Atlas Copco ORKA 350/450 Maintenance and service guide

Safety and operating instructions
Floor saw
© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
ORKA

Contents
Introduction........................................................................5
About the Safety and operating instructions..........................................5
Safety instructions.................................................................6
Safety signal words..............................................................6
Personal precautions and qualifications...........................................6
Personal protective equipment...................................................6
Drugs, alcohol or medication....................................................6
Operation, precautions...........................................................6
Transport, precautions..........................................................10
Maintenance, precautions.......................................................10
Storage, precautions............................................................10
Overview.........................................................................11
Design and function............................................................11
Main parts.....................................................................11
Labels.........................................................................11
Dataplate....................................................................11
Noise level label..............................................................11
Liftingpointlabel..............................................................12
Safety label..................................................................12
Operation.........................................................................12
Fitting the blade................................................................12
Operation......................................................................13
Preparations.................................................................13
Cutting depth.................................................................13
Stopsduringoperating.........................................................13
Starting the engine,Honda.....................................................13
Starting the engine,Lombardini.................................................14
Stopping the machine.........................................................15
Maintenance......................................................................15
Every 8 hours of operation (daily)................................................15
Adjusting the belt..............................................................15
Every 20 hours of operation (weekly).............................................16
Changing the engine oil and air filter, Honda. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Changing the engine oil and air filter, Lombardini. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Every 100 hours of operation (monthly)..........................................17
Checkingsparkplug,Honda....................................................17
Every 250 hours of operation (every third month).................................17
Every 500 hours of operation (yearly)............................................18
Disposal..........................................................................18
Storage...........................................................................18
Troubleshooting...................................................................19
Technical data.....................................................................20
Machine data...................................................................20
Weights and dimensions........................................................20
Noise data.....................................................................20
Noise and vibration declaration statement........................................20
EC Declaration of Conformity......................................................22
3© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
ContentsORKA

EC Declaration of Conformity ...................................................22
© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
4
ORKAContents

Introduction
Thank you for choosing a product from Atlas Copco. Since 1873, we have been
committed to finding new and better ways of fulfilling our customers' needs.
Through the years, we have developed innovative and ergonomic product
designs that have helped customers improve and rationalize their daily work.
Atlas Copco has a strong global sales and service network, consisting of
customer centers and distributors worldwide. Our experts are highly trained
professionals with extensive product knowledge and application experience.
In all corners of the world, we can offer product support and expertise to ensure
that our customers can work at maximum efficiency at all times.
For more information please visit: www.atlascopco.com
Construction Tools EOOD
7000 Rousse
Bulgaria
About the Safety and operating
instructions
The aim of the instructions is to provide you with knowledge of how to use the
machine in an efficient, safe way. The instructions also give you advice and
tell you how to perform regular maintenance on the machine.
Before using the machine for the first time you must read these instructions
carefully and understand all of them.
5© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
Safety and operating instructionsORKA

