Viking GB 370 S User manual

GB 370 S
Gebrauchsanleitung
Instruction manual
Manuel d’utilisation
Gebruiksaanwijzing
Istruzioni per l'uso
Manual de instrucciones
Manual de utilização
Bruksanvisning
Bruksanvisning
Käyttöopas
Betjeningsvejledning
Instrukcja obsługi
Navodila za uporabo
Návod na obsluhu
Használati útmutató
Upute za uporabu
Návod k použití
Lietošanas pamācība
Naudojimo instrukcija
DE
EN
FR
NL
IT
ES
PT
NO
SV
FI
DA
PL
SL
SK
HU
HR
CS
LV
LT
Instrucţiuni de utilizare
Οδηγίες χρήσης
Инструкция по эксплуатации
Посібник зексплуатації
Kasutusjuhend
Пайдаланушының
нұсқаулығы
RO
EL
RU
UK
ET
KK
GB 370.2 S
www.viking-garden.comD

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DEFRNLITESPTNOSVFIDAPLSLSKHU EN
0478 216 9901 D - EN
Dear Customer,
Thank you for choosing a VIKING quality
product.
This product has been produced using
state-of-the-art production methods and
extensive quality assurance procedures,
because our goal is only achieved if you,
the customer, are satisfied with your
machine.
If you have any questions concerning your
machine, please contact your dealer or our
sales agency directly.
I hope that your VIKING machine will
give you great enjoyment.
Management
Printed on chlorine-free bleached paper. Paper is recyclable. Cover is halogen free.
1. Table of contents
Notes on the instruction manual 28
General 28
Instructions for reading the
instruction manual 28
Machine overview 28
For your safety 28
General 28
Refilling the tank – handling petrol 29
Clothing and equipment 30
Transporting the machine 30
Before operation 30
Working with your machine 31
Maintenance and repairs 32
Storage for prolonged periods
without operation 33
Disposal 33
Description of symbols 34
Standard equipment 34
Preparing the machine for
operation 35
Installing ejection chute extension 35
Installing wheels and chassis 35
Installing the discharge flap 35
Opening and closing the discharge
flap 35
Installing the blade disc 35
Removing the blade disc 35
Installing the feed chute 36
Removing the feed chute 36
Fuel and engine oil 36
Notes on working with the
machine 36
Working area for operator 36
What material can be processed? 36
What material cannot be
processed? 36
Maximum branch diameter 36
Feeding the garden shredder 36
Correct machine load 37
Safety devices 37
Motorstop 37
Protective covers 37
Operating the machine 37
Starting the engine 37
Stopping the engine 37
Shredding 37
Maintenance 37
Engine 37
Cleaning the machine 38
Blade maintenance 38
V-belt maintenance 39
Changing the engine oil 39
Storage and winter break 39
Minimising wear and preventing
damage 39
Transport 40
Pulling or pushing the garden
shredder 40
Lifting or carrying the garden
shredder 40
Transporting the garden shredder
on a load floor 40
Standard spare parts 40
Circuit diagram 41
Environmental protection 41
Manufacturer's declaration of CE
conformity 41
Technical specifications 41
Troubleshooting 42
Service schedule 42
Handover confirmation 42

0478 216 9901 D - EN
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2.1General
This instruction manual constitutes
original manufacturer's instructions in
the sense of EC Directive 2006/42/EC.
VIKING is continually striving to further
develop its range of products; we therefore
reserve the right to make alterations to the
form, technical specifications and
equipment level of our standard
equipment.
For this reason, the information and
illustrations in this manual are subject to
alterations.
This instruction manual is protected by
copyright. All rights reserved, especially
the right of reproduction, translation and
processing using electronic systems.
2.2 Instructions for reading the
instruction manual
Illustrations and texts describe specific
operating steps.
All symbols which are affixed to the
machine are explained in this instruction
manual.
Viewing direction:
Viewing direction when left and right are
used in the instruction manual:
the user is standing behind the machine
(working position).
Section reference:
References to relevant sections and
subsections for further descriptions are
made using arrows. The following example
shows a reference to a section: (Ö7.1)
Designation of text passages:
The instructions described can be
identified as in the following examples.
Operating steps which require intervention
on the part of the user:
●Release screw (1) using a screwdriver,
operate lever (2)...
General lists:
– Use of the product for sporting or
competitive events
Texts with added significance:
Text passages with added significance are
identified using the symbols described
below in order to especially emphasise
them in the instruction manual:
Texts relating to illustrations:
Illustrations relating to use of the machine
can be found in the front of this instruction
manual.
The camera symbol serves to link
the figures on the illustration pages
with the corresponding text
passages in the instruction manual.
4.1General
These safety regulations must
be observed when working with
the machine.
Read the entire instruction
manual before using the
machine for the first time. Keep
the instruction manual in a safe
place for future reference.
Service confirmation 43
2. Notes on the instruction
manual
Danger
Risk of accident and severe injury
to persons. A certain type of
behaviour is necessary or must be
avoided.
Warning
Risk of injury to persons. A certain
type of behaviour prevents possible
or probable injuries.
Caution
Minor injuries or material damage
can be prevented by a certain type
of behaviour.
Note
Information for better use of the
machine and in order to avoid
possible operating errors.
3. Machine overview
1Feed chute
2Engine
3Spark plug socket
4Wheel
5Wheel carrier
6Ejection chute
7Closure screws
8Throttle lever
9Identification plate with serial number
4. For your safety
1
1

