HT 56 C
{
STIHL HT 56 C
Warning!
Read and follow all safety
precautions in Instruction Manual –
improper use can cause serious or
fatal injury.
Advertencia!
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
Instruction Manual
1 - 47
Manual de
instrucciones
49 - 101
Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2011
0458-555-8621-A. M2.F11.PM.
0000002629_004_GB
HT 56 C
English
1
{
Contents
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.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 3
Using the Unit 14
Assembling the Unit 16
Cutting Attachment 17
Mounting the Bar and Chain 17
Tensioning the Chain 18
Checking Chain Tension 18
Fuel 19
Fueling 20
Chain Lubricant 22
Filling Chain Oil Tank 22
Checking Chain Lubrication 23
Fitting the Harness 23
Starting / Stopping the Engine 24
Transporting the Unit 25
Operating Instructions 26
Taking Care of the Guide Bar 27
Cleaning the Air Filter 28
Adjusting the Carburetor 28
Spark Plug 29
Rewind Starter 31
Storing the Machine 31
Checking and Replacing the Chain
Sprocket 31
Maintaining and Sharpening the
Saw Chain 32
Inspections and Maintenance by
Dealer 36
Maintenance and Care 37
Main Parts 39
Specifications 41
Special Accessories 42
Maintenance and Repairs 42
STIHL Incorporated Federal
Emission Control Warranty
Statement 42
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 44
Trademarks 46
Warning!
Because a pole pruner is a high-speed,
fast-cutting power tool with a very long
reach, special safety precautions must
be observed to reduce the risk of per-
sonal injury. Careless or improper use
may cause serious or even fatal injury.
HT 56 C
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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.
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:
N A bullet marks a step or procedure.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
N Loosen the screw (1).
N Lever (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:
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
described in this manual, please contact
your STIHL dealer for assistance.
Guide to Using this Manual
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
Danger!
Indicates an imminent risk of severe or
fatal injury.
Warning!
Indicates a hazardous situation which, if
not avoided, could result in severe or
fatal injury.
Caution!
Indicates a risk of property damage,
including damage to the machine or its
individual components.
HT 56 C
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Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable local safety regulations,
standards and ordinances.
Do not cut any material other than wood
or wooden objects. Use your pole pruner
for limbing only.
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.
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
exposure to vibration are mentioned as
factors in the development of whitefinger
Safety Precautions and
Working Techniques
Because a pole pruner is
a high-speed, fast-cut-
ting power tool with a
very long 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.
Warning!
Do not lend or rent your power tool with-
out the instruction manual. Be sure that
anyone using it understands the infor-
mation contained in this manual.
Warning!
The use of this machine may be hazard-
ous. 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 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 bystand-
ers 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 unauthor-
ized persons do not use it.
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 dis-
ease (Raynaud's phenomenon) or
carpal tunnel syndrome.
HT 56 C
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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.
Proper Clothing
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.
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.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts".
Warning!
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may inter-
fere with some pacemakers. To reduce
the risk of serious or fatal injury, persons
with a pacemaker should consult their
physician and the pacemaker manufac-
turer before operating this tool.
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 protec-
tive glasses with
adequate top and side protection com-
plying with ANSI Z 87.1 (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.
Always wear gloves
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.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
with cut retardant inserts
are recommended.
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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. Accidental
acceleration of the engine can cause the
chain to rotate and cause serious
injuries.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
Fueling Instructions
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.
Different models may be equipped with
different fuel caps.
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 unauthor-
ized attachments are useable with
STIHL power tools, their use may, in
fact, be extremely dangerous.
390BA000 KN
Warning!
Always switch off the engine and fit the
scabbard over the cutting attachment
before transporting the power tool over
long distances. When transporting it in a
vehicle, properly secure it to prevent
turnover, fuel spillage and damage to
the unit.
Warning!
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and seri-
ous 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.
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 refu-
eling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
Warning!
Check for fuel leakage
while refueling and dur-
ing operation. If fuel
leakage is found, do not
start or run the engine
until the leak is fixed and
any spilled fuel has been wiped away.
Take care not to get fuel on your cloth-
ing. If this happens, change your
clothing immediately.
HT 56 C
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Toolless cap with grip
To do this with this STIHL cap, raise the
grip on the top of the cap until it is upright
at a 90° angle. Insert the cap in the fuel
tank opening with the raised positioning
marks on the grip of the cap and on the
fuel tank opening lining up. Using the
grip, press the cap down firmly while
turning it clockwise as far as it will go
(approx. 1/4 turn).
