Read Instruction Manual thoroughly
before use and follow all safety
precautions – improper use can
cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga
todas las precauciones de
seguridad dadas en el manual de
instrucciones – el uso incorrecto
puede causar lesiones graves o
mortales.
{
Instruction Manual
Manual de instrucciones
G Instruction Manual
1 - 45
U Manual de instrucciones
46 - 94
Contents
English
Guide to Using this Manual2
Safety Precautions and Working
Techniques3
Using the Unit13
Assembling the Unit15
Cutting Attachment16
Mounting the Bar and Chain16
Tensioning the Chain17
Original Instruction ManualPrinted on chlorine-free paper
Checking Chain Tension18
Fuel18
Fueling19
Chain Lubricant20
Filling Chain Oil Tank20
Checking Chain Lubrication22
Fitting the Harness23
Starting / Stopping the Engine23
Transporting the Unit25
Operating Instructions26
Taking Care of the Guide Bar27
Cleaning the Air Filter27
Engine Management28
Adjusting the Carburetor28
Printing inks contain vegetable oils, paper can be recycled.
Spark Plug29
Storing the Machine30
Checking and Replacing the Chain
Sprocket30
Maintaining and Sharpening the
Saw Chain31
Inspections and Maintenance by
Dealer35
Maintenance and Care36
Main Parts38
Specifications40
Maintenance and Repairs41
Disposal41
Limited Warranty41
STIHL Incorporated Federal
Emission Control Warranty
Statement42
Trademarks44
Allow only persons who fully understand
this manual to operate your pole pruner.
To receive maximum performance and
satisfaction from your STIHL pole
pruner, it is important that you read,
understand and follow the safety
precautions and the operating and
maintenance instructions in chapter
"Safety Precautions and Working
Techniques" before using your pole
pruner. For further information you can
go to www.stihlusa.com.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
manual.
WARNING
Because a pole pruner is a high-speed,
fast-cutting power tool with an extended
reach, special safety precautions must
be observed to reduce the risk of
personal injury. Careless or improper
use may cause serious or even fatal
injury.
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
1
English
Guide to Using this Manual
Pictograms
The meanings of the pictograms
attached to or embossed on the
machine are explained in this manual.
Depending on the model concerned, the
following pictograms may be on your
machine.
Fuel tank for gasoline
and engine oil mixture
Tank for bar and chain oil
Direction of chain rotation
Press to operate manual
fuel pump
Manual fuel pump
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
NLoosen the screw (1).
NLever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
DANGER
Indicates a hazardous situation that, if
not avoided, will result in death or
serious injury.
WARNING
Indicates a hazardous situation that, if
not avoided, could result in death or
serious injury.
NOTICE
Indicates a risk of property damage,
including damage to the machine or its
individual components.
described in this manual, please contact
your STIHL dealer or the STIHL
distributor for your area for assistance.
Symbols in Text
Many operating and safety instructions
are supported by illustrations.
The individual steps or procedures
described in the manual may be marked
in different ways:
NA bullet marks a step or procedure.
2
Engineering Improvements
STIHL’s philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time to time. Therefore,
some changes, modifications and
improvements may not be covered in
this manual. If the operating
characteristics or the appearance of
your machine differs from those
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Safety Precautions and
Working Techniques
Because a pole pruner is
a high-speed, fast-cutting power tool with an
extended reach, special
safety precautions must
be observed to reduce
the risk of personal injury.
It is important that you
read, fully understand
and observe the following
safety precautions and
warnings. Read the
instruction manual and
the safety precautions
periodically. Careless or
improper use may cause
serious or fatal injury.
Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable national, state and local laws,
safety regulations, standards and
ordinances.
WARNING
Do not lend or rent your power tool
without the instruction manual. Be sure
that anyone using it understands the
information contained in this manual.
WARNING
The use of this machine may be
hazardous. The pole pruner chain has
many sharp cutters. If the cutters contact
your flesh, they will cut you, even if the
chain is not moving.
WARNING
Do not cut any material other than wood
or wooden objects. Use your pole pruner
for limbing only.
Do not use it for other purposes, since
misuse may result in personal injury or
property damage, including damage to
the machine.
WARNING
Minors should never be allowed to use
this power tool. Bystanders, especially
children, and animals should not be
allowed in the area where it is in use.
WARNING
To reduce the risk of injury to bystanders
and damage to property, never let your
power tool run unattended. When it is
not in use (e. g. during a work break),
shut it off and make sure that
unauthorized persons do not use it.
Most of these safety precautions and
warnings apply to the use of all STIHL
pole pruners. Different models may have
different parts and controls. See the
appropriate section of your instruction
manual for a description of the controls
and the function of the parts of your
model.
Safe use of a pole pruner involves
1. the operator
2. the pole pruner
3. the use of the pole pruner.
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate
this machine when you are fatigued.
WARNING
Be alert – if you get tired, take a break.
Tiredness may result in loss of control.
Working with any power tool can be
strenuous. If you have any condition that
might be aggravated by strenuous work,
check with your doctor before operating
this machine.
WARNING
Prolonged use of a power tool (or other
machines) exposing the operator to
vibrations may produce whitefinger
disease (Raynaud's phenomenon) or
carpal tunnel syndrome.
These conditions reduce the hand's
ability to feel and regulate temperature,
produce numbness and burning
sensations and may cause nerve and
circulation damage and tissue necrosis.
All factors which contribute to
whitefinger disease are not known, but
cold weather, smoking and diseases or
physical conditions that affect blood
vessels and blood transport, as well as
high vibration levels and long periods of
HT 56 C
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exposure to vibration are mentioned as
factors in the development of whitefinger
disease. In order to reduce the risk of
whitefinger disease and carpal tunnel
syndrome, please note the following:
–Most STIHL power tools are
available with an anti-vibration
("AV") system designed to reduce
the transmission of vibrations
created by the machine to the
operator's hands. An AV system is
recommended for those persons
using power tools on a regular or
sustained basis.
–Wear gloves and keep your hands
warm.
–Keep the AV system well
maintained. A power tool with loose
components or with damaged or
worn AV elements will tend to have
higher vibration levels.
–Maintain a firm grip at all times, but
do not squeeze the handles with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
whitefinger disease or carpal tunnel
syndrome. Therefore, continual and
regular users should closely monitor the
condition of their hands and fingers. If
any of the above symptoms appear,
seek medical advice immediately.
