Avantco Mini Digger 150 User manual

Digger 150 2013 2
Please read this manual carefully before using the equipment, and follow all
instructions.
Keep this manual for later reference.
Operator’s
Operator’sOperator’s
Operator’s
manual for Attachment
manual for Attachmentmanual for Attachment
manual for Attachment
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Di ig gg ge er r 1 15 50 0
Product number: 400-700-series loaders: A35317
Tilting adapter: A35320

Digger 150 2013 2
CONTENTS
1. Foreword......................................................................................................................................3
2. Designed purpose of use .............................................................................................................3
3. Safety instructions for the digger..................................................................................................4
4. Mini digger specifications.............................................................................................................5
5. Assembly of the digger.................................................................................................................7
5.1. Attaching the digger to the loader......................................................................................................... 7
5.2. Connecting and disconnecting the hydraulic fittings.............................................................................. 8
5.3. Storage position ................................................................................................................................... 9
5.4. Changing the bucket........................................................................................................................... 10
5.5. Tilting bucket adapter......................................................................................................................... 10
5.5.1.Installing the tilting bucket adapter................................................................................................. 11
5.5.2.Fitting the hydraulic hoses of the tilting adapter.............................................................................. 11
5.5.3.Electric connection (tilting bucket adapter)..................................................................................... 14
6. Instructions for use.....................................................................................................................15
7. Inspections, maintenance and servicing.....................................................................................16
7.1. Checking hydraulic components......................................................................................................... 16
7.2. Cleaning and storage of the equipment............................................................................................... 17
7.3. Lubricating points............................................................................................................................... 17
8. Main dimensions........................................................................................................................19
9. Warranty terms ..........................................................................................................................20
Appendix: EC Declaration of Conformity
This manual uses the following warning symbols to indicate factors that must be taken into account to reduce
the risk of personal injury or property damage:
WARNING:
This safety symbol refers to important safety information in this manual. It warns of
an immediate hazard that could cause serious personal injury or property damage.
Read the warning text accompanying the symbol carefully and ensure that other
operators are also familiar with the warnings, since personal safety is at stake.
Notice:
This notice symbol 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.
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. Due to continuous
product development, some of the details in this manual may differ from your equipment. We reserve the
right to change the contents of the manual without notification. Original instructions.

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1. Foreword
Avant Tecno Oy would like to thank you for your purchase of this AVANT attachment. It has been designed
and manufactured on the basis of years of experience and product development. 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.
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 and
attachment 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 the manual is lost or damaged, you can request a new one from the retailer
or manufacturer. If you sell or transfer the equipment, be sure to hand over this manual to the new owner.
2. Designed purpose of use
The AVANT Digger 150 is an attachment designed and manufactured to be suitable for use with AVANT
multi purpose loaders shown in Table 1. The digger is intended for occasional use as a quick and simple to
use digging attachment, that is also easy to transport. The digger can be attached quickly and is very
effective for its size. The robust digger can be used with several available bucket options in general
excavation, and moving and loading of soil. The digger makes use of the movements of the loader boom and
there is a hydraulic cylinder for moving the bucket.
The digger is controlled from the operator’s seat of the loader by using the controls of the boom and auxiliary
hydraulics. Excavated soil is dumped to sides by taking use of the articulation and driving of the loader, and
can also be transported further away, or loaded high thanks to its high reach. The control patterns differ from
conventional excavators, but also unexperienced operator’s, as well as operators who are used with other
typer of excavators, can easily assimilate with safe and efficient use of the controls. In addition, the operator
must get familiarised with hazards related to excavation and trenching work. Recommended options for the
most efficient use are telescopic boom on the loader and electric auxiliary hydraulics control buttons. When
using with bucket tilt adapter, also the optional attachment control switch pack is recommended. Using the
digger for other than occasional excavations with original buckets, tools or options is prohibited. The digger
must not be used for lifting of objects.
The attachment has been designed to require as little maintenance as possible. The operator can perform
regular maintenance tasks. Shown in this manual are also fitting instructions of the bucket tilting adapter, for
persons with at least basic knowledge and experience about performing work on hydraulic assemblies and
the related hazards. All fitting and maintenance tasks can’t be performed by the operator, and demanding
repair and maintenance operations should be left for professional maintenance. All maintenance work must
be done using proper safety equipment and original spare parts. Familiarise yourself with the instructions
regarding service and maintenance shown in this manual. Please contact your AVANT retailer, if you have
any additional questions about the operation or maintenance of the equipment, or if you require spare parts
or maintenance services.
Table 1 – Digger 150 A35317 compatibility with Avant loaders 745, 750
630, R35, 635, 640
520, 525LPG, R28, 528
419, 420
•
••
•
320 -
For compatibility information with a model not shown in
table, contact your Avant retailer.

