Aardenburg BETA M Series Operation manual

Aardenburg Machinery BV. ALPHA BETA M (door) 1
BETA M (door)
Flail Mulcher
Operation, Service

Aardenburg Machinery BV. ALPHA BETA M (door) 2
TABLE OF CONTENTS
1.0 GUARANTEE
1.1 Guarantee terms
1.2 Guarantee certificate
2.0 INTRODUCTION
2.1 Foreword
3. 0 MACHINE MODEL AND BASIC COMPONENTS
3.1 Basic components
3.2 Functional characteristics
3.3 Standard tools
4. 0 CARDAN SHAFT
4.1 Cardan shaft specifications
5.0 INSTALLING THE MACHINE
5.1 Assembly of the partly-dismantled machine
5.2 Connection to the three-point hitch
5.3 Installing the cardan shaft
5.4 Disconnecting the machine
5.5 On-road transport
6.0 OPERATING INSTRUCTIONS
6.1 General instructions
6.2 Instructions for use in the field
6.3 Use in the field
6.4 Forward speed
7.0 MACHINE MAINTENANCE
7.1 Important warnings and operating instructions
7.2 Preventive guidelines
7.3 Routine maintenance
7.3 Greasing and lubrication
7.4 Belt tensions
7.5 Replacing tools
7.5.1 Replacing hammers
7.5.2 Replacing blades
7.6 Operating test
8.0 SAFE WORKING CONDITIONS
8.1 General precautions
8 .2 Safe operation and maintenance of the machine
8 .2.1 Connection between tractor and operating machine
8.2.2 Protection of moving drive parts
8 .2.3 Projection of materials
8 .2.4 Noise
8 .2.5 Personal protection devices
8 .2.6 Stability

Aardenburg Machinery BV. ALPHA BETA M (door) 3
1.0 GUARANTEE
Check, upon receipt of the machine, that it has not been damaged during shipment and that all accessories are
present.
1.0.1 GUARANTEE TERMS
-The manufacturer guarantees its products for a period of 24 months from the date of delivery on the condition
that the herein attached form is fully compiled in all its parts and sent to the manufacturer within 15 days of
date of delivery.
-The manufacturer, in accordance with the aforementioned terms, agrees to supply under guarantee coverage
all components to be replaced according to its own decision or to the opinion of its own authorized
representatives regarding parts that have material or manufacturing defects. Shipping and labor costs in this
regard shall in any case be charged to the customer.
-Guarantee coverage does not include payment for damages caused by improper use of the machine by the
machine operator and for parts normally subject to wear and tear and breakage such as hammers, blades,
belts, etc.
-The manufacturer is not responsible for accidents to the operator or to third parties caused by improper use of
the machine.
-This guarantee is not valid whenever:
a) assistance and repairs were done by unauthorized individuals or companies;
b) the machine has been previously repaired or modified using non-original spare parts;
c) whenever there has been a mistake when manicuring the machine;
d) there has been insufficient maintenance and/or lubrication;
e) when permissible power limits have been exceeded;
f) whenever the instructions in this manual are not duly complied with;
g) whenever unauthorized modifications have been brought to the machine.
-Machine breakdowns during or after the guarantee period shall not give rise to any right to interrupt payments
for the goods that have already been delivered. No breakage or malfunction can be used as a pretext for
delaying payments.
-The manufacturer reserves the right, at all times, to bring all due changes with the object of improving its own
product and is not obligated to add these changes to previously manufactured machines that have already
been delivered or are undergoing manufacture.
-These general guarantee terms replace and cancel all previous explicit or implicit guarantee conditions.

