Laski ATR 90 User manual

Version 03.2017
OPERATING INSTRUCTIONS
TRENCHER ATR 90

TRENCHER ATR 90
2
Foreword
Thank you very much that you have just purchased our product, the trencher TR60 HC. Our
company has been engaged in production of machines and equipment for many years and
has gained considerable experiences in this field. Quality of our machines is proven in 22
countries of Europe and Asia we export to.
This manual brings important instructions for users, i.e. instructions for putting the machine
into operation, work safety and operating experiences. You will learn how to carry out
maintenance, repairs and service and who is authorised for doing checks and other actions on
the machine.
Your local dealer will give you this manual with instructions for operation and maintenance
while taking this new machine over. Make sure if you understand everything. If not, do not
hesitate and contact your dealer and ask him for explanation. It is very important for you and
your work safety to understand all instructions given in this manual.
The firm Laski spol. s r.o. does not bear any responsibility for any claims resulting from
disobedience to the instructions given in this manual.
This operation manual includes also work safety instructions in various parts of the text. If
there is any work safety rule or instruction in general description, then this instruction is
indicated with the following symbol:

TRENCHER ATR 90
Drážkovač TR 120 H
FOREWORD..........................................................................................................2
PRODUCT IDENTIFICATION....................................................................................5
WORK SAFETY INSTRUCTIONS.....................................................................6
UTILISATION .........................................................................................................6
NOT ALLOWED USE ..............................................................................................6
GENERALLY..........................................................................................................6
RESIDUAL RISKS ...................................................................................................9
WORK SAFETY SYMBOLS....................................................................................10
NOISE AND VIBRATIONS .....................................................................................13
TECHNICAL DESCRIPTION ...................................................................................13
TRANSPORT.........................................................................................................14
PRODUCT DELIVERY ...........................................................................................15
HANDLING ..........................................................................................................15
USE........................................................................................................................16
HANDLING AND STORAGE..................................................................................16
CHECKS BEFORE OPERATION ..............................................................................17
COUPLING TO CARRIER.......................................................................................17
TRENCHING.......................................................................................................18
PUTTING INTO OPERATION .........................................................................19
EMERGENCY SITUATIONS...................................................................................21
ROUTINE MAINTENANCE ....................................................................................21
TO CHANGE OR TO TIGHTEN THE CHAIN.............................................................22
LUBRICATION......................................................................................................24
MAINTENANCE INTERVALS.................................................................................24
FAILURES AND TROUBLESHOOTING ....................................................................25
WARRANTY........................................................................................................27
SERVICE REPORT.................................................................................................28

TRENCHER ATR 90
4

TRENCHER ATR 90
5
Product Identification
Our product is identified with its serial number stamped on the type plate placed in
front of the machine jib. Upon the take-over of the product we recommend you to
fill required data in the following form (1) concerning the given product and your
dealer.
Basic product data:
Type of product:
…………………………………………………….
Serial number of product:
……………………………………………………..
Dealer's address:
……………………………………………………..
Address of authorised service:
……………………………………………………..
Date of delivery:
……………………………………………………..
Warranty expiration date:
……………………………………………………..
Interruption of warranty period:
……………………………………………………..
The product type plate is located on the machine frame behind its clamping plate.
It includes:
- manufacturer's data
- product designation
- type
- serial number
- weight of machine
- CE marking
Type plate place

TRENCHER ATR 90
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Work Safety Instructions
Utilisation
- The trencher ATR-90, as an implement coupled to a power source (hereinafter
referred to as carrier), facilitates trenching works at cables and pipelines lying
in gardens, school yards and parks without moving too much earth.
-The trench itself is up to 90 cm deep with a plain and clean unvaried profile
given by the cutting chain width. The machine is used for trenching in compact
soils with small stones in size up to 50 mm in one-man operation (operated by a
carrier driver).
-This machine is allowed to work only on flat and even terrain or up the
permissible limits of the used carrier as to its climbing ability.
-The given carrier must be fitted with a corresponding clamping plate. It
hydraulic system should provide minimum jib carrying capacity of 350 kg,
hydraulic oil pressure up to 10 MPa and oil flow of 70 l/min.
Not Allowed Use
The trencher is not allowed to be used for trenching in soils with
glass cullet, metal subjects, bars, wooden pieces, stony debris,
rubbish etc. or in concrete, bitumen and paved surfaces.
-Avoid working with inclination exceeding the limit as allowed for the used
carrier,
-It is forbidden to work if the used carrier could not provide required
parameters as to oil pressure and flow rate or if it is fitted with an incompatible
clamping plate.
-It is forbidden to work if the carrier stands on unstable terrain, steep slopes and
close to trenches with risks of instability,
-Avoid working on icy and frozen terrain (it applies also to frost-bound grassed
area).
-It is strictly forbidden to start working with removed guards.
-It is not allowed to go on working if oil temperature exceeds 65oC. First let the
hydraulic system cool down.
Generally
-Before use of this machine the user (owner) is obliged to instruct operators
with this manual and all operating instructions in a provable way.

