Berlan BMS520A User manual

User Manual
Art.-No.: 27249
Art.-Name.: BMS520A
Version 1.1 english
Petrol-brush cutter
BMS520A

Page 2
INDEX
BEFORE GETTING STARTEDIMPORTANT INFORMATION
Important information 2
Before getting started 2
Intended use 3
General safety regulations 3
Device description 6
Getting started 7
Maintenance 8
Trouble shooting 10
Technical specifications 10
EU Declaration of Conformity 11
• Please read this user manual carefully
and pay attention to all given instruc-
tions.
• Use this user manual to get familiar with
your device and its operation.
• For your own safety always pay atten-
tion to the general safety regulations.
• In case you hand out machine to an-
other person always hand over user
manual as well.
• Children and youngsters aged under 16
years as well as people not being famil-
iar with user manual are not allowed to
operate this machine.
• Before every operation it is absolutely
necessary to check all parts for dam-
ages.
Mixture of fuel:
• Only use normal unleaded petrol with
octane rating of 87 or above.
• Mix petrol with 2-stroke engine oil in ratio
25:1
Filling petrol tank:
• Place brush cutter on flat and stable
ground.
• Remove all debris from fuel filling neck.
• Remove tank cap and fill tank.
• Afterwards close tank again.
EU DECLARATION OF CONFORMITY
Page 11

TECHNICAL SPECIFICATIONS
Page 10
TROUBLE SHOOTING
Problem Cause Remedy
Engine does not
start or cuts off
again immedi-
ately
Polluted or defective spark
plug
Clogged petrol filter
Wrongly adjusted carburettor
Misaligned spark plug clear-
ance
Clean or replace spark plug
Clean or replace petrol filter
Adjust carburettor correctly
Engine is run-
ning but does
not have any
power
Clogged air filter
Incorrect position of choke
lever
Polluted silencer
Wrongly adjusted carburettor
Clean or replace air filter
Change lever position
Replace or clean silencer
Spluttering or
erratic
running engine Wrongly adjusted carburettor Adjust carburettor
No power under
load
Spark plug defective, polluted
or incorrectly adjusted
Incorrect petrol mix
Clean, adjust or replace spark
plug
Strongly smok-
ing exhaust pipe Incorrect petrol mix Discharge tank and use petrol mixture 25:1
Cutting tools
turning at idle
running
Idle running speed too high
Defective clutch
Defective main shaft
Adjust idle running speed
replace clutch
Replace main shaft
Model BMS520A
Engine 2-stroke petrol engine, 1 cylinder, air-cooled
Displacement 51.7 cm³
Maximum power 2.2 KW / 3,0 HP at 7500 turns/min
Petrol Unleaded fuel mixed 1:25
Maximum idle running speed 3000 turns/min
Tank capacity 1200 ml
Maximum cutting circle 430 mm
Sound pressure level (Lpa) 108 dB (A)
Sound power level( Lwa) 110 dB (A)
Dimensions 1830 mm x 610 mm x 420 mm
Weight 7.5 kg
Page 3
• Wipe away all spilled petrol away from
tank before starting brush cutter.
Before getting started always check:
• Tightness of fuel system, proper condition
of all safety devices and cutting devices,
fast seating of all screws.
• Make sure that all bolts and other fasten-
ing elements are correctly tightened and
none is missing.
Cutter:
• Cutter is very sharp. Please be carefully
with it.
• To mount cutter correctly please read
instructions given on it in this user manual.
• Observe! Fastening of cutting blade is a
left turning thread!
Adjusting cutting height:
• Put on carrying strap.
• Hook your device.
• Adjust cutting and working position on
carrying strap by using strap adjuster.
• To find the perfect position for yourself do
a few swings with device without engine
running.
• Never carry out following operations us-
ing brush cutter, As those can cause bad
injuries or damage machine:
-chaffing of hedges and branches
-Cleaning pavements
-evening unevenness of ground
- removing molehills
- for operating other gardening devices
• This device is especially designed for
private usage and is not suitable for
application in hand craft or commercial
companies.
INTENDED USE
• Using this brush cutter only cut lawn and
grass land. For cutting bushes and
branches only use saw tooth blade.
• All other applications can result in bad
injuries of operator or damage brush cut-
ter.
GENERAL SAFETY REGULATIONS
• Exhaust fumes are toxic. Never operate
this device indoors.
• Petrol is easily inflammable. Stop engine
before refuelling petrol.
• Never smoke while refuelling or carrying
out maintenance operations. Pay atten-
tion to nit spilling fuel.
• Device may not be exposed to perma-
nent dampness and dust.
• Do not remove any of the protective cov-
ers and do never touch moving or hot
parts.
• Repair and adjusting operations may only
be carried out according to the given
instructions in maintenance chart.
• Basic settings on engine as well as rotary
speed may not be modified unauthorised.
• Start machine on an even, secure place.