Misaligned, damaged or broken cap
N If the cap does not drop fully into the
opening when the positioning marks
line up and/or if the cap does not
tighten properly when twisted, the
base of the cap may be prematurely
rotated (vis-à-vis the top) to the
closed position. Such misalignment
can result from handling, cleaning
or an improper attempt at
tightening.
N To return the cap to the open
position for installation, turn the cap
(with the grip up) until it drops fully
into the tank opening. Next, twist the
cap counterclockwise as far as it will
go (approx. 1/4 turn) – this will twist
the base of the cap into the correct
position. Then, twist the cap
clockwise, closing it normally.
N If your cap still does not tighten
properly, it may be damaged or
broken; immediately stop use of the
unit and take it to your authorized
STIHL dealer for repair.
Screw Cap
See also the "Fueling" chapter in your
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!
In order to reduce the risk of fuel spill-
age and fire from an improperly
tightened fuel cap, correctly position
and tighten the fuel cap in the fuel tank
opening.
Fold the grip flush with
the top of the cap. Grip
the cap and check for
tightness. If the grip does
not lie completely flush
with the cap and the
detent on the grip does
not fit in the correspond-
ing recess in the filler
opening, or if the cap is
loose in the filler opening,
the cap is not properly
seated and tightened and
you must repeat the
above steps.
001BA220 KN
Left: Base of cap in closed posi-
tion (with open space)
Right: Base of cap correctly posi-
tioned for installation
001BA227 KN
001BA226 KN
Warning!
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill quanti-
ties of fuel. In order to
reduce the risk of fuel
spillage and fire, tighten the fuel filler
cap by hand as securely as possible.
Warning!
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout, momentary stop switch
and cutting attachment. The throttle trig-
ger must move freely and always spring
back to the idle position. Never attempt
to modify the controls or safety devices.
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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 your instruction manual.
STIHL Oilomatic chain, guide bar and
sprocket must match each other in
gauge and pitch.
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.
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!
Never operate your power tool if it is
damaged, improperly adjusted or main-
tained, 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.
Warning!
Proper chain tension is extremely
important. In order to avoid improper
setting, the tensioning procedure must
be followed as described in your man-
ual. 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.
Warning!
To reduce the risk of injury from loss of
control, do not attempt to "drop start"
your power tool.
275BA007 KN
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, includ-
ing 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.
Warning!
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when start-
ing. 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 rewind it properly.
Failure to follow this procedure may
result in injury to your hand or fingers
and may damage the starter
mechanism.
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Important Adjustments
If you cannot set the correct idle speed,
have your STIHL dealer check your
power tool and make proper
adjustments and repairs.
Proper chain tension is very important at
all times. Check it at regular intervals
(whenever 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 should follow these
instructions, too. Keep your hands in this
position to have your pole pruner under
control at all times.
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!
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.
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.
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.
390BA026 KN
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.
HT 56 C
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Stop the engine immediately if you are
approached.
Warning!
As soon as the engine is
running, this product gen-
erates toxic exhaust
fumes containing chemi-
cals, such as unburned
hydrocarbons (including
benzene) and carbon monoxide, that
are known to cause respiratory prob-
lems, cancer, birth defects, or other
reproductive harm. Some of the gases
(e. g. carbon monoxide) may be color-
less and odorless. To reduce the risk of
serious or fatal injury/illness from inhal-
ing 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. Sub-
stantial or repeated inhalation of dust
and other airborne contaminants, in par-
ticular those with a smaller particle size,
may cause respiratory or other ill-
nesses. 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 prac-
tices, such as 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 recommenda-
tions of EPA/OSHA/NIOSH and
occupational and trade associations
with respect to dust ("particulate mat-
ter"). 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 Protec-
tion Agency. If you have any reason to
believe that you might be cutting asbes-
tos, immediately contact your employer
or a local OSHA representative.
Warning!
This power tool has a large range. In
order to reduce the risk of personal or
even fatal injury to bystanders from fall-
ing 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.
HT 56 C
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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
In the event of an emergency, switch off
the engine immediately – move the slide
control / momentary stop switch to 0 or
STOP.
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.
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.
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.
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 car-
rying electric current.
15m (50ft)
15m (50ft)
Warning!
Do not operate your power tool using
the starting throttle lock, as you do not
have control of the engine speed.
