Bosch GKE 40 BCE Professional manual

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  • Brand: Bosch
  • Product: Saw
  • Model/name: GKE 40 BCE Professional
  • Filetype: PDF
  • Available languages: Dutch, English, German, French, Spanish, Italian, Swedish, Portuguese, Danish, Polish, Norwegian, Finnish, Czech, Romanian, Turkish, Slovak, Greek, Hungarian, Slovene, Croatian

Table of Contents

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1 609 929 V11 | (23.8.11) Bosch Power Tools
Made in Hungary
0 600 xxx xxx
xxx V ~ xx Hz
x A xxxx W
xxx mm
Robert Bosch GmbH
D-70745 Leinfelden Echterdingen
1 6
1 5 6 7
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22 11
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1 609 929 V11 | (23.8.11) Bosch Power Tools
3-4 mm
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50 mm
50 mm
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Bosch Power Tools 1 609 929 V11 | (23.8.11)
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1 609 929 V11 | (23.8.11) Bosch Power Tools
Tel.: +32 2 588 0589
Fax: +32 2 588 0595
Elektrowerkzeuge, Zubehör und Verpackungen sollen einer
umweltgerechten Wiederverwertung zugeführt werden.
Werfen Sie Elektrowerkzeuge nicht in den Hausmüll!
Nur für EU-Länder:
Gemäß der Europäischen Richtlinie
2002/96/EG über Elektro- und Elektronik-
Recht müssen nicht mehr gebrauchsfähige
Elektrowerkzeuge getrennt gesammelt und
einer umweltgerechten Wiederverwertung
zugeführt werden.
Änderungen vorbehalten.
Safety Notes
General Power Tool Safety Warnings
Read all safety warnings and all in-
and instructions may result in electric shock, fire and/or seri-
ous injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-
operated(corded) power tool orbattery-operated(cordless)
power tool.
Work area safety
f Keepworkareacleanandwelllit.Clutteredordarkareas
invite accidents.
f Do not operate power tools in explosive atmospheres,
such as in the presence of flammable liquids, gases or
dust. Power tools create sparks which may ignite the dust
or fumes.
f Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
Electrical safety
f Power tool plugs must match the outlet. Never modify
the plug in any way. Do not use any adapter plugs with
earthed (grounded) power tools. Unmodified plugs and
matching outlets will reduce risk of electric shock.
f Avoidbodycontactwithearthedorgroundedsurfaces,
such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body is
earthed or grounded.
f Do not expose power tools to rain or wet conditions.
f Do not abuse the cord. Never use the cord for carrying,
pulling or unplugging the power tool. Keep cord away
from heat, oil, sharp edges and moving parts. Damaged
or entangled cords increase the risk of electric shock.
f When operating a power tool outdoors, use an exten-
sioncord suitablefor outdoor use. Useofa cord suitable
for outdoor use reduces the risk of electric shock.
f If operating a power tool in a damp location is unavoid-
able, use a residual current device (RCD) protected
supply. Use of an RCD reduces the risk of electric shock.
Personal safety
f Stay alert, watch what you are doing and use common
sensewhen operating apower tool.Do notuse apower
toolwhileyouaretiredor undertheinfluenceofdrugs,
alcohol or medication. A moment of inattention while op-
erating power tools may result in serious personal injury.
f Use personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce personal inju-
f Prevent unintentional starting. Ensure the switch is in
the off-position before connecting to power source
and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or en-
ergising power tools that have the switch on invites acci-
f Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a ro-
tating part of the power tool may result in personal injury.
f Do not overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
unexpected situations.
f Dress properly. Do not wear loose clothing or jewel-
lery. Keep your hair, clothing and gloves away from
movingparts. Loose clothes, jewellery or long hair can be
caught in moving parts.
f If devices are provided for the connection of dust ex-
traction and collection facilities, ensure these are con-
nected and properly used. Use of dust collection can re-
duce dust-related hazards.
Power tool use and care
f Donotforcethe powertool.Use thecorrectpower tool
for your application. The correct power tool will do the
job better and safer at the rate for which it was designed.
f Do not use the power tool if the switch does not turn it
on and off. Any power tool that cannot be controlled with
the switch is dangerous and must be repaired.
f Disconnect the plug from the power source and/or the
battery pack from the power tool before making any
adjustments, changing accessories, or storing power
tools. Such preventive safety measures reduce the risk of
starting the power tool accidentally.
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Bosch Power Tools 1 609 929 V11 | (23.8.11)
f Store idle power tools out of the reach of children and
do not allow persons unfamiliar with the power tool or
these instructions to operate the power tool. Power
tools are dangerous in the hands of untrained users.
f Maintain power tools. Check for misalignment or bind-
ing of moving parts, breakage of parts and any other
condition thatmay affectthe powertool’s operation.If
damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained power
f Keepcuttingtoolssharpandclean. Properlymaintained
and are easier to control.
f Use the power tool, accessories and tool bits etc. in ac-
cordance with these instructions, taking into account
the working conditions and the work to be performed.