TRENCHER ATR 90
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-This machine is allowed to be operated only by an operator who is over 18
years old, physically and mentally capable and demonstrably instructed with
its operation.
-This manual should be available and at operator's disposal any time.
-This machine is allowed to be operated only by an attendant/driver who should
have a respective driver's license (according to a carrier type).
-Persons under the influence of drugs, alcohol or medication affecting reaction
time must never work with this machine.
-Keep this machine beyond unauthorised person's and children’s reach.
-Keep this machine beyond children's and unauthorised person's reach. Avoid
their attendance while trenching. Keep them beyond hazardous area which is a
space around the machine up to 20 metres.
-Pay special attention to the area on the trencher's right side where its auger
turns.
-Every operator of this machine is fully responsible for any injury or damage
caused to the third persons within the operating reach of the machine.
-Before work make sure if necessary operating and ancillary space is free and
safe.
-Before working learn all functions of individual controls. If necessary, contact
your dealer and ask him for operator's training.
-The operator is obliged:
-to use only such a trencher which is in optimal operating condition, not
damaged through transport, storage of from previous operation,
-Do never any technical changes or any actions that are neither given in this
manual nor allowed by the manufacturer. This machine, if not correctly
installed or adjusted, may run without problems now but in the future any of
important parts could get out of order or do fatal damage.
-before trenching to learn all local regulations concerning noise and to respect
them,
-For replacement of worn or damaged parts use always original spare parts
only.
-The operator of this machine is obliged to trench on bearing and compact
surfaces only.
to stop trenching immediately if there are any undesirable objects in the soil,
to stop trenching immediately if he hears any strange noises or vibrations that
may result from contact of the cutting chain with undesirable objects bringing
usually damage of the chain. Turn the machine off and first remove these
objects.
to respect all work safety instructions.

TRENCHER ATR 90
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While taking the machine over from another person or always before work
make sure if all controls, guards and other safety elements are complete and
properly installed. They serve for your safety.
Avoid wearing free parts, such as ties, scarves and shawls, belts etc. In case of
longer hairs use always a proper head piece. Otherwise, such a person is not
allowed to operate this machine.
While working, wear always personal protective equipment –protecting shield
or goggles, protective gloves, working shoes and working clothes properly
buttoned.
This manual describes also some common troubles and failures which could
occur and which are easy to be remedied by an instructed person. Other
problems and faults should be announced directly to the manufacturer, the
LASKI Service Centre that is always ready to help you.
Before any checks or servicing stop the engine, disconnect the spark plug
cable and wait until any motion stops.
Do not put any objects or tools on the machine.
While displacing the machine on the plot the cutting chain bar must be set
horizontally and the machine operator should stand in the given attendant’s
place.
-The manufacturer does not bear responsibility for any damages or injures to
the third persons or to other equipment resulted from disobedience to
instructions given in this manual
-While handing the machine over to another person make sure if all controls,
guards and other safety elements are complete and fully functional.
-Do not remove guards and other safety elements. They serve for your safety.
-Keep the given intervals for checks of bolted joints. The first check should be
done after first three operating hours.
-Always after work clean all parts of the machine. For cleaning do not use fuel
or other oil products.
-At windy weather orientate the trencher in such direction to avoid exhaust
gases and dust bothering the operator. .
-Stop working if some parts running hot are covered with dust and soil
deposits. Clean such parts any time when required.
-Keep this machine beyond the reach of naked flames,
-Keep in mind all the parts and surfaces that may get hot from operation, i.e.
especially the engine, hydraulic elements, motion parts, bearings and exhaust
manifold parts.