Aardenburg Machinery BV. ALPHA BETA M (door) 4
1.0 GUARANTEE
1.0.2 GUARANTEE CERTIFICATE (purchaser’s copy)
Purchaser’s data
Type of machine
Last name:
Model:
Name:
Code:
Address:
Serial Number:
Date of compilation:
Date of delivery:
Purchaser’s signature:
GUARANTEE CERTIFICATE (copy for the manufacturer)
Purchaser’s data
Type of machine
Last name:
Model:
Name:
Code:
Address:
Serial number:
Date of compilation:
Date of delivery:
Purchaser’s signature:

Aardenburg Machinery BV. ALPHA BETA M (door) 5
2.0 Introduction
2.1 FOREWORD
This manual describes all instructions for operating and maintaining the machine in question as well as accident
prevention standards.
We recommend reading it with care and attentively complying with all the procedures described in it before
starting up, using or maintaining the machine because:
THE MANUFACTURER DECLINES ALL RESPONSIBILITY FOR DAMAGE CAUSED BY FAILURE TO COMPLY WITH THE STANDARDS
AND GUIDELINES CONTAINED IN THIS MANUAL.
A series of pictograph are given in the manual to make it easier to read
and to quickly attract the reader’s attention to hazard situations and
guidelines that cannot be avoided or sufficiently limited through use of
technical protection systems or work organization measures and
methods.
These pictograph, in other words, give information on objects and
situations that may represent a specific danger.
WARNING:
The machine, during its use, can present danger situations: read this
manual with care before using the machine.
WARNING:
What is described regards your safety and the safety of all employees and
persons who may find themselves in the vicinity of this machine.
Whenever the machine is used by more than one person it is absolutely
necessary for each user to examine this manual prior to using the
machine.
WARNING:
It is dangerous to bring your hands or feet near to the tool when the rotor
is in movement wait until the rotor has completely stopped before working
on the machine! Always remember that the high inertia of the rotor means
that it needs a few minutes before it stops.
WARNING:
In certain work situations the machine may project shredded material:
always respect safety distances and make sure they are respected!

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3.0 Machine model and basic components
CODIFICATION SYSTEM:
This manual has an identification code for each machine component.
THIS IDENTIFICATION CODE MUST BE USED FOR:
1 -ORDERING THE MACHINE ITSELF
2 - ORDERING SPARE PARTS
3 - REQUESTING TECHNICAL INFORMATION
3.1 MACHINE BASIC COMPONENTS
Pos. Name
1Side guard
2Frame
3Side shift cylinder
4Articulation cylinder
5Gearbox
6Universal joint housing
7Transmission cover
8Upper link pin
9Drawbar
10 Foot
11 Parallel hitch pins
12 Parallelogram
13 Flaps
14 Rotor
15 Levelling roller

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3.0 Machine model and basic components
3.2 FUNCTIONAL CHARACTERISTICS OF THE MACHINE
The machine can work behind the tractor or on the side of the tractor, mowing the banks of ditches inclined
upwards or downwards. The following illustration and table indicate the machine’s range of action
3.3 STANDARD TOOLS
Original tools are the results of in-depth research and lengthy experience. They are made out of high quality
steel and parts subject to thermal treatments are extremely tough and wear-resistant. Weights and dimensions
are rigorously monitored and the rotor does not required to be newly dynamically balanced in case of partial or
total tool replacement.
Tools that are broken or excessively worn can cause the machine to vibrate. In this case you must immediately
stop working and start working again only after replacing the tools.
If the machine still vibrates after the tools are replaced then the rotor must be dynamically balanced.
The high strength 10.9 (UNI 3740) fastening screw guarantees a sure connection and duration that corresponds
to the duration of the tools.
WARNING:
INSTALL ONLY ORIGINAL TOOLS ON THE ROTOR!!
TYPES OF TOOLS
Mod.
A
B
C
D
E
(cm)
(cm)
(cm)
(cm)
(cm)
BETA M 1050
105
130
106
155
85
BETA M 1250
125
130
96
180
105
BETA M 1450
145
130
86
205
125
BETA M 1650
165
130
76
220
145
BETA M 1850
185
130
66
235
165