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Observe the operating and maintenance
instructions contained in the separate
engine instruction manual.
These safety precautions are essential for
your safety, however the list is not
exhaustive. Always use the machine in a
reasonable and responsible manner and
be aware that the user is responsible for
accidents involving third parties or their
property.
Make sure that you are familiar with the
controls and use of the machine.
The machine must only be used by
persons who have read the instruction
manual and are familiar with operation of
the machine. The user should seek expert
and practical instruction prior to initial
operation. The user must receive
instruction on safe use of the machine
from the vendor or another expert.
During this instruction, the user should be
made aware that the utmost care and
concentration are required for working with
the machine.
Only give or lend the machine, including
any accessories, to persons who are
familiar with this model and how to operate
it. The instruction manual forms part of the
machine and must always be provided to
persons borrowing it.
The machine must only be operated by
persons who are well rested and in good
physical and mental condition. If your
health is impaired, you should consult your
doctor to determine whether working with
the machine is possible. The machine
should not be operated after the
consumption of alcohol, drugs or
medications which impair reactions.
Children, persons with impaired physical,
sensory or mental faculties or those
lacking the appropriate experience, or
persons who are not familiar with the
instructions, must never be allowed to use
the machine.
Never allow children under the age of 16 to
use the machine. Local regulations may
specify a minimum age for users.
Caution – risk of accident!
VIKING garden shredders are suitable for
shredding branch material and plant
trimmings. Their use for other purposes is
not permitted and may be dangerous or
result in damage to the machine.
The garden shredder must not be used
(incomplete list):
– for any other materials (e.g. glass,
metal).
– for tasks other than those described in
this instruction manual.
– for the preparation of foodstuffs
(e.g. crushing ice, mashing pulp).
For safety reasons, any modification to the
machine, except the proper installation of
accessories approved by VIKING, is
forbidden and results in voiding of the
warranty cover. Information regarding
approved accessories can be obtained
from your VIKING specialist dealer.
In particular, any tampering with the
machine which increases the power output
or speed of the engine or motor is
forbidden.
It is not permitted to transport objects,
animals or persons, particularly children,
on the machine.
Particular care is required during use in
public green spaces, parks, sports fields,
along roads and in agricultural and forestry
businesses.
4.2 Refilling the tank – handling petrol
Petrol must only be stored in appropriate,
tested containers (canisters). Always
screw on the fuel tank and canister caps
properly and tightly. Defective caps must
be replaced for safety reasons.
Never use beverage bottles or similar for
disposal or storage of fuels and lubricants.
Persons, particularly children, could be
tempted to drink out of them.
Keep petrol away from sparks,
naked flames, pilot lights, heat
sources, and other ignition
sources. Do not smoke!
Refill the tank out-of-doors and do not
smoke during refilling.
Before refilling the tank, stop the engine
and allow it to cool.
Refilling with petrol must be performed
before the engine is started. When the
engine is running or is hot, the tank cap
must not be removed and the tank must
not be refilled with petrol.
Do not overfill the fuel tank!
To give the fuel room to expand,
never fill the fuel tank past the
lower edge of the filler neck.
Observe the additional
instructions in the engine
instruction manual.
Risk of death from suffocation!
Packaging material is not a toy -
danger of suffocation! Keep
packaging material away from
children.
Danger to life!
Petrol is poisonous and extremely
inflammable.

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If petrol is spilled, the engine must only be
started after the petrol-contaminated area
has been cleaned. All attempts at starting
must be avoided until the petrol fumes
have dispersed (wipe dry).
Any spilt fuel must be wiped up
immediately.
Clothing must be changed if it comes into
contact with petrol.
Never store the machine with petrol in the
tank inside a building. The resulting petrol
fumes could come into contact with naked
flames or sparks and could be ignited.
If it is necessary to drain the tank, this must
be done out of doors.
4.3 Clothing and equipment
Always wear sturdy footwear
with high-grip soles when
working. Never work barefoot
or, for example, in sandals.
Also always wear sturdy gloves
when working and in particular
also when performing
maintenance operations or
transporting the machine.
Always wear safety glasses and
hearing protection when
working. Wear them at all times.
Wear suitable, close-fitting
clothing when working with the
machine, e.g. overalls, but not
work coats. Do not wear
scarves, ties, jewellery, clothing with
dangling straps or cords or other
protruding articles of clothing when
working with the machine.
Long hair must be tied up and secured
(headscarf, cap, etc.) at all times when
operating or performing work on the
machine.
4.4 Transporting the machine
Always wear gloves in order to prevent
injuries due to sharp-edged and hot
components.
Do not transport the machine with the
engine running. Switch off the engine, let
the blades come to a standstill and remove
the spark plug socket prior to transport.
Only transport the machine once the
engine has cooled down and with an
empty fuel tank.
Only transport the machine with the feed
chute properly fitted
Risk of injury due to exposed blades.
Pay particular attention to the weight of the
machine, especially when tilting.
Use suitable loading aids (loading ramps,
lifters).
Secure the machine on the load floor using
adequately dimensioned fastening
material (straps, ropes etc.) at the
fastening points described in this
instruction manual. (Ö13.3)
Push or pull the machine at walking pace
only. Do not tow!
When transporting the machine, always
observe regional legislation, especially
regarding load security and the transport
of objects on load floors.
4.5 Before operation
Make sure that only persons who are
familiar with the instruction manual are
permitted to use the machine.
Check the fuel system (particularly visible
parts such as e.g. tank, tank cap, hose
connections) before operating the
machine. In the event of any leaks or
damage, do not start the engine – fire
hazard!
Have the machine repaired by a specialist
dealer prior to operation.
Observe the local regulations regarding
permitted operating times for gardening
power tools with combustion engines or
electric motors.
Defective and all other worn or damaged
parts must be removed before using the
machine. Replace any illegible or
damaged danger signs and warnings on
the machine. Your VIKING specialist has a
supply of replacement stickers and all the
other spare parts.
Before initial operation, it must be ensured
– that the covers and guards are in place
and in good condition
– that all fuel-carrying components are
fitted to the engine and are in good
condition (leak-tight)
– that the tank is in good condition (leak-
tight)
– that the housing and cutting tools
(blades, blade shaft, blade discs, etc.)
are not worn or damaged
– that there is no shredding material in
the machine and that the feed chute is
empty