4(22)
3. Safety instructions for the digger
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 lack of maintenance may cause serious personal injury or property
damage. Due to this, you should carefully familiarise yourself with the manuals of both the loader and the
attachment before starting operation. Do not use the attachment if you have not familiarised yourself with its
operation and the related hazards.
The purpose of this operator’s manual is to help you to:
•use the equipment in a safe and efficient manner
•monitor and prevent any hazardous situations
•keep the equipment intact and ensure a long service life
•When attaching the digger 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 attached to
the loader. Also check the coupling of the bucket or other equipment.
•The digger is to be used by one operator at a time. Keep others off from the work area
and away the loader.
•Do not use the digger on horizontally tilted terrain. Ensure the stability of the loader and
firmness of the ground also on even terrain.
•Note that the excavation or trench may suddenly cave in. Exercise extreme caution
when driving near ditches or embankments, and avoid driving along a ditch or trench,
as the machine could suddenly tip over if an edge caves in. Avoid driving along
trenches and keep at least a distance equal to width of a trench.
•Never leave the driver’s seat when the bucket is lifted off from the ground. Keep hands
and feet away from moving parts.
•Make sure not to tilt the digger too far up causing material to fall from the bucket on the
loader or operator’s area.
•When removing the digger from the loader, ensure that it is secured against accidental
movement. Familiarise yourself with the instructions concerning taking the digger off
from the loader and storage.
•Pay attention to the surroundings and any other persons and machines moving in the
vicinity. Pay attention to the contours of the terrain as well as other hazards, such as
loose rocks, or branches and trees that reach the driver's area.
•Always transport the digger as low and as close to the machine as possible to keep the
centre of gravity low. Turn the edge or the teeth of the bucket towards the loader.
•Shut down the loader engine before any cleaning, maintenance or adjustments.
•Do not modify the structure of the attachment in a manner that would affect its safety.
•Make sure that the loader is equipped with necessary safety equipment, and that they
are in order. Seat belt must be used. If there are specific risks at the operating area,
such as hazard of falling objects, the loader must be equipped with protective structure.
•Also read the safety instructions of the loader from the operator’s manual of the loader.
Note that both the bucket of the attachment and the loader boom move down even if
the engine has been stopped. Never go under a raised boom or the attachment.
Lower the bucket on the ground before leaving the driver’s seat.
Improper or careless use may cause serious injuries or property damages. Familiarise
yourself with the loader controls in a safe area. Pay particular attention to safe
stopping of the attachment and the loader.

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Remember to wear proper protective clothing:
•The noise level in the driver's seat exceeds 85 dB(A). Wear hearing protection while
working with the loader.
•The use of safety boots with non-slip soles is recommended while working with the
loader.
•Wear protective gloves and safety goggles when handling hydraulic hoses or
components.
4. Mini digger specifications
Table 2 – Digger 150 specifications
Product number
A35317
Maximum reach
(without telescopic boom): 1 500 mm
Weight (with 400 mm bucket): 130 kg
Standard bucket: 400 mm
Bucket coupling: Quick coupling S30-150
Tilting adapter as an option
Maximum hydraulic pressure: 22,5 MPa (225 bar)
Suitable Avant loaders: See Table 1
Several available bucket options are listed in Table 3 below. Also a tilting bucket adapter is available as an
option. Contact your AVANT dealer for availability and for more information.
Table 3 – Bucket options
A414301 A414304 A35230 A35383
Width: 250 mm 400 mm
(standard bucket) 750 mm 1000 mm
Edge: 2 teeth 3 teeth straight straight
Weight: 30 kg 35 kg 45 kg 61 kg
Bucket quick coupling