WARNING
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. To
reduce the risk of serious or fatal injury,
persons with a pacemaker should
consult their physician and the
pacemaker manufacturer before
operating this tool.
Proper Clothing
WARNING
To reduce the risk of injury, the operator
should wear proper protective apparel.
WARNING
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protective glasses with
adequate top and side
protection complying with
ANSI Z87 "+" (or your
applicable national standard). To reduce the risk of
injury to your face STIHL
recommends that you
also wear a face shield or
face screen over your
goggles or protective
glasses.
Wear an approved safety hard hat to
reduce the risk of injury to your head.
Power tool noise may damage your
hearing. Wear sound barriers (ear plugs
or ear mufflers) to protect your hearing.
Continual and regular users should have
their hearing checked regularly.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Always wear heavy-duty
work gloves (e.g. made of
leather or other wear
resistant material) when
handling the machine
and the cutting tool.
Heavy-duty, nonslip
gloves improve your grip
and help to protect your
hands.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement. Wear long
pants made of heavy
material to help protect
your legs. Do not wear
shorts, sandals or go
barefoot.
Avoid loose-fitting jackets, scarfs,
neckties, jewelry, flared or cuffed pants,
unconfined long hair or anything that
could become caught on branches,
brush or the moving parts of the unit.
Secure hair so it is above shoulder level.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
with cut retardant inserts
are recommended.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts".
4
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275BA009 KN
WARNING
Never modify this power tool in any way.
Only attachments supplied by STIHL or
expressly approved by STIHL for use
with the specific STIHL model are
authorized. Although certain
unauthorized attachments are useable
with STIHL power tools, their use may,
in fact, be extremely dangerous.
If this tool is subjected to unusually high
loads for which it was not designed (e. g.
heavy impact or a fall), always check
that it is in good condition before
continuing work. Check in particular that
the fuel system is tight (no leaks) and
that the controls and safety devices are
working properly. Do not continue
operating this machine if it is damaged.
In case of doubt, have it checked by your
STIHL servicing dealer.
THE USE OF THE POWER TOOL
Transporting the Power Tool
This power tool should be carried only in
a horizontal position. Grip the shaft in a
manner that the machine is balanced
horizontally. Keep the hot muffler away
from your body and the cutting
attachment behind you.
WARNING
Accidental acceleration of the engine
can cause the chain to rotate and cause
serious injuries.
Always switch off the engine and fit the
scabbard over the cutting attachment
before transporting the power tool.
When transporting it in a vehicle,
properly secure it to prevent turnover,
fuel spillage and damage to the unit.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" in this instruction
manual).
WARNING
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and
serious burn injury or
property damage. Use extreme caution
when handling gasoline or fuel mix. Do
not smoke or bring any fire or flame near
the fuel or the power tool. Note that
combustible fuel vapor may escape from
the fuel system.
Fueling Instructions
WARNING
To reduce the risk of serious injury from
burns, never attempt to refuel the unit
until it has been completely removed
from the operator.
WARNING
Fuel your power tool in well-ventilated
areas, outdoors. Always shut off the
engine and allow it to cool before
refueling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
In order to reduce the risk of burns and
other personal injury from escaping gas
vapor and fumes, remove the fuel filler
cap on your power tool carefully so as to
allow any pressure build-up in the tank
to release slowly. Never remove the fuel
filler cap while the engine is running.
Select bare ground for fueling and move
at least 10 feet (3 m) from the fueling
spot before starting the engine. Wipe off
any spilled fuel before starting your
machine.
WARNING
Check for fuel leakage
while refueling and during
operation. If fuel leakage
is found, do not start or
run the machine until the
leak is fixed and any
leaked fuel has been
wiped away. Take care
not to get fuel on your
clothing. If this happens,
change your clothing
immediately.
WARNING
In order to reduce the risk of fuel spillage
and fire from an improperly tightened
fuel cap, correctly position and tighten
the fuel cap in the fuel tank opening.
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246BA034 KN
Screw Cap
WARNING
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill quantities of fuel. In order to
reduce the risk of fuel
spillage and fire, tighten
the fuel filler cap by hand
as securely as possible.
See also the "Fueling" chapter in this
instruction manual for additional
information.
Before Starting
Take off the chain guard (scabbard) and
inspect the pole pruner for proper
condition and operation. (See the
maintenance chart near the end of the
instruction manual.)
WARNING
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout, stop switch and cutting
attachment. The throttle trigger must
move freely and always spring back to
the idle position. Never attempt to
modify the controls or safety devices.
WARNING
Check fuel system for leaks, especially
the visible parts, e.g., filler cap, hose
connections, manual fuel pump (only for
power tools equipped with a manual fuel
pump). To reduce the risk of personal
injury or property damage from fire, do
not start the engine if there are leaks or
damage. Have the machine repaired by
a servicing dealer before using it.
WARNING
Never operate your power tool if it is
damaged, improperly adjusted or
maintained, or not completely or
securely assembled.
WARNING
Check that the spark plug boot is
securely mounted on the spark plug – a
loose boot may cause arcing that could
ignite combustible fumes and cause a
fire.
Keep the handles clean and dry at all
times; it is particularly important to keep
them free of moisture, pitch, oil, fuel mix,
grease or resin in order for you to
maintain a firm grip and properly control
your power tool.
For proper assembly of the bar and
chain follow the procedure described in
the chapter "Mounting the Bar and
Chain" of this instruction manual.
STIHL Oilomatic chain, guide bar and
sprocket must match each other in
gauge and pitch.
WARNING
Proper chain tension is extremely
important. In order to avoid improper
setting, the tensioning procedure must
be followed as described in your
manual. Always make sure the hex
nut(s) for the sprocket cover is (are)
tightened securely after tensioning the
chain. Check chain tension once more
after having tightened the nut(s). Never
start the pole pruner with the sprocket
cover loose.
Adjust carrying harness (if applicable)
and hand grip to suit your size before
starting work.
Starting
To reduce the risk of fire and burn
injuries, start the engine at least 10 feet
(3 m) from the fueling spot, outdoors
only.
For specific starting instructions, see the
appropriate section of your manual.
Proper starting methods reduce the risk
of injury.
Place the pole pruner on firm ground or
other solid surface in an open area or, in
the alternative, as shown in the above
picture. Maintain good balance and
secure footing.
