Avantco A37265 User manual

Stump grinder
2017 1
Operator's Manual for Attachment
Stump grinder
Product number A37265
English
A423414 2017 1 EN 2017-
www.avanttecno.com

Stump grinder 2017 1

Stump grinder 2017 1
CONTENTS
1. FOREWORD ............................................................................................................................................4
Warning symbols used in this manual ............................................................................................................................... 5
2. DESIGNED PURPOSE OF USE.............................................................................................................6
3. SAFETY INSTRUCTIONS FOR USING THE ATTACHMENT........................................................7
3.1 Safe shutdown procedure.................................................................................................................................... 10
3.2 Personal protective equipment........................................................................................................................... 10
4. TECHNICAL SPECIFICATIONS ..........................................................................................................11
4.1 Safety labels and main components of the attachment.................................................................................. 11
5. ATTACHING THE ATTACHMENT ....................................................................................................13
5.1 Connecting and disconnecting hydraulic hoses............................................................................................... 14
6. INSTRUCTIONS FOR USE....................................................................................................................16
6.1 Checks before use................................................................................................................................................. 17
6.1.1 Check the operating area ............................................................................................................................ 17
6.2 Using the stump grinder....................................................................................................................................... 18
6.2.1 Correct work position................................................................................................................................. 18
6.2.2 Transport position ........................................................................................................................................ 18
6.2.3 Operating position ........................................................................................................................................ 19
6.3 Preventing and clearing blockages...................................................................................................................... 20
6.4 Material handling.................................................................................................................................................... 21
6.5 Operating on inclined terrain ............................................................................................................................. 21
6.6 Operation with the tilt adapter .......................................................................................................................... 21
6.7 Storage..................................................................................................................................................................... 22
7. MAINTENANCE AND SERVICE ..........................................................................................................23
7.1 Inspection of hydraulic components.................................................................................................................. 23
7.2 Cleaning the attachment ...................................................................................................................................... 24
7.3 Inspection of metal structures............................................................................................................................ 24
7.4 Cutting disc maintenance..................................................................................................................................... 24
8. WARRANTY TERMS..............................................................................................................................26

4 (28)
1. Foreword
Avant Tecno Oy would like to thank you for your purchase of this attachment for your Avant loader. It has
been designed and manufactured based on years of experience on product development and manufacturing.
By familiarising yourself with this manual and following the instructions, you ascertain your safety and ensure
the reliable operation and long service life of the equipment. Read the instructions carefully before starting to
use the equipment or performing maintenance.
The purpose of this manual is to help you to:
operate the equipment in a safe and efficient manner
observe and prevent any hazardous situations
keep the equipment intact and ensure a long service life
With these instructions, even an inexperienced user can use the attachment and loader safely. The manual
includes important instructions for experienced AVANT operators as well. Ensure that all persons using the
loader have received proper guidance and familiarised themselves with the manual of the loader, each
attachment that are used, and all safety instructions before using the equipment. Using the equipment for
other purposes or use in any other way than described in this manual is prohibited. Keep this manual at hand
throughout the service life of the equipment. If you sell or transfer the equipment, be sure to hand over this
manual to the new owner. If the manual is lost or damaged, you can request a new one from your Avant
dealer or from the manufacturer.
In addition to the safety instructions included in this manual, you must observe all occupational safety
regulations, local laws, and other regulations concerning the use of the equipment. Particularly the regulations
concerning the use of the equipment on public road areas must be observed. Contact your Avant dealer for
more information about local requirements before you operate the loader on road areas.
Contact your local AVANT dealer for any questions, service, spare parts or about any problems that may
occur with the operation of your machine.
This manual contains the original instructions in English. Due to continuous product development some of the
details shown in this manual may differ from your equipment. Pictures may also depict optional equipment or
features that are not currently available. We reserve the right to change the contents of the manual without
notification. Copyright © 2018 Avant Tecno Oy. All rights reserved.