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0478 216 9901 D - EN
– that all screws, bolts, nuts and other
fastening elements are in place and
properly tightened. Tighten any loose
screws, bolts and nuts prior to initial
operation (observe tightening torques).
Only use the machine out-of-doors and not
close to walls or any other solid objects in
order to prevent the risk of injuries and
property damage (no escape for the user,
broken windows, scratched cars etc.).
The machine must placed in a stable
position on firm and level ground.
Do not use the machine on a paved or
gravel-covered surfaces, as ejected or
thrown-up material could cause injuries.
Before using the machine, always check
that it is properly closed. (Ö7.7)
The switch and safety devices installed in
the machine must not be removed or
bypassed.
4.6 Working with your machine
Never work when animals or
persons, particularly children,
are in the danger area.
Do not operate the machine in the rain or
during thunder storms, particularly when
there is a risk of lightning strike.
The risk of accidents is higher if the ground
is damp due to increased danger of
slipping.
Particular caution should be exercised
during working in order to prevent slipping.
If possible, avoid using the machine when
the ground is damp.
Only work during the day or with good
artificial light.
Keep the working area neat and tidy at all
times. Remove tripping hazards such as
stones, branches, cables etc.
The operator should not stand any higher
than the level of the base of the machine.
Exhaust gases:
The machine generates
poisonous exhaust gases when
the engine is running. The
gases contain poisonous
carbon monoxide, a colourless and
odourless gas, as well as other pollutants.
The engine must never be operated in
closed or poorly ventilated spaces.
The machine must be positioned so that it
is not necessary to work facing the
direction of the exhaust gases.
Starting:
Place the machine in a stable and upright
position prior to starting. The machine
must never be operated in a horizontal
position.
Do not pull the recoil starter rope if the
machine is not properly closed and the
blades are exposed.
Risk of injury due to rotating blades!
Exercise care when starting the machine
and observe the instructions contained in
the section entitled "Operating the
machine" (Ö10.1). Starting the machine
in accordance with these instructions
reduces the risk of injury.
Risk of injury!
If the starter rope recoils at speed, the
hand and arm will be pulled towards the
engine faster than the starter rope can be
released. This kickback can result in
broken bones, crush injuries and sprains.
Do not stand in front of the discharge
opening when starting the engine or
switching on the motor. There must be no
shredding material in the garden shredder
when it is started or switched on.
Shredding material may be ejected and
lead to injuries.
The machine must not be tilted during
start-up.
Working:
When the machine is running, never put
your face or any other part of your body
above the feed chute or in front of the
ejection opening. Always keep you head
and body away from the feed opening.
Never put your hands or any
other part of your body or
clothing into the feed chute or
ejection chute. There is a
considerable risk of injury to eyes, face,
fingers, hands etc.
Always maintain your balance and firm
footing. Do not stretch forward.
Danger to life through poisoning!
In the case of nausea, headache,
impaired vision (e.g. decreasing
field of view) hearing disorder,
dizziness, decreasing power of
concentration, stop working
immediately. These symptoms may
be caused by excessively high
exhaust gas concentrations.
Risk of injury!
Never place your hands or feet
above, underneath or on rotating
parts.

0478 216 9901 D - EN
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The operator must stand in the working
area described when feeding the
shredder. Stay inside the working area and
outside of the ejection zone at all times
during operation of the machine. (Ö8.1)
Risk of injury:
Shredding material may be ejected back
up during operation. Always wear safety
glasses and keep your face away from the
feed opening.
Never tilt the machine when the engine or
motor is running.
If the machine falls over during operation,
immediately switch off the engine and
detach the spark plug socket.
Make sure that there is no shredding
material blocking the ejection chute, as
this could result in a poor shredding
performance or kickbacks.
When feeding the garden shredder, pay
particular attention to ensuring that no
foreign objects such as bits of metal,
stones, plastic, glass, etc. get into the
shredding chamber as this could result in
damage or kickbacks from the feed chute.
Remove blockages for the same reason.
Kickbacks can occur when feeding the
garden shredder with branch material.
Wear gloves.
Stop the engine
– before tilting, pushing or pulling the
machine,
– before unscrewing the closure screws
and opening the machine,
– before re-filling the tank. Allow the
engine to cool down before re-filling the
tank.
Fire hazard!
Beware of the cutting tool
running on for several seconds
before coming to a standstill.
Switch off the engine, detach
the spark plug socket and allow
all rotating tools to come to a complete
standstill
– before leaving the machine unattended
– before lifting or carrying the machine
– before transporting the machine
– before removing blockages at the
cutting unit, in the feed chute or in the
discharge chute
– before working on the cutting unit
– before checking or cleaning the
machine or before carrying out any
other work on it.
If foreign objects get into the cutting tool or
if the machine makes strange noises or
vibrates in an unusual way, switch off the
engine immediately and allow the machine
to come to rest. Detach the spark plug
socket, remove the feed chute and
perform the following steps:
– check the machine, in particular the
cutting unit (blade, blade disc, blade
fastening screw) for damage and have
any necessary repairs carried out by a
technician before restarting and
working with the machine.
– check that all parts of the cutting unit
are seated securely, retighten the
screws if necessary (observe tightening
torques).
– Have damaged parts replaced or
repaired by a technician; the parts must
be of similar quality.
4.7 Maintenance and repairs
Before beginning cleaning, adjustment,
repair and maintenance operations:
●Park the machine on firm and level
ground
●Stop the engine and allow it to cool
down
●Detach the spark plug
socket.
Caution – risk of injury!
Keep the spark plug socket
away from the spark plug; an inadvertent
ignition spark can result in fires or electric
shocks.
Inadvertent contact between the spark
plug and the spark plug socket can result
in unwanted starting of the engine.
Allow the machine to cool down before
working on or around the engine, exhaust
manifold or muffler in particular.
Temperatures of 80° C and above can be
reached. Danger of burns!
Direct contact with engine oil can be
dangerous. Engine oil must not be spilled.
VIKING recommends leaving the task of
topping up engine oil or performing engine
oil changes to a VIKING specialist dealer.
Cleaning:
The complete machine must be cleaned
thoroughly following use. (Ö11.2)
Never use high-pressure cleaners and do
not clean the machine under running water
(e.g. using a garden hose).
Do not use aggressive cleaning agents.
These can damage plastics and metals,
impairing the safe operation of your
VIKING machine.