Safety instructions
To reduce the risk of serious injury or death to
yourself or others, read and understand the Safety
and operating instruction before installing, operating,
repairing, maintaining, or changing accessories on
the machine.
Post this Safety and operating instruction at work
locations, provide copies to employees, and make
sure that everyone reads the Safety and operating
instruction before operating or servicing the machine.
In addition, the operator or the operator's employer
must assess the specific risks that may be present
as a result of each use of the machine.
Safety signal words
The safety signal words Danger, Warning and
Caution have the following meanings:
Indicates a hazardous situation
which, if not avoided, will result
in death or serious injury.
DANGER
Indicates a hazardous situation
which, if not avoided, could
result in death or serious injury.
WARNING
Indicates a hazardous situation
which, if not avoided, could
result in minor or moderate
injury.
CAUTION
Personal precautions and
qualifications
Only qualified and trained persons may operate or
maintain the machine. They must be physically able
to handle the bulk, weight, and power of the machine.
Always use your common sense and good
judgement.
Personal protective equipment
Always use approved protective equipment.
Operators and all other persons in the working area
must wear protective equipment, including at a
minimum:
●Protective helmet
●Hearing protection
●Impact resistant eye protection with side protection
●Respiratory protection when appropriate
●Protective gloves
●Proper protective boots
●Appropriate work overall or similar clothing (not
loose-fitting) that covers your arms and legs.
Drugs, alcohol or medication
WARNING Drugs, alcohol or medication
Drugs, alcohol or medication may impair your
judgment and powers of concentration. Poor
reactions and incorrect assessments can lead to
severe accidents or death.
►Never use the machine when you are tired or
under the influence of drugs, alcohol or
medication.
►No person who is under the influence of drugs,
alcohol or medication may operate the machine.
Operation, precautions
DANGER Explosion hazard
If a warm machine or exhaust pipe comes into
contact with explosives, an explosion could occur.
During operating with certain materials, sparks and
ignition can occur. Explosions will lead to severe
injuries or death.
►Never operate the machine in any explosive
environment.
►Never use the machine near flammable materials,
fumes or dust.
►Make sure that there are no undetected sources
of gas or explosives.
►Avoid contact with the warm exhaust pipe or the
bottom of the machine.
DANGER Fire hazard
If a fire starts in the machine, it can cause injury.
►If possible use an ABE-class powder extinguisher,
otherwise use a BE-type carbon dioxide fire
extinguisher.
WARNING Cutting blade hazard
A cutting blade may burst and cause personal injury
or death.
►Check that no persons are within the safety
distance, which is 15 m (49 ft). Never start cutting
until the working zone is clear.
►Never use a cutting blade with a lower speed
rating than the machine's.
►Inspect the disc before usage, check that it is not
chipped, cracked or show signs of other defects.
►Check that the cutting blade is fitted correctly and
does not show signs of damage.
►Always ensure that the guard is in place, is in good
condition and correctly fitted before starting the
machine.
►Ensure that the disc safety clamps are in place.
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ORKASafety and operating instructions

►Never use a cutting blade for any other purpose
than it is intended for.
DANGER Fuel hazard
The fuel is flammable and fuel fumes can explode
when ignited, causing serious injury or death.
►Protect your skin from contact with the fuel. If fuel
has penetrated the skin, consult a qualified health
professional.
►Never remove the filler cap, or fill the fuel tank
when the machine is hot.
►Fill the fuel tank outdoors or in a clean and well
ventilated place, free from sparks and open
flames. Fill the fuel tank at least ten meters (30
feet) from the place where the machine is to be
used.
►Release the filler cap slowly to let pressure
escape.
►Never overfill the fuel tank.
►Make sure the filler cap is screwed on when the
machine is used.
►Avoid spilling fuel on the machine, wipe off any
spilled fuel.
►Check regularly for fuel leaks. Never use the
machine if it is leaking fuel.
►Never use the machine in the proximity of material
that can generate sparks. Remove all hot or
spark-generating devices before starting the
machine.
►Never smoke when filling the fuel tank or when
working with the machine or servicing it.
►Only store fuel in a container that is specially
constructed and approved for the purpose.
►Consumed fuel and oil containers must be taken
care of and returned to the retailer.
►Never use your fingers to check for fluid leaks.
DANGER Explosion hazard
If a warm machine comes into contact with
explosives, an explosion could occur. During
operating with certain materials, sparks and ignition
can occur. Explosions will lead to severe injuries or
death.
►Never operate the machine in any explosive
environment.
►Never use the machine near flammable materials,
fumes or dust.
►Make sure that there are no undetected sources
of gas or explosives.
DANGER Exhaust gas hazard
The exhaust gas from the machine’s combustion
engine contains carbon monoxide which is
poisonous, and chemicals known to the State of
California and other authorities to cause cancer, birth
defects, or other reproductive harm. Inhalation of
exhaust fumes can cause serious injury, illness, or
death.
►Never inhale exhaust fumes.
►Ensure good ventilation (extraction of air by fan if
necessary).
WARNING Unexpected movements
The machine is exposed to heavy strains during
operation. If the machine breaks or gets stuck, there
may be sudden and unexpected movement that can
cause injuries.
►Always inspect the machine prior to use. Never
use the machine if you suspect that it is damaged.
►Make sure that the handle is clean and free of
grease and oil.
►Keep your feet away from the machine.
►Never sit on the machine.
►Never strike or abuse the machine.
►Pay attention and look at what you are doing.
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Safety and operating instructionsORKA

