
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reassemble the unit:
• Torque: 9.5 daN m (70 lbf ft). If necessary replace
seal.
- Remove plugs (3) and their seals.
- Pour the correct oil quantity and quality through the
opening of the filler plug.
- Clean and reinstall filler plugs (3) and their
seals. Replace if necessary.
- Invert wedges.
- Follow same procedure on the second cutterbar.
Maintenance and storage
57
Central gearbox draining
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The angle gearbox is lubricated with 5.75 L (1.52 US gal) of SHELL SPIRAX A extreme -pressure oil for
mechanical transmissions with viscosity grade SAE 80W90 and API grade GL5.
When draining and refilling, it is recommended to use either a mineral base oil with viscosity grade
SAE 80W90 and API grade GL5, or a synthetic ba se oil, type PAO (Poly-Alpha-Olefins) with a viscosity
grade equivalent to SAE 80W90.
- Remove filler/level plug (1) and its seal.
- Place a container of sufficient capacity under drain
plug.
- Remove drain plug (2) and its washer.
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reinstall drain plug (2) and its
washer. Replace if necessary.
- Pour the prescribed oil quantity and quality through
the opening of the filler plug.
- Central gearbox oil level control:
• The "MAX" level corresponds to the mark on the
dipstick plug.
• The "MIN" level corresponds to the end of the
dipstick plug.
- Clean and reinstall filler plug (1) and its washer.
Replace if necessary.
Mower conditioner
ALTERNA400
58
Maintenance and storage
Draining the Gyrodine gearbox
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The Gyrodine gearbox is lubricated with 5.5 L (1.42 US gal) of SHELL SPIRAX extreme-pressure gear
oil with SAE 80W90 viscosity grade API and GL5.
When draining and refilling, it is recommended to use either a mineral base oil with viscosity grade
SAE 80W90 and API grade GL5, or a synthetic base oil, type PAO (Poly- Alpha-Olefins) with a viscosity
grade equivalent to SAE 80W90.
- Remove dipstick plug (1).
- Place a container of sufficient capacity under drain
plug.
- Remove drain plug (2) and its washer.
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reinstall drain plug (2) and its
washer. Replace if necessary.
- Pour the correct oil quantity and quality through the
opening of the filler plug (1).
- Check Gyrodine gearbox level:
• The "MAX" level corresponds to the mark on the
dipstick plug.
• The "MIN" level corresponds to the end of the
dipstick plug.
- Clean and reinstall dipstick plug (1). Replace it if
necessary.
Mower conditioner
ALTERNA400
Maintenance and storage
59
Changing angle gearbox oil
Upper gearbox:
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The upper gearbox is lubricated with 1.75 L (0.46 US gal) of SHELL SPIRAX extreme-pressure gear oil
with SAE 80W90 viscosity grade API and GL5.
When draining and refilling, it is recommended to use either a mineral base oil with viscosity grade
SAE 80W90 and API grade GL5, or a synthetic base oil, type PAO (Poly-Alpha-Olefins) with a viscosity
grade equivalent to SAE 80W90.
- Remove dipstick plug (1).
- Use an oil syringe to drain the angle gearbox.
- Pour the correct oil quantity and quality through the
opening of the filler plug (1).
- Check oil level in upper gearbox:
• The "MAX" level corresponds to the mark on the
dipstick plug.
• The "MIN" level corresponds to the end of the
dipstick plug.
- Clean and reinstall dipstick plug (1). Replace it if
necessary.
Mower conditioner
ALTERNA400
60
Maintenance and storage
Mower conditioner
ALTERNA400
Lower gearbox:
Before draining oil, operate the machine for a
few minutes so that the oil warms up.
The lower gearbox is lubricated with 1.75 L (0.46 US gal) of SHELL SPIRAX extreme-pressure gear oil
with SAE 80W90 viscosity grade API and GL5.
When draining and refilling, it is recommended to use either a mineral base oil with viscosity grade
SAE 80W90 and API grade GL5, or a synthetic base oil, type PAO (Poly- Alpha-Olefins) with a viscosi ty
grade equivalent to SAE 80W90.
- Remove filler plug (1).
- Place a container of sufficient capacity under drain
plug.
- Remove level plug (2).
- Remove drain plug (3).
- Allow oil to drain completely.
- Wait for dripping to stop.
- Clean and reinstall drain plug (3). Replace it if
necessary.
- Pour the correct oil quantity and quality through the
opening of the filler plug (1).
- Check gearbox oil level:
• The oil level must reach lower part of level plug hole.
- Clean and reinstall filler plug (1) and its washer.
Replace it if necessary.
- Clean and reinstall level plug. Replace it if necessary.
Maintenance and storage
61
Grease
- Pivot points (1).
- Pivot point (1).
Mower conditioner
ALTERNA400
- Ball joints (1).