5 (28)
.
Warning symbols used in this manual
The following warning symbols are used throughout this manual. They indicate factors that must be taken into
account to reduce the risk of personal injury or damage to property:
WARNING: SAFETY ALERT SYMBOL
This symbol means: “Warning, be alert! Your safety is involved!”
Carefully read the message that follows, it warns of an immediate hazard
that could cause serious personal injury.
The safety alert symbol by itself and with related safety statement
indicates important safety messages throughout this Manual. It is used to
draw attention to instructions involving your personal safety or the safety
of others. When you see this symbol, be alert, your safety is involved,
carefully read the message that follows, and inform other operators.
DANGER:
This signal word indicates a hazardous situation which, if not avoided, will cause
death or serious injury.
WARNING:
This signal word indicates a potentially hazardous situation which, if not avoided,
could cause serious injury or death.
CAUTION:
This signal word is used when minor injury could result if the instructions are not
followed properly.
This signal word indicates information about the correct operation and maintenance
of the equipment.
Failure
to observe the instructions accompanying the symbol can lead to equipment
breakdown or other property damage.

6 (28)
2. Designed purpose of use
The AVANT Stump grinder is an attachment that is designed and manufactured to be used with AVANT multi
purpose loaders that are listed in Table 1. It is an efficient and easy to operate attachment for removal of tree
stumps with an Avant loader.
The cutting disc is mounted sideways, which gives excellent visibility to the working area. The cutting disc
discharges wood waste on the right side of the loader.
The stump grinder is operated from the driver's seat of the loader, and the controls and movement of the
loaders are used to remove a tree stump.To move the grinder back and forth, either the forward and backward
drive movement of the loader can be used, or by tilting the attachment. The Stump grinder is intended to be
used in near vertical position close to the ground. The tree stump must be sawed to as close to the ground as
practical before using the stump grinder.
There are three cutting edges on the individual cutting teeth of the stump grinder. Once a tooth becomes
blunt, it is easy to take into use a sharp edge by loosening the fastening bolt and turning the tooth. In addition,
the stump grinder is equipped with a protective rubber cover which prevents the wood from flying around.
The stump grinder is not intended to be used in lifted position. It is not designed for and must not be used for
any other purpose than removal of stumps of trees that are cut as short as possible. The stump grinder must
be operated by a single operator who seated on the driver's seat, and all assisting people must stay clear from
the work area. All protective covers must be in place and personal protection equipment must be used.
The attachment has been designed to require as little maintenance as possible. The operator can perform
regular maintenance tasks. All repair work can’t be performed by the operator, and demanding repair and
maintenance operations are to be left for professional maintenance. All maintenance work must be done using
proper safety equipment. Spare parts must be identical with original specifications, which can be ensured by
using only original spare parts. A separate spare parts catalogue may be available, consult your Avant dealer.
Familiarise yourself with the manual's instructions regarding service and maintenance. Please contact your
AVANT retailer if you have additional questions about the operation or maintenance of the equipment, or if
you require spare parts or maintenance services.
Table 1 - Stump grinder - Compatibility with Avant loaders
Avant 216
218
220
220 series 2
225
225LPG
313S
320S
320S+
419
420
520
R20
423
523
e5
e6
525LPG
R28
528
530
630
R35
635
640
745
750
755i
760i
A37265 - - - - (•) - (•) ••
It is recommended to use the attachment only with loaders marked with •in Table 1. When using with models
marked with (•), full performance may not be achieved. Additional counterweights may also be required. For
compatibility with a model not shown in table, contact your Avant dealer.

7 (28)
3. Safety instructions for using the attachment
Please bear in mind that safety is the result of several factors. The loader-attachment combination is highly
powerful and improper or careless use or maintenance may cause serious personal injury or property
damage. Due to this, all operators must carefully familiarise themselves about correct use and the operator's
manuals of both the loader and the attachment before starting operation. Do not use the attachment if you
have not completely familiarised yourself with its operation and the related hazards.
DANGER
Misuse, careless use, or using an attachment that is in poor condition, may
cause risk of serious injuries.
Familiarise yourself with the controls of the loader,
correct
coupling procedure, and the correct way to operate the attachment at a safe
area. Study especially how to stop the equipment in a safe manner. Read all safety
precautions carefully.
Read all safety instructions carefully before handling the attachment
WARNING
When attaching an attachment to the loader, ensure that the locking pins of the
loader's quick attach plate are in the lower position and that they have locked
the attachment to the loader. Never lift or move an unlocked attachment.
The Stump gri
nder is designed to be used by one operator at a time. Do not let
others near the danger area of the equipment when it is in use.