WARNING Dust and fume hazard
Dusts and/or fumes generated or dispersed when
using the machine may cause serious and permanent
respiratory disease, illness, or other bodily injury (for
example, silicosis or other irreversible lung disease
that can be fatal, cancer, birth defects, and/or skin
inflammation).
Some dusts and fumes created by compaction work
contain substances known to the State of California
and other authorities to cause respiratory disease,
cancer, birth defects, or other reproductive harm.
Some examples of such substances are:
●Crystalline silica, cement, and other masonry
products.
●Arsenic and chromium from chemically-treated
rubber.
●Lead from lead-based paints.
Dust and fumes in the air can be invisible to the
naked eye, so do not rely on eye sight to determine
if there is dust or fumes are the air.
To reduce the risk of exposure to dust and fumes,
do all of the following:
►Perform site-specific risk assessment. The risk
assessment must include dust and fumes created
by the use of the machine and the potential for
disturbing existing dust.
►Use proper engineering controls to minimize the
amount of dust and fumes in the air and to
minimize build-up on equipment, surfaces,
clothing, and body parts. Examples of controls
include: exhaust ventilation and dust collection
systems, water sprays, and wet drilling. Control
dusts and fumes at the source where possible.
Make sure that controls are properly installed,
maintained and correctly used.
►Wear, maintain and correctly use respiratory
protection as instructed by your employer and as
required by occupational health and safety
regulations. The respiratory protection must be
effective for the type of substance at issue (and if
applicable, approved by relevant governmental
authority).
►Work in a well ventilated area.
►If the machine has an exhaust, direct the exhaust
so as to reduce disturbance of dust in a dust filled
environment.
►Operate and maintain the machine as
recommended in the operating and safety
instructions
►Wear washable or disposable protective clothes
at the worksite, and shower and change into clean
clothes before leaving the worksite to reduce
exposure of dust and fumes to yourself, other
persons, cars, homes, and other areas.
►Avoid eating, drinking, and using tobacco products
in areas where there is dust or fumes.
►Wash your hands and face thoroughly as soon as
possible upon leaving the exposure area, and
always before eating, drinking, using tobacco
products, or making contact with other persons.
►Comply with all applicable laws and regulations,
including occupational health and safety
regulations.
►Participate in air monitoring, medical examination
programs, and health and safety training programs
provided by your employer or trade organizations
and in accordance with occupational health and
safety regulations and recommendations. Consult
with physicians experienced in relevant
occupational medicine.
►Work with your employer and trade organization
to reduce dust and fume exposure at the worksite
and to reduce the risks. Effective health and safety
programs, policies and procedures for protecting
workers and others against harmful exposure to
dust and fumes must be established and
implemented based on advice from health and
safety experts. Consult with experts.
WARNING Projectiles
Failure of the work piece, of accessories, or even of
the machine itself may generate high velocity
projectiles. During operating, splinters or other
particles from the compacted material may become
projectiles and cause personal injury by striking the
operator or other persons. To reduce these risk:
►Use approved personal protective equipment and
safety helmet, including impact resistant eye
protection with side protection.
►Make sure that no unauthorised persons trespass
into the working zone.
►Keep the workplace free from foreign objects.
WARNING Motion hazards
When using the machine to perform work-related
activities, you may experience discomfort in the
hands, arms, shoulders, neck, or other parts of the
body.
►Adopt a comfortable posture while maintaining
secure footing and avoiding awkward off-balanced
postures.
►Changing posture during extended tasks may help
avoid discomfort and fatigue.
►In case of persistent or recurring symptoms,
consult a qualified health professional.
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ORKASafety and operating instructions