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Listed below are the markings and labels fastened to the mini digger, which must be visible on the
equipment. Replace the warning labels, if they have become unclear or detached completely. New labels are
available via your retailer or contact information provided on the cover page.
The warning labels contain important safety information and they help to identify and
remember the hazards related to the equipment. Replace damaged or missing
warning labels with new ones.
A46771 A46772 A46803
Table 4 – Decal warning messages and locations
Decal Explanation
A46771 Read instructions before use.
A46772 Do not go under a raised attachment
or loader boom; stay away from raised
equipment.
A46803 Crushing hazard, moving bucket
mechanism. Keep clear of moving
components.
Identification plate
1 Quick attach plate
2 Hydraulic hose holder
3 Lifting points
4 Multiconnector parking
5 Bucket load cylinder
6 Bucket quick coupling S30-150
7 Bucket release
8 Bucket release tool
9 Tie down point
10 Hydraulic hose holders for tilting bucket
adapter
Identification plate of the attachment
Table 5 – Main components of digger

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5. Assemb y of the digger
The digger is ready for use as delivered. Mount the attachment and its hydraulic hoses to the loader as
instructed below.
5.1. Attaching the digger to the loader
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 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. In the
worst case, the attachment may slide onto the driver along a raised boom. For this reason, the loader boom
must under no circumstances be raised over one metre when the attachment has not been fully locked. To
prevent hazardous situations, always follow the attachment mounting instructions provided in the following
pages. Also remember the safety instructions shown in Chapter 3 and additional infromation shown in the
operator’s manual of the loader. The attachment is mounted to the loader as follows:
Depending on the storage position of the digger, it may tip over easily, or it can’t be
attached as shown below. Make sure that a disconnected digger will not tip over, and
move carefully around it, staying away from tipping hazard areas. See more detailed
instructions about the correct storage position of the digger in chapter 5.3. If
necessary, use, for example, blocks of wood to prevent the digger from moving.
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 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.
•Depending on the storage position of the mini digger and the reach of
the loader, it may be necessary to assist the mounting of the attachment
by hand, if the loader is not equipped with a telescopic boom. See
Chapter 5.3 for correct uncoupling procedure and storage position.
Step 3:
•Turn the boom control lever left to turn the bottom section of the quick
attach plate onto the attachment.
•Lift the boom slightly – pull the boom control lever backward to raise the
attachment off the ground.
•Lock the locking pins manually or lock the hydraulic locking – do not use
the automatic locking pin release.

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Unlocked attachment may fall on the boom or operator,
or under the loader during driving, and cause serious
injuries. Before moving or lifting the attachment, make
sure that the locking pins are in the lower position and
come through the fasteners on both sides.
Excessive tilting or lifting of the attachment increases the risk of toppling over. Lower
the attachment onto the ground and secure the locking manually. Do not use the
automatic return of the locking pins.
5.2. Connecting and disconnecting hydraulic fittings
The default connector for hydraulic couplings is the multiconnector system. If you want to change the type of
the hydraulic couplings of the attachment or the loader, contact your Avant dealer or service point for
instructions or installation services.
Never connect or disconnect quick couplings or other hydraulic components while the
control lever of the auxiliary hydraulics control lever 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.
Keep the couplings 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 multiconnector onto its holder.
Connecting the multiconnector system:
Align the pins of the attachment connector with corresponding holes of
the loader connector. The multiconnector will not connect if the
attachment connector is upside down. Connect and lock the
multiconnector 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 aligment and position of the
connector and clean the connectors. Also shut down the loader and
release the residual hydraulic pressure.
Disconnecting the hydraulics:
Before disconnecting the fittings, lower the attachment on solid and level surface. See instructions about
storage of the digger from Chapter 5.3. Turn the control lever of the auxiliary hydraulics to its neutral position
and release residual pressure.
When removing the attachment, always disconnect the hydraulic couplings before
unlocking 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.