Always transport the attachment as low as possible to keep the centre of gravity low,
and keep the telescopic boom retracted during driving.
Operate the stump grinder only from the driver's seat. Make sure the rubber cover is
installed. It will help to avoid flying of wood debris while using the attachment.
Use the stump grinder only to remove tree stumps. Grinding of any other material can
cause flying of debris, noise, dust, and damage to the stump grinder. The stump
grinder is not intended for cutting of trees or grinding of any other material than tree
stumps.
Impact hazard - thrown objects. Do not let bystanders stand closer than the safety
distance of 5 metres from the machine. Stop the attachment if others get within the
safety distance.
Severing and crushing hazard - strong blades rotate at high speed. Use the stump
grinder only while it is lowered against a
tree stump. Stop if others are present at
working area or get within the safety distance of 5 metres from a running attachment.
Use the attachment only if all covers in place.
Hazard of entanglement - Rotating parts. Stop the equipment following the safe
stopping procedure and lower the attachment firmly on the ground before leaving the
driver’s seat, or when other persons are present at the working area.
Never leave the driver’s seat when the attachment is running or if the auxiliary
hydraulics con
trol lever is locked on. The rotating parts of the attachment keep
rotating for a short period after the hydraulic supply has been shut off. Wait until all
parts have stopped completely before leaving the driver's seat.
The operating area must be well lit. Use the work lights of the loader and other light
sources as necessary.

8 (28)
.
WARNING
Carrying of an heavy attachment can shift the centre of gravity of the loader and lead
to tipping over of the loader. Always keep the attachment as low and close to the
mac
hine as possible with the telescopic boom completely retracted to keep the
centre of gravity low and for the best stability. Make sure to use this attachment only
with a loader model that is listed on Table 1 in this manual. USe of additional
counterweights can improve stability, consult your dealer.
Operate the controls of the loader in a slow and calm manner. Be careful when lifting
load to high level or lifting load from high. Avoid sudden changes in speed or
direction to maintain balance of the loade
r especially when handling heavy loads.
Drive slowly and carefully especially on inclined terrain or slippery surfaces.
The stability of the loader may change when leaving the driver’s seat, leading to
tipping over of the machine. Always remember that t
he boom may lower
unexpectedly due to loss of stability, mechanical fault, or if another person operates
the controls of the loader, leading to crushing hazard. The loader is not intended to
be left to keep a load elevated for longer periods. Lower the att
achment firmly on the
ground before leaving the driver's seat and never allow anyone to be under the boom
or attachment.
Lower the attachment firmly on the ground before leaving the driver’s seat. Make
sure that the attachment is properly supported duri
ng any maintenance or
inspections. Do not leave the driver’s seat when the loader boom is lifted. Going
under a raised attachment or loader boom is dangerous, as the boom may lower due
to loss of stability, mechanical fault or when other person operates th
e controls of the
loader.
When unlocking and dismounting the attachment off from the loader, ensure that it is
secured against accidental movement. To secure the attachment from tipping over
lower it firmly on the ground and disconnect only on level sur
face. Ensure the
attachment is properly supported during storage. Never climb on the attachment.
Pay attention to the surroundings and any other persons and machines moving in the
vicinity. Pay attention to the contours of the terrain and other hazards,
such as
branches and trees that can reach to the driver's area, loose rocks, and slippery
surfaces.
Make sure to use only an attachment that is in good condition. Do not modify the
attachment in any way that could affect its safety.
Shut down the loader and place the attachment to a safe position as shown in Safe
stopping procedure before any cleaning, maintenance, or adjustments.
Use the attachment only for its intended purpose. Other use may create unnecessary
safety risks, and the equipment may get damaged.
Make sure that the loader is equipped with necessary safety components, and that
they are in working condition. Seat belt must be used. If there are specific hazards
related to the operating area, use appropriate safety equipment.
Also read the safety instructions and correct use of the loader from the operator's
manual of the loader.