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In order to prevent fire hazards, keep the
area around the air vents, cooling ribs and
the area of the exhaust free from
e.g. grass, straw, moss, leaves or
escaping grease.
Maintenance operations:
Only maintenance operations described in
this instruction manual may be carried out.
Have all other work performed by a
specialist dealer.
If you do not have the necessary expertise
or auxiliary equipment, please always
contact a specialist dealer.
VIKING recommends that you have
maintenance operations and repairs
performed exclusively by a VIKING
specialist dealer.
VIKING specialist dealers regularly attend
training courses and are provided with
technical information.
Only use tools, accessories or
attachments approved for this machine by
VIKING or technically identical parts.
Otherwise, there may be a risk of
accidents resulting in personal injury or
damage to the machine. If you have any
questions, please consult a specialist
dealer.
The characteristics of original VIKING
tools, accessories and spare parts are
optimally adapted to the machine and the
user's requirements. Genuine VIKING
spare parts can be recognised by the
VIKING spare parts number, by the
VIKING lettering and, if present, by the
VIKING spare parts symbol. On smaller
parts, only the symbol may be present.
For safety reasons, fuel-carrying
components (fuel line, fuel cock, fuel tank,
tank cap, connections, etc.) must be
checked regularly for damage and leaks
and replaced by a technician if necessary
(VIKING recommends VIKING specialist
dealers).
Always keep warning and information
stickers clean and readable. Damaged or
missing stickers must be replaced by new,
original plates from your VIKING specialist
dealer. If a component is replaced with a
new component, ensure that the new
component is provided with the same
stickers.
Only perform work on the cutting unit when
wearing thick work gloves and exercising
extreme care.
Ensure that all nuts, pins and screws,
especially all the cutting unit screws, are
securely tightened, so that the machine is
in a safe operating condition.
Check the entire machine for wear or
damage on a regular basis, particularly
before extended periods when the
machine is not in use (e.g. over winter).
For safety reasons, worn or damaged
parts must be replaced immediately to
ensure that the machine is always in a safe
operating condition.
Never alter the basic setting of the engine
or run at excessive engine speeds.
Components or guards that are removed
for maintenance operations must be
properly reinstalled immediately.
4.8 Storage for prolonged periods
without operation
Allow the engine to cool before storing the
machine in an enclosed space.
Store the machine with empty fuel tank
and the fuel reserve in a lockable and well-
ventilated room.
Ensure that the machine is protected from
unauthorised use (e.g. by children).
Never store the machine with petrol in the
tank inside a building. The resulting petrol
fumes could come into contact with naked
flames or sparks and could be ignited.
If the tank has to be emptied
(e.g. immobilisation before the winter
break), the fuel tank must be emptied out
of doors only (empty the tank by running
the engine out of doors, for example).
Thoroughly clean the machine before
storage (e.g. winter break).
Only store the machine with the spark plug
socket disconnected.
Store the machine in good operational
condition.
Only transport the garden shredder with
the feed chute fitted.
Risk of injury due to exposed blades.
4.9 Disposal
Waste products such as used engine oil or
fuel, used lubricants, filters, batteries and
similar wearing parts can be harmful to
people, animals and the environment, and
must consequently be disposed of
properly.
Consult your recycling centre or your
specialist dealer for information on the
proper disposal of waste products. VIKING
recommends VIKING specialist dealers.
Ensure that old machines are properly
disposed of. Render the machine
unusable prior to disposal. In order to
prevent accidents, remove the ignition
lead, empty the fuel tank and drain the
engine oil in particular.