Page 4
• Used packing material ought to be recy-
cled. Used lubricates must be dispensed
to provided gathering places.
• Never operate machine near flammable
substances. Explosion hazard!
• Keep children, animals and other people
at distance when starting and during
operation away from cutting area.
• Never operate device near glass panels,
windows, parked cars or similar objects
as these could be damaged by flying
parts.
• Never operate machine near people or
group of people as those could be badly
hurt by flying parts.
• To avoid kickback of cutting blade while
cutting be very careful while operating
machine near foundations, fences, land-
marks, metal stakes, boles, branches,
stones, stumps or other fixed objects.
• On cutting shrubbery please be very
careful as it could be caught in brush
cutter. Increased risk of injury!
• Never use wire inside fibre head as this
could cause bad injuries.
• Never inhale exhaust fumes. Risk of
intoxication!
• Never carry out any technical modifica-
tions on device.
• Attention! Device is developing heat in
exhaust pipe area. Avoid this area to pre-
vent from burnings.
• For filling petrol tank only use unleaded
normal fuel and 2 stroke engine oil in
mixture ration of 25:1.
• Never use petrol mixtures older than 90
days or having an other mixture ration
than 25:1.
• Never store brush cutter indoors with filled
petrol tank. Before storing you should
make sure that brush cutter has cooled
down completely.
• Make sure that brush cutter is ventilated
well and regularly remove leaves, grass
and other impurity from ventilation slot and
metal/ plastic shield.
• To avoid electric shock do never touch
spark plug socket during operation of
machine.
• Never carry out maintenance operations
while machine is on work and do only use
appropriate tools.
• Only operate brush cutter with both hands
as otherwise you or your assistant could
be injured.
Page 9
Cutting knife and protection cover:
• If cutter is getting blunt on fibre cover,
replace it immediately.
• You can put knife into a bench vice and
sharpen it by using a flat file. Make sure
you are filling only in one direction.
Adjusting carburettor:
• As soon as you release throttle control
engine ought to go back to idle running
speed.
• Cutting tool may not move in idle running
speed!
• Start the engine and allow it to war up for
two to three minutes.
• In case cutting tool should turn in idle
speed it might be necessary to reduce
idle running speed by turning adjusting
screw counter clockwise.
• In case engine should break down often
in idle running speed increase it by turn-
ing adjusting screw clockwise.
Silencer:
• Never operate engine with defective or
missing silencer. Make sure silencer is
mounted correctly and in good condition.
Damaged or worn silencer increases fire
hazard and can cause hearing disorder.
Spark plug:
• Keep spark plug and cable connections
clean.
• Remove spark plug by using spark plug
wrench.
• Clean spark plug using a wire brush.
• Electrode clearance can be adjusted by
using a feeler gauge. Clearance should
be 0.6-0.7mm.
Cleaning air filter:
• Remove air filter cover and carefully take
out air filter. Clean it with soap water.
Allow it to dry completely.
• Mount air filter again and close air filter
cover again. Fasten screws again.
• Important: Never operate brush cutter
without air filter as dust and dirt damage
engine.
Cleaning petrol filter:
• Open fuel filler cap, drain off petrol from
tank completely and bend a wire.
• Carefully pull out fuel hose using the wire
so you can reach it with your fingers.
• Now carefully take out filter. Please make
sure that you do not pull out fuel hose
completely as it ought to stay inside tank.
• Carefully remove filter from fuel hose by
turning it and clean it.
• Defective filter ought to be replaced im-
mediately.
• After cleaning filter mount it back on fuel
hose again and Place it inside lower part
of tank again (if necessary use wire to
push it down to tank bottom). Close fuel
filler cap again.
• Important: Never operate brush cutter
without fuel filter!
• For all further maintenance and repair
operations please do not hesitate to con-
tact your customer service.