Use of the power tool for operations different from those
intended could result in a hazardous situation.
f Haveyourpowertoolservicedbyaqualifiedrepairper-
son using only identical replacement parts. This will en-
sure that the safety of the power tool is maintained.
Chain Saw Safety Warnings
f Keep all parts of the body away from the saw chain
saw, make sure the saw chain is not contacting any-
may cause entanglement of your clothing or body with the
saw chain.
f Always hold the chain saw with your right hand on the
rear handle and your left hand on the front handle.
Holding the chain saw with a reversed hand configuration
increases the risk of personal injury and should never be
f Hold the power tool by insulated gripping surfaces on-
its own cord. Saw chains contacting a “live” wire may
make exposed metal parts of the power tool “live” and
could give the operator an electric shock.
f Wear safety glasses and hearing protection. Further
protective equipment for head, hands, legs and feet is
recommended. Adequate protective clothing will reduce
personal injury by flying debris or accidental contact with
the saw chain.
f Donotoperateachainsawinatree.Operationofachain
saw while up in a tree may result in personal injury.
f Always keep proper footing and operate the chain saw
only when standing on fixed, secure and level surface.
Slippery or unstable surfaces such as ladders may cause a
loss of balance or control of the chain saw.
f When cutting a limb that is under tension be alert for
spring back. When the tension in the wood fibres is re-
leased the spring loaded limb may strike the operator
and/or throw the chain saw out of control.
f Use extreme caution when cutting brush and saplings.
The slender material may catch the saw chain and be
whipped toward you or pull you off balance.
f Carry the chain saw by the front handle with the chain
saw switched off and away from your body. When
transporting or storing the chain saw, always fit the
guide bar cover. Proper handling of the chain saw will re-
duce the likelihood of accidental contact with the moving
saw chain.
f Follow instructions for lubricating, chain tensioning
andchangingaccessories. Improperlytensionedorlubri-
cated chain may either break or increase the chance for
f Keep handles dry, clean, and free from oil and grease.
Greasy, oily handles are slippery causing loss of control.
f Cut wood only. Don’t use chain saw for purposes not in-
tended. For example: do not use chain saw for cutting
the chain saw for operations different than intended could
result in a hazardous situation.
Causes and operator prevention of kickback:
– Kickback may occur when the nose or tip of the guide bar
touches an object, or when the wood closes in and pinches
the saw chain in the cut.
– Tip contact in some cases may cause a sudden reverse re-
action, kicking the guide bar up and back towards the opera-
– Pinching the saw chain along the top of the guide bar may
push the guide bar rapidly back towards the operator.
– Either of these reactions may cause you to lose control of
the saw which could result in serious personal injury. Do not
a chain saw user, you should take several steps to keep your
cutting jobs free from accident or injury.
Kickback is the result of tool misuse and/or incorrect operat-
ing procedures or conditions and can be avoided by taking
proper precautions as given below:
f Maintain a firm grip, with thumbs and fingers encir-
and position your body and arm to allow you to resist
operator, if proper precautions are taken. Do not let go of
the chain saw.
f Donotoverreachanddonotcutaboveshoulderheight.
ter control of the chain saw in unexpected situations.
f Only use replacement bars and chains specified by the
manufacturer. Incorrect replacement bars and chains
may cause chain breakage and/or kickback.
f Follow the manufacturer’s sharpening and mainte-
nance instructions for the saw chain. Decreasing the
depth gauge height can lead to increased kickback.
f Children and juveniles, with the exception of appren-
tices older than 16 years and under supervision, may
not operate the chain saw. The same applies for per-
sons who do not or do not sufficiently knowhow to han-
dle the chain saw. The operating instructions should al- Page 21 Tuesday, August 23, 2011 3:50 PM
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1 609 929 V11 | (23.8.11) Bosch Power Tools
ways be ready to hand. Persons unfit or tired must not
operate the chain saw.
f Always ensure all handles and guards are fitted when
using the machine. Never attempt to use an incomplete
machine or one fitted with an unauthorized modification.
f When working with the machine, always hold it firmly
with both hands and provide for a secure stance. The
power tool is guided more secure with both hands.
f Always wait until the machine has come to a complete
stop before placing it down. The tool insert can jam and
lead to loss of control over the power tool.
It is recommended that the first time user should have practi-
cal instruction in the use of the chainsaw and the protective
equipment from an experienced operator. The initial practice
should be cutting logs on a saw horse or cradle.