9 (28)
WARNING
Risk of crushing -
Never allow anyone to get under a
lifted attachment or loader boom.
Keep in mind that the
loader boom can be lowered or ti
lted even if the engine has
been shut down (crushing hazard). The loader is not intended
to be left to keep a load elevated for longer periods. Always
lower the attachment to a safe position before leaving the
driver's seat.
WARNING
Hazard of thrown objects - Keep bystanders away. Note
that the attachment can throw stones, gravel, or other objects
found in the area at high speed. Always keep a safety
distance of at least 5 metres to other persons.
WARNING
Entanglement hazard - Keep away from moving parts.
Keep a safety distance of at least 5 metres from the
attachment when it is running and stop the attachment
immediately if anyone gets too close. Beware of the rotating
parts which create entanglement hazard. Never reach into a
running att
achment by any means. Shut down the loader
engine if reaching into the work tools of the attachment.
WARNING
Beware of entanglement and crushing hazards especially when cleaning or removing
blockages. Always stop the attachment by turning the aux
iliary hydraulics control lever to
its neutral position before leaving the driver’s seat, shut down the loader engine and
release the residual pressure of the hydraulic system to prevent rotating parts from
moving when clearing a blockage.
DANGER
Wr
ong, improper, or careless use of the attachment causes serious risk of severe
injuries or death.
Familiarise yourself with the controls of the loader in a safe area. Pay
particular attention to the safe stopping of the attachment and the loader; follow th
e safe
stopping procedure shown in this manual before leaving the driver's seat.

10 (28)
CAUTION
Risk of thrown objects, loss of stability, and damage to the the equipment -
Use the
Stump grinder only for its intended purpose. Using the stump grinder for ot
her
purposes than grinding down short tree stumps can cause hazardous ejection of material,
dust, or damaged machine parts.
3.1 Safe shutdown procedure
Safe stopping of the attachment, before going near the attachment:
WARNING:Always stop the attachment
following safe stopping procedure
before leaving the driver's seat.
Safe stopping procedure prevents all
unintentional movements of the attachment. Note that the loader boom can move
down even if the engine of the loader is turned off. Safe stopping procedure:
Lower the boom and the attachment on the ground.
Shut down the loader engine and lock the parking brake.

Release residual pressure from the hydraulic system; move all hydraulic control
levers to their extreme positions a couple of times.
Prevent starting of the machine, remove ignition key.
3.2 Personal protective equipment
Remember to wear proper personal protective equipment:

The noise level at the driver's seat may exceed 85 dB(A) depending on loader
model and operating cycle. Extended exposure to
loud noise can cause
hearing impairment. Wear hearing protection while working with the loader.
Wear protective gloves.
Wear safety boots whenever working with the loader.
Wear safety glasses when handling hydraulic components.

11 (28)
4. Technical specifications
Table 2 - Stump grinder - Attachment specifications
Product number A37265
Cutting disc diameter: 540 mm
Number of teeth: 20 pcs
Total width: 840 mm
Distance of center of gravity
Horizontal from coupling plate: 370 mm
Weight: 168 kg
Recommended input of hydraulic energy: 40-60 l/min, max 20,0 MPa (200 bar)
Maximum input of hydraulic energy: 70 l/min, 22,5 MPa (225 bar)
Not for continuous use
Compatible AVANT loader models: See Table 1 on page
4.1 Safety labels and main components of the attachment
Listed below are the labels and markings on the attachment. They must be visible and readable on the
equipment. Replace any unclear or missing label. New labels are available via your retailer or contact
information provided on the cover.
To apply a new label: Clean the surface thoroughly to remove all grease. Allow it to dry completely. Peel off
the protective film of the label and press firmly to apply. Take care not to touch the glue of the label.
A46771 A46772 A46799 A46802