TRENCHER ATR 90
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-Do not let the machine running at high speed unreasonably.
-Do not raise the auger or chain speed through changes in the gearings.
-Do not start this machine in confined or ill-ventilated spaces. Engine exhaust
gases contain poisonous carbon monoxide. Carbon monoxide is odourless,
colourless and can cause death if inhaled
-Do not use the machine under conditions of low visibility, especially at foggy
weather, when you may overlook persons coming. Operate it only at daylight
or with sufficient lighting.
-Before working learn all functions of individual controls and safety elements
and carry out functional checks before any use.
-Do not carry out any repairs that are specified for authorised services only.
-Do not carry out any repair where its solution exceeds your experiences.
-Avoid wearing free parts, such as ties, scarves and shawls, belts etc. In case of
longer hairs use always a proper head piece. Otherwise, such a person is not
allowed to operate this machine.
-While working, wear always personal protective equipment –protecting shield
or goggles, protective gloves, working shoes and working clothes properly
buttoned.
-Keep all the work safety symbols and markings legible, clear and undamaged.
Residual Risks
HOT PARTS
Some machine components (especially the engine, hydraulic elements, motion
parts, bearings and exhaust manifold parts) can get extremely hot from operation.
To prevent severe burns do not touch these parts while the engine is still running –
or immediately after its turning-off. Do not start the carrier engine with safety
guards removed.
CHAIN OR AUGER IN MOTION
When the engine is turned off, the auger and the chain continue to move for a short
while. Do not touch these parts until they stop –risk of injury.
PERSONAL SAFETY
The following personal protective equipment (P.P.E.) must be worn by the person
operating this machine and also all personnel within a 20 metre radius of the
machine:
-forestry safety helmet as to EN 397 fitted with a visor as to EN 166

TRENCHER ATR 90
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-heavy-duty gloves as to EN 388
-full ear protection as to EN 352-3
-close fitting heavy-duty fully protecting clothing
-steel toe protection boots as to EN 345
-dust mask if the ground is very dry.
NOISE
The operating noise level depends fully on the used carrier. The keeper of this
equipment is obliged to consult relevant exposition times of the operator with
concerned local authorities.
DUST
If the ground is very dry, a large amount of airborne dust might occur. In this
situation
a corresponding respiratory mask should be worn.
LIGHTING
Operate this machine only at daylight or with sufficient lighting in the workplace.
Work Safety Symbols
This article introduces work safety symbols (pictographs) used on this machine.
Under the relevant figure there is their location (position) on the machine. These
work safety symbols warn the operator against risks connected with the machine
use. Your respect to the symbol meaning is a precondition for your work safety.
The user is obliged to keep all the work safety symbols legible, clear
and undamaged. In case of any damage or illegibility ask your local
dealer or an authorised service for a new relevant pictograph.

TRENCHER ATR 90
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1
2
3
4
5
6
Read this
operating manual
before use.
Always follow
the manual while
maintaining,
servicing or
repairing the
machine and
disconnect the
spark plug cable.
Wear personal
protective
equipment –eye
protection,
hearing
protectors and
protective gloves.
Warning!
Rotating auger.
Hit and pull-in
hazard.
Keep safety
distance from
turning parts.
Warning! Keep
safety distance
from chain bar in
motion.
7
8
9
10
11
12
Keep safety
distance from
moving parts.
Warning! Hot
parts of exhaust
manifold.
Warning!
Turning parts are
running out.
Warning! Close
all guards before
starting the
machine.
Warning! Risk of
high-pressure
liquid leakage.
Lashing points.

TRENCHER ATR 90
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13
14
15
16
Wear protective
gloves.
Wear ear
protection.
Wear face
protecting shield.
Wear steel toe
protection boots.
Fig. 5 Work safety symbols on the machine
Work safety symbols on the machine

TRENCHER ATR 90
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Noise and Vibrations
This trencher is not equipped with own combustion engine. As an implement it is
intended for coupling to a carrier and any noise emissions of this machine depend
only on the used carrier type according to its power unit and technical condition.
Technical Description
The trencher ATR-90 is designed for coupling to a carrier fitted with a
corresponding clamping plate.
Trenching Device
This device consists of a link chain running on a special bar. The chain links hold
tips that cut the soil and bring it to an auger. Above the bar there is a guiding block
which helps keeping flatness at trenching. It serves also as a fixed point at
displacement of the machine. The auger puts the soil aside, approximately 15 cm
from new trench.
The chain bar is height-adjustable according to the carrier actually used. Its
hydraulically controlled continuous adjustment can provide trenches in depths as
from 60 cm to 90 cm. The guiding block for flat trenching is mounted close to the
chain bar edge. The chain tips are fitted as left and right and intended for cutting the
soil and bringing it to the auger.
Fully hydraulic control of the machine, i.e. the link chain and the auger, is based
on the carrier hydraulics according to the carrier actually used.
This hydraulic system is designed for power transmission from the carrier engine
to the working parts of the trencher. It comprises also hydraulic hoses, quick-acting
couplers and hydromotor.