Products sold in GB only: Your product is fitted with an
BS 1363/A approved electric plug with internal fuse (ASTA
approved to BS 1362).
If the plug is not suitable for your socket outlets, it should be
cut off and an appropriate plug fitted in its place by an author-
ised customer service agent. The replacement plug should
have the same fuse rating as the original plug.
The severed plug must be disposed of to avoid a possible
shock hazard and should never be inserted into a mains sock-
et elsewhere.
vice (RCD) with a rated residual current of 30 mA or less.
The following symbols can be important for the operation of your power tool. Please memorise the symbols and their meanings.
The correct interpretation of the symbols helps you operate the power tool better and more secure.
Symbol Meaning
f Read all safety warnings and all instructions. Failure to follow the warnings and instructions
may result in electric shock, fire and/or serious injury.
Remove the plug from the socket or mains immediately before carrying out any adjustments, serv-
icing or maintenance or if the cable is damaged or cut.
Do not use the machine in the rain or leave it outdoors when it is raining.
f Wear safety goggles.
f Wear ear protectors. Exposure to noise can cause hearing loss.
The kickback brake and the run-down brake stop the chain saw within short time.
Only for EC countries:
Do not dispose of power tools into household waste!
According the European Guideline 2002/96/EC for Waste Electrical and Electronic Equipment
and its implementation into national right, power tools that are no longer usable must be collected
separately and disposed of in an environmentally correct manner. Page 22 Tuesday, August 23, 2011 3:50 PM
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Bosch Power Tools 1 609 929 V11 | (23.8.11)
Product Description and Specifica-
Read all safety warnings and all instruc-
tions. Failure to follow the warnings and in-
structions may result in electric shock, fire
and/or serious injury.
While reading the operating instructions, unfold the graphics
page for the machine and leave it open.
Intended Use
The power tool is intended for sawing wood such as wooden
beams, planks, branches, tree trunks, etc., and for sawing of
trees. Cuts can be sawed with or across the grain.
Delivery Scope
if the following parts are complete:
– Chain saw
– Cover
– Chain
– Chain bar
– Chain guard
– Operating instructions
When parts are missing or damaged, please contact your
Product Features
The numbering of the product features refers to the illustra-
tion of the machine on the graphics page.
1 Rear handle (insulated gripping surface)
2 Lock-off button for On/Off switch
3 On/Off switch
4 Oil filler cap
5 Activation lever for kickback brake (hand guard)
6 Front handle (insulated gripping surface)
7 Deactivation mark “for kickback brake”
8 Nose sprocket
9 Chain guard
10 Saw chain
11 Chain bar
12 Gripping teeth
13 Chain-tensioning ring (red)
14 Locking knob
15 Cover
16 Serial number
17 Symbol for rotation and cutting direction
18 Drive sprocket
19 Oil outlet
20 Guide fin for chain bar
21 Fastening bolt
22 Chain tensioning catch
23 Chain catch bolt
24 Oil level gauge
25 Reset button for thermal safety switch
26 Red dot
27 Protective lid of chain-tensioning mechanism
Accessories shown or described are not part of the standard deliv-
ery scope of the product. A complete overview of accessories can
be found in our accessories program.
Technical Data
Chain saw GKE 35 BCE
Article number 0 601 597 6.. 0 601 597 7..
Rated power input W 2100 2100
Chain speed (no-load)* m/s 12 12
Chain bar length cm 35 40
Braking duration of the kickback brake s <0.1 <0.1
Braking duration of the run-down brake s <1 <1
Chain pitch mm
Drive link thickness mm 1.3 1.3
Amount of drive links 52 57
Oil reservoir capacity ml 200 200
Automatic chain oiler z z
Toolless chain tensioning (SDS) z z
Overload Protection z z
*limited via electronic control
The values given are valid for a nominal voltage [U] of 230 V. For different voltages and models for specific countries, these values can vary.
Please observe the article number on the type plate of your machine. The trade names of the individual machines may vary. Page 23 Tuesday, August 23, 2011 3:50 PM
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1 609 929 V11 | (23.8.11) Bosch Power Tools
Noise/Vibration Information
Measured sound values determined according to EN 60745.
Typically the A-weighted noise levels of the product are:
Sound pressure level 95 dB(A); Sound power level
103 dB(A). Uncertainty K =2 dB.
Wear hearing protection!
Vibration total values ah (triax vector sum) and uncertainty K
determined according to EN 60745:
ah=6 m/s2
, K=1.5 m/s2
The vibration emission level given in this information sheet
has been measured in accordance with a standardised test
given inEN60745 and maybe used to compare one toolwith
another. It may be used for a preliminary assessment of expo-
The declared vibration emission level represents the main ap-
plications of the tool. However if the tool is used for different
the vibration emission may differ. This may significantly in-
crease the exposure level over the total working period.