WARNING
To reduce the risk of injury from loss of
control, do not attempt to "drop start"
your power tool. Drop starting means
pushing the machine away from the
operator, or allowing it to drop toward
the ground, while pulling on the starter
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390BA026 KN
grip. This method is very dangerous
because you may lose control of the
machine.
WARNING
To reduce the risk of injury from loss of
control be absolutely sure that the guide
bar and chain are clear of you and all
other obstructions and objects, including
the ground, because when the engine
starts at starting-throttle, engine speed
will be fast enough for the clutch to
engage the sprocket and turn the chain.
Once the engine has started,
immediately blip the throttle trigger,
which should release the starting throttle
and allow the engine to slow down to
idle.
With the engine running only at idle,
attach the power tool to the spring hook
of your harness if you are wearing one
(see appropriate chapter of this manual).
WARNING
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when
starting. Stop the engine immediately if
you are approached.
WARNING
When you pull the starter grip, do not
wrap the starter rope around your hand.
Do not let the grip snap back, but guide
the starter rope to permit the rope to
rewind. Failure to follow this procedure
may result in injury to your hand or
fingers and may damage the starter
mechanism.
Important Adjustments
WARNING
To reduce the risk of personal injury
from loss of control or contact with the
running cutting tool, do not use your unit
with incorrect idle adjustment. At correct
idle speed, the saw chain should not
move. For directions on how to adjust
idle speed, see the appropriate section
of your instruction manual.
If you cannot set the correct idle speed,
have your STIHL dealer check your
power tool and make proper
adjustments and repairs.
WARNING
This unit is equipped with an ignition
system that is normally in operational
readiness. After the setting lever is used
to stop the engine, it automatically
springs back to the "on" position. If the
engine is warm, it may be possible to
start it by simply pulling the starter rope,
with no further adjustments. To reduce
the risk of injury, be particularly alert to
keep children away from the unit.
Proper chain tension is very important at
all times. Check it at regular intervals
(during work breaks and only when the
pole pruner is shut off). If the chain
becomes loose while cutting, switch off
the engine and then tighten. Never try to
tighten the chain while the engine is
running.
During Operation
Holding and Controlling the Power Tool
Always hold the unit firmly with both
hands on the handles while you are
working. Wrap your fingers and thumbs
around the handles.
Place your left hand on the shaft and
your right hand on rear grip and throttle
trigger. Left-handers must follow these
instructions, too. Keep your hands in this
position to help maintain control of your
pole pruner while working at all times.
WARNING
Never attempt to operate your power
tool with one hand. Loss of control of the
power tool resulting in serious or fatal
injury may result.
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WARNING
In order to properly control your pole
pruner, always maintain good balance
and a firm foothold. Never work on a
ladder, in a tree or on any other insecure
support. Never hold the machine above
shoulder height. Do not overreach.
When working at a height above
13.1 feet (4.0 m) use a lift bucket.
WARNING
Special care must be taken in slippery
conditions (wet ground, snow) and in
difficult, overgrown terrain. Watch for
hidden obstacles such as tree stumps,
roots, rocks, holes and ditches to avoid
stumbling. For better footing, clear away
fallen branches, scrub and cuttings. Be
extremely cautious when working on
slopes or uneven ground.
WARNING
Take extreme care in wet and freezing
weather (rain, snow, ice). Put off the
work when the weather is windy, stormy
or rainfall is heavy.
Working Conditions
Operate and start your power tool only
outdoors in a well-ventilated area.
Operate it under good visibility and
daylight conditions only. Work carefully.
WARNING
As soon as the engine is
running, this product generates toxic exhaust
fumes containing chemicals, such as unburned
hydrocarbons (including
benzene) and carbon
monoxide, that are
known to cause respiratory problems, cancer,
birth defects, or other
reproductive harm. Some
of the gases (e. g. carbon
monoxide) may be colorless and odorless and
can cause asphyxiation
or death very quickly. To
reduce the risk of serious
or fatal injury/illness from
inhaling toxic fumes,
never run the machine
indoors or in poorly ventilated locations. If exhaust
fumes become concentrated due to insufficient
ventilation, clear obstructions from work area to
permit proper ventilation
before proceeding and/or
take frequent breaks to
allow fumes to dissipate
before they become
concentrated.
WARNING
Inhalation of certain dusts, especially
organic dusts such as mold or pollen,
can cause susceptible persons to have
an allergic or asthmatic reaction.
Substantial or repeated inhalation of
dust and other airborne contaminants, in
particular those with a smaller particle
size, may cause respiratory or other
illnesses. This includes wood dust,
especially from hardwoods, but also
from some softwoods such as Western
Red Cedar. Control dust at the source
where possible. Use good work
practices, such as always cutting with a
properly sharpened chain (which
produces wood chips rather than fine
dust) and operating the unit so that the
wind or operating process directs any
dust raised by the power tool away from
the operator. Follow the
recommendations of
EPA/OSHA/NIOSH and occupational
and trade associations with respect to
dust ("particulate matter"). When the
inhalation of dust cannot be
substantially controlled, i.e., kept at or
near the ambient (background) level, the
operator and any bystanders should
wear a respirator approved by
NIOSH/MSHA for the type of dust
encountered.
WARNING
Breathing asbestos dust is dangerous
and can cause severe or fatal injury,
respiratory illness or cancer. The use
and disposal of asbestos-containing
products have been strictly regulated by
OSHA and the Environmental Protection
Agency. If you have any reason to
believe that you might be cutting
asbestos, immediately contact your
employer or a local OSHA
representative.
8
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15m (50ft)
15m (50ft)
WARNING
This power tool has a large range. In
order to reduce the risk of personal or
even fatal injury to bystanders from
falling objects or inadvertent contact with
the moving chain of your power tool
always keep bystanders at least 50 feet
(15 m) away when the power tool is
running.
WARNING
Even though bystanders should be kept
away from the running saw chain, never
work alone. Keep within calling distance
of others in case help is needed.
Stop the engine immediately if you are
approached.
DANGER
Your power tool is not
insulated against electric
shock. To reduce the risk
of electrocution, never
operate this power tool in
the vicinity of any wires or
cables (power, etc.)
which may be carrying
electric current.
Electricity can jump from one point to
another by means of arcing. Higher
voltage increases the distance electricity
can arc. Electricity can also move
through branches, especially if they are
wet. Maintain a clearance of at least
50 feet (15 m) between the pole pruner
(including any branches it is contacting)
and any electrical line carrying live
current. Before working with less
clearance, contact your electric utility
and make sure the current is turned off.