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Attachment identification plate A423234
Avoid storing the attachment directly on the ground to prevent rust damage and for easier
coupling procedure. Place the attachment on a pallet fork, for example.
Table 3 - Decal locations and warning messages
Decal Warning message
1 A46771 Misuse hazard -
Read instructions before
use.
2 A46772 Crushing hazard -
Do not go under a
raised attachment; stay away from raised
equipment.
3 A46799
Beware of thrown objects; keep a safe
distance from the equipment (2 m).
4 A46802 Beware of sharp blades –
never reach to
the rotating components and do not use
the equipment without all covers in
place.
5
A422566
Attachment identification plate
.
Table 4 - Stump grinder - Main components
1 Frame with quick attach brackets
2 Multi connector holder
3 Vibration dampening frame
4 Rubber protective guard
5 Tool holders (20 pcs)
6 Grinding disc
7 Lifting points for attachment

13 (28)
5. Attaching the attachment
Attaching the attachment to the loader is quick and easy, but it must be done carefully. The attachment is
mounted to the loader boom by using the quick attach plate on the loader boom and the counterpart on the
attachment.
If the attachment is not locked to the loader, it may detach from the loader and cause a hazardous situation.
The loader must not be driven and the boom must never be lifted when the attachment has not been locked.
To prevent hazardous situations, always follow the coupling procedure shown below. Also remember the
safety instructions shown in this manual. The attachment is mounted to the loader as follows:
WARNING
Crushing risk - Make sure that an unlocked attachment will not move or fall over.
Do not stay in the area between the attachment and the loader. Mount the attachment
only on level surface.
Never move or lift an attachment that has not been locked.
Avant quick coupling system:
Step 1:

Lift the quick attach plate locking pins up and turn them backwards into the slot
so that they are locked in the upper position.
If
your loader is equipped with a hydraulic attachment locking system, see
additional instructions about the use of the locking system from the relevant
manuals.

Ensure that the hydraulic hoses and the electric harness are not in the way
during installation.
Step 2:
Turn the quick attach plate hydraulically to an obliquely forward position.

Drive the loader onto the attachment. If your loader is equipped with a
telescopic boom, you can utilise this.
Align the upper pins of the loader’s quick coupling pl
ate so that they are under
the corresponding brackets of the attachment.
Step 3:
Lift the boom slightly –
pull the boom control lever backward to raise the
attachment off the ground.
Turn the boom control lever left to turn the bottom section of the
quick attach
plate onto the attachment.
Lock the locking pins manually or lock the hydraulic locking.
Always check the locking of both locking pins.

14 (28)
WARNING
Risk of crushing - Avoid tipping over the attachment.
Excessive tilting or lifting of an unl
ocked attachment increases the risk of tipping the
attachment over. Do not use the automatic locking of the locking pins when the
attachment is lifted more than one meter from the ground. If the locking pins do not
return to the normal position when tiltin
g, do not tilt or raise the attachment any more.
Lower the attachment on the ground and secure the locking manually.
WARNING
Risk of falling objects -
Prevent dropping of
attachment.
An attachment that has not been completely locked to the
loader ma
y fall on the boom or towards the operator, or
fall under the loader during driving, causing loss of
control of the loader. Never move or lift an attachment
that has not been locked. Before moving or lifting the
attachment, make sure that the locking pins
are in the
lower position and come through the fasteners on the
attachment on both sides.
WARNING
Make sure the loader is compatible with the attachment.
Stability of the loader,
possible overload of the attachment, and compatibility of loa
der control systems must be
ensured in addition to mechanical compatibility of the attachment. If you use the
attachment with a loader that is not fit to be used with the attachment model you have,
risks include tipping over, damage to attachment due to ov
erload, and risks related to
uncontrolled motion of attachment and its parts. If your loader is not listed in Table 1 on
page 6, ask your Avant dealer before using this attachment.
5.1 Connecting and disconnecting hydraulic hoses
On Avant loaders the hydraulic hoses are connected using the multi connector system. If you have an Avant
300-700 series loader with the conventional quick couplers and wish to change to the multi connector system,
contact your Avant dealer or service point for instructions or installation services.
WARNING
Risk of movement of the attachment and ejection of hydraulic oil -
Never connect
or disconnect quick couplings or other hydraulic components while the control
lever of the auxiliary hydraulics control l
ever is locked on or if the system is
pressurized.
Connecting or disconnecting the hydraulic couplings while the system is
pressurized may lead to unintended movements of the attachment, or ejection of high-
pressure fluid, which can cause serious injuries
or burns. Follow safe stopping procedure
before disconnecting hydraulics.