An estimation of thelevelofexposure tovibrationshouldalso
take into account the times when the tool is switched off or
when it is running but not actually doing the job. This may sig-
nificantly reduce the exposure level over the total working pe-
Identify additional safety measures to protect the operator
accessories, keep hands warm, organise work patterns.
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under “Technical data” is in conformity with the fol-
lowing standards or standardization documents: EN 60745
according to the provisions of the directives 2011/65/EU,
2004/108/EC, 2006/42/EC, 2000/14/EC.
agency No. 2140, KEMA Quality GmbH Dresden.
2000/14/EC: Guaranteed sound power level 105 dB(A).
Conformity assessment procedure according to Annex V.
Equipment category: 6
Technical file (2006/42/EC, 2000/14/EC) at:
Robert Bosch GmbH, PT/ESC,
D-70745 Leinfelden-Echterdingen
Robert Bosch GmbH, Power Tools Division
D-70745 Leinfelden-Echterdingen
For Your Safety
f Warning! Switch off, remove plug from mains before
adjusting cleaning or if the cable is cut, damaged or en-
f Caution! Do not touch the rotating chain.
f Do not operate the chain saw near other people, chil-
dren or animals. Do not operate the chain saw after
drinking alcohol or under the influence of intoxicating
drugs or medication.
Your machine is double insulated for safety and requires no
earth connection. The operating voltage is 230 V AC,
50/60 Hz (for non-EU countries 240 V as applicable). Only
use approved extension cables. Contact your Bosch Service
Centre for details.
When operating the chain saw with an extension cable, the
following conductor cross-sections are required:
– min. 1.5 mm2
to a max. cable length of 50 m
– min. 2.5 mm2
to a max. cable length of 100 m
Note: If an extension cable isused itmust be earthed and con-
nected through the plug to the earth cable of your supply net-
work in accordance with prescribed safety regulations.
When using cable drums, these must be completely unreeled.
IEC 66) are permitted for use.
Ifin doubt contacta qualified electricianor the nearestBosch
Service Centre.
f WARNING! Inadequate extension cables can be dan-
gerous. Extension cable, plug and socket must be of
watertight construction and intended for outdoor use.
Cable connections should be kept dry and off the ground.
Soft starting z z
Constant electronic control z z
Weight according to EPTA-Procedure 01/2003 kg 4.6 4.8
Protection class /II /II
Chain saw GKE 35 BCE
*limited via electronic control
The values given are valid for a nominal voltage [U] of 230 V. For different voltages and models for specific countries, these values can vary.
Please observe the article number on the type plate of your machine. The trade names of the individual machines may vary.
Dr. Egbert Schneider
Senior Vice President
Dr. Eckerhard Strötgen
Head of Product
Certification Page 24 Tuesday, August 23, 2011 3:50 PM
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Bosch Power Tools 1 609 929 V11 | (23.8.11)
It is recommended for increased electrical safety to use a Re-
sidual Current Device (RCD) with a tripping current of not
more than 30 mA. Alwayscheck your RCD every time you use
If the supply cord is damaged, it must be replaced by a Bosch
Service Centre.
For products not sold in GB:
WARNING: For your safety, it is required that the plug at-
tached to the machine is connected with the extension cord.
The coupling of the extension cord must be protected against
splash water, be made of rubber or coated with rubber. The
extension cord must be used with a cable strain relief.
Mounting and Tensioning the Chain Saw
f Do not connect the chain saw to mains before it is com-
pletely assembled.
f Always wear protective gloves when handling the
Chain and Chain Bar Assembly (see figure A)
– Unpack all parts carefully.
– Align the 2 arrows on the chain-tensioning ring 13 and the
cover 15 ( ).
– Place the chain saw on any suitable flat surface.
f Use only chains with a drive link thickness of 1.3 mm.
– Slide the saw chain 10 in the slot around the chain bar 11.
Ensure the saw chain is in the correct running direction by
saw chain 10 is slid on easier when holding the chain bar
11 vertical.
– Fitthe chain linksaroundthe drivesprocket18andmount
the chain bar 11 in such a manner that the guide fins 20 in
front and behind the fastening bolt 21 engage into the key-
way of the chain bar 11.
– Check if all parts are seated properly and hold the chain
bar and the chain in this position.
– Fit the cover 15 exactly and take care that the chain catch
bolt 23 engages into the groove of the cover plate 15.
– Lightly tighten the cover 15 with the locking knob 14.
– The chain is not yet tensioned. The saw chain is tensioned
as described in section “Tensioning the Saw Chain”.
Tensioning the Saw Chain (see figures A and C)
Always check thechaintensionbefore use, afterthe first cuts
and regularly during use approx. every 10 minutes. Upon ini-
tial operation, new chains can lengthen considerably.
lubrication and correct tensioning.