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4.0 Cardan Shaft
4.1 CARDAN SHAFT SPECIFICATIONS
The cardan shaft is the drive component that powers the machine; it must be selected based on specific criteria
that define its dimensions and length.
The machine come standard with cardan shafts.
The following table gives the size of the cardan shaft which is much larger than the power that is absorbed during
mowing.
This design choice guarantees maximum cardan shaft strength during maximum extension.
WARNING:
The cardan shaft, when it operates, can create hazard and danger situations
.
Machine operators must:
-read and preserve the operating and maintenance booklet attached with the
cardan shaft;
-check that the cardan shaft is suitable for transmitting the required power;
-use exclusively the cardan shaft supplied with the machine;
-check that guards are properly installed, whole and effective;
-replace worn, broken or missing guards;
-turn the tractor motor off before working on the cardan shaft or on the machine
itself;
-never let children or extraneous persons come near to the machine when it is at
work and/or undergoing maintenance;
-set the cardan shaft on its specific support when it is not in use;
-wear suitable garments (that cannot be caught by the machine or pulled into it),
especially close-fitting garments (such as work overalls with safety wrists and
ankles);

Aardenburg Machinery BV. ALPHA BETA M (door) 9
5.0 Installing the machine
5.1 ASSEMBLY OF THE PARTLY-DISMANTLED MACHINE
In some cases the machine is delivered partly dismantled to reduce shipping bulk. In this case it must be
reassembled in order to work..
WARNING:
THE PROCEDURES DESCRIBED BELOW CAN CREATE DANGEROUS
SITUATIONS.
IN ADDITION, THE SIZES AND WEIGHTS OF THE MACHINE’S COMPONENTS
MAKE IT NECESSARY TO WORK WITH THE HELP OF A HOIST
-Set the machine firmly on a flat surface;
-Remove the three-point drawbar from the packing and set it on the ground;
-Move the parallelogram arms with care and attention until they are centered on their connection holes;
-Move the jack and fasten it in place with its pin.

Aardenburg Machinery BV. ALPHA BETA M (door) 10
5.0 Installing the machine
5.2 CONNECTION TO THE THREE-POINT HITCH
WARNING:
THESE PROCEDURES ARE VERY HAZARDOUS:
AVOID STANDING IN FRONT OF THE MACHINE WHEN IT IS APPROACHED
BY THE TRACTOR.
AVOID THE PRESENCE OF EXTRANEOUS PERSONS.
THE P.T.O. MUST BE DISENGAGED DURING THESE INSTALLATION
PROCEDURES.
Before installing the machine make sure it is in perfect condition, resting on the ground and level and that
lubricants are at proper levels and all components subject to wear and/or deterioration are perfectly efficient.
Also check that the size and weight of the tractor is suitable for carrying the machine.
Proceed as follows after making these checks:
1. remove the safety pins (1), pull out washer (2) and pin (3);
2. carefully bring the tractor near until you center the lower connection pins and thread the connection arms of
the lift; reinsert the safety pins (1);
3. brake the tractor and turn it off;
4. adjust the arm tie-rods in order to prevent the machine from swinging to the right and left;
5. install the cardan shaft making sure that the push-buttons are properly inserted in their slots (see paragraph
5.4);
6. turn the support (4) up to the position 5;
7. install the third point tie-rod, insert the pin supplied with the machine (3), the washer (2) and the related safety
pin (1);
8. adjust the length of the third point so that the pin is approximately in the center of the slot;
9. clamp the third point tie-rod;
10. slightly lift the machine off the ground and lift the parking stand (6);
11. connect the cylinder drive hoses;