- Chain (2).
- Pin (1). Proceed the same way on the other side.
62
Maintenance and storage
- Pressure pads (1).
From the transport position.
Mower conditioner
ALTERNA400
Grease:
- Wheel arms (1).
Maintenance and storage
63
3. 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.
After the first 10 hours of use
Belts
Check belt tension
- Remove 4 bolts (1).
- Remove belt guard (2).
Mower conditioner
ALTERNA400
The deflection (X) is factory set at 10 mm (0.4’’).
- Check that measure (X) is kept.
Belt tension
- Tigthen nut (1).
- Reinstall belt guard:
• Torque: 4.9 daN m (36 lbf ft).
Follow same procedure on the second mowing
unit.
64
Maintenance and storage
Belt set replacement
Remove 4 bolts (1).
Remove belt guard (2).
Mower conditioner
ALTERNA400
Loosen nut (1) to slacken belts.
Remove the 3 V-belts (2).
Fit new belt sets.
Tighten nut (1) to obtain optimal belt tension:
- Apply a force of 35 N (1.6 lbf) on the belt. the belt
should not deflect more than (X) = 10 mm (0.4’’).
Reinstall belt guard:
- Torque: 4.9 daN m (36 lbf ft).
Never replace belts individually. When a belt is
damaged, always replace the whole set:
-(Part no.83101696).
Braking system
The braking system is mounted and adjusted either at
the factory or by your Kuhn dealer. No adjustment is
required.
Contact your Kuhn dealer for any service operation.
Maintenance and storage
65
Checking cutterbar oil level
Periodically check the cutterbar oil level:
- Park the machine on an even fairly level ground.
- Remove filler plug (1) and (2) as well as their seals.
- Through filler plugs, check that the oil level (h) is
comprised between 7 and 8 mm (0.27’’ - 0.31’’).
• Top up if necessary.
- Clean and reinstall filler plugs and their seals (1) and
(2). Replace if necessary.
If in doubt as to the oil quantity contained in
the cutterbar, fully drain and refill cutterbar
respecting recommended oil quantity and
quality.
If it is found that the transmission case is very hot
to touch by hand, there is no cause of alarm
provided:
- Lubrication recommendations have been
respected.
- Discs can be rotated freely by hand when
the machine is hot.
Mower conditioner
ALTERNA400
Before checking that the discs rotate freely by hand:
Turn off the engine, remove ignition key and
wait until all moving parts have come to a
complete stop.
66
Maintenance and storage
Checking the oil levels
Gyrodine gearbox
- Check oil level in lower gearbox:
• The "MAX" level corresponds to the mark on the
dipstick plug.
• The "MIN" level corresponds to the end of the
dipstick plug.
Side gearbox
- Check angle gearbox oil level:
• The "MAX" level corresponds to the mark on the
dipstick plug.
• The "MIN" level corresponds to the end of the
dipstick plug.
Mower conditioner
ALTERNA400
Filter cleaning
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.
The filters are located in a filtering block at the front of the
drawbar.
Disconnect the hydraulic hoses (1).
Unscrew connectors (2).
Clean filters if necessary.
Reassemble the unit.
Maintenance and storage
67
Inspection of knives and securing
elements
Immediately replace worn or damaged parts with
genuine KUHN parts.
Knives
Inspect systematically all knives before the machine is
operated to:
• guarantee the cutting quality.
• guarantee safety in use.
• Prevent cutterbar damage risks.
Replace knives in the following cases:
- Damaged knives. Very rough conditions can cause
knives to crack and become deformed.
- Worn knives
Knife length C must exceed 65 mm (2.6’’).
Knife width B, measured at a distance A of 10 mm (0.4’’)
from the disc edge must exceed 20 mm (0.8’’).
The hole L for the securing bolt must not become oval by
more than 20 mm (0.8’’).
Always replace both knives per disc to avoid creating an
out-of-balance force.
Mower conditioner
ALTERNA400
68
Maintenance and storage
Fixing elements
Check the fixing elements:
- After hitting an obstacle.
- When replacing knives.
- At the beginning of each season.
The fixing bolts should be changed in the following
cases:
- When there is visible distortion.
- When the locking compound is worn or inoperational.
- When the bolt head wear reaches the center line of
the bolt.
- When diameter D of the bolt shoulder is less than
15 mm (0.6’’).
- After having been removed 5 times.
Mower conditioner
ALTERNA400
Replace nuts in the following cases:
- When the contact washer has lost its elasticity.
- When the contact washer loosens itself from the nut.
- When nut wear reaches a = 5 mm (0.2’’).
- After having been removed 5 times.
Check the condition of the fixing elements
regularly and also the torque of the knife-fixing
bolt: 12 daN m / 89 lbf ft.
Maintenance and storage
69
Knife replacement
Replace knife lock-nuts and bolts when they
have been removed 5 times.