Avoid tensioning the chain if it is hot, as this will cause the
chain to become overtensioned and face too tightly against
the chain bar when it cools down.
– Place the chain saw on any suitable flat surface.
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1 609 929 V11 | (23.8.11) Bosch Power Tools
– Turn locking knob 14 approx. 1 – 3 turns anticlockwise to
loosen the chain bar.
– Check if the chain links are correctly located in the slot
around the chain bar 11 and on the drive sprocket 18.
– Turntheredchain-tensioningring13clockwiseratcheting
until the correct chain tension is reached. The ratchet
mechanism prevents the chain tension from loosening. If
the chain-tensioning ring 13 is hard to turn, loosen the
locking knob 14 further in anticlockwise direction. The
locking knob 14 may also turn, when adjusting the chain-
tensioning ring 13.
– The saw chain 10 is correctly tensioned when it can be
raised approx. 3 – 4 mm from the chain bar in the centre.
This should be done by using one hand to raise the saw
chain against the weight of the machine.
– If the saw chain 10 is overtensioned, turn the chain-ten-
sioning ring 13 in anticlockwise direction.
Clamping the Chain Bar
– Whenthechain10 istensioned,clampthechainbar11by
turning the locking knob 14 in clockwise direction. Do not
use a tool for this.
Saw-chain Lubrication (see figures A–B)
Note: The chain saw is not supplied filled with oil. It is essen-
tial to fill with oil before use. Operating the chain saw without
chain oil or when the oil level is below the minimum mark will
result in damage to the chain saw.
Chain life and cutting capacity depend on optimum lubrica-
tion. Therefore, the chain is automatically lubricated with
chain oil during operation via the oil outlet 19.
Filling the oil reservoir:
– Set chain saw on any suitable surface with the oil filler cap
4 facing upward.
– Clean area around the oil filler cap 4 with a cloth and un-
screw the cap.
– Do not remove filter insert during filling.
– Add Bosch biodegradable chain saw oil until reservoir is
– Avoid dirt or debris from entering the oil reservoir. Screw
on oil filler cap 4 again and tighten.
Note: Four small compensation channels allow for pressure
Please take care to place down the chain saw withthe oilfiller
cap 4 facing upward.
old oil. Use of non approved oil will invalidate the warranty.
Dust/Chip Extraction
f Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one’s health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
Starting Operation
f Observe the mains voltage! The voltage of the power
source must correspond with the data on the type plate of
the machine.
Switching On and Off
Hold the chain saw as described in section “Working with the
Chain Saw”.
To start the machine, first push the lock-off button for the
On/Off switch2 and thenpresstheOn/Off switch 3and keep
it pressed.
To switch off the machine, release the On/Off switch 3.
Note: For safety reasons, the On/Off switch 3 cannot be
locked; it must remain pressed during the entire operation.
Note: Do not stop chain saw after sawing by actuating the
front hand guard 5 (activating the kickback brake).
Reduced starting current
The electronic reduced starting current limits the power con-
sumption when switching the tool on and enables operation
from a 13 ampere fuse.
Temperature Dependent Overload Protection
In case of overload, e. g., when the saw chain is dull, the mo-
tor can stop due to actuation of the thermal safety switch.
Press the reset button 25 to reset the safety switch. After-
wards,the chainsawmustbeoperatedat no-loadfor approx.
1 minute.
14 13
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Bosch Power Tools 1 609 929 V11 | (23.8.11)
Run-down Brake/Kickback Brake (see figure D)
The chain saw is equipped with two safety features:
The run-down brake stops the saw chain after releasing the
On/Off switch 3.
The kickback brake isa safety mechanism activated through
the front hand guard 5 when kickback occurs. Chain stop re-
sponse time is 0.1 seconds.
The following function check should be carried out at regular
intervals. Push the front hand guard 5 forward (position o)
so that the red dot 26 under the mark 7 becomes visible, and
briefly start the chain saw. The saw chain must not start. To
5 back (position n), so that the red dot 26 under the mark 7
is covered.
Working with the Chain Saw
Before Cutting
Before starting operation and periodically during cutting, car-
ry out the following checks:
– Is the chain saw in a fail-safe condition?
– Is the oil reservoir filled? Check oil level gauge prior to
starting and regularly during operation. Refill oil when oil
level has reached the bottom edge of the viewing glass.
The oil tank filling will last approx. 15 minutes, depending
on sawing intensity and stops.
– Is the saw chain properly tensioned and sharp? Check
chain tension every 10 minutes during operation. Upon in-
itialoperation, new chains can lengthen considerably. The
condition of the chain influences the cutting performance.
Only a sharp chain protects from overload.