9(22)
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 before
disconnecting the couplings.
Connecting standard quick couplings (alternative connection type for some loader models):
Before connecting or disconnecting the standard quick couplings, shut down the loader engine and release
the residual pressure. The standard quick couplings will not connect in case there is pressure in the system.
To connect and disconnect the standard couplings, move the collar at
the end of the female fitting. The hoses should be connected so that the
coupling equipped with a coloured cap is connected to the
coresponding coupling of the loader. Note that the protective caps on
the loader and the attachment can be fastened to each other during
operation to reduce the accumulation of dirt. When disconnecting the
standard quick couplings a small amount of oil may drip from the
couplings. Wear protective gloves and have some cloth at hand to keep
the equipment clean.
5.3. Unattaching the digger and storage position
Correct storage position:
Before disconnecting the digger, turn the bucket so
that it will be in level with the digger frame, or tilted
slightly above, as shown in adjacent figure. In this
way it will be easy to connect the digger to the
loader. Store the digger on level ground on a pallet,
for example, so that it is easier to attach, and will
not be in contact with ground.
If the digger is left in a position shown in the
adjacent figure, it’s centre of gravity will be
high from ground and the digger may tip
over easily, causing hazards of crushing
and impact to anyone near the attachment.
Storage in any other position than shown
above will result in hazard of tipping over
and is prohibited. Follow the storage
instructions.
A loader that is not equipped with a telescopic boom:
If the loader is not equipped with a telescopic boom, and the digger is stored directly against the ground, the
loader may not reach the digger and it has to be lifted manually on the quick attach pins of the loader. When
lifting the digger in order to attach it to the loader, it can be lifted manually slightly from its cylinder, and the
lifting is easy, when the digger is stored with bucket raised slightly up, as shown in figure on previous page.
Drive the loader as close to the quick attach plate of the digger and tilt the attachment plate of the loader
forward to minimise lifting height.

10(22)
When removing the attachment, always disconnect the hydraulic couplings before
unlocking 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.
Avoid storing the digger directly against the ground for long periods to avoid damage
from corrosion. See chapter 7 for maintenance instructions before long storage
periods.
5.4. Changing the bucket
The bucket is connected by a standard S30-150 tool-operated quick coupling system. Available bucket
options are shown in table 3 on page 5.
Keep the digger attached to the loader for the best stability and to allow to utilise the movements of the
digger.
1. Lower the bucket close to the ground on it’s flat
bottom as shown in adjacent figure.
2. Use the provided 12 mm Allen key to rotate the
bucket locking nut counter-clockwise. Watch out
for moving of the bucket and prevent possible
swinging.
3. Lower the bucket and couple another by utilizing
the movements of the loader boom. Tighten the
locking nut securely.
5.5. Tilting bucket adapter
With the tilting adapter, a grading bucket can be used to
level the ground surface to desired slopes or, for example, to
dig a ditch. The tilting adapter includes the same S30-150
quick release system for the bucket, so the same buckets
can be used with the tilting system.
The tilting adapter kit A35320 includes all necessary
components needed in installation. The digger is equipped
with necessary fastening points and holes for installation of
hydraulic hoses. Installation includes assembling hydraulic
components, which requires special attention and is limited
to qualified persons.
Qualification requirements for installation work:
Knowledge and skills about hydraulic assemblies are required for making the installation. It is recommended
to leave the installation of hydraulic components to qualified service technicians. The manufacturer or its
representative is not responsible for damages, losses, or injuries resulted from incorrect or incomplete
installations. Some work sites may have special regulations concerning qualification requirements. Contact
your nearest Avant dealer or service point, if you have any additional questions or require installation
services.
Tilting bucket adapter kit A35320
(optional equipment)