0478 216 9901 D - EN
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Risk of injury from the blades.
Always store an old garden shredder in a
safe place prior to scrapping. Ensure that
the machine and particularly all the blades
are kept out of the reach of children.
5. Description of symbols
Caution!
Read the instruction man-
ual before initial use.
Caution:
Rotating tool.
Risk of injury!
Rotating tools.
Keep hands and feet away
from apertures when
machine is running.
Risk of injury!
Keep other persons out of
the danger area.
Disconnect spark plug
socket before performing
repairs.
Caution:
The machine/cutting tool
continues to run after being
switched off.
Risk of injury:
Do not climb onto the
machine.
Risk of injury:
Never put your hands or any
other part of your body or
clothing into the feed chute
or ejection chute.
Wear hearing protection.
Wear safety glasses.
Wear work gloves.
Throttle:
STOP
Stopping the engine
MIN
Low speed
MAX
High speed
START
Working position
6. Standard equipment
Item Designation Qty.
AFeed chute 1
BBasic unit 1
CWheel carrier 1
DDischarge flap 1
EEjection chute extension 1
FStrip 1
GWheel 2
HWheel cap 2
IBlade disc 1
JTorx screw
P5x20
5
K1Nut M8 2
K2 Lock nut M8 2
L1Washer A8 2
L2 Washer A10 2
MTorx screw
P5x50
1
NFlat head bolt
M8x45
2
2

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●Place the machine on level and firm
ground when performing all the
operations described.
7.1Installing ejection chute
extension
●Fit ejection chute extension (E)
onto basic unit and install screws (J)
(1-2Nm).
7.2 Installing wheels and chassis
●Attach left and right wheels (G)
with wheel pin (R), washer (L1),
washer (L2) and nut (K1) to
wheel carrier (C).
●Press wheel caps (H) onto wheels.
●Place wheel carrier as shown on firm
and level ground and fit basic unit (B)
into position.
●Insert flat head bolts (N) on the left side
and screw on lock nuts (K2), but do not
tighten them yet.
Install Torx screw (M) on the right side
(1-2Nm).
●Tighten nuts (K2) (10-12Nm).
7.3 Installing the discharge flap
●Set garden shredder on its back.
●Insert strip (F) into ejection chute
extension. Install screws (J) (1-2Nm).
●Lift garden shredder into upright
position.
●Position discharge flap (D) on ejection
chute extension. Ensure that the ribs (1)
inside the flaps on the left and right are
correctly located in the guide groove of
the ejection chute extension (2) when
attaching.
●Press in pins (S) on left and right.
7.4 Opening and closing the
discharge flap
Opening the discharge flap:
●For shredding, fold the discharge
flap (D) upwards and allow the tab (1)
to engage in the ejection chute
extension.
Closing the discharge flap:
●For transport or space-saving storage,
lift the tab (1) slightly and fold away the
discharge flap (D) downwards.
7.5 Installing the blade disc
●Fit protective cap (W), lower spacing
ring (V), blade disc (I), upper spacing
ring (U), deflector (T) and retaining
washer (P) onto blade mounting and
insert screw (O).
●Use installation tool (X) to counterhold
the blade disc. Screw in screw (O)
using combination spanner (Z) and
tighten to a torque of 52 -60 Nm.
7.6 Removing the blade disc
●Use installation tool (X) to
counterhold the blade disc.
●Loosen screw (O) with combination
spanner (Z).
OHexagon screw
M10x55
1
PRetaining washer 1
QClosure screw 2
RWheel pin 2
SPin 2
TDeflector 1
UUpper spacing ring 1
VLower spacing ring 1
WProtective cap 1
XInstallation tool 1
YTorx wrench 1
ZCombination spanner 1
•Instruction manual 1
•Engine
instruction manual
1
7. Preparing the machine for
operation
Risk of injury:
Observe the safety instructions in
the section "For your safety" (Ö4.).
Item Designation Qty.
3
4
5
6
Observe the installation sequence
and tightening torque of 52 -60 Nm
.
Ensure correct position of upper
spacing ring (U) to both blades
when installing.
7
8
9

0478 216 9901 D - EN
36
●Remove screw (O), retaining
washer (P), deflector (T), upper
spacing ring (U) and blade disc (I).
7.7 Installing the feed chute
●Insert closure screws (Q) in the slot of
the feed chute and screw in fully,
applying pressure.
●Attach feed chute (A) to hinge (1) in
basic unit and pivot forwards.
●Tighten both closure screws (Q)
simultaneously.
7.8 Removing the feed chute
●Loosen both closure screws (Q)
until they turn freely. They remain
on the feed chute
●Pivot feed chute (A) to the rear and
remove.
7.9 Fuel and engine oil
Engine oil
Please consult the engine instruction
manual for the type of engine oil to be used
and the oil capacity. Check the oil filling
level at regular intervals (Ösee engine
instruction manual). Avoid exceeding or
falling below the correct oil level.
Fuel
Recommendation:
Fresh good quality fuel, normal unleaded
petrol (Öengine instruction manual)! Use
a funnel when filling the tank with fuel (not
included in standard equipment). Note the
warnings in the section "For your safety".
(Ö4.)
8.1Working area for operator
●For safety reasons, the operator
must stay within the working area
(grey area X) for the entire operating
period (while the motor is switched on
or the engine is running), particularly in
order to prevent injuries due to
shredding material that is ejected
backwards.
8.2 What material can be processed?
Tree or hedge cuttings, as
well as branch material with
many or few side shoots and
twigs can be processed with
the garden shredder.
Tree and hedge cuttings should be
processed when fresh, as the shredding
performance is better with fresh than with
dried-out or wet material.
8.3 What material cannot be
processed?
Stones, glass, bits of metal
(wire, nails, etc.) or plastic
must not be fed into the
garden shredder.
As a general rule:
Any materials that do not belong on the
compost heap should not be processed
using the garden shredder.
8.4 Maximum branch diameter
The data relates to freshly cut branch
material:
Maximum branch diameter
GB 370 S: 45 mm
8.5 Feeding the garden shredder
●Before feeding the garden
shredder, note the working area.
(Ö8.1)
●Observe the maximum branch
diameter. (Ö8.4)
●Insert the branch material
at a slight angle and guide
it along the right-hand
chute wall to the blade unit.
The hard material is
automatically drawn in by
the machine. You should
support and guide longer
branches with your hand
when shredding.
The closure screws (Q) must be
securely fastened to the feed chute
following initial assembly.
Top up engine oil before initial start
(Öengine instruction manual)!
10
11
12
8. Notes on working with the
machine
Risk of injury:
Observe the safety instructions in
the "For your safety" section. (Ö4.)
It is only permitted for one person to
feed the garden shredder.
13
14