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).
Warning!
If the chain becomes clogged, always
turn off the engine and make sure the
chain has stopped before cleaning.
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.
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 opera-
tor 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 pre-
vent splitting of the branch.
HT 56 C
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11
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.
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.
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
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 pic-
ture). Objects may fall in unexpected
directions. Do not stand directly under-
neath the limb being cut!
275BA005 KN
Warning!
Always pull the unit out of the cut with
the chain running to reduce the possibil-
ity 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 rotat-
ing chain to pop out of the cut or kerf, go
out of control and strike some other
object.
Warning!
Never modify your muffler. Any modifi-
cation 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. 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 cyl-
inder housing or a damaged/deformed
muffler shell may interfere with the cool-
ing 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 dam-
aged/deformed muffler shell.
HT 56 C
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12
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
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
chain saw 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
a foreign object in the wood. The
reaction of the chain pulls the saw
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.
Warning!
Some STIHL power tools
are equipped with a cata-
lytic converter, which is
designed to reduce the
exhaust emissions of the
engine by a chemical
process in the muffler. Due to this proc-
ess, the muffler does not cool down as
rapidly as conventional mufflers when
the engine returns to idle or is shut off.
To reduce the risk of fire and burn inju-
ries when using a catalytic converter,
always set your power tool down in the
upright position and never locate it
where the muffler is near dry brush,
grass, wood chips or other combustible
materials while it is still hot.
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 sud-
denly 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.
002BA230 KN
001BA037 KN
A
HT 56 C
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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 saw 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 or if
nonapproved replacement parts were
used, STIHL may deny coverage.
Strictly follow the maintenance and
repair instructions in the appropriate
sections of your instruction manual.
Please refer to the maintenance chart in
this manual.
Wear gloves when handling or
performing maintenance on the cutting
attachment.
In California, it is a violation of § 4442 or
§ 4443 or 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
001BA038 KN
B
Warning!
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may cause serious or
fatal injury.
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 your instruction manual.
Have such work performed by your
STIHL servicing dealer only.
Warning!
Use the specified spark plug and make
sure it and the ignition lead are always
clean and in good condition. 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.
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 modi-
fied. An improperly maintained muffler
will increase the risk of fire and hearing
loss. Your muffler is equipped with a
spark-arresting screen to reduce the
risk of fire; never operate your power
tool if the screen is missing, damaged or
clogged. Remember that the risk of a
brush or forest fire is greater in hot or dry
weather.
HT 56 C
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14
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.
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!
Preparations
N Wear suitable protective clothing,
observe safety precautions.
N Starting the engine
N Put on the shoulder strap.
Cutting Sequence
To allow branches a free fall, always cut
the lower branches first. Prune heavy
branches (large diameter) in several
controllable pieces.
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.
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 concerned.
Cross-cut
To avoid pinching the bar in the cut,
position the cutting attachment with the
hook against the branch and then
perform the cross-cut from the top
downwards.
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.
Using the Unit
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.
275BA002 KN
390BA052 KN
HT 56 C
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Relieving cut
To avoid tearing the bark on thick
branches, always start by performing a
relieving cut (1) on the underside of the
branch.
N To do this, apply the cutting
attachment and pull it across the
bottom of the branch in an arc as far
as the bar nose.
N Then position the bar with the hook
against the branch and perform the
cross-cut (2).
Flush-cutting thick branches
If branch diameter is more than
4in(10cm), first
N perform an initial cut (3), with
relieving cut and cross-cut at
distance (A) of about 8 in (20 cm)
from the final cut, then carry out the
flush-cut (4), starting with a relieving
cut and finishing with a cross-cut.
Cutting above obstacles
The unit'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
The unit'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.
2
1
390BA041 KN
3
4
A
390BA024 KN
275BA003 KN
275BA008 KN
HT 56 C
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30° angle drive (special accessory)
The angle drive keeps the cutting
attachment at an angle of 30° to the
drive tube.
The angle drive may be adjusted on the
drive tube to the following positions only:
1 For cross-cutting vertical branches
and bushes.
2 For a better view of the cutting
attachment.
The unit features a split drive tube that
helps save space during transportation.
It unit can be easily disassembled for
transportation – see "Transporting the
Unit".
Connecting the Drive Tube
N Pull 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".
N Put the powerhead on the ground so
that it rests on the machine support.
N Slide 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.
N Tighten down the star knob (6)
firmly.