Replace immediately all worn or distorted
knives. Never straighten a bent knife.
Always replace both knives per disc.
Clean the nut case.
Place a wooden wedge between two discs to stop them
from rotating.
Loosen nut using box spanner supplied with the
machine.
Remove bolt through opening located at the front of the
disc guard.
Knives can be turned over on the same disc to use the
other cutting edge or replaced. On each knife , an arrow
indicates the disc's direction of rotation.
Make sure that the securing nut and bolt are in good
condition and if necessary, replace them.
Torque knife locknut to 12 daN m (89 lbf ft).
Dull knives require more horse power and have a
negative effect on the cut quality.
Mower conditioner
ALTERNA400
Disc replacement
Place a wooden wedge (2) between two discs to stop
them from moving.
Remove 4 bolts (1) and their spring washers using the
box spanner supplied with the machine.
Remove the disc.
When remounting:
Position their largest diameters at right angles to each
other.
Position conical centre of spring washer at the top.
Torque bolts to (1):
- Torque: 12 daN m (89 lbf ft).
70
Maintenance and storage
Drawing of the hydraulic circuit
Mower conditioner
ALTERNA400
Maintenance and storage
71
4. Storage
At the end of each season
- Clean the machine thoroughly.
- Drain all gearboxes and cutterbar and refill with new
oil (see "Lubrication" chapter).
- Touch up any areas of damaged paintwork.
- Put the machine under cover in a dry place.
- Inspect and replace worn knives and bolts (See
section: Inspection of knives and securing elements).
- Inspect and replace worn or damaged fingers on the
conditioning rotor.
- Slacken V-belts and check their condition.
- Depressurize all hydraulic functions.
Mower conditioner
ALTERNA400
At the start of each season
- Re-read the operators' manual.
- Pressurize the hydraulic circuit.
- Inspect and replace worn knives and bolts (See
chapter: Inspection of knives and secur ing elemen ts).
- Check that all nuts and bolts are sufficiently tightened.
- Retension V-belts.
- Check belt guard condition and if it is firmly secured in
place.
- Inspect and replace worn or damaged fingers on the
conditioning rotor.
- Make sure all the guards are in place.
- Check tyre pressure.
72
Maintenance and storage
Mower conditioner
$Trouble shooting guide
-
Problem Cause Remedy
Uneven stubble.
Soil build up in front of the
cutterbar.
Obstruction of conditioning
rotor.
Too low PTO speed (rotational
frequency).
Dull or broken knives. Replace knives.
Knives not installed correctly.
Excessive ground speed. Reduce ground speed.
Incorrect mowing unit
floatation.
Tangled and down crops.
Too much cutterbar down
pressure.
Very wet working conditions.
The drive belts slip.
Insufficient rotor speed
(rotational frequency).
Insufficient rotor speed
(rotational frequency).
Increase speed to 1000 min
Make sure the arrow on the
knife upper face is pointing in
the disc's direction of rotation.
Adjust the mowing unit ground
pressure.
Reduce cutting height.
Adjust the mowing unit ground
pressure.
Adjust the mowing unit ground
pressure.
Adjust the mowing unit ground
pressure.
Adjust the cutting height.
Retension belts. Replace if
necessary.
Check alignment.
Check the rotor drive belts,
replace if necessary.
Increase speed to 1100 min
ALTERNA400
-1
.
-1
.
Swath shields too closed. Open swath shields.
Trouble shooting guide
73
Mower conditioner
ALTERNA400
Badly shaped windrows.
Machine requires too much pull
power.
Considerable vibrations.
Leaves and stems are
damaged.
Bad ground contour
adaptation.
Slow response of the hydrau lic
functions.
Belts slip.
Too low PTO speed (rotational
frequency).
Check the rotor drive belts,
replace if necessary.
Increase speed to 1000 min
Excessive ground speed. Reduce ground speed.
Comb angle not adapted.
Incorrectly adjusted swath
shields.
Too much cutterbar down
pressure.
Adjust combs according to grass
condition.
Adjust both swath shields.
Adjust the mowing unit ground
pressure.
Check condition of the swinging
The conditioning rotors are not
balanced.
fingers.
Replace them by pairs if
necessary. (Equal weight).
Comb angle not adapted.
Excessive floatation.
Adjust combs according to grass
condition.
Increase the mowing unit ground
pressure.
Excessive ground speed. Reduce ground speed.
Incorrect tractor lift linkage
setting.
Hydraulic oil filtering elements
are clogged up.
Adjust height of lower links to
650 mm (2’1’’)
Clean filters if necessary.
-1
.
74
Trouble shooting guide
$Limited warranty
Mower conditioner
ALTERNA400
Limited warranty
75
Mower conditioner
ALTERNA400
76
Limited warranty
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