WARNING Vibration hazards
Normal and proper use of the machine exposes the
operator to vibration. Regular and frequent exposure
to vibration may cause, contribute to, or aggravate
injury or disorders to the operator’s fingers, hands,
wrists, arms, shoulders and/or nerves and blood
supply or other body parts, including debilitating
and/or permanent injuries or disorders that may
develop gradually over periods of weeks, months, or
years. Such injuries or disorders may include damage
to the blood circulatory system, damage to the
nervous system, damage to joints, and possibly
damage to other body structures.
If numbness, persistent recurring discomfort, burning
sensation, stiffness, throbbing, tingling, pain,
clumsiness, weakened grip, whitening of the skin, or
other symptoms occur at any time, when operating
the machine or when not operating the machine, stop
operating the machine, tell your employer and seek
medical attention. Continued use of the machine after
the occurrence of any such symptom may increase
the risk of symptoms becoming more severe and/or
permanent.
Operate and maintain the machine as recommended
in these instructions, to prevent an unnecessary
increase in vibration.
The following may help to reduce exposure to
vibration for the operator:
►If the machine has vibration absorbing handles,
keep them in a central position, avoid pressing the
handles into the end stops.
►When the percussion mechanism is activated, the
only body contact with the machine you must have
are your hands on the handle or handles. Avoid
any other contact, for example supporting any part
of the body against the machine or leaning onto
the machine trying to increase the feed force.
►Make sure that the machine is well-maintained
and not worn out.
►Immediately stop working if the machine suddenly
starts to vibrate strongly. Before resuming the
work, find and remove the cause of the increased
vibrations.
►Participate in health surveillance or monitoring,
medical exams and training programs offered by
your employer and when required by law.
►When working in cold conditions wear warm
clothing and keep hands warm and dry.
See the ”Noise and vibration declaration statement”
for the machine, including the declared vibration
values. This information can be found at the end of
these Safety and operating instructions.
WARNING Trapping hazard
There is a risk of neck ware, hair, gloves, and clothes
getting dragged into or caught by rotating machine
parts. This may cause choking, scalping, lacerations,
or death. To reduce the risk:
►Never grab or touch a rotating machine part.
►Avoid wearing clothing, neck ware or gloves that
may get caught.
►Cover long hair with a hair net.
DANGER Electrical hazard
The machine is not electrically insulated. If the
machine comes into contact with electricity, serious
injuries or death may result.
►Never operate the machine near any electric wire
or other source of electricity.
►Make sure that there are no concealed wires or
other sources of electricity in the working area.
WARNING Slipping, tripping and falling
hazards
There is a risk of slipping or tripping or falling, for
example tripping on the hoses or on other objects.
Slipping or tripping or falling can cause injury. To
reduce this risk:
►Always make sure that no hose or other object is
in your way or in any other person's way.
►Always make sure you are in a stable position with
your feet as far apart as your shoulders width and
keeping a balanced body weight.
WARNING Concealed object hazard
During operating, concealed wires and pipes
constitute a danger that can result in serious injury.
►Check the composition of the material before
operating.
►Watch out for concealed cables and pipes for
example electricity, telephone, water, gas, and
sewage lines.
►If the machine seems to have hit a concealed
object, switch off the machine immediately.
►Make sure that there is no danger before
continuing.
WARNING Involuntary start
Involuntary start of the machine may cause injury.
►Keep your hands away from the start and stop
device until you are ready to start the machine.
►Learn how the machine is switched off in the event
of an emergency.
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Safety and operating instructionsORKA