N Attach the shoulder strap to the
carrying ring.
1
2
390BA053 KN
Assembling the Unit
Do not mount KombiTools – only
use the drive tube with splined
shaft supplied with the machine.
4907BA004 KN
1
4907BA008 KN
2
4907BA009 KN
4
3
6
5
4907BA010 KN
HT 56 C
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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.
Removing the chain sprocket cover
N Unscrew the nut and remove the
cover.
N Turn the screw (1)
counterclockwise until the tensioner
slide (2) butts against the left end of
the housing slot, then back it off 5
full turns.
Fitting the chain
N Fit the chain – start at the bar nose.
Cutting Attachment
001BA191 KN
1
2
3
a
t = a : 2
Mounting the Bar and
Chain
390BA042 KN
1
2
390BA043 KN
Wear work gloves to protect your
hands from the sharp cutters.
390BA003 KN
HT 56 C
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18
N Fit 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.
N Turn the tensioning screw (1)
clockwise until there is very little
chain sag on the underside of the
bar – and the drive link tangs are
engaged in the bar groove.
N Refit the cover and screw on the nut
fingertight.
N Go to chapter on "Tensioning the
Saw Chain"
Retensioning during cutting work:
N Stopping the engine
N Loosen the nut.
N Hold the bar nose up.
N Use a screwdriver to turn the
tensioning screw (1) clockwise until
the chain fits snugly against the
underside of the bar.
N While still holding the bar nose up,
tighten down the nut firmly.
N Go to "Checking Chain Tension".
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
N Shut off the engine
N Wear work gloves to protect your
hands.
N The 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.
N If necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
N Check chain tension frequently –
see chapter on "Operating
Instructions".
1
5
390BA044 KN
4
3
Tensioning the Chain
1
390BA045 KN
Checking Chain Tension
390BA046 KN
HT 56 C
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This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality 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.
Fuel with a lower octane rating 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 even
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
The ethanol content in gasoline affects
engine running speed – it may be
necessary to readjust the carburetor if
you use fuels with various ethanol
contents.
The idle speed and maximum speed of
the engine change if you switch from a
fuel with a certain ethanol content to
another fuel with a much higher or lower
ethanol content.
This problem can be avoided by always
using fuel with the same ethanol
content.
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke
engine oils that are designed for use
only in air cooled two-cycle engines.
We recommend STIHL HP Ultra 2-Cycle
Engine Oil since it is specially
formulated for use in STIHL engines.
Do not use BIA or TCW rated (two-
stroke 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.).
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
Only mix sufficient fuel for a few days
work, not to exceed 3 months 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 mixing of the oil
with the fuel.
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Fuel
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 incorrect idle adjustment. At
correct idle speed, the cutting tool
should not move.
If your power tool shows an incorrect
idle adjustment, have your STIHL dealer
check your power tool and make proper
adjustments and repairs.
Gaso-
line
Oil (STIHL 50:1 or equiva-
lent high-quality oils)
US gal. US fl.oz.
12.6
2 1/2 6.4
5 12.8
HT 56 C
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20
Preparations
N Before 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.
N Position the machine so that the
filler cap is facing up.
Opening
N Raise the grip into an upright
position.
N Turn the cap counterclockwise
(approx. 1/4 turn).
N Remove fuel filler cap.
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank.
Closing
With grip in an upright position:
N Insert the cap – positioning marks
on the cap and the fuel tank opening
must line up.
N The cap should drop fully into the
opening in this position.
N While pressing the cap down, twist it
firmly clockwise as far as it will go
(approx. 1/4 turn).
Fueling
547BA009 KN
In order to reduce the risk of burns
or other personal injury from
escaping gas vapor and fumes,
remove the fuel filler cap carefully
so as to allow any pressure build-
up in the tank to release slowly
001BA218 KN
001BA219 KN
001BA224 KN
001BA220 KN
001BA221 KN
HT 56 C
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21
N Fold down the grip.
Checking for proper closure
N The lug on the grip must engage
entirely in the recess (arrow), and
the grip must lie completely flush
with the top of the cap.
N Grip the cap and check for
tightness.
N If the cap can be moved, it is not
properly installed.
Misalignment of the cap parts
N If the cap does not drop fully into the
opening when the positioning marks
line up and/or if the cap does not
tighten properly when twisted, the
base of the cap may be rotated out
of position vis-à-vis the top.
N Such misalignment can result from
handling, cleaning or an improper
attempt at tightening.