– Is the kickback brake deactivated and its function en-
– Are you wearing the required protective equipment? Wear
safety glasses and hearing protection. Further protective
equipment for head, hands, legs and feet is recommend-
ed.Suitableprotectiveclothing reducesthedanger ofinju-
ry from thrown about cutting material and accidental
touching of the saw chain.
Kickback (see figure D)
saw, occuring when the chain (at the tip of the chain bar)
comes in contact with a log or wood, or when the chain be-
comes jammed.
When kickback occurs, the chainsaw reacts unpredictable
and can cause heavy injuries to the operator or bystanders.
Particular attention must be given when sawing sidewards,
slanted or during length cuts, as the gripping teeth 12 usually
can not be applied.
To avoid kickback:
– Saw with the chain bar at a flat angle.
– Never work with a loose, widely stretched or heavily worn
out saw chain.
– Sharpen the saw chain as specified.
– Never saw above shoulder height.
– Never work with the tip of the chain.
– Always hold a chain saw firmly with both hands.
– Always use a Bosch low-kickback saw chain.
– Apply the metal gripping teeth 12 for leverage.
– Ensure correct chain tension.
General Behaviour (see figures D – G)
Always hold the chain saw firmly with both hands. Front han-
dle with the left hand and rear handle with the right hand. Ful-
lygripboth handleswiththumbandfingersat alltimesduring
operation. Never operate chain saw using only one hand. En-
sure power cord is located to the rear, and keep it out of the
range of the saw chain and cutting material; position yourself
in such a manner that the mains cable can not get caught in
branches and twigs.
Use the chain saw only with secure footing. Hold the chain
saw at the right-hand side of your body.
The chain must be running at full speed before it makes con-
tact with the wood. Use the gripping teeth 12 to support the
chain saw on the wood. Use the gripping teeth as a leverage
point while cutting.
Reset the gripping teeth at a lower point when sawing thicker
logs or tree trunks. For this, pull the chain saw slightly back-
wardsuntilthegrippingteeth release,andrepositionatlower
level to continue sawing. Do not remove the chain saw com-
pletely out of the cut.
Do not force the saw chain while cutting, let the chain do the
work, using the gripping teeth 12 to apply minimal leverage
Never operate the chain saw witharmsfully extended. Do not
attempt to saw areas which are difficult to reach, or on a lad-
der. Never saw above shoulder height.
Sawing is optimized when the chain speed remains steady
during cutting.
Beware when reaching the end of the cut. The weight of the
chain saw changes unexpectedly as it cuts free from the
wood. Danger of injury to the legs and feet.
Always remove the chain saw from a wood cut while the saw
chain is running.
Cutting Logs (see figures E and H)
When cutting logs, observe the following safety instructions:
Support logs so that the face sides at the cut do not close in
against each other, which would result in the chain being
Position and set short logs safely before sawing.
care to avoid hitting stones, nails, etc., as these could be
serious injury to the operator or bystanders.
Keep a running chain saw clear of wire fencing or the ground.
Length cuts must be carried out with particular care, as lever-
age with the gripping teeth 12 is notpossible. Saw ata flatan-
gle to avoid kickback.
When working on a slope, operate above or to the side of the
trunk or laying tree.
Be careful not to trip over tree stumps, branches, roots, etc. Page 27 Tuesday, August 23, 2011 3:50 PM
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1 609 929 V11 | (23.8.11) Bosch Power Tools
Cutting Wood under Tension (see figure H)
f Be extremely careful when sawing wood, branches or
trees under tension. Leave saw jobs like these to
trained professionals. There is a high risk of accidents.
When sawing logs supported on both ends, start the cut from
above (Y) about one third of the diameter into the log and
avoid splitting of the log or jammingof the saw. Avoid contact
of the saw chain with the ground.
When sawing logs supported on only one end, start the cut
from below (Y) about one third of the diameter into the log
and then finish the cut at the same spot from above (Z), in or-
der to avoid splitting of the log or jamming of the saw.
Felling Trees (see figure I)
f Always wear hard hat to protect head against falling
f The chain saw may only be used to fell trees smaller in
diameter than the length of the chain bar.
f Securetheworkarea.Ensurenopersonsoranimalsare
in the vicinity of the falling tree (n).
f Never attempt to free a jammed chain saw with the mo-
tor running. Use wooden wedges to free a jammed
chain saw.
When cutting and felling operations are being performed by
two or more persons at the same time, the felling operations
of at least twice the height of the tree being felled. Trees
should not be felled in a manner that would endanger any per-
be notified immediately.
The chain saw operator should keep on the uphill side of the
terrain as the tree is likely to roll or slide downhill after it is
An escape path (o) should be planned and cleared as neces-
sary before cuts are started. The escape path should extend
back and diagonally to the rear of the expected line of fall.