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5.0 Installing the machine
5.3 INSTALLING THE CARDAN SHAFT
THE MANUFACTURER GUARANTEES THAT THE CARDAN SHAFT, SUPPLIED WITH THE
MACHINE, IS SUITABLE FOR SAFELY SUPPORTING POWER ABSORPTION LEVELS
DURING WORK PROCESSES AS LONG AS ALL OPERATING AND USE CONDITIONS
ARE COMPLIED WITH.
WHEN THE CARDAN SHAFT IS REPLACED IT CAN BE REPLACED BY ANOTHER THAT
MEETS EC STANDARDS AND THAT IS SUITABLE FOR TRANSMITTING THE POWER
RATINGS INDICATED IN THE TABLE AT PARAGRAPH 4.1. CAREFULLY READ THE
INSTRUCTION BOOKLET THAT COMES WITH THE CARDAN SHAFT BEFORE
PERFORMING
THESE PROCEDURES.
WHEN FIRST INSTALLING THE CARDAN SHAFT:
Measure the distance K between the races of the P.T.O. push-buttons with the machine
rested on the ground and level and with the overgear axially aligned with the tractor’s P.T.O.:
if the length of the cardan shaft that is supplied needs to be modified make sure that the
telescoping tubes overlap for a length that permits between 40 and 50 mm of play L at their
ends.
IMPORTANT:
THIS PROCEDURE MUST BE DONE THE FIRST TIME THE SHAFT IS INSTALLED, EVERY
TIME IT IS REPLACED AND EVERY TIME THE MACHINE IS INSTALLED ON ANOTHER
TRACTOR.
WARNING AFTER INSTALLING THE CARDAN SHAFT FASTEN ITS GUARD FROM BOTH
SIDES WITH THE SPECIFIC CHAINS.
IMPORTANT:
GREASE THE CARDAN SHAFT ACCORDING TO THE RECOMMENDATIONS GIVEN IN
THE CARDAN SHAFT’S
MANUAL.
IMPORTANT:
NEVER WORK WITH CARDAN SHAFTS WITHOUT THEIR SAFETY GUARDS
READ THE INSTRUCTION BOOKLET THAT COMES WITH THE CARDAN SHAFT WITH
CARE.
When the machine is put away for storage always set the cardan shaft on its specific support bracket S provided
on the three-point drawbar to avoid build-up of dirt or deformation or breakage of the protective guard.

Aardenburg Machinery BV. ALPHA BETA M (door) 12
5.0 Installing the machine
5.4 DISCONNECTING THE MACHINE
WARNING:
THE PROCEDURES DESCRIBED BELOW CAN CREATE DANGER SITUATIONS: KEEP
EXTRANEOUS PERSONS AWAY FROM WHERE THE MACHINE WILL BE POSITIONED
AND FROM ITS IMMEDIATE VICINITY.
Comply rigorously with the following instructions in order to unhook the machine from the tractor. For greater
clarity you can also consult paragraph 5.2 “INSTALLING THE MACHINE”.
For disconnecting, proceed as follows:
1. Disengage the P.T.O.;
2. Rest the machine on the levelling roller;
3. Put the tractor’s brakes on;
4. Lower the parking stand (6);
5. Completely rest the machine on the ground and turn the tractor off;
6. Disconnect the third point tie-rod;
7. Disconnect the cardan shaft from the tractor and rest it on the bracket;
8. Disconnect the parallel hitches;
9. Disconnect the jack supply hoses
Put the connection pins and safety clip pins back in their housings on the drawbar so you will be sure to find them
when you use the machine again.
5.5 TRANSPORT ON ROAD
WARNING:
ON-ROAD TRANSPORT MUST BE DONE WITH MAXIMUM CARE AND ATTENTION TO
AVOID DANGER TO
PERSONS AND VEHICLES IN TRANSIT.
Before performing on-road travel make sure that all the machine’s parts are whole and in goof conditions.
Then proceed as follows:
1. disengage the P.T.O.
2. use the distributor that drives the movement jack to close the machine behind the tractor;
3. lift the machine off the ground enough so that it can be rotated vertical;
4. turn the machine vertical using the distributor that controls the joint jack;
5. if necessary, lift the machine higher so that drive components do not touch the ground:
6. hang the safety chain C to the hook S