WARNING Noise hazard
High noise levels can cause permanent and disabling
hearing loss and other problems such as tinnitus
(ringing, buzzing, whistling, or humming in the ears).
To reduce risks and prevent an unnecessary increase
in noise levels:
►Risk assessment of these hazards and
implementation of appropriate controls is essential.
►Operate and maintain the machine as
recommended in these instructions.
►If the machine has a silencer, check that it is in
place and in good working condition.
►Always use hearing protection.
Transport, precautions
WARNING Loading and unloading hazard
When the machine is lifted by a crane and similar
appliance, this can lead to injury.
►Use marked lifting points.
►Make sure that all lifting devices are dimensioned
for the weight of the machine.
►Never remain under or in the immediate vicinity
of the machine.
Maintenance, precautions
WARNING Machine modification
Any machine modification may result in bodily injuries
to yourself or others.
►Never modify the machine. Modified machines are
not covered by warranty or product liability.
►Always use original parts and accessories
approved by Atlas Copco.
►Change damaged parts immediately.
►Replace worn components in good time.
WARNING Accessory hazards
Accidental engagement of accessories during
maintenance or installation can cause serious
injuries, when the power source is connected.
►Never inspect, clean, install, or remove
accessories while the power source is connected.
WARNING Secure the working area
Cluttered benches and insufficient lighting can cause
personal accidents and result in serious injuries.
►Keep the working area clean.
►Maintain adequate lighting in the working area.
WARNING Broken power switch
The power switch does not control the machine. A
broken power switch is dangerous and must be
repaired.
►Do not use the machine if the power switch is
broken and cannot be controlled.
►Maintain the power switch.
Storage, precautions
♦Keep the machine in a safe place, out of the reach
of children and locked up.
WARNING Damaged machine parts
Lack of maintenance will result in damaged or worn
parts that can cause accidents.
►Check the moving parts for misalignment or
binding.
►Check the machine for broken or, in other ways,
damaged parts.
Damaged or worn parts can effect the operation
of the machine.
WARNING Incorrect usage
An incorrect use of the machine, accessories, and
insertion tools/ cutting blades can result in serious
injuries or a hazardous situation.
►Use the machine, accessories and tools in
accordance with the safety instructions.
►Use the machine for what it is designed for, and
in the way it is intended.
►Use the correct machine for the work that is going
to be performed.
►Do not force the machine while operating.
►Take the working conditions into account.
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Original instructions
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ORKASafety and operating instructions

Overview
To reduce the risk of serious injury or death to
yourself or others, read the Safety instructions
section found on the previous pages of this
manual before operating the machine.
Design and function
ORKA350/450 floor saw is designed for wet sawing
of new and old concrete and asphalt with a diamond
cutting disk. Cutting depth is up to 175 mm with a
450 mm cutting disk. The floor saw is designed to
provide safe and reliable working conditions.
Main parts
C
D
E
M
J
B
A
G
F
H
O
P
N
Q
K
L
I
A. Height adjustable operating handle
B. Depth handle stop lever
C. Lowering handle
D. Protecting frame including lifting eye
E. Engine
F. Belt cover
G. Belt tensioning screw
H. Guide
I. Blade cover
J. Water tap, water coupling
K. Heavy duty wheels mounted on bearings
L. Cyclonic filter
M. 30 litres tank
N. ON/OFF switch
O. Throttle lever
P. Water tank lid
Q. ON/OFF switch (Diesel version)
Labels
The machine is fitted with labels containing important
information about personal safety and machine
maintenance. The labels must be in such condition
that they are easy to read. New labels can be ordered
from the spare parts list.
Data plate
TypeXXXXX
Serial No.XXXXXX
XX kg
XXXX kW
Made in XXXXXX
XXXXMin
-1
A
B
E
D
C
EOOD
A. Machine type
B. Product identification number
C. Technical characteristics of the machine
D. The warning symbol associated with the
symbol of a book means that the user must
read the Safety instruction part before using
the machine for the first time.
E. The CE symbol means that the machine is
EC-approved. See the EC Declaration of
Conformity which is delivered with the machine
for more information.
Noise level label
WA
xxx
dB
The label indicates the guaranteed noise level
corresponding to EC-directive 2000/14/EC. See
"Technical data" for accurate noise level.
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Safety and operating instructionsORKA

Lifting point label
Safety label
♦Instruction manual. The operator must read the
Safety and operating instructions before operating
the machine.
♦Use protective gloves.
♦Use ear protectors.
Operation
WARNING Engine running hazard
Vibrations from the engine can cause material
changes, this can cause the machine to move and
cause injuries.
►Never leave the machine with the engine running.
►Ensure that only authorized personnel operate the
machine.
NOTICE When operating the machine, follow the
instructions in the manual; never sit or stand on the
machine when it is working.
Fitting the blade
1. Turn off the engine.
2. Set the machine to the lifted position.
3. Disconnect the water pipe (A) from the blade
cover (B).
A
B
C
4. Remove the screw for the blade cover (C).
5. Lift the blade cover. Take notice of the direction
of rotation. The machine shaft turns clockwise.
The direction of rotation is shown by an arrow.
Make sure that the contact surface between the
flanges (D) and (E) of the blade and shaft is
clean.
D
E
F
6. Fit the blade.
7. Firmly lock the screw (F) (left hand thread).
8. Fit the blade cover. (B)
9. Reconnect the water pipe. (A)
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ORKASafety and operating instructions