15 (28)
Keep all fittings as clean as possible; use the protective caps on both the attachment and
the loader. Dirt, ice, etc. may make using the fittings significantly more difficult
. Never
leave the hoses hanging on the ground; place the couplings onto the holder on the
attachment.
Connecting the multi connector system:
1.
Align the pins of the attachment connector with corresponding
holes of the loader connector. The multi conne
ctor will not
connect if the attachment connector is upside down.
2.
Connect and lock the multi connector by turning the lever towards
the loader.
The lever should move easily all the way to its locking position. If the lever does not slide smoothly, check the
alignment and position of the connector and clean the connectors. Also shut down the loader and release the
residual hydraulic pressure.
To disconnect the multi connector system:
Before disconnecting put the attachment down on a solid and even
surface.
1. Switch off the auxiliary hydraulics of the loader.
2.
While pushing unlock button, turn the lever to disconnect the
connector.
3.
After ending operation put the multi connector on its holder on the
attachment.
Disconnecting hydraulic hoses:
Before disconnecting the fittings, lower the attachment to safe position on solid and level surface. Turn the
control lever of the auxiliary hydraulics to its neutral position.
When uncoupling the attachment, always disconnect the hydraulic couplings before
unloc
king the quick attach plate, to prevent hose damage and any oil spills. Reinstall the
protective caps on the fittings to prevent impurities from entering the hydraulic system.
Releasing residual hydraulic pressure:
In case residual pressure is left in the hydraulic system of the attachment, it is often possible to disconnect the
hydraulic couplings, but it may be difficult to connect them the next time. If the fittings will not connect, the
residual pressure must be released by turning the auxiliary hydraulics control lever of the loader, when the
engine is turned off. To make sure that there will not be residual pressure in the hydraulic system of the
attachment, shut down the loader engine and move the auxiliary hydraulics control lever of the loader back
and forth before disconnecting the couplings.

16 (28)
6. Instructions for use
Practise the use of the attachment and the controls of the loader in a safe area. If you are unfamiliar with the
particular loader model, it is recommended to practice its use without any attachments.
. ..
WARNING
Hazard of thrown objects - Keep bystanders away.
Note
that the attachment can throw stones, gravel, or other objects
found in the area at high speed. Always keep a safety
distance of at least 5 metres to other persons.
. ..
WARNING
Entanglement hazard - Keep away from moving parts.
Keep a safety distance of at least 5 metres from the
attachment when it is running and stop the attachment
immediately if anyone gets too close. Beware of the rotating
parts whi
ch create entanglement hazard. Never reach into a
running attachment by any means. Shut down the loader
engine if reaching into the work tools of the attachment.
. ..
WARNING
Risk of crushing -
Ensure that the parking brake of the
loader is engaged when working near the attachment.
Use additional blocks if needed. Whenever possible, lower
the attachment firmly on the ground.