11(22)
5.5.1. Installing the tilting bucket adapter
1. Remove the bucket as shown above.
2. Relese the residual pressure of the system and disconnect
hydraulic couplings. Apply parking brake.
3. Remove two pivot pins holding the standard quick release
system.
•To remove the pins, use a soft hammer or a block of
wood to soften the hits so that the pins will not get
damaged. Do not hit directly at the pins. Make sure that
the digger is properly supported.
4. Fit the tilting adapter and install its hydraulic components
and electric harness as shown in following pages.
5. Grease the pivot pins before use.
5.5.2. Assembling the hydraulic components of the tilting adapter
Clean the equipment thoroughly before starting the installation of hydraulic components and make sure that
i.e. dirt, dust or water will not enter the hydraulic components or the hydraulic oil. Keep the protective covers
in place until the components can be installed directly. Follow safety procedures and wear proper personal
protective equipment.
The safety procedures concerning hydraulic assemblies apply both when installing new
components or when modifying existing hydraulic systems. The following installation
instructions include the necessary information needed in installation, but installation or
modification work are allowed only if the person doing them can perform them safely.
The following safety procedures and general safety principles regarding hydraulic
systems must be followed. Contact service point for installation services.
Protect the environment from leaking of hydraulic oil and prevent oil from draining on the
ground. Keep any loosened hydraulic hose in an upright position or plugged, so that they
will leak as little as possible.
Safety instructions for hydraulic assemblies:
High-pressure ejection of fluid may penetrate skin
and cause serious injuries. Before handling
hydraulic components, make sure that the hydraulic
system of the attachment and the loader are
completely depressurized. Never handle
pressurized components. Do not hold your hand
tightly around or near a fitting when tightening or
opening it. Seek medical attention immediately in
case hydraulic fluid is injected through the skin. Also
general skin contact with the oil can be harmful.
Always wear protective gloves, safety goggles and
protective clothing. Depressurize the hydraulic
systems completely.

12(22)
Make sure the attachment is securely lowered on
the ground. Any part of the attachment must not be
supported only by hydraulic pressure or hydraulic
cylinders. Do not loosen any fitting as long as any
part of the attachment may move as a result. Use
additional supports as necessary. Lower the
attachment securely on the ground, shut down the
loader engine and set the moving components so
that they will not cause hydraulic pressure to the
system.
Before installation:
1. Allow the hydraulic systems of the loader and of the attachment to cool down completely before any
work on hydraulic systems.
2. Make sure that the loader boom or any other part of the attachment can’t move causing crushing or
pinching hazards:
•Lower the loader boom to its lower position and lower the attachment firmly on the ground. For
the best stability, keep the broom locked on the loader.
•Set all moving components to a position where they are not supported by hydraulic cylinders.
Use additional supports or lifting equipment as needed.
3. Shut down the loader engine.
4. Move the auxiliary hydraulics control lever to its extreme positions several times to release residual
pressure.
5. Uncouple the multiconnector or quick couplings from the auxiliary hydraulics of the loader to prevent
draining of hydraulic oil.
Fitting the hydraulic components:
1. Pre-assemble the selector valve at a clean location. The components are oily for storage.
Leave the elbow fittings 3 loose and keep the screws ready.
Part Name Part number pcs
1 Selection valve A65099 1
2 Basic fitting 64041 6
3 Elbow fitting 64043 2
4Hexagonal screw
M6*90 72127 2
5 Washer 71680 2
6 Hexagonal nut M6 72319 2
2. Disconnect the bucket cylinder hoses from near the hose clamp at the quick attach plate and
loosen the clamps (1 in the following figure). Also remove the connector nipples from the
hoses (2).
3. Fit the hydraulic hoses of the tilting adapter; note the seals shown in the figure below.
Table 6 – Selector valve components
Assembling the selector valve
Seals, fitting hoses to a cylinder