Operation
Preparations
NOTICE Make sure that the water supply is
abundant during wet cutting.
1. Check the fuel level.
2. Check that the engine oil level is correct. The
engine often operates in an angle; make sure
that the oil never falls bellows the second mark
on the oil dip stick.
3. Fill the water tank.
4. Mark the floor by drawing a line where the cut
should be made.
5. Fold down the front guide and position the
machine to line up with the mark on the floor.
6. Start the engine. See section Starting the engine.
7. Allow the engine to warm up.
8. Open the water inlet tap.
9. Increase the engine speed to maximum.
10. Hold the machine in position; turn the lowering
handle anticlockwise to the desired depth. 1
revolution of the handle equals 1 cm in depth.
11. Lower the blade slowly to prevent the engine
from stalling.
12. Once the desired depth is reached, lock the stop
lever.
Cutting depth
A
The cutting depth (A) can be adjusted. The maximum
cutting depth is dependent on the blade that is
mounted on the machine.
Maximum cutting depthDiameter of the cutting blade
150 mm (5.9 in.)450 mm (18 in.)
100 mm (3.9 in.)350 mm (14 in.)
Stops during operating
Several things could cause the blade or the machine
to stop.
1. The tension of the belt becomes too loose.
2. No fuel left in the tank.
3. Too fast feed or too fast decent of the blade.
Starting the engine, Honda
1. Set the main switch to position ON (A).
A
2. Open the fuel cock (B).
3. Close the choke valve (D) if the engine is cold.
If the engine is warm or the ambient temperature
is high, close the choke valve halfway or leave
it open.
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Safety and operating instructionsORKA

4. Turn the engine start switch (E) to ON.
5. Grip the handle of the recoil starter (F) and pull
until resistance is felt. Release the handle to the
initial position, then pull until the engine starts.
6. Move the choke valve (G) gradually to the fully
open position.
NOTICE When you have started the engine, leave
it for a few minutes to warm up before loading the
generator.
Starting the engine, Lombardini
1. Set the engine ON/OFF control (A) to position
ON.
2. Set the throttle control (B) to half throttle.
A
B
3. Grip the recoil starter handle (C) with both hands
and pull until it resists. Return the handle to the
initial position, then pull sharply and at an
increasing speed (but do not jerk) until the engine
starts.
C
4. As the engine warms up, gradually move the
throttle control (D) to position MAX.
D
NOTICE Before use, the engine throttle control (D)
must be in MAX position.
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ORKASafety and operating instructions

If the exhaust begins to emit white smoke, after
several attempts of starting, do the following:
1. Move the throttle control to the stop position.
2. Slowly pull the starting cable out 5 times.
3. Repeat the starting procedure.
Stopping the machine
NOTICE Emergency stop: Operate the switch
located on the control panel of the machine.
C
A
B
A
1) Release the stop lever and retract the blade
from the groove by turning the lowering handle
counter clockwise.
2) Turn off the water supply.
3) Set the engine to idle speed using throttle lever
(A).
4) Petrol version: stop the engine with the
ON/OFF switch (B).
Diesel version: stop the engine by moving the
the ON/OFF leaver (C) to OFF position.
Maintenance
Regular maintenance is a basic requirement for the
continued safe and efficient use of the machine.
Follow the maintenance instructions carefully.
♦Before starting maintenance on the machine, clean
it in order to avoid exposure to hazardous
substances. See “Dust and fume hazard”.
♦Use only authorised parts. Any damage or
malfunction caused by the use of unauthorised
parts is not covered by warranty or product liability.
♦When cleaning mechanical parts with solvent,
comply with appropriate health and safety
regulations and ensure there is satisfactory
ventilation.
♦For major service of the machine, contact the
nearest authorised workshop.
♦After each service, check that the machine's
vibration level is normal. If not, contact the nearest
authorised workshop.
Every 8 hours of operation
(daily)
NOTICE For maintenance of the engine see the
maintenance manual for the engine.
Maintenance routines:
●Apply bearing lubricant on the bearings.
●Check the oil level for the engine. For the petrol
engines, use motor oil SAE 10W30 with API class
MS, DS, SE or better.
●Check the air filter according to the maintenance
manual for the engine. In extremely dusty
conditions check and clean the air filter two to
three times a day.
●Replace damaged filters and gaskets.
Adjusting the belt.
Tensioning and control of the belt:
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Safety and operating instructionsORKA