N To correct a misalignment, turn the
cap (with the grip up) until it drops
fully into the tank opening.
N Twist the cap counterclockwise as
far as it will go (approx. 1/4 turn) –
this will twist the base of the cap into
the correct position.
N Twist the cap clockwise, closing it
normally – see the sections
"Closing" and "Checking for proper
closure."
N If your cap still does not tighten
properly, it may be damaged or
broken; immediately stop use of the
unit and take it to your authorized
STIHL dealer for repair.
001BA222 KN
001BA223 KN
001BA225 KN
Left: Base of improperly aligned
cap (with open space)
Right: Base of cap correctly posi-
tioned for installation
001BA227 KN
001BA226 KN
HT 56 C
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22
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.
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.
Preparations
N Thoroughly clean the oil filler cap
and the area around it to ensure that
no dirt falls into the tank.
N Position the machine so that the
filler cap is facing up.
Opening the filler cap
The bayonet-type oil tank filler cap with
hinged grip can be opened and closed
without tools.
N To open the tank, swing the grip to
the vertical position.
N Turn the filler cap counterclockwise
as far as stop and remove.
Filling up with chain oil
N Filling up with chain oil
Take care not to spill chain oil while
refilling and do not overfill the tank.
Chain Lubricant
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.
Do not use waste oil. Renewed
contact with waste oil can cause
skin cancer. Moreover, waste oil is
environmentally harmful.
Waste oil does not have the
necessary lubricating properties
and is unsuitable for chain
lubrication.
Filling Chain Oil Tank
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.
390BA047 KN
402BA036 KN
HT 56 C
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23
Closing the filler cap
N To close the oil tank, place the filler
cap in position with the grip upright,
making sure the recesses are in
alignment.
N Turn the filler cap clockwise as far
as stop.
N Fold the grip down so that it is flush
with the top of the cap.
If the oil level in the tank does not go
down, the reason may be a fault 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.
The saw chain must always throw off a
small amount of oil.
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".
The type and style of the shoulder strap
depend on the market.
Shoulder strap
N Put on the shoulder strap (1).
N Adjust the length of the strap.
N With the power tool attached, the
carabiner (2) must be at about the
same height as your right hip.
402BA037 KN
Checking Chain
Lubrication
Never operate your saw 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.
390BA048 KN
Fitting the Harness
2
4907BA000 KN
1
HT 56 C
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24
Controls
1 Throttle trigger lockout
2 Throttle trigger
3 Stop switch with Run and 0 =Stop
positions.
Function of stop switch and ignition
system
The stop switch is normally in the Run
position: Ignition is on in this position –
the engine is ready to start and may be
started. If the stop switch is moved to
the 0 position, the ignition is switched
off. It is automatically switched on again
after the engine comes to a standstill.
Starting the engine
N Press the fuel pump bulb (4) at least
five times – even if the bulb is
already filled with fuel.
Cold engine (cold start)
N Press in the choke lever (5) and turn
it to g at the same time.
Warm engine (warm start)
N Press in the choke lever (5) and turn
it to < at the same time.
Also use this setting if the engine has
been running but is still cold.
Cranking
N Remove the chain guard.
N Place the unit 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.
N Make sure you have a firm footing.
N Hold the unit firmly on the ground
with your left hand and press down
– do not touch the throttle trigger or
throttle trigger lockout.
N Hold the starter grip with your right
hand.
N Pull the starter grip steadily.
Starting / Stopping the
Engine
3
1
2
4907BA001 KN
4
547BA015 KN
5
547BA016 KN
5
547BA017 KN
Check that nobody is standing
within the working range of the
pruner.
Do not stand or kneel on the drive
tube.
Do not pull out the starter rope all
the way – it might otherwise
break.
275BA007 KN
HT 56 C
English
25
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N Continue cranking until the engine
runs.
As soon as the engine runs
N Press down the throttle trigger
lockout and open the throttle – the
choke lever moves to the run
position F . After a cold start, warm
up the engine by opening the
throttle several times.
Your machine is now ready for
operation.
Shut off the engine
N Move 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
N Move the choke lever to < and
continue cranking until the engine
runs.
Engine does not start in warm start
position <
N Move the choke lever to g and
continue cranking until the engine
runs.
If the engine does not start
N Check that all settings are correct.
N Check that there is fuel in the tank
and refuel if necessary.
N Check that the spark plug boot is
properly connected.
N