Before felling is started, consider the natural lean of the tree,
which way the tree will fall.
Remove dirt, stones, loose bark, nails, staples, and wire from
the tree.
Notching undercut: Make the notch (X – W) 1/3 the diame-
ter of the tree, perpendicular to the direction of fall. Make the
lower horizontal notching cut first. This will help to avoid
pinching either the saw chain or the guide bar when the sec-
ond notch is being made.
Felling back-cut: Make the felling back-cut (Y) at least
50 mm higher than the horizontal notching cut. Carry out the
felling back-cut parallel to the horizontal notching cut. Make
the felling back-cut so that enough wood is left to act as a
hinge. The hinge-wood keeps the tree from twisting and fall-
ing in the wrong direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should begin to
– If there is any chance that the tree may not fall in the de-
sired direction or may rock back and bind the saw chain,
stop cutting and switch the chain saw off. Use wedges (Z)
of wood, plastic or aluminium to open the cutand drop the
tree along the desired line of fall.
– When the tree does not begin to fall when the felling gets
close to the hinge, remove the chain saw from the cut,
the horizontal cut.
When the tree begins to fall, remove the chain saw from the
cut (if not already taken place), stop the motor, and put the
chain saw down. Leave the danger area via the retreat path
planned. Be alert for overhead limbs falling and watch your
Limbing a Tree (see figure K)
Limbing is removing the branches from a fallen tree. When
limbing, leave larger lower limbs to support the log off the
up to avoid binding the chain saw.
Bucking a Log (see figures L – O)
Bucking is cutting a log into lengths. It is important to make
sure your footing is firm and your weight is evenly distributed
ported by the use of limbs, logs or chocks. Follow the simple
directions for easy cutting.
the top (overbuck).
When the log is supported on one end, cut 1/3 the diameter
from the underside (underbuck). Then make the finished cut
by overbucking to meet the first cut.
from the top overbuck. Then make the finished cut by under-
bucking the lower 2/3 to meet the first cut.
When bucking on a slope, always stand on the uphill side of
the log. When “cutting through”, release the cutting pressure
near the end of the cut without relaxing your grip on the chain
saw handles in order to maintain complete control. Don’t let
the chain contact the ground. After completing the cut, wait
for the saw chain to stop before you move the chain saw. Al-
ways stop the chain saw motor before moving from tree to
tree. Page 28 Tuesday, August 23, 2011 3:50 PM
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English | 29
Bosch Power Tools 1 609 929 V11 | (23.8.11)
The following chart lists problem symptoms, possible causes and corrective action, if your machine does not operate properly.
If these do not identify and correct the problem, contact your service agent.
f Warning: Switch off and remove plug from mains before investigating fault.
Maintenance and Service
Maintenance and Cleaning
f Warning! Switch off, remove plug from mains before
adjusting cleaning or if the cable is cut, damaged or en-
f For safe and proper working, always keep the machine
and ventilation slots clean.
ing maintenance regularly.
Regulary check the chain saw for obvious defects such as
loose, dislodged or damaged saw chain and chain bar, loose
fixings and worn or damaged components.
first loosened with the chain tensioning ring 13. Disassembly
of the chain saw without first loosening the saw chain can
damage the chain saw.
Check that covers and guards are undamaged and correctly
fitted. Carry out necessary maintenance or repairs before us-
If the chain saw should fail despite the care taken in manufac-
customer services agent for Bosch power tools.
Note: Before returning the chain saw, ensure all oil in the oil
reservoir has been emptied. For this, remove the sieve from
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the type plate of
the chain saw.
Replacing/Changing the Saw Chain and Chain Bar
(see figure A)
Check the saw chain and chain bar according to section “Ten-
sioning the Saw Chain”.
The guide slot around the chain bar will wear with time. When
replacing the saw chain, turn the chain bar by 180° to allow
even wear. The chain tensioning catch 22 must also be re-
mounted on the chain bar.
Check the drive sprocket 18. If it is worn out or damaged due
to strain, have it exchanged by an authorized Bosch after-
sales service.