13(22)
4. Bolt the selector valve to the holes of the quick
attach plate (3).
5. Connect the hoses as shown in the adjacent
figure. Make note of tightening instructions of
hydraulic fittings shown below.
6. Connect the first part of the electric harness to the
selector valve, and pass the cable within the
protective plastic spiral of hydraulic hoses so that
the connector will reach the connector of the
loader, along with the hoses.
1 Holder for bucket cylinder hoses
2Bucket hose connector, to be
removed
3 Fitting holes for selector valve
4 Holder for bucket cylinder hoses
5 Holders for tilt cylinder hoses
Tightening hydraulic fittings
Tighten the fittings carefully according to given instructions and safety procedures. Keep in
mind that over tightening will break a fitting. Tighten basic fittings carefully with hand tools using
moderate torque. The elbow fittings should be tightened at last, after hoses have been fitted to
their clamps.
Lubricate the inner surfaces and threads of the fittings. Turn the tapered JIC-type fittings with
fingers or lightly with tools as far as possible. When noticing clear increase in needed force,
tighten fitting by turning 1/3 to 1/2 turns using tools. The fitting is not tightened by torque and it
will not need a lot of force at any point when tightening. Overtightening will break the fitting. Try
to twist the hydraulic hose by hands after tightening, the fitting should stay firm.
Test to find any leaks
- Wipe the hydraulic components clean to find leaks more easily.
- Place a piece of cardboard below the fittings to detect leaks.
- Start the engine. While running on idle, operate the auxiliary hydraulics control lever briefly a
couple of times. Switch the electric switch of the harness and operate the auxiliary hydraulics
again. Shut down the engine, depressurize the hydraulics, and check for any sign of leak.
Tighten if necessary.
- Repeat the test by gradually increasing engine rpm and operating time. Use both directions of
the auxiliary hydraulics control lever.
Before checking for leakages, or going near any hydraulic fitting, to avoid possible
ejection of pressurized hydraulic oil:
■Shut down the loader engine
■Depressurize the hydraulic system completely
Fitting of components and
connection principle of hydraulic
hoses
Table 7 – Locations of fitting components

14(22)
Test the tightness of the hydraulic fittings carefully. Use idle rpm when starting the first
time and keep a safe distance because of the risk of hydraulic fluid ejection. Shut down
the loader and release the residual pressure before checking for leaks. Never test the
tightness of the hydraulic components by placing hands near the fittings. Never tighten
a pressurized hydraulic fitting, since the fitting may break and the released oil may
cause serious injuries. Wear eye protection and other personal protective equipment.
Test the movements of the loader boom and the attachment
After tightening the hydraulic components, test the movements of the attachment and the loader boom
thoroughly. After installing and testing the hydraulic components, check that the hydraulic hoses can not get
stretched, pinched, or against any sharp edge, in any position of the loader boom or the attachment.
De-airing the hydraulic system
At first the cylinder and the hoses may have air trapped in them causing the cylinders to move inaccurately.
The hydraulic system will de-air itself when using the extreme positions of cylinders.
5.5.3. Electric connection (tilting bucket adapter)
To operate the tilting adapter, the cable harness of the selector valve must be connected to the loader. There
are two options for the electrical connection:
- The optional attachment control switch pack,
available for 400-700 loader models, is
recommended. In this case, the cable harness is
connected to the socket next to hydraulic
connectors. The selection between bucket
load/dump and tilting operation is made with
switch 1 of the control pack.
- Alternatively the cable harness A35358,
delivered with the attachment and equipped with
a two-position switch, is connected to the power
plug on the loader. Select the location of the
switch in the cab to ensure that it is easily
accessible but will not be used inadvertently.
Instructions about the power outlet of the loader can be found in the operator’s manual of the loader. Route
the selected cable in a way that it cannot get stuck or squeezed or stretch when the equipment moves. With
the help of the attachment control switch pack available for the loader, the attachment control switches are
easily accessible at the end of the boom control lever.
Connects to power
outlet of loader
Selector switch:
Use of bucket / tilt cylinder