Operating Instructions
WARNING
Do not operate your power tool using the
starting throttle lock, as you do not have
control of the engine speed.
In the event of an emergency, switch off
the engine immediately – move the slide
control / stop switch to 0 or STOP.
WARNING
To reduce the risk of cut injuries, keep
hands and feet away from the saw
chain. Never touch a moving chain with
your hand or any other part of your body.
The saw chain continues to move for a
short period after the throttle trigger is
released (inertia effect).
Accelerating the engine while the chain
is blocked increases the load and will
cause the clutch to slip continuously.
This may result in overheating and
damage to important components (e. g.
clutch, polymer housing components) –
which can then increase the risk of injury
from the chain moving while the engine
is idling.
WARNING
If the chain becomes clogged, always
turn off the engine and make sure the
chain has stopped before cleaning.
Make sure that the saw chain does not
touch any foreign materials such as
rocks, fences, nails and the like. Such
objects may be flung off and injure the
operator or bystanders, or damage the
saw chain.
HT 56 C
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246BA030 KN
WARNING
Prior to limbing, clear the working area
from interfering limbs and brush. Then,
establish an escape area away from
where the cut limbs can fall, and remove
all obstacles.
Keep work area clear – move away
fallen limbs. Place all tools and
equipment at a safe distance from the
branches being limbed, but not in the
escape area.
WARNING
Always observe the general condition of
the tree. Look for decay and rot in the
trunk and branches. If it is rotted inside,
it could snap and fall toward the operator
while being cut. Also look for broken or
dead branches which could vibrate
loose and fall on the operator. If branch
is thick or heavy, make a shallow relief
cut on the bottom of the branch before
cutting down from the top to help prevent
splitting of the branch. See chapter on
"Using the Unit".
WARNING
To reduce the risk of severe or even fatal
injury from falling objects do not cut
vertically above your body. Hold the pole
pruner at an angle of not more than 60°
from the horizontal level (see picture).
Objects may fall in unexpected
directions. Do not stand directly
underneath the limb being cut!
Watch for falling wood! As soon as the
limbed branch starts to fall, step aside
and keep a sufficient distance away from
the falling wood.
WARNING
Always pull the unit out of the cut with
the chain running to reduce the
possibility of pinching the cutting
attachment. Don't put pressure on the
pole pruner when reaching the end of a
cut. The pressure may cause the bar
and rotating chain to pop out of the cut or
kerf, go out of control and strike some
other object.
If the bar becomes pinched and caught
in the branch so that the chain can no
longer move, shut off the pole pruner
and carefully move the branch to open
the pinch and release the bar.
WARNING
If a rotating saw chain strikes a rock or
other hard object, sparks may be
created, which can ignite flammable
materials under certain circumstances.
Flammable materials can include dry
vegetation and brush, particularly when
weather conditions are hot and dry.
When there is a risk of fire or wildfire, do
not use a power tool around flammable
materials or around dry vegetation or
brush. Contact your local fire authorities
or the U.S. Forestry Service if you have
any question about whether vegetation
and weather conditions are suitable for
the use of a pole pruner.
WARNING
Never modify your muffler. Any
modification could cause an increase in
heat radiation, sparks or sound level,
thereby increasing the risk of fire, burn
injury or hearing loss. You may also
permanently damage the engine. Have
your muffler serviced and repaired by
your STIHL servicing dealer only.
WARNING
The muffler and other parts of the engine
(e.g. fins of the cylinder, spark plug)
become hot during operation and remain
hot for a while after stopping the engine.
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002BA230 KN
001BA037 KN
A
To reduce risk of burns, do not touch the
muffler and other parts while they are
hot. Keep the area around the muffler
clean. Remove excess lubricant and all
debris such as pine needles, branches
or leaves. Let the engine cool down
sitting on concrete, metal, bare ground
or solid wood (e.g. the trunk of a felled
tree) away from any combustible
substances.
WARNING
An improperly mounted or damaged
cylinder housing or a
damaged/deformed muffler shell may
interfere with the cooling process of the
muffler. To reduce the risk of fire or burn
injury, do not continue work with a
damaged or improperly mounted
cylinder housing or a
damaged/deformed muffler shell.
Your muffler is furnished with a spark
arresting screen designed to reduce the
risk of fire from the emission of hot
particles. Never operate your unit with a
missing or damaged spark arresting
screen. If your gas/oil mix ratio is correct
(i.e., not too rich), this screen will
normally stay clean as a result of the
heat from the muffler and need no
service or maintenance. If you
experience loss of performance and you
suspect a clogged screen, have your
muffler maintained by a STIHL servicing
dealer. Some state or federal laws or
regulations may require a properly
maintained spark arrestor for certain
uses. See the "Maintenance, Repair and
Storing" section of these Safety
Precautions. Remember that the risk of
a brush or forest fire is greater in hot or
dry conditions.
Reactive Forces
WARNING
Reactive forces may occur any time the
chain is rotating.The force used to cut
wood can be reversed and work against
the operator. If the rotating chain is
suddenly stopped by contact with any
solid object such as a branch or is
pinched, the reactive forces may occur
instantly. These reactive forces may
result in loss of control, which, in turn,
may cause personal injury. An
understanding of the causes of these
reactive forces may help you avoid the
element of surprise and loss of control.
Because of the design of the pole
pruner, the reactive forces experienced
when working with it are generally not as
severe as those encountered with a
chain saw. Nevertheless, you should
always maintain a proper grip and good
footing to control the power tool when
you experience such forces.
The most common reactive forces are:
–kickback,
–pushback,
–pull-in.
Kickback
Kickback may occur when the moving
saw chain near the upper quadrant of
the bar nose contacts a solid object or is
pinched.
The reaction of the cutting force of the
chain causes a rotational force on the
pole pruner in the direction opposite to
the chain movement. This may cause
the bar to move upward.
To Avoid Kickback
The best protection from kickback is to
avoid kickback situations:
1. Be aware of the location of the guide
bar nose at all times.
2. Never let the nose of the guide bar
contact any object. Do not cut limbs
with the nose of the guide bar. Be
especially careful near wire fences
and when cutting small, tough
limbs, which may easily catch the
chain.
3. Cut only one limb at a time.
A = Pull-in
Pull-in occurs when the chain on the
bottom of the bar is suddenly stopped
when it is pinched, caught or encounters
HT 56 C
11
English
001BA038 KN
B
a foreign object in the wood. The
reaction of the chain pulls the pole
pruner forward.