1. Unscrew the nut (B) and the screw (A).
A B C D E
2. Unscrew the four nuts that hold the engine (the
nuts are located in each corner of the engine)
(C).
3. Adjust the tension of the belt (E) with the screw
(A). Then tighten the four nuts (C) that hold the
engine. Then tighten the nut (B).
Replacing the belt:
1. Unscrew the four nuts that hold the engine (the
nuts are located in each corner of the engine)
(C).
2. Slide the engine to the front of the machine.
3. Unscrew and take off the two pulleys (D).
4. Remove the used belt (E).
5. Place the new belt on the pulleys and slide it
simultaneously on the two pulleys. The pulleys
are connected to the engine and blade shaft.
6. Tighten the pulleys.
7. Adjust the tension of the belt as described.
Every 20 hours of operation
(weekly)
Maintenance routines
Applies to all:
♦Change engine oil.
♦Clean and refit air filter.
♦Check the engine speed.
Applies to Lombardini engine:
♦Check and adjust valve clearance. See engine
manual for more information.
Changing the engine oil and air filter, Honda
Only drain engine oil when engine is warm.
1. Unscrew the drain plug (A) for the oil and drain
off all the oil. Use a draining hose (B).
2. Refit the drain plug (A) and tighten.
D
C
A
B
3. Fill engine oil to the maximum mark on the
dipstick (C).
4. Loosen and replace the air filter (D).
See the engine manual for more information.
Changing the engine oil and air filter,
Lombardini
Only drain engine oil when engine is warm.
© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
16
ORKASafety and operating instructions

1. Unscrew the drain plug (A) for the oil and drain
off all the oil. Use a draining hose (B).
2. Refit the drain plug (A) and tighten.
A
B
3. Fill engine oil to the maximum mark on the
dipstick (C).
C
D
4. Loosen and replace the air filter (D).
See the engine manual for more information.
Every 100 hours of operation
(monthly)
Maintenance routines:
♦Change the engine oil. See the engine manual for
more information.
♦Check and clean the spark plug. See the engine
manual for more information.
♦Check the shock absorbers.
♦Check the air filter.
♦Check the engine speed. See the engine manual
for more information.
♦Clean the carburettor's fuel cock. See the engine
manual for more information.
♦Clean the silencer spark catcher. See the engine
manual for more information.
Checking spark plug, Honda
♦Check, clean and replace the spark plug.
Every 250 hours of operation
(every third month)
Maintenance routines:
♦Clean and refit the air filter. See the engine manual
for more information.
♦Check the injection pump. See the engine manual
for more information.
♦Check the fuel injector. See the engine manual
for more information.
♦Check and adjust engine valve clearances. See
the engine manual for more information.
♦Clean the fuel tank and fuel filter. See the engine
manual for more information.
♦Change the engine oil. See the engine manual for
more information.
♦Clean the engine's cooling flanges.
♦Clean the engine's exhaust pipe. See the engine
manual for more information.
17© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
Safety and operating instructionsORKA