15(22)
6. Instructions for use
After the digger and its hydraulic hoses are connected according to the instructions, work can be started.
Practise the use of the digger at safe area and familiarise yourself with the controls of the loader-digger
combination, safety instructions and safe working practises.
•Check that the digger is intact and that all obstacles, including any hidden ones, have been removed
from the working area before operation. Remember correct working methods and avoid leaving the
driver’s seat unnecessarily.
•Make sure that it safe to dig at the location. Find out if there are electric cables, water lines or similar
at a depth that can be reached with the digger.
•Ensure that the loader and the attachment are used in a safe manner and as intended. Do not allow
children to operate the machine.
•Check regularly to ensure there are no hydraulic leaks. Refer to Section 7 for maintenance
instructions.
•Operate the attachment only when sitting on the driver's seat.
Check the operating area before using the digger:
•Check that bystanders are at safe distance from the equipment. Do not let others
to stay closer than five meters from the equipment, the boom danger area or
directly in front of the loader.
•Make sure that there are no electric cables, water lines or similar obstacles within
the reach of the equipment. If unsure, contact the property owner, town services
and i.e. local electric, water, and gas companies. Find out about local rules and
requirements before any excavation work.
A cave-in hazard is present at or near an excavation or trench. Do not drive near the
edges of an excavation or allow others to enter the working area. Avoid especially driving
along a trench. Be careful not to dig from too near of the machine because of possibility
of caving in or pulling the loader into the excavation.
When working at i.e. construction sites, falling objects may
present a hazard, and in many cases, a falling objects
protective structure (FOPS) must be fitted on the loader. Find
out about necessary safety equipment at work site. Ask your
retailer for the availability and installing of the protective roof.
Efficient use of the digger
Digging work is always started with thorough inspection of the site and planning the work in advance. Things
to consider include at least the following:
- Inclinations and loader capabilities
- Digging movements and reach of the digger
- Where to dump or transport soil
- Need to enter the excavation or trench and protection from cave-ins
- Maintaining the stability of the loader at all times
- Possible hazards exposed during excavation

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The bucket of the digger is controlled by the auxiliary hydraulics control lever of the loader, or the
electric joystick buttons. When connected correctly, the bucket will close, when moving the auxiliary
hydraulics control lever towards it’s locking position. The digger can be used with 1- or 2-pump
setting, as needed. Keep the loader engine rpm as low as the working conditions allow. For the best
reach, use the telescopic boom
When digging, the frame articulation should be kept straight to maintain balance of the loader when
using the digger at the greatest load. Digging with the digger is the most efficient when the bucket is
pulled towards the loader, while keeping the edge of the bucket at an angle that allows the edge to
cut the soil in the most effective way. Pull the edge of the bucket towards the loader with the boom
control lever and close the bucket early to fill it. The bucket should not be pressed too hard directly
downwards, as this would result only in lifting the front tires of the loader, and the loader will not
remain in it’s place. Also, pulling the bucket towards the loader and filling it by cutting a layer from
the soil is efficient, if the operating conditions allow.
When the bucket has been filled by either colsing it or pulling, move the material to the side by
turning or driving with the loader. Digging hard or compacted soil is more effective, when only the
boom and bucket controls are used for digging. Pulling the bucket with driving motion of the loader is
effective in some cases, depending on the needed force and grip between loader tyres and surface.
Because of the reach capability of the digger, the bucket can be moved to a position in
where it’s teeth will hit the loader. In normal operation it is unlikely to hit the loader, but when
working at extreme reach, or close to the loader, the possibility of reaching the frame of the
loader must be kept in mind. Familiarise yourself with the movements of the digger before
starting work.
7. Inspections, maintenance and servicing
The attachment is designed to be as maintenance free as possible. Continuous maintenance includes
regular cleaning and lubrication of the equipment. Also the condition of the hydraulic hoses and components
should be monitored. Due to crushing hazard caused by the movements of the loader boom and the digger
bucket, all maintenance work must be done when the attachment has been lowered on the ground and the
residual pressure has been released.
Ensure the stability of the attachment also when it is attached to the loader. All
maintenance procedures must be performed when the digger and the loader boom have
been lowered down completely. The boom may lower by itself causing risk of serious
injuries.
7.1. Checking hydraulic components
Check the condition of the hydraulic hoses and components when the engine has been turned off and the
pressure has been relieved. Repair all leaks immediately after detecting them; a small leak can quickly grow
into a big one. Do not use the equipment, if you have discovered a fault in the hydraulic system. Leaking
hydraulic fluid may cause burns or penetrate the skin and cause serious injuries. Hydraulic fluid is also
harmful to the environment.
Never handle hydraulic components when the
hydraulic system is pressurized, since a fitting may
break and the released oil may cause serious
injuries. Abrupt movement of the machine may
cause crushing hazard. Do not use the equipment, if
you have discovered a fault in the hydraulic system.