Problem Possible Cause Corrective Action
Chain saw fails to operate Kickback brake is activated Pull activation lever for kickback brake (hand
guard) 5 back in position n, so that the red dot 26
is covered
Plug not connected Connect plug
Mains socket faulty Use another socket
Fuse faulty/blown Replace fuse
Extension cable damaged Try without extension cable
Chain saw operates intermit-
Mains cable defective Check mains cable and have it replaced, if required
External or internal wiring defect Contact your Bosch Service Centre
On/Off switch 3 defective Contact your Bosch Service Centre
Saw chain dry No oil in reservoir Refill oil
Vent in oil filler cap 4 clogged Clean oil filler cap 4
Oil passage clogged Clean oil passage
Brake does not stop saw
Kickback brake/run-down brake defective Contact your Bosch Service Centre
Saw chain/guide bar hot No oil in reservoir Refill oil
Vent in oil filler cap 4 clogged Clean oil filler cap 4
Oil passage clogged Clean oil passage
Chain tension too high Adjust chain tension
Dull saw chain Sharpen saw chain or replace
Chain saw rips, vibrates,
does not saw properly
Chain tension too loose Adjust chain tension
Dull saw chain Sharpen saw chain or replace
Chain worn out Replace saw chain
Chain teeth are facing in the wrong direc-
Reassemble with chain in correct direction Page 29 Tuesday, August 23, 2011 3:50 PM
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1 609 929 V11 | (23.8.11) Bosch Power Tools
Sharpening the Saw Chain
Have your chain sharpened professionally at your authorized
Bosch after-sales service or sharpen the chain yourself using
the Bosch sharpening kit or the Dremel Multi power tool with
the appropriate grinder (1453). Observe the sharpening in-
structions provided with the sharpening kit.
Checking the Automatic Oiler
Proper functioning of the automatic saw chain oiler can be
checked by running the chain saw and pointing the tip of the
chain bar towards a piece of cardboard or paper on the
ground. Do not touch the ground with the chain and ensure a
safety clearance of 20 cm. If an increasing oil pattern devel-
opes, the automatic oiler is operating fine. If there is no oil
pattern despite a full oil reservoir, see section “Troubleshoot-
ing” or contact your authorized Bosch after-sales service.
After Use/Storage
Clean the moulded plastic housing of the chain saw using a
soft brush and clean cloth. Do not use water, solvents or pol-
ishes. Remove all debris, especially from the motor cooling
After 1 – 3 hours of use, remove the cover 15, the chain bar
11 and the saw chain 10, and clean them using a brush.
Clean the area under the cover 15, the drive sprocket 18 and
the chain bar assembly from adherant debris using a brush.
Clean the oil outlet 19 with a clean cloth.
If the chain tensioning mechanism in the cover 15 becomes
difficult to operate, remove the protective lid 27, turn the
locking knob 14 and the chain-tensioning ring 13 against
each other, so that debris is loosened from the mechanism
and can be discarded. Carefully strike or tap out debris from
the cover 15. If the mechanism is heavily clogged, use a soft
brush or compressed air for cleaning. Do not use tools of any
kind. (see figure J)
If the chain saw is to be stored for a longer period of time,
clean the saw chain 10 and the chain bar 11.
Store the chain saw in a secure, dry place, out of the reach of
Please take careto placedown the chain saw withthe oilfiller
cap 4 facing upward.
When storing in the sales packaging, the oil reservoir must be
completely emptied.
Saw chain
for chain bar, 350 mm . . . . . . . . . . . . . . . . . . F 016 800 239
for chain bar, 400 mm . . . . . . . . . . . . . . . . . . F 016 800 240
Chain bar with saw chain
350 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 016 800 241
400 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 016 800 242
Additional accessories
Chain sharpening/cleaning kit . . . . . . . . . . . . F 016 800 263
Saw chain oil, 1 litre . . . . . . . . . . . . . . . . . . . . 2 607 000 181
Saw chain oil, 5 litre . . . . . . . . . . . . . . . . . . . . F 016 800 111
Protective gloves. . . . . . . . . . . . . . . . . . . . . . . 2 607 000 134
Safety goggles. . . . . . . . . . . . . . . . . . . . . . . . . F 016 800 178
SNR 19 hearing protection. . . . . . . . . . . . . . . 2 607 990 042
SNR 24 hearing protection. . . . . . . . . . . . . . . 2 607 990 043
Transport protection. . . . . . . . . . . . . . . . . . . . 1 605 510 329
After-sales Service and Customer Assistance
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
Our customer service representatives can answer your ques-
tions concerning possible applications and adjustment of
products and accessories.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
UB 9 5HJ
Tel. Service: +44 (0844) 736 0109
Fax: +44 (0844) 736 0146
Origo Ltd.
Unit 23 Magna Drive
Magna Business Park
City West
Dublin 24
Tel. Service: +353 (01) 4 66 67 00
Fax: +353 (01) 4 66 68 88
Australia, New Zealand and Pacific Islands
Robert Bosch Australia Pty. Ltd.
Power Tools
Locked Bag 66
Clayton South VIC 3169
Customer Contact Center
Inside Australia:
Phone: +61 (01300) 307 044
Fax: +61 (01300) 307 045
Inside New Zealand:
Phone: +64 (0800) 543 353
Fax: +64 (0800) 428 570
Outside AU and NZ:
Phone: +61 (03) 9541 5555 Page 30 Tuesday, August 23, 2011 3:50 PM

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