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6.0 Operating instruction
6.1 GENERAL REGULATIONS
The machine is designed and manufactured exclusively for shredding grass, shrubs, pruning and branches of up
to 3 cm. in diameter
It can be used:
-hitched to the rear of the tractor
-on the side of the tractor, hinged upwards or downwards depending on the position required by the job.
The table given in paragraph 3.2 illustrates the maximum limits that the machine can work within.
It is prohibited to use them:
-if they are coupled with undersized tractors
-if there are loose stones on the surface of the terrain
-if terrains do not permit stable tractor operation, such as steep rising or descending slopes, the vicinity of
ditches or cliffs, very uneven terrain, etc.
-to cut down trees and bushes
-in situations that require sharp turns
-in reverse direction
-
IMPORTANT:
REMEMBER THAT YOUR OWN VISIBILITY AND THAT OF OTHER VEHICLES MAY BE
IMPAIRED WHEN WORKING ON DUSTY TERRAIN.
6.2 INSTRUCTIONS FOR USE ON FIELD
This paragraph provides instructions for safely using the machine in its work area:
1. Carefully check that the machine operates properly before using it for the first time in the field: do this by rotating
the rotor for a few minutes without any load, applying the instructions illustrated in paragraph 7.6. Perform this
same check every time you start using the machine again;
2. Whenever turning around when working always disengage the tractor’s P.T.O., wait until the rotor stops, lift the
machine and then reverse your direction of operation;
3. Always make sure, when working, that nobody is present in the machine’s residual risk zone;
4. Disengage the P.T.O. before lifting the machine, do not operate the machine while it is lifted and always stop
the machine before descending from the tractor;
5. Respect safe distances when working near houses or roads:
5.1. 5 meters on the side;
5.2. 10 meters to the rear.

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6.0 Operating instruction
6.3 USE ON FIELD
Hitch the machine correctly to the tractor, move to the work zone and then proceed as follows:
1. use the distributor that controls the joint jack to turn the machine and bring it horizontal;
2. use the distributor that controls the movement jack to move the machine until it is in the work zone;
3. use the lift controls to lower the machine until its roller rests on the ground;
4. engage the P.T.O. and gradually accelerate the tractor until you reach a 540 RPM rotation speed;
5. engage 1st gear and start to work;
6. If necessary use the lift to adjust working height, preventing cutting tools (hammers or blades) from coming in
contact with the ground:
NO YES
7. If necessary, adapt the tractor’s forward speed to the job
(paragraph 6.4 gives several recommended guideline speeds);
8. Adjust the position of the roller to increase or decrease cutting height with respect to the ground (minimum
cutting height 30 mm).
See the instructions in paragraphs 8.1, in order to make these adjustments.
ALWAYS MAKE SURE, WHEN YOU HAVE FINISHED WORKING WITH THE MACHINE, THAT
THE ROTOR IS
STOPPED BEFORE CLOSING THE MACHINE.
6.4 FORWARD SPEED
Remember that the forward speed of the tractor must adapt to the type and quantity of material being
shredded. EXCESS SPEEDS put excessive stresses on drive components, wearing them out ahead of
time.
This will produce poor-quality shredded material, the possible expulsion of large pieces of material
which, because of their higher inertia may be projected beyond forecast safety limits.
The following