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Check hoses visually for cracks or abrasions. Monitor the wearing of the hoses and stop the use, if the
surface layer of any hose has worn off. The lifetime of the hoses is limited and the hoses are marked with
date of expiration. After this, the hoses must be replaced.
If there are signs of leaking, to check the component, place a piece of cardboard in the area where a leak is
suspected. Finding any of these faults means that the hydraulic hose or component in question must be
replaced. Spare parts are available from your nearest AVANT retailer or service point. Leave the repairing
task to service professionals, if not certain about how to perform the tasks safely. Wear protective gloves,
clothing and safety goggles.
7.2. Cleaning and storage of the equipment
Clean the digger regularly. You may use a pressure washer and mild detergent. Do not use strong solvents
or spray directly at the hydraulic components or at the labels on the attachment either. Lubricate the
lubrication points on the attachment after washing, shown in section 7.3.
Do not let water to stay in the bucket. For longer storage periods, touch up the paint where needed, grease
the lubrication points and oil the visible parts of hydraulic cylinder shafts to prevent rust damage. For
storage, place the attachment so that it is not directly against the ground, i.e. on blocks of wood or a pallet,
as shown in chapter 5.3.
7.3. Lubricating points
The total number of lubricating points is 7, or 11, if the tilting adapter is fitted. The lubrication points are
shown on the next page, hidden ones are pointed with arrows. Small amount of lubricant should be added
every 5-10 hours of use. Lubricant should be added more frequently to the nipples that are close to the
bucket. All lubrication nipples are standard R1/8” nipples. Replace any damaged nipples. Oil also the screw
of the bucket coupling regularly.
Lubricant must be added at least every 10 operating hours, and more often in
demanding conditions. Clean the end of the nipple before greasing. Only add the
grease amount of a couple of grease press pushes at a time.

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Bucket tilt adapter Bucket tilt adapter
Lubricating points:
Bucket cylinder and bucket quick
coupling
Bucket tilt adapter

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8. Main dimensions

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9. Warranty terms
Avant Tecno Oy grants a warranty of one year (12 months) for the attachment from the date of purchase.
The warranty covers repair costs as follows:
•Work costs are covered, if the repair is not performed at the factory.
•The factory replaces any defective components or consumables.
The factory may reimburse the price of components purchased by the customer in special cases that have been agreed in
advance.
The warranty does not cover:
•Normal maintenance work, such as the replacement of blades or the belts, or parts and consumables required for it.
•Damages caused by unusual operating conditions or ways of use, negligence, structural changes made without the
consent of Avant Tecno Oy, use of non-original parts or lack of maintenance.
•Consequences of a defect, such as interruption of work or other possible additional damages.
•Travel and/or freight costs caused by the repair.