Pull-in frequently occurs when the chain
is not rotating at full speed before it
contacts the wood.
To Avoid Pull-in
1. Be alert to forces or situations that
may cause material to pinch the
chain at the bottom of the bar.
2. Always start a cut with the chain
rotating at full speed.
B = Pushback
Pushback occurs when the chain on the
top of the bar is suddenly stopped when
it is pinched, caught or encounters a
foreign object in the wood. The reaction
of the chain may drive the pole pruner
rapidly straight back toward the
operator. Pushback frequently occurs
when the top of the bar is used for
cutting.
To Avoid Pushback
1. Be alert to forces or situations that
may cause material to pinch the
chain at the top of the bar.
2. Do not cut more than one limb at a
time.
3. Do not twist the bar when
withdrawing it from an underbuck
cut because the chain can pinch.
MAINTENANCE, REPAIR AND
STORING
Maintenance, replacement, or repair of
the emission control devices and
systems may be performed by any
nonroad engine repair establishment or
individual. However, if you make a
warranty claim for a component which
has not been serviced or maintained
properly, STIHL may deny coverage.
WARNING
STIHL recommends the use of STIHL
replacement parts for maintenance and
repair. Use of parts manufactured by
others may be extremely dangerous and
could result in serious or fatal injury.
Strictly follow the maintenance and
repair instructions in the appropriate
sections of this instruction manual.
Please refer to the maintenance chart in
this manual.
WARNING
Always stop the engine and make sure
that the chain is stopped before doing
any maintenance or repair work or
cleaning the power tool. Do not attempt
any maintenance or repair work not
described in this instruction manual.
STIHL recommends that you have such
work performed by your STIHL servicing
dealer.
Wear gloves when handling or
performing maintenance on the cutting
attachment.
WARNING
To reduce the risk of fire and burn injury
or property damage, use only spark
plugs authorized by STIHL. Always
press spark plug boot snugly onto spark
plug terminal of the proper size. (Note: If
terminal has detachable SAE adapter
nut, it must be securely attached.) A
loose connection between spark plug
terminal and the ignition wire connector
in the boot may create arcing that could
ignite combustible fumes and cause a
fire. Keep the spark plug clean and
make sure the ignition lead is in good
condition.
WARNING
Never test the ignition system with the
ignition wire boot removed from the
spark plug or with a removed spark plug,
since uncontained sparking may cause
a fire.
WARNING
Do not operate your power tool if the
muffler is damaged, missing or modified.
An improperly maintained muffler will
increase the risk of fire and hearing loss.
Your muffler is equipped with a sparkarresting screen to reduce the risk of
fire; never operate your power tool if the
screen is missing, damaged or clogged.
12
HT 56 C
English
Remember that the risk of a brush or
forest fire is greater in hot or dry
weather.
In California, it is a violation of § 4442 or
§ 4443 of the Public Resources Code to
use or operate gasoline-powered tools
on forest-covered, brush-covered or
grass-covered land unless the engine’s
exhaust system is equipped with a
complying spark arrester that is
maintained in effective working order.
The owner/operator of this product is
responsible for properly maintaining the
spark arrester. Other states or
governmental entities/agencies, such as
the U.S. Forest Service, may have
similar requirements. Contact your local
fire agency or forest service for the laws
or regulations relating to fire protection
requirements.
WARNING
Keep the chain, bar and sprocket clean;
replace worn sprockets or chains. Keep
the chain sharp. You can spot a dull
chain when easy-to-cut wood becomes
hard to cut or burn marks appear on the
wood. Keep chain at proper tension.
Tighten all nuts, bolts and screws except
the carburetor adjustment screws after
each use.
For maintenance items please also refer
to the maintenance chart in this manual.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
Store the power tool in a dry and high or
locked location out of reach of children.
Before storing for longer than a few
days, always empty the fuel tank. See
chapter "Storing the machine" in this
manual.
Store fuel and chain oil in approved and
properly labeled safety-type canisters
only. Take care when handling gasoline!
Avoid direct contact with the skin and
avoid inhaling fuel vapor!
Using the Unit
Preparations
NWear suitable protective clothing,
observe safety precautions.
NStart the engine.
NPut on the shoulder strap.
Cutting Sequence
To allow branches to free fall, always cut
the lower branches first. Prune heavy
branches (large diameter) in several
controllable pieces.
WARNING
Never stand directly underneath the
branch you are cutting – be wary of
falling branches. Note that a branch may
spring back at you after it hits the ground
– risk of injury.
Disposal
Do not throw cuttings into the garbage
can – they can be composted.
Working Techniques
Hold the control handle with your right
hand, and the shaft with your left hand.
Your left arm should be extended to the
most comfortable position.
Always hold the shaft with your left hand
in the area of the handle hose.
HT 56 C
13
English
246BA030 KN
246BA032 KN
2
1
246BA033 KN
3
4
A
390BA024 KN
The shaft should always be held at an
angle of 60° or less.
The least tiring working position is a tool
angle of 60°.
Any lesser angle may be used to suit the
situation.
Cross-cut
Relieving cut
To avoid tearing the bark on thick
branches, always start by performing a
relieving cut (1) on the underside of the
branch.
NTo do this, apply the cutting
attachment and pull it across the
bottom of the branch in an arc as far
as the bar nose.
NPerform the cross cut (2) – position
the bar with the housing against the
branch.
Flush-cutting thick branches
If branch diameter is more than
10 cm (4 in), first
Nperform undercut (3) and then
cross-cut at a distance of about
20 cm/8 in (A) from the final cut.
Then carry out the flush-cut (4),
starting with a relieving cut and
finishing with a cross-cut.
To avoid pinching the bar in the cut,
position the cutting attachment with the
housing against the branch and then
perform the cross-cut from the top
downwards.
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HT 56 C
English
4907BA017 KN
1
4907BA008 KN
2
4907BA009 KN
4
3
6
5
4907BA010 KN
Cutting above obstacles
The machine's long reach makes it
possible to prune branches that are
overhanging obstacles, such as rivers or
lakes. The tool angle in this case
depends on the position of the branch.
Cutting from a lift bucket
Assembling the Unit
The unit features a split drive tube that
helps save space during transportation.
It unit can be easily disassembled for
transportation – see “Transporting the
Power Tool".