37
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0478 216 9901 D - EN
8.6 Correct machine load
The load on the motor or engine of the
garden shredder must never cause the
speed to drop significantly. Always feed
the garden shredder continuously and
steadily. If the speed drops when working
with the garden shredder, stop feeding the
machine in order to relieve the load on the
motor or engine.
9.1Motorstop
The engine/shredding tool can only be
operated when the feed chute has been
properly closed.
When loosening the engine-side closure
screw during operation, the ignition
contact is interrupted and the
engine/shredding tool come to a standstill
after a few seconds.
9.2 Protective covers
The garden shredder is equipped with
protective covers in the feeding and
ejection areas. These include the
complete feed chute with the upper chute
and splash guard, the ejection chute
extension and the discharge flap.
The protective covers ensure that a safe
distance is maintained from the shredding
blades.
10.1Starting the engine
●Check the oil and fuel levels.
(Ö7.9)
●Move the throttle lever (1) to the
START position.
●Pull the recoil starter rope (2) slowly to
the point of compression resistance and
then pull vigorously to arm’s length.
Slowly release the cable so that it can
gradually be rolled up by the starter.
Repeat the starting procedure until the
engine starts.
10.2 Stopping the engine
●Set the throttle lever (1) to the
STOP position.
The engine/shredding tool come to a
standstill following a brief run-down
time.
10.3 Shredding
●Push the garden shredder onto firm and
level ground and set down safely.
●Put on thick gloves, safety glasses and
hearing protection.
●Open the discharge flap. (Ö7.4)
●Start the garden shredder. (Ö10.1)
●Wait until the engine has reached its
maximum speed (idling speed).
●Feed the garden shredder with
shredding material in the correct way.
(Ö8.5)
●After work is completed, stop the
garden shredder (Ö10.2) and clean.
(Ö11.2)
11.1Engine
Maintenance interval:
Before each use
To achieve a long service life, it is always
particularly important to maintain a
sufficient level of oil and to change the oil
and air filter regularly. Observe the
operating and maintenance instructions
contained in the accompanying engine
instruction manual.
The cooling ribs must always be kept clean
to ensure that the engine is adequately
cooled.
9. Safety devices
10. Operating the machine
Risk of injury!
Carefully read and observe the “For
your safety” section before
operating the machine. (Ö4.)
15
16
11. Maintenance
Risk of injury!
Carefully read the section "For your
safety" (Ö4.), particularly the
subsection "Maintenance and
repairs" (Ö4.7), and follow all
safety instructions exactly before
performing any maintenance or
cleaning operations on the
machine.
Detach the spark plug
socket before performing
any maintenance or
cleaning operations.

0478 216 9901 D - EN
38
11.2 Cleaning the machine
Maintenance interval:
After each use
Clean the machine thoroughly each time it
has been used. Care of the machine will
protect it against damage and extend its
service life.
Cleaning position of the garden
shredder:
It is only permitted to clean the machine in
the position shown.
●Remove the feed chute. (Ö7.8)
The machine (engine) may be damaged if
the garden shredder is not positioned as
described.
Never spray water onto
motor or engine components,
seals, bearing points or
electrical parts such as
switches. This would result in
expensive repairs.
If you are unable to remove
the dirt and accumulated
deposits with a brush, a damp
cloth or a stick, VIKING
recommends the use of a
special cleaner (e.g. STIHL special
cleaner).
Do not use aggressive cleaning agents.
Clean the blade discs regularly.
Remove dirt from the cooling ribs, fan
wheel, area around the air filter, exhaust,
etc. to ensure that the engine is
adequately cooled.
11.3 Blade maintenance
Maintenance interval:
Before each use
●Remove the feed chute. (Ö7.8)
●Check the blades for damage (notches
or cracks) and wear; reverse or replace
if necessary.
Wear limits of the blades:
●On the blades, measure the distance
between the bore to the edge of the
blade at several points.
Minimum distance 6mm
Reversing the blades:
●Remove the blade disc. (Ö7.6)
●Unscrew screws (1) and remove
together with nuts (2).
●Remove blade (3) upwards.
●Clean the blade disc.
●Reverse blade (3) and place onto the
blade disc with the sharp edge exposed
and align the bores.
●Insert screws (1) through the bores and
screw on nuts (2). Tighten nuts (2) to
22 --28 Nm.
●Install the blade disc. (Ö7.5)
Sharpening the blades:
Blades which are blunt on both sides must
be sharpened before resuming work.
In order to ensure optimum machine
operation, the blades should only be
sharpened by a technician. VIKING
recommends VIKING specialist dealers.
●Remove the blades for sharpening.
●Cool the blades when sharpening,
e.g. with water. The blade must not be
allowed to display blue colouring, as
this would reduce its cutting quality.
●Sharpen the blade evenly to prevent
vibrations due to imbalance.
●Check blades for damage before
installing: The blades must be replaced
if notches or cracks are visible or if the
blades have reached the wear limits.
●Sharpen blades at a sharpening angle
of 30°.
●Sharpen the blades against the cutting
edge.
●After sharpening, remove any
sharpening burr at the cutting edge
using fine sandpaper.
●Observe the tightening torques
contained in the "Reversing the blades"
section when installing the blades.
17
Risk of injury!
Always wear thick
gloves.
The blades must be reversed or
replaced before the specified wear
limits are reached. VIKING
recommends VIKING specialist
dealers.
The cutting blades are designed as
reversible blades. This means that
blunt blades can be reversed and
the machine is ready for use again.
Always reverse both blades.
18