TRENCHER ATR 90
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Technical Parameters
Parametr
Unit
Value
Overall length
mm
1750
Overall width:
mm
950
Overall height:
mm
750
Weight:
kg
270 –300*
Speed
m/hod
max. 40
Max. oil flow
l.min-1
70
Max. oil pressure
MPa
10
Max. trench depth
cm
60 –90, continuously
adjustable
Trench width
cm
max. 16
Trenching chain
inch
1,654“, with 64 pitches
Number of chain tips
-
16
Max. auger speed
rpm
Max. 370
Auger diameter
mm
400
*) according to the chain used
Transport
This trencher can be transported to site either on a trailer or on a low-bed truck. For
shorter distances it is also possible to let the machine coupled to the carrier.
Loading/unloading
Always perform the machine loading and unloading operation with the trailer
parked on a solid and level surface.
If uncoupled, you may use a lift truck or a tackle with min. carrying
capacity of 500 kg. Any suspension is allowed only in the given lashing
points. It applies also to lashing straps or other applicable lifting means.
Loading/unloading
Always perform the machine loading and unloading operation with the trailer
parked on a solid and level surface.

TRENCHER ATR 90
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If uncoupled, you may use a lift truck or a tackle with min. carrying capacity
of 500 kg. Any suspension is allowed only in the given lashing points. It
applies also to lashing straps or other applicable lifting means.
If coupled, follow the instructions given in the separate manual of the
carrier.
Product Delivery
-This product is delivered completely mounted and attached to a wooden pallet.
-While handling you may use a lift truck or a tackle with min. carrying capacity
of 500 kg (suspension in the given lashing points only).
-The manufacturer delivers this product shrink-wrapped. The protective foil
protects the machine against weather effects but in no case against mechanical
damage, fall etc. The protective foil is recyclable; dispose it according to valid
local regulations.
-While putting the machine aside (e.g. at reloading) we recommend to place it
under a shelter.
-While unloading put the product always on a solid and level surface.
-It is not allowed to put it on a labile base.
-It is not allowed to put any objects or tools on the machine or even to pile two
machines on each other.
Handling
After delivery unload the machine from the transport pallet as follows:
-Cut the binding band carefully. Be aware, the band is tightened up and after
cutting its both ends may “shoot out”. While cutting the band, use protective
gloves and goggles.
-Lift up the trencher slightly in order to remove the transport pallet and put it on
the ground. At lifting keep away from the place under the tackle/crane load.
-For loading or unloading use lifting means with min. carrying capacity of 500
kg.
-For coupling the trencher directly to a carrier, keep the following instructions.

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Precautions in Design
Moving parts on this machine, particularly bar, chain and auger, are located
beyond attendant’s reach. Main controls for machine operation are installed on the
carrier. While trenching, the attendant must remain in the intended attendant’s
workplace, i.e. usually the driver’s seat.
Use
Before Use
-Before first putting the cutter into operation check up the entire
machine for completeness after transport. In case of any damage or
incompleteness contact your dealer or an authorised service point.
-Exchange all damaged parts and use always original spare parts.
-Check up all bolted joints, especially on the moving parts.
-Keep all unauthorised persons or animals out of range of the machine while
working.
-Do not put the chain bar on a hard base (concrete). For putting the bar aside,
use a wooden board.
-Check up hydraulic lines for tightness and integrity.
-Before coupling check up contact areas of quick-acting couplers. Clean them if
fouled.
Handling and Storage
-When loading the trencher on a trailer, fasten retention chains, straps
or cables to the loading area. Let the chain bar rest on the floor carefully.
-While handling you may use a lift truck or a tackle with min. carrying capacity
of 500 kg (suspension in the given lashing points only).
-Store the trencher always in dry (sheltered) space to protect it against
weather effects.
-Before storage clean all parts of the machine.
-Exchange all damaged or worn parts. Use always original spare parts. For
servicing or spare parts contact your dealer or an authorised service.
-Check up hydraulic hoses for wear. Replace them if necessary or every four
years at least!