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7.0 Machine maintenance
7.1 IMPORTANT WARNINGS AND OPERATING INSTRUCTIONS
The structure, design and efficiency of this machine may cause operators to underestimate
risks that can arise during maintenance and/or repair procedures.
Scrupulously comply with the guidelines described in this manual for all maintenance and/or
repair procedures in order to avoid any risks inherent to these tasks.
Here we list a few general precautions:
-read the operating and maintenance manual with care;
-perform all maintenance and/or repair in suitable work sites;
-prepare a suitable storage site for the machine;
-collect recovered oil in specific disposal containers;
-use suitable tools with the proper skill;
-employ personal protection devices (DPI).
READ THIS MANUAL WITH CARE.
This manual must be read with care in order to prevent all risks when performing specific
operations, whether when working with the machine or during maintenance and/or repair.
Turn to specialists to do everything that is not specifically indicated in this operating and
maintenance manual.
WARNING:
IT IS VERY DANGEROUS TO WORK ON THE MACHINE WITHOUT SUFFICIENT
INFORMATION ON WORK PROCEDURES.
PERFORM MAINTENANCE AND/OR REPAIR IN SUITABLE WORK SITES.
Suitable work sites include a flat, paved and well illuminated support surface that is
sufficiently large and, if possible, located inside a building. It must always be possible, when
working on the machine, to keep it in a stable position. It may, if necessary, be sustained by
special support devices designed to guarantee stability even when the machine is subjected
to stresses.
PREPARE A SUITABLE STORAGE SITE FOR THE MACHINE.
Store the machine in a covered area. Remember that:
-the machine must be safely positioned so that it will not fall over and so that hook-up and
release procedures are simple and easy;
-entryways must permit easy passage;
-the tractor engine must only operate inside the storage site the amount of time
necessary for entering and exiting and for maneuvering: avoid build-up of exhaust gases;
-keep the storage site orderly to make machine movements as easy as possible.
COLLECT RECOVERED OIL IN SPECIFIC DISPOSAL CONTAINERS.
Used oil is harmful to the environment and to health. Use all necessary precautions when
disposing of used oils. Comply with currently valid legislation in your own country regarding
environmental protection and waste disposal legislation.
It is good practice, when changing oil, to wear protective gloves.
Carefully wash body parts of the skin comes in contact with the used oil.

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7.0 Machine maintenance
7.1 IMPORTANT WARNINGS AND OPERATING INSTRUCTIONS
USE SUITABLE TOOLS WITH PROPER SKILL
Appropriate tools must be used even for the simplest tasks: improper use or incorrect tools
can cause serious risks and hazards for persons. In this regard you should also use
personal protection devices (DPI).
It is also good practice to keep tools in good shape and transport them with care
EMPLOY PERSONAL PROTECTION DEVICES (DPI).
Personal protection devices must be used in accordance with current standards in your own
country and depending on the type of task being performed.
We give all the relative specifications on the “Working in Safe Conditions” chapter.
7.2 PREVENTIVE GUIDELINES
Follow these guidelines to best use and maintain the machine:
a. After the first 4 work hours and subsequently at 50 hour work intervals:
1. check that all bolts are tight;
2. check the tension of drive belts;
3. check lubricant levels;
b. If the machine will be inactive for a long time period:
1. clean the machine with care;
2. check its condition and take all necessary measures so it will be ready for prompt use;
3. keep the machine indoors during the winter where temperatures do not drop much below 0°C
(zero degrees Centigrade)
c. The first time the machine is used again:
1. grease all bearings;
2. check lubricant levels;
3. check the condition of the transmission;
4. before reinstalling the cardan shaft make sure it is the one supplied with the machine and that all
protective devices are complete and in proper operating order.
d. Periodically check the state of all protective devices: replace those that are deformed, broken or missing.
7.3 ROUTINE MAINTENANCE
Moving parts must be protected according to current law to prevent the hazards of contact, catching,
pulling and crushing of body parts.
Always check that:
a) moving parts are protected and that their protective devices are sound and efficient;
b) protective devices are always put back in position whenever they are removed in order to perform
maintenance;
c) always wear suitable clothing according to specified Personal Protection Measures.
WARNING:
THE P.T.O. MUST BE DISENGAGED AND THE TRACTOR OFF AND PROPERLY
BRAKED OR DISCONNECTED
BEFORE BEGINNING ANY MAINTENANCE PROCEDURES

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7.0 Machine maintenance
7.3.1 GREASING AND LUBRICATION
Systematic and periodic machine greasing and lubrication keep it performing well and prolong its working life
LUBRICATING THE TRANSMISSION SYSTEM
Carefully clean components around plugs before
working on transmission systems: this prevents dirt from
penetrating into these systems.
Transmission systems require the following checks:
1- check the oil level in the gearbox during the first 20
work hours: oil must come up to the level hole. Add oil
as required. Perform the next oil level checks at 50
hour intervals.
2- totally replace the oil in the gearbox after the first 40
work hours. Then repeat this every 250 work hours;
Oil is introduced into the gearbox through the hole closed by
plug R. The oil level is indicated by the hole closed with plug L.
Remove protective cone C in order to access plug L.
GENERAL GREASING
RL –levelling roller grease every 8 work hours on both ends of the roller, pumping in grease until it comes
out.
RT –rotor grease every 8 work hours, pumping a maximum of 1-2 times to avoid harm to the
internal bearing seals; The rotor is lubricated from the pulley side using the grease
nipple placed on the tube that exits from the transmission casing.
S –joint grease every 20 work hours.
P –parallelogram grease every 20 work hours.