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11.4 V-belt maintenance
Maintenance interval:
Every 10 operating hours
Check the V-belt for wear and damage by
means of a visual inspection and replace if
necessary.
Check V-belt tension and adjust as
required.
Checking V-belt tension:
●Detach the spark plug socket.
●Loosen screws (1), but do not unscrew
fully (remain on belt guard) and remove
belt guard (2).
●Using your thumb, press on the V-belt
between the two V-belt pulleys.
It must be possible to depress the V-
belt by approx. 10mm.
Adjusting V-belt tension:
●Loosen the engine mounting (not
illustrated):
Loosen 3 bolts of engine mounting, but
do not remove; counterhold nuts on
upper side.
●Tension the V-belt by turning the
adjustment nut (3).
●After adjustment, re-tighten the engine
fastening bolts and install the belt
guard.
11.5 Changing the engine oil
Maintenance interval:
The recommended oil change intervals,
the engine oil to be used and the oil
capacity can be found in the engine
instruction manual.
Oil drain plug:
●Loosen screws (1), but do not unscrew
fully (remain on belt guard) and remove
belt guard (2).
●Remove oil drain plug (3) and drain
engine oil.
●Reinsert oil drain plug (3) and fill with
fresh engine oil. Install belt guard (2).
11.6 Storage and winter break
Store the garden shredder in a dry and
locked place that is generally free of dust.
Make sure that the machine is kept out of
the reach of children.
Only store the garden shredder in good
operating condition and with the feed
chute fitted.
Note the following points when storing the
garden shredder for extended periods
(over winter):
●Thoroughly clean all external parts of
the machine.
●Thoroughly lubricate/grease all moving
parts.
●Empty fuel tank and carburettor (e.g. by
running the engine).
●Unscrew spark plug and pour
approx. 3 cm³ of engine oil into the
engine via the spark plug hole. Turn the
engine several times with the spark
plug removed.
●Re-install the spark plug.
●Perform oil change (Öengine
instruction manual).
●Cover the engine well and store the
machine in a dry, dust-free room in the
upright position.
Important information on maintenance
and care of the product group
Petrol garden shredders
VIKING assumes no liability for material or
personal damage caused by the non-
observance of information contained in the
operating instructions, in particular with
regard to safety, operation and
maintenance, or which arise through the
use of unauthorised attachment or spare
parts.
Please always observe the following
important information for the prevention of
damage or excessive wear to your VIKING
machine:
1. Wearing parts
Some parts of the VIKING machine are
subject to normal wear even when used
properly and must be replaced in due time
depending on type and duration of use.
These include:
Insufficient tensioning increases V-
belt wear, excessive tensioning
may lead to bearing damage.
If you do not have the necessary
knowledge to adjust the V-belt, you
should have a technician perform
this work.
1920
Fire hazard!
Keep the spark plug socket away
from the spark plug hole (danger of
ignition).
12. Minimising wear and
preventing damage

0478 216 9901 D - EN
40
–Blade
–Bladedisc
–V-belt
2. Compliance with the information in
this instruction manual
The VIKING machine must be used,
maintained and stored with the care
described in this instruction manual. Any
damage caused by non-compliance with
the safety, operating and maintenance
instructions is the sole responsibility of the
user.
This applies in particular to:
– Improper use of the product.
– Use of fuel and lubricants not approved
by VIKING (lubricants, petrol and
engine oil, see engine instruction
manual).
– Product modifications not approved by
VIKING.
– The use of attaching parts, attachments
or cutting tools not approved by
VIKING.
– Use of the product for sporting or
competitive events.
– Resultant damage due to continued use
of the product with defective
components.
3. Maintenance operations
All operations listed in the section
"Maintenance" must be performed
regularly.
If these maintenance operations cannot be
carried out by the user, a specialist dealer
must be commissioned to perform them.
VIKING recommends that you have
maintenance operations and repairs
performed exclusively by a VIKING
specialist dealer.
VIKING specialist dealers regularly attend
training courses and are provided with
technical information.
If these operations are neglected, faults
may arise which are the responsibility of
the user.
These include:
– Corrosive and other resultant damage
caused by incorrect storage.
– Damage and resultant damage due to
the use of spare parts which are not
original VIKING parts.
– damage due to maintenance and repair
operations not performed in the
workshops of authorised specialist
dealers.
13.1Pulling or pushing the
garden shredder
●Hold the garden shredder at the
upper chute (1) and tilt to the rear.
●The garden shredder can be pulled or
pushed slowly (walking pace).
13.2 Lifting or carrying the
garden shredder
●When lifting the garden shredder, hold it
at the housing on the right and under
the engine on the left.
13.3 Transporting the garden
shredder on a load floor
●Always place the garden
shredder in the upright position when
transporting it on a load floor.
●Secure the machine against slipping
using suitable fastening materials.
Attach ropes or straps to the wheel
carrier (1) and the feed chute (2).
Blade disc assembly
6903 700 5101
Reversible blade (2x)
6903 702 0101
V-belt
6001 704 2100
13. Transport
Risk of injury!
Before transporting, carefully read
and observe the section "For your
safety", in particular the
"Transporting the machine" section.
(Ö4.4)
21
Due to its heavy weight, at least two
persons are required to lift the
garden shredder. Always wear
suitable protective clothing; the
lower arms and upper part of the
body must be fully covered.
14. Standard spare parts
22
23