MAINTENANCE
• Before carrying out maintenance opera-
tion please always switch off device and
unplug it.
• Good, regular maintenance will extend
durability and improve cutting perform-
ance of your brush cutter.
• Regularly check fast and correct seat of
cutting tools and if necessary adjust them
again.
• Check correct seating off all screws every
10 operating hours. Loose screws ought
to be fastened again.
• Remove dirt and debris from engine.
• Check cylinder plate and air filter for
blockage and if necessary remove stick-
ing dirt, debris and so on.
• Carefully remove dirt and debris from
muffler and petrol tank.
• Check for loose or missing screws or
parts. Make sure that cutting tool is free
from debris and correctly mounted.
Page 8
Handhold:
• Loosen 4 screws of handle bracket.
• Insert right and left handle unit into
bracket and fasten screws again.
Fibre -/ blade protection:
• Mount protective cover to the gear head
and fasten it with help of the screws in-
cluded in delivery.
Speed Bowden cable:
• Remove air filter cover.
• Insert Bowden cable through adjusting
screw and fit end of Bowden control into
opening of throttle of carburettor.
• Adjust Bowden cable with help of adjust-
ing screw with 1-2mm clearance.
Assembling cutting knifes
• Loosen mounting nut on arbour of gear
head. Attention, Pay attention to left-hand
thread!
• Remove pressure plate cover and lower
pressure plate.
• Install cutting knife now and mount pres-
sure plate again.
• Tighten fastening screw again.
• Attached to upper pressure plate you will
find arrester bore. Insert e.g. hex wrench
to hold up screw and tighten fastening
screw by using a fitting wrench.
Assembling nylon cutter:
• Loosen fastening nut on arbour of gear
head, pay attention to left-hand thread!
• Only remove pressure plate cover.
• Screw nylon cutter on top of thread.
• Attached to upper pressure plate you will
find arrester bore. Insert e.g. hex wrench
to hold up screw and fasten nylon cutter
by hand.
Page 5
• On mowing please protect yourself suffi-
ciently with protective cloth such as ear
protection, safety boots, tight-fitting cloth,
Helmet, safety gloves and protective gog-
gles.
• While working with this machine please do
never wear any jewels as these could be
caught in moving parts and cause bad
injuries.
• On starting brush cutter it may not touch
any objects.
• Make sure that device is not defective or
incompletely or incorrectly mounted. In
that case please do not operate brush
cutter.
• Before putting brush cutter down please
switch it off.
• Handles of brush cutter should always be
dry, clean and not contain any remains of
petrol or oil.
• Never operate brush cutter when you are
tired, have drunk alcohol or taken any
other drugs.
• On cutting you should always work with a
high engine speed.
• Also pay attention to the maintenance
information given by manufacturer and do
only use approved original spare parts.
• Important: When working with cutting
blade always remove fibre head from
protective cover. But anyway never oper-
ate device without protective cover.
• Attention! Sound pressure level given on
this item is only a measured reference
value. As it is very much depending on
operating environment it can vary in
every days use. Protect yourself and
other people according to the given val-
ues adequate from developing noise
exposure.

Page 6
pict 1
pict 2
DEVICE DESCRIPTION
Picture 1:
1- air filter
2- choke lever
3- recoil starter
4- Spark plug socket
5- petrol tank
6- exhaust pipe
Picture 2:
7- Gear head
8- knife protection cover
Picture 3:
9- Bracket handhold
10 - Bracket shoulder strap
11 - Connector engine
Picture 4:
12 - Speed lever
13 - Speed Bowden control
14 - wire plug of
On -/ Off switch
15 - arresting screw
16 - On -/ Off switch
17 - Speed lever interlock
18 - Speed lever
Picture 5:
19 -Screw driver
20 - spark plug wrench
21 - hex-wrench
22 - screw wrench
23 - cable retainer
24 - 3 tooth blade
25 - Shoulder strap
26 - petrol tank
27 - Retaining screw for
Blade cover
28 - Cutter for blade cover
29 - Knife protection cover
30 - double-fibre head
pict 3
pict 4
Pict 5
Page 7
GETTING STARTED
• When starting engine it is possible that
blade is turning. Make sure that when
starting engine blade is not touching any
objects.
• Before getting started always check fol-
lowing:
• Tightness of petrol system, proper condi-
tion of safety devices and cutter, Fast
seating of all screws.
• Always observe local regulations on
noise protection.
Filling in petrol:
• Engine needs a petrol-oil mixture in mix-
ture ratio of 25:1.
• Petrol has to be mixed before filling in
tank. For petrol-oil mixture a quality 2
stroke engine oil is needed.
Starting cold engine:
• Place device on an even, solid ground.
• Open choke lever
• Press petrol pump at carburettor about 5
times so petrol is being sucked in.
• Set On -/ Off switch to on „I“ position
• Fix speed lever. For this you just press
speed lever arrestor first and afterwards
speed lever. By pressing arrestor at the
same time you can arrest speed lever.
• Now hold device tight and pull recoil
starter out until you can feel first resis-
tance. Now pull recoil starter briskly
through. Do not allow recoil starter to kick
back as this could cause damage to de-
vice.
• Engine has now started. Close choke
lever after about 10 seconds and allow
engine to warm up a bit.
• Important! Due to fixed speed lever cut-
ting blade will start turning as soon as
engine has been started. When pressing
speed lever engine will be set back to idle
running speed.
• In case engine does not start, please
repeat steps mentioned above.
• In case engine does not start even after
several tries please read chapter
„Trouble shooting“.
Starting warm engine:
• Place device on an even, solid ground.
• Set On -/ Off switch to On „I“ position
• Fix speed control lever. For this you just
press speed lever arrestor first and after-
wards speed lever. By pressing arrestor
at the same time you can arrest speed
lever.
• Now hold device tight and pull recoil
starter out until you can feel first resis-
tance. Now pull recoil starter briskly
through. Do not allow recoil starter to kick
back as this could cause damage to de-
vice.
• Device should start now. In case brush
cutter is not starting within 6 drags repeat
steps on chapter starting cold engine.
Switch off engine:
• Put speed control lever back to basic
position so engine is running in idle
speed. Allow engine to cool down for
about 2 minutes.
• Set On -/ off switch to „0“ position.
Engine and main tube:
• Direct base frame to engine unit and fix
both with help of the 4 screws included in
delivery . Fasten screws with equal force.