17 (28)
.
6.1 Checks before use
Check that all tool holders, teeth and stoppers are installed on the rotating disc. Replace any
damaged or missing components.
If necessary, adjust the position of a blunt tooth as described in this manual.
The vibrating dampening frame must be firm and not move when manual force is applied to the
attachment. If the rubber dampeners give in too easily, replace all four of them with new ones.
Ensure that bystanders are at a safe distance when operating the equipment. Do not let anyone to
enter danger area of the boom or to stay directly in front of the loader. Also make sure that it is safe to
reverse with the loader. Never assume that bystanders will remain where you last saw them;
especially children are often attracted to the moving equipment.
Check the general condition of the attachment and the loader, and check for possible hydraulic oil
leaks. The attachment must not be used, if there is a fault in the hydraulic system of the loader or the
attachment. Refer to Chapter 7 for maintenance instructions.
Operate the attachment and the controls of the loader only when seated on the driver’s seat. Ensure
that the loader and the attachment are used in a safe manner and as intended. Do not allow children
to operate the equipment.
Never operate the loader or attachments while under the influence of alcohol, drugs, medication that
may impair judgement or cause drowsiness, or if not otherwise medically fit to operate the equipment.
Remember correct working methods and avoid leaving the driver’s seat unnecessarily.
6.1.1 Check the operating area
Check that the tree stump is cut to a short length.
Stump grinder is intended to remove only the last bit of the tree.
Check for possible rocks or debris around the tree stump.
To keep the cutting disc in good condition, remove any loose rocks. If there are large rocks just beside
the tree stump, they may need to removed first to avoid damaging the cutting disc.
Make sure there is enough light at the work area.
You need to be able to see easily how the work progresses and what is exposed from the ground.
Inform others to stay back while you operate the stump grinder.
During the stump removal process, other people must not be within the safety distance from the
attachment.
CAUTION
Risk of thrown debris -
Choose a discharge direction away from e.g. people, roads,
pathways, or areas where people could be present. Position
the loader around the
tree stump so that the discharge is not directly towards areas where people are likely
present or walk by. Also avoid the direction of buildings, vehicles or other property that
can get damaged from flying debris.

18 (28)
.
6.2 Using the stump grinder
6.2.1 Correct work position
After you have attached the stump grinder as described in this manual and you have made all pre-work
checks, drive the loader and position the stump grinder just above a tree stump.
Push the control lever
right to ro
tate the device
towards its working
position.
Push the control lever
left to rotate the device
towards its transport
position.
6.2.2 Transport position
CAUTION
Keep the loader stable. Always
transport the stump grinder as low
and close to the grou
nd as possible.
Keep the telescopic boom retracted
during drive.

19 (28)
6.2.3 Operating position

Moving the auxiliary hydraulics control lever towards
its locking position will start the stump grinder.

You can also use the buttons of the electric
joystick (optional equipment).
Correct direction of rotation is counter-
clockwise,
when seen from the driver's sear.

To stop the stump grinder, release the auxiliary
hydraulics control lever to its neutral (centre) position
(or release buttons on electric joystick).

Moving the auxiliary hydraulics to opposite direction
will rotate the grinder disc to opposite direction. This
direction should not be used.
Recommended operating speed and maximum allowed oil flow:
Operate the attachment keeping the hydraulic flow within recommended range. Never
exceed maximum allowed input of hydraulic energy.
Avoid moving the attachment with the telescopic boom during use. Using the telescopic
boom during use will reduce the flow of hydraulic oil to the attachment, and
will cause the
grinder to stall. Lift the grinder off from the tree stump before using the telescopic boom,
or use the drive pedals to move the loader back and forward.

20 (28)
CAUTION
Risk of thrown parts - Avoid running the attachment at very high speed. O
perating
the attachment at too high speed may cause high vibrations, noise, or thrown parts from
the attachment, or damage that could lead to personal injury. See recommended input
flow in this manual.
DANGER
Risk of serious personal injuries - Never leave the equipment running unattended.
Start the attachment only when it is ready to be used. Do not go near the equipment
when another person operates the controls of the loader.
6.3 Preventing and clearing blockages
Keeping the rotating speed sufficiently high on demanding conditions is essential to avoid blockages. Wet
wood waste can get coiled around the cutting disc shaft. Keep the equipment clean, so that material will not
stick on it.
If blockage occurs, it needs to be cleared manually using suitable tools. Follow safe stopping procedure
before going near the stump grinder.
DANGER
Cutting hazard - Unexpected starting.
Clearing a blockage can start the stump grinder
unexpectedly immediately after clearing the blockage, if the auxiliary hydrau
lics of the
loader is left on.
Always stop the loader by following the safe stopping procedure before going near the
stump grinder. Never reach to the device if the cutting disc can move.
To prevent accidents, turn the auxiliary hydraulics control lever of
the loader to its neutral
position, shut down the loader engine and release the residual pressure always before
going near the attachment.
DANGER
Risk of serious personal injuries - Unexpected starting.
To make sure that the
attachment will not rota
te, disconnect the multiconnector (or hydraulic quick couplings)
before going near it.