Connecting the Drive Tube
0000-GXX-2158-A0
WARNING
Do not mount KombiTools – only use the
drive tube with splined shaft supplied
with the machine.
NSlide the lug (2) on the front drive
tube (3) into the slot (4) in the
coupling sleeve as far as stop – if
necessary, turn the front drive
tube (3) back and forth while
pushing it home.
When correctly installed, the red line (5)
(arrow point) must be flush with the end
of the coupling sleeve.
NTighten down the wing screw (6)
firmly.
NAttach the harness to the carrying
ring.
The machine's long reach enables
cutting to be performed next to the trunk
without the risk of the lift bucket
damaging other branches. The tool
angle in this case depends on the
position of the branch.
HT 56 C
0000-GXX-2159-A0
NPull the cap (1) off the end of the
front drive tube and keep it in a safe
place for later use – see "Storing the
Machine".
NPut the powerhead on the ground so
that it rests on the machine support.
15
English
001BA248 KN
1
2
3
a
001BA244 KN
246BA021 KN
1
2
246BA022-A1
Cutting Attachment
A cutting attachment consists of the saw
chain, guide bar and chain sprocket.
The cutting attachment that comes
standard is designed to exactly match
the pole pruner.
–The pitch (t) of the saw chain (1),
chain sprocket and the nose
sprocket of the Rollomatic guide bar
must match.
–The drive link gauge (2) of the saw
chain (1) must match the groove
width of the guide bar (3).
If non-matching components are used,
the cutting attachment may be damaged
beyond repair after a short period of
operation.
Chain scabbard
Your pole pruner comes standard with a
chain scabbard that matches the cutting
attachment.
If you use guide bars of different lenghts
on the pole pruner, the length of the
chain scabbard must be matched to the
guide bar to reduce the risk of injury. It
should cover the full length of the guide
bar.
The length of the matching guide bars is
marked on the side of the chain
scabbard.
Mounting the Bar and Chain
Removing the Chain Sprocket Cover
NUnscrew the nut and remove the
chain sprocket cover.
NTurn the screw (1) clockwise until
the tensioner slide (2) butts against
the right end of the housing slot.
16
HT 56 C
English
390BA003 KN
1
246BA024 KN
Fitting the Chain
WARNING
Wear work gloves to protect your hands
from the sharp cutters.
NFit the chain – start at the bar nose.
1
5
3
4
NFit the guide bar over the screw (3)
and engage peg of tensioner slide in
the hole (4) – place the chain over
the sprocket (5) at the same time.
NTurn the tensioning screw (1)
counterclockwise until there is very
little chain sag on the underside of
the bar – and the drive link tangs are
engaged in the bar groove.
NRefit the sprocket cover and screw
on the nut fingertight.
NGo to chapter on "Tensioning the
Saw Chain".
Tensioning the Chain
246BA023 A1
Re-tensioning during cutting work:
NShut off the engine.
NLoosen the nut.
NHold the bar nose up.
NUse a screwdriver to turn the
tensioning screw (1)
counterclockwise until the chain fits
snugly against the underside of the
bar.
NWhile still holding the bar nose up,
tighten down the nut firmly.
NGo to "Checking Chain Tension".
A new chain has to be re-tensioned
more often than one that has been in
use for some time.
NCheck chain tension frequently –
see chapter on "Operating
Instructions".
HT 56 C
17
English
246BA025 KN
Checking Chain Tension
NShut off the engine.
NWear work gloves to protect your
hands.
NThe chain must fit snugly against
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand.
NIf necessary, re-tension the chain.
A new chain has to be re-tensioned
more often than one that has been in
use for some time.
NCheck chain tension frequently –
see chapter on "Operating
Instructions".
Fuel
This engine is certified to operate on
unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of highquality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 ((R+M)/2)
and no more than 10% ethanol content.
NOTICE
Fuel with an octane rating below 89 may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or damage the
engine. For this reason STIHL
recommends that you use only quality
unleaded gasoline!
NOTICE
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
and should not be used.
For further details, see
www.STIHLusa.com/ethanol
The ethanol content in gasoline affects
engine speed – it may be necessary to
readjust the carburetor if you use fuels
with various ethanol contents.
WARNING
To reduce the risk of personal injury
from loss of control and/or contact with
the running cutting tool, do not use your
unit with an incorrect idle adjustment. At
correct idle speed, the cutting tool
should not move.
If your machine’s idle speed is
incorrectly adjusted, have your
authorized STIHL servicing dealer
check your machine and make the
proper adjustments and repairs.
The idle speed and maximum speed of
the engine change if you switch from a
fuel with a certain ethanol content to a
fuel with a much higher or lower ethanol
content.
This problem can be avoided by always
using fuel with the same ethanol
content.
To ensure the maximum performance of
your STIHL engine, use a high quality 2cycle engine oil. To help your engine run
cleaner and reduce harmful carbon
deposits, STIHL recommends using
STIHL HP Ultra 2-cycle engine oil or ask
your dealer for an equivalent fully
synthetic 2-cycle engine oil.
To meet the requirements of EPA and
CARB we recommend to use STIHL HP
Ultra oil.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. STIHL MotoMix has a high
octane rating and ensures that you
always use the right gasoline/oil mix
ratio.
18
HT 56 C
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547BA045 KN
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil suited for high
performance engines.
For further details, see
www.STIHLusa.com/ethanol
If not using MotoMix, use only STIHL
two-stroke engine oil or equivalent highquality two-stroke engine oils that are
designed for use in air cooled two-cycle
engines.
The use of non-seasonal gasoline
blends may increase the potential for
pressure to build in the fuel tank during
operation. For example, using a winder
blend during the summer will increase
pressure in the fuel tank. Always use
gasoline blends appropriate to the
season, altitude and other
environmental factors.
Do not use BIA or TCW rated (twostroke water cooled) mix oils or other
mix oils that state they are for use in both
water cooled and air cooled engines
(e.g., outboard motors, snowmobiles,
chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapor. When filling at
the pump, first remove the container
from your vehicle and place the
container on the ground before filling. To
reduce the risk of sparks from static
discharge and resulting fire and/or
explosion, do not fill fuel containers that
are sitting in or on a vehicle or trailer.
The container should be kept tightly
closed in order to limit the amount of
moisture that gets into the mixture.
The machine‘s fuel tank should be
cleaned as necessary.