♦Check and tighten screws and nuts.
♦Lubricate controls and links.
♦Check all rubber elements.
Every 500 hours of operation
(yearly)
Maintenance routines:
♦Adjust valve clearances for intake and exhaust
valves. See the engine manual for more
information.
♦Clean and check the fuel filter and fuel tank. See
the engine manual for more information.
♦Replace the air filter.
♦Clean the engine's cooling flanges. See the engine
manual for more information.
♦Change the oil in the engine. See the engine
manual for more information.
Applies to petrol engines.
♦Clean and adjust the carburettor. See the engine
manual for more information.
Applies to diesel engines:
♦Check the fuel injection pump. See the engine
manual for more information.
♦Check the fuel injection nozzle. See the engine
manual for more information.
♦Drain the fuel system of water. See the engine
manual for more information.
♦Replace the fuel filter. See the engine manual for
more information.
♦Change the oil filter. See the engine manual for
more information.
Disposal
A used machine must be treated and disposed of in
such a way that the greatest possible portion of the
material can be recycled and any negative influence
on the environment is kept as low as possible, and
in accordance with local restrictions.
Before a fuel driven machine is deposited it must be
emptied and cleaned of all oil and fuel. Remaining
oil and fuel must be dealt with in a way that does not
adversely affect the environment.
Always send used filters, drained oil and fuel
remnants to environmentally correct disposal.
Storage
♦Empty the tank before storing the machine.
♦Clean the machine.
♦Clean the air filter.
♦Carefully pull the start handle until a slight
resistance appears.
♦Wipe off any oil and dust that has accumulated
on the rubber parts.
♦Cover the machine and store it in a dry, dust-free
area.
© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
18
ORKASafety and operating instructions

Troubleshooting
SolutionCauseProblem
Check the oil and petrol levels.Not enough petrol or oil.The engine will not start.
Open the petrol valve.The petrol valve is closed.
Set the switch to the "ON" position.The engine switch is not in the "ON" position.
Check the condition of the spark plug.
Replace if necessary.
The spark plug is disconnected or worn.
Use a blade for the type of material that you
are going to cut. Asphalt, dry concrete or wet
concrete.
Wrong type of cutting blade.The cutting is not correct
Use the handle to adjust the depth. (10 mm
per turn of the handle.)
Problem with the height adjustment.Too shallow cutting deep.
Use a 450 mm blade instead of a 350 mm
blade.
Change the dimension of the blade.
Adjust your walking pace to the depth that
you are cutting. (The deeper the cutting
depth, the slower the walking speed.)
To high torque on the engine shaft.The engine stops or vibrates too much during
operation.
Choose blade according to the work to be
performed.
The blade does not fit the operation.
Add water in the tank and/or check the flow
in the hose.
No cooling and lubricating water on the
blade.
19© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
Safety and operating instructionsORKA

Technical data
Machine data
ORKA350/450 DieselORKA350/450 Honda
480 (18.9)480 (18.9)Maximum disk size mm (in.)
150 (5.9)150 (5.9)Maximum cutting depth mm (in.)
LombardiniHondaEngine brand
15LD350GX390 QX S4Model
Diesel oilPetrolFuel
5.5 (7.5)8.2 (11)Power, kW (hp)
30 (7.92)30 (7.92)Water tank capacity litres (gallons)
Recoil startRecoil startIgnition
DieselPetrolFuel
Weights and dimensions
Weight,
kg (lb)
Total length,
mm (in.)
Total width,
mm (in.)
Height,
mm (in.)
98
(217)
1370
(54)
510
(20)
1015
(40)
ORKA350/450 Honda
100
(221)
1370
(54)
510
(20)
1015
(40)
ORKA350/450 Diesel
Noise data
VibrationNoise
Declared valuesDeclared values
Three axes valuesSound powerSound pressure
ISO 138622000/14/ECEN ISO 11203
B m/s2spreadsA m/s2value
Lw db (A)
Lpa
Type
0.724.1511589ORKA350/450
Honda
1.7612.3712096ORKA350/450
Diesel
Noise and vibration declaration statement
Guaranteed sound power level Lw according to EN ISO 3744 in accordance with directive 2000/14/EC.
Sound pressure level Lp according to EN ISO 11201, EN 500-4:2011.
Vibration value determined according to EN 500-4:2011. See table ”Noise and vibration data” for the values
etc.
These declared values were obtained by laboratory type testing in accordance with the stated directive or
standards and are suitable for comparison with the declared values of other machines tested in accordance
with the same directive or standards. These declared values are not suitable for use in risk assessments and
values measured in individual work places may be higher. The actual exposure values and risk of harm
experienced by an individual user are unique and depend upon the way the user works, in what material the
machine is used, as well as upon the exposure time and the physical condition of the user, and the condition
of the machine.
© 2015 Construction Tools EOOD | No. 9800 1203 01b | 2015-02-05
Original instructions
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ORKASafety and operating instructions