41
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0478 216 9901 D - EN
Shredding material should be
composted and not disposed of
in household waste.
The machine, its packaging and
accessories are all produced
from recyclable materials and must be
disposed of accordingly.
By disposing of materials separately, and
in an environmentally friendly manner,
valuable resources can be re-used. For
this reason, the machine should be
disposed of for recycling at the end of its
useful life.
We,
VIKING GmbH
Hans Peter Stihl-Strasse 5
A-6336 Langkampfen/Kufstein
declare under our sole responsibility that
the machine
Shredding machine for plant trimmings
with petrol engine (GB)
conforms to the following EC directives:
97/68/EC, 2000/14/EC, 2014/30/EU,
2006/42/EC
The product has been developed in
conformance with the following standards:
EN 13683
Applicable conformity assessment
procedure:
Appendix V (2000/14/EC)
Name and address of relevant, named
location:
TÜV Rheinland LGA Products GmbH
Tillystraße 2
D-90431 Nürnberg
Compilation and storage of technical
documentation:
Sven Zimmermann
VIKING GmbH
The year of manufacture and serial
number appear on the identification plate
of the machine.
Langkampfen,
2018-01-02 (YYYY-MM-DD)
VIKING GmbH
Head of Design
15. Circuit diagram
1Engine
2Safety switch
3Lustre terminal
BK black
BR brown
BL blue
16. Environmental protection
17. Manufacturer's
declaration of CE conformity
24
manufacturer's
brand:
VIKING
type: GB 370.2 S
serial number 6001
Measured sound power level:
97,4 dB(A)
Guaranteed sound power level:
102 dB(A)
18. Technical specifications
Manufacturer's
brand:
VIKING
Model: GB 370.2 S
Serial number: 6001
Engine, design: 4-stroke com-
bustion engine
Type: Briggs&Stratton
Series 850
Nominal output at
nominal speed:
3,3–3000
kW – rpm
Displacement: 190 ccm
Starter: Rope start
Fuel tank: 1.1 l
Cutting unit drive: permanent
In accordance with Directive 2000/14/EC:
Guaranteed sound
power level L
WAd
102 dB(A)
In accordance with Directive 2006/42/EC:
Sound pressure level
at workplace L
pA
90 dB(A)
Uncertainty K
pA
4 dB(A)
Tightening torque
Bladeset: 52–60Nm

0478 216 9901 D - EN
42
Fault:
Engine does not start
Possible cause:
– Feed chute not properly closed
– Blade disc blocked
– No fuel in tank; fuel line blocked
– Inferior, dirty or old fuel in tank
– Spark plug socket detached from spark
plug; ignition lead not properly fastened
to socket
– Dirty air filter
– Spark plug dirty or damaged; incorrect
electrode gap
– Engine is flooded due to several
starting attempts.
Remedy:
– Close feed chute properly and tighten
screws (Ö7.7)
– Remove shredder deposits from the
housing (Important: first detach spark
plug socket)
– Top up fuel; clean fuel line (Ö7.9)
– Always use fresh, good quality fuel,
normal unleaded petrol; clean
carburettor (Ö7.9)
– Connect spark plug socket; check
connection between ignition lead and
socket  
– Clean air filter  
– Clean or replace spark plug; adjust
electrode gap  
– Remove spark plug and dry; pull recoil
starter rope repeatedly with the spark
plug removed (throttle lever in STOP
position)
Fault:
Engine overheating
Possible cause:
– Dirty cooling ribs
– Oil level in engine too low
– Surface of engine covered with
shredded material
Remedy:
– Clean cooling ribs (Ö11.2)
– Top up engine oil (Ö7.9)
– Remove shredded material from the
engine
Fault:
Shredding material is not drawn in
Possible cause:
– Blunt or incorrectly ground blades
Remedy:
– Reverse or re-sharpen blade; ensure
sharpening angle of 30° (Ö11.3) 
Fault:
Reduced shredding performance
Possible cause:
– Blunt blades
– Incorrectly ground blades
– Bent blade disc
Remedy:
– Re-sharpen or replace blades (Ö11.3)

– Sharpen blades correctly (Ö11.3) 
– Visually inspect blade disc and replace
if necessary (Ö7.6)
Fault:
Excessive vibration during operation,
abnormal noises, rattling
Possible cause:
– Faulty blade disc or blades
– Loose engine mounting
– Bolts loose
Remedy:
– Check blade discs, blades, blade shaft,
screws, nuts, washers and bearings of
cutting unit, repair if necessary 
– Tighten engine mounting bolts 
– Ensure secure seating of bolts 
20.1Handover confirmation
Tightening torque
Reversible blade: 22 – 28 Nm
L/W/H: 128/77/140 cm
Weight: 45 kg
19. Troubleshooting
@See engine instruction manual.
If necessary, contact a specialist
dealer; VIKING recommends VIKING
specialist dealers.
20. Service schedule