Fuel mix ages
If not using MotoMix, only mix sufficient
fuel for a few days of work, not to exceed
30 days of storage. Store in approved
fuel-containers only. When mixing, pour
oil into the container first, and then add
gasoline. Close the container and shake
it vigorously by hand to ensure proper
mix of oil and gasoline.
Gasoline
Oil (STIHL 50:1 or equivalent high-quality oils)
US gal.US fl.oz.
12.6
2 1/26.4
512.8
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Fueling
Preparations
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Always thoroughly shake the mixture in
the canister before fueling your
machine.
NPosition the machine so that the
filler cap is facing up.
WARNING
To reduce the risk of fire and personal
injuries due to escaping fuel and vapor,
remove the fuel filler cap carefully so
that any excess pressure in the tank can
escape slowly. Use the proper seasonal
gasoline blend, i.e., winter blend in
winter, summer blend in summer.
HT 56 C
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English
002BA447 KN
002BA448 KN
246BA026 KN
Opening the threaded filler cap
NTurn the cap counterclockwise until
it can be removed from the tank
opening.
NRemove the filler cap.
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank.
Closing the threaded filler cap
NPosition cap.
NTurn the cap clockwise as far as it
will go and tighten it as securely as
possible by hand.
Chain LubricantFilling Chain Oil Tank
For automatic and reliable lubrication of
the chain and guide bar – use only an
environmentally compatible quality
chain and bar lubricant. Rapidly
biodegradable STIHL BioPlus is
recommended.
NOTICE
Biological chain oil must be resistant to
aging (e.g. STIHL BioPlus), since it will
otherwise quickly turn to resin. This
results in hard deposits that are difficult
to remove, especially in the area of the
chain drive and chain. It may even cause
the oil pump to seize.
The service life of the chain and guide
bar depends on the quality of the
lubricant. It is therefore essential to use
only a specially formulated chain
lubricant.
WARNING
Do not use waste oil. Renewed contact
with waste oil can cause skin cancer.
Moreover, waste oil is environmentally
harmful.
NOTICE
Waste oil does not have the necessary
lubricating properties and is unsuitable
for chain lubrication.
NOTICE
A full chain oil tank is sufficient for only
half a tankful of fuel. Check the oil level
regularly during cutting work. Never
allow the oil tank to run dry.
Preparations
NThoroughly clean the tank cap and
the area around it to ensure that no
dirt falls into the tank.
NPosition the machine so that the
tank cap faces up.
20
HT 56 C
Opening
002BA575 KN
0000-GXX-0136-A0
0000-GXX-0137-A0 KN
0000-GXX-0138-A0 KN
0000-GXX-0137-A0 KN
0000-GXX-0139-A0 KN
0000-GXX-0140-A0 KN
0000-GXX-0141-A0 KN
English
NRaise the grip until it is upright.
NTurn the cap counterclockwise
(about a quarter turn).
Marks on tank cap and oil tank must line
up.
NRemove the tank cap.
Filling the Chain Oil Tank
NFill the tank with chain oil.
Take care not to spill chain oil while
refilling and do not overfill the tank.
Closing
Grip must be vertical:
NFit the cap – marks on tank cap and
oil tank must line up.
NPress the cap down as far as stop.
NWhile holding the cap depressed,
turn it clockwise until it engages in
position.
The marks on the cap and oil tank are
then in alignment.
NFold the grip down.
HT 56 C
21
English
0000-GX-0142 A0 KN
002BA584 KN
1
0000-GXX-0136-A0
246BA027 KN
Checking Chain Lubrication
Tank cap is locked.
If the oil level in the tank does not go
down, the reason may be a problem in
the oil supply system: Check chain
lubrication, clean the oilways, contact
your dealer for assistance if necessary.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
If the tank cap cannot be locked in the oil
tank opening
Bottom of cap is twisted in relation to
top.
NRemove the cap from the oil tank
and check it from above.
Left:Bottom of cap is twisted –
inner mark (1) in line with
outer mark.
Right:Bottom of cap in correct posi-
tion – inner mark is under the
grip. It is not in line with the
outer mark.
NPlace the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
NContinue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
NTurn the cap clockwise and lock it in
position – see section on "Closing".
The saw chain must always throw off a
small amount of oil.
NOTICE
Never operate your machine without
chain lubrication. If the chain runs dry,
the whole cutting attachment will be
irretrievably damaged within a very short
time. Always check chain lubrication and
the oil level in the tank before starting
work.
Every new chain has to be broken in for
about 2 to 3 minutes.
After breaking in the chain, check chain
tension and adjust if necessary – see
"Checking Chain Tension".
22
HT 56 C
English
2
4907BA000 KN
1
3
1
2
4907BA001 KN
4
547BA015 KN
5
547BA016 KN
Fitting the Harness
The type and style of the shoulder strap
depend on the market.
Shoulder strap
NPut on the shoulder strap (1).
NAdjust the length of the strap.
NWith the power tool attached, the
carabiner (2) must be at about the
same height as your right hip.
Starting / Stopping the
Engine
Versions with Easy2Start
WARNING
This machine is extremely simple and
easy to start, even for children.
To reduce the risk of serious or fatal
injury:
–do not allow children or other
unauthorized persons to attempt to
start or otherwise use the machine
–never allow children or
unauthorized persons access to the
machine
–never leave the machine
unattended while working or during
work breaks
–after work, store in a safe, secure
location out of the reach of children
and other unauthorized persons
Controls
3Stop switch with Run and 0 =Stop
positions.
Function of stop switch and ignition
system
The stop switch is normally in the Run
position, i.e. when it is not depressed:
The ignition is switched on – the engine
is ready to start. If the stop switch is
moved to the 0 position, the ignition is
switched off. The ignition is switched on
again automatically after the engine
stops.
Starting the Engine
NPress the manual fuel pump
bulb (4) at least five times – even if
the bulb is filled with fuel.
HT 56 C
Cold engine (cold start)
1Throttle trigger lockout
2Throttle trigger
NPress in the choke knob (5) and turn
it to g at the same time.
23
English
5
547BA017 KN
246BA034 KN
547BA021 KN
Warm engine (warm start)
NPress in the choke knob (5) and turn
it to < at the same time.
Also use this setting if the engine has
been running but is still cold.
Cranking
NRemove the chain guard.
NPlace the machine on the ground: It
must rest securely on the engine
support and the hook. If necessary,
rest the hook on a raised support
(e.g. a branch, mound or something
similar). Check that the chain is not
touching any object or the ground.
WARNING
Check that nobody is standing within the
working range of the pruner.