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7.0 Machine maintenance
7.4 BELT TENSIONS
Belts are properly stretched when they deflect about 4-5 mm when an approximate 4-5 Kg.
Force F is applied in the center between the two pulleys.
It is very important to check belt tension:
make all necessary adjustments so that deflection agrees with the above-indicated value.
Check and adjustment must be done after the first 4 work hours
and subsequently at 50 hour intervals.
WARNING:
MAKE SURE THE P.T.O. IS DISENGAGED.THE MACHINE MUST BE
OPEN IN ITS WORK POSITION. THE TRACTOR MUST BE BRAKED
AND OFF OR DISCONNECTED FROM THE MACHINE WHEN
PERFORMING THESE PROCEDURES
Proceed as follows to make adjustments:
1. remove the belt cover C;
2. loose the screws V located on the support plate
of the gearbox;
3. tighten the belts by operating on the tightening screws T;
4. clamp the screws T;
5. tighten screws V;
6. reinstall the cover and fasten them with screws.
WARNING:
DO NOT WORK WITHOUT THE
BELT COVER

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7.0 Machine maintenance
REPLACING TOOLS
7.5.1 REPLACING HAMMERS
WARNING:
TO PERFORM THESE PROCEDURES,
MAKE SURE THE P.T.O. IS
DISENGAGED.
Proceed as follows:
1. Set the machine on the flat;
2. Disconnect it from the tractor;
3. Use a suitable hoist (see the weight indicated in
paragraph 3.2) hooked to a suitably large beam.
4. Hook up the machine and turn it over;
5.Thoroughly unscrew and remove bolt A;
6. Replace hammer B and install a new bolt,
being sure to insert the head of the screw into the
hexagon machined on the support.
7. Tighten strongly;
8. Turn the machine back into its normal operating
position.
7.5.2 REPLACING BLADES
WARNING:
TO PERFORM THESE PROCEDURES MAKE SURE THE P.T.O. IS DISENGAGED.
Proceed as follows:
1. set the machine on the flat;
2. disconnect it from the tractor;
3. use a suitable hoist hooked to a
suitably large beam
(see the weight indicated in paragraph 3.2).
4. hook up the machine and turn it over;
5. thoroughly unscrew and remove bolt A;
6. replace blades C and install a new bolt,
being sure to insert the head of the screw into
the hexagon machined on the support.
7. tighten strongly.
8. pay attention to the positions of bush B and
spacers D when doing these procedures:
they must be positioned exactly in the same
places they were prior to replacement;
9. turn the machine back into its normal operating position.
OUR ORIGINAL SPARE PARTS GUARANTEE COMPLETE AND CORRECT MACHINE
OPERATION.

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7.0 Machine maintenance
7.6 OPERATING TEST AFTER MAINTENANCE
It is good practice to test the machine to make sure it operates properly, and that work was done properly after
performing any maintenance and/or repairs on the machine.
Proceed as follows:
1. Connect the machine to the tractor if necessary (see paragraphs 5.2 and 5.4);
2. Make sure the machine is resting on the levelling roller but is high enough
so that the tools do not touch the ground;
3. Check that there are no extraneous persons within a 10 m range of the machine;
4. Engage the P.T.O. and gradually accelerate until you reach the 540 RPM operating speed;
Check the tools if the machine vibrates during the test (see paragraphs 7.5.1 and 7.5.2).
The rotor will need to be dynamically balanced if the machine vibrates after the tools are checked or replaced.
In this case turn to your local retailer.