TRENCHER ATR 90
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-Protect the product against oil products. Remove any spilled oil immediately
and wipe off all oily spots.
-Keep the stored machine beyond unauthorised person's reach.
-Do not let the chain bar sink on a hard base (concrete) –for underlaying use a
wooden board.
-Always put the machine aside on a flat and solid floor
-Do not put any objects or tools on the machine.
Checks before Operation
-Before putting the trencher into operation check up the entire machine for
completeness.
-Check up all bolted joints, especially on the trenching chain.
-Check up all chain tips for completeness. If one of them is damaged, change it
immediately.
-Warning! Be always aware that the chain tips are fitted as left and right.
-Check up hydraulic hoses for wear and tightness. Replace them if necessary or
every four years at least.
-It is strictly forbidden to start working with removed guards.
-It is not allowed to carry out any modifications and technical changes on the
machine without prior permit by the manufacturer.
-It is not allowed to start machine with spilled oil on its parts.
-Before any adjustment put the machine out of operation, i.e. at idle state of the
chain and of the engine.
-Keep all unauthorised persons or animals out of range of the machine (20 m at
least) while working.
-While working, wear always personal protective equipment –protecting shield
or goggles, ear protection, protective gloves, steel toe protection boots and
working clothes properly buttoned.
Coupling to Carrier
The trencher should be coupled to a carrier that must be fitted with a corresponding
clamping plate.

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Trencher coupling to a carrier
Quick-acting clamping plate on
trencher
Any figuring as to coupling of the machine to a carrier is
informative only. The given way of coupling depends always on the
carrier actually used. To couple the machine to the carrier it is
necessary to follow the instructions as shown in the concerned manual to
the carrier!
-Lift up the safety pins on the carrier clamping plate.
-While coupling, hang up the clamping pins on the carrier clamping plate under
the hooks on the trencher plate.
-Lift up the carrier jib and let both plates come near. The trencher, resp. its chain
bar, should be approximately 20 cm above ground.
-Let both plates interlock and insert the safety pins of the carrier plate through
the holes on the trencher plate. They should go freely through the holes.
-Couple the hydraulic hoses to the corresponding couplers.
Trenching
The chain bar is height-adjustable according to the carrier actually used. Its
hydraulically controlled continuous adjustment can provide trenches in depths as
from 60 cm to 90 cm. To work in the required depth first set up a slider on the
machine used as a support to follow the ground while trenching. This slider is
mounted under the hydromotor and movable in its longitudinal grooves.
To set up the required depth proceed as follows:
-Block the carrier properly against unwished motion and lift up the jib.

TRENCHER ATR 90
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-Block the jib against unwilling sinking.
-Loosen the fixing bolts on the slider and set the required depth in its
longitudinal grooves. Afterwards, tighten the bolts properly (see fig.).
-In the required depth the slider should follow the terrain contour and be in
touch with the ground over its total length (see fig.).
Slider fixation and adjustment
Slider parallelism
Putting into Operation
-Do not use the machine under conditions of low visibility, especially at foggy
weather, when you may overlook persons coming. Operate it only at daylight
or with sufficient lighting.
-Every operator of this machine is fully responsible for any injury or damage
caused to the third persons, animals and property within the operating reach of
the machine.
-Before work first observe the working area. To ensure maximum life of the
trencher and to keep the chain tips sharp, any contacts with stones, flint brick
and other hard materials around the base of the trencher should be kept to an
absolute minimum.

TRENCHER ATR 90
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-Avoid going with the carrier over contingent obstacles that could cause its
damage.
-Avoid going or working on slopes with inclination exceeding the permissible
limit of the carrier.
-Any transport to site or dislocation on site is allowed only with the chain drive
off.
-Allow the carrier engine to run at no more than fast idle speed to warm up the
engine and hydraulic oil (especial in winter time) to reach its required oil
pressure and flow rate.
-Start working with the machine and press the chain bar slowly into the trench
to reach the required trenching depth. To reach the required depth you can
move the carrier also slightly back.
Attention! While trenching, avoid going forward without keeping
an eye on the chain motion.
While pressing the chain bar into the soil, avoid any carrier motion
forwards.
It is always necessary to adapt the carrier speed forwards to on-site
conditions, particularly to real properties of the soil. Local conditions
and soil properties may considerably differ. First set the carrier speed
slow and then speed up slowly, never conversely.
While trenching, try to keep the engine speed constant resp.
according to current machine load (listen to operating noise).
oIt is not possible to repair (renew) the already finished trench
by going through the trench repeatedly because of the soil
already put aside.
oWe recommend to trench on level grounds or downhill only.
oAvoid working along the hill contour. It may come to
undermining the slope –any angle correction of the jib is not
possible.
oObserve the working area all the time. If any person,
children or animals approach while trenching, then stop
working immediately.
oShould the trench line be straight only, first mark the
required travelling direction on the ground in order to
observe and to keep an equal distance of the carrier wheels
from the marked line.