NMake sure you have a safe and
secure footing.
NHold the unit firmly on the ground
with your left hand and press down
– do not touch the throttle trigger or
throttle trigger lockout.
NOTICE
Do not stand or kneel on the shaft.
NHold the starter grip with your right
hand.
NPull the starter grip steadily.
NOTICE
Do not pull out the starter rope all the
way – it might otherwise break.
NDo not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
NContinue cranking until the engine
runs.
As soon as the engine runs
NPress down the throttle trigger
lockout and open the throttle – the
choke knob moves to the run
position F. After a cold start, warm
up the engine by opening the
throttle several times.
WARNING
Make sure the carburetor is correctly
adjusted. The saw chain must not move
when the engine is idling.
Your machine is now ready for
operation.
Stopping the Engine
NMove the stop switch in the direction
of 0 – the engine stops – release
the stop switch – it springs back to
the run position.
Other Hints on Starting
Engine stalls in cold start position g or
under acceleration.
NMove the choke knob to < and
continue cranking until the engine
runs.
Engine does not start in warm start
position <
NMove the choke knob to g and
continue cranking until the engine
runs.
If the engine does not start
NCheck that all settings are correct.
NCheck that there is fuel in the tank
and refuel if necessary.
NCheck that the spark plug boot is
properly connected.
NRepeat the starting procedure.
24
HT 56 C
English
4907BA017 KN
1
4907BA005 KN
3
2
4
4907BA011 KN
5
4907BA006 KN
6
2
Fuel tank run until completely dry
NAfter refueling, press the manual
fuel pump bulb at least five times –
even if the bulb is already filled with
fuel.
NSet the choke knob to suit the
engine temperature.
NNow start the engine.
Transporting the Unit
The unit features a split drive tube that
helps save space during transportation.
Disconnecting the Drive Tube
NDisconnect the shoulder strap from
the carrying ring.
NPlace the unit on the ground:
NFit the cap (4) on the end of the
drive tube.
NOTICE
Make sure the ends of the drive tube are
clean.
Connecting the Drive Tube
NPull the cap off the drive tube and
keep it in a safe place.
NPut the powerhead on the ground so
that it rests on the machine support.
NExamine ends of drive tube for dirt
and clean if necessary.
HT 56 C
NLoosen the star knob (1) – do not
remove it.
NPull the drive tube (2) out of the
coupling sleeve (3).
NSlide the lug (5) on the front drive
tube (2) into the slot (6) in the
coupling sleeve as far as stop – if
necessary, turn the front drive
tube (2) back and forth while
pushing it home.
25
English
7
4907BA007 KN
1
When correctly installed, the red line (7)
(arrow point) must be flush with the end
of the coupling sleeve.
NTighten down the star knob (1)
firmly.
NAttach the harness to the carrying
ring.
Operating Instructions
During Break-In Period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
NOTICE
Do not make the mixture leaner to
achieve an apparent increase in power –
this could damage the engine – see
"Adjusting the Carburetor".
Check chain tension frequently
A new chain has to be retensioned more
often than one that has been in use for
some time.
Chain cold
Tension is correct when the chain fits
snugly against the underside of the bar
and can still be pulled along the bar by
hand. Retension if necessary – see
"Tensioning the Saw Chain".
Chain at operating temperature
The chain stretches and begins to sag.
The drive links must not come out of the
bar groove – the chain may otherwise
jump off the bar. Retension the chain –
see "Tensioning the Saw Chain".
After long period of full-throttle operation
Allow engine to run for a short while at
idle speed so that engine heat can be
dissipated by the flow of cooling air. This
protects engine-mounted components
(ignition, carburetor) from thermal
overload.
After Finishing Work
NSlacken off the chain if you have
retensioned it at operating
temperature during cutting work.
NOTICE
Always slacken off the chain after
finishing work. The chain contracts as it
cools down. If it is not slackened off, it
can damage the gear shaft and
bearings.
Storing your saw for a short period
Wait for the engine to cool down. Drain
the fuel tank. Store the machine in a dry
location. Check the tightness of all
accessible screws and nuts (not
adjusting screws) at regular intervals
and retighten if necessary.
Storing for a long period
See chapter on "Storing the Machine"
26
HT 56 C
English
1
2
3
246BA028 KN
1
547BA022 KN
2
3
Taking Care of the Guide Bar
NTurn the bar over every time you
sharpen the chain and every time
you replace the chain – this helps
avoid one-sided wear, especially at
the nose and underside of the bar.
NRegularly clean the oil inlet hole (1),
the oilway (2) and the bar
groove (3).
NMeasure the groove depth – with the
scale on the filing gauge (special
accessory) – in the area used most
for cutting.
The drive link tangs will otherwise
scrape along the bottom of the groove –
the cutters and tie straps will not ride on
the bar rails.
Cleaning the Air Filter
If there is a noticeable loss of engine
power
NMove the choke lever (1) to <.
NTurn the screw (2) in the filter
cover (3) counterclockwise until the
cover is loose.
NEase the filter cover (3) over the
choke lever and lift it away.
NClean away loose dirt from around
the filter.
Chain type Chain pitch Minimum
groove depth
Picco1/4" P4.0 mm
(0.16 in)
If groove depth is less than specified:
NReplace the guide bar.
HT 56 C
27
English
547BA023 KN
4
0815BA006 KN
Engine ManagementAdjusting the Carburetor
NReach into the recess (4) in the filter
housing and take out the felt
filter (5).
NFit a new felt filter element (5). As a
temporary measure you can knock it
out on the palm of your hand or blow
it out with compressed air. Do not
wash.
NOTICE
Replace damaged parts.
NFit the felt filter (5) in the filter
housing, make sure it is properly
seated – the arrow points to the
recess.
NMove the choke lever (1) to <.
NFit the filter cover in position,
making sure the screw is square.
Tighten down the screw.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
The carburetor comes from the factory
with a standard setting.
On this machine it is no longer
necessary to adjust the carburetor.
It has been set at the factory to provide
an optimum fuel-air mixture in all
locations and operating conditions.
Adjusting Idle Speed
Engine stops while idling
NWarm up the engine for about
3 minutes.
NTurn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the saw chain must
not rotate.
Chain rotates when engine is idling
NTurn the idle speed screw (LA)
counterclockwise until the chain
stops running and then turn the
screw another 1/2 to 3/4 turn in the
same direction.
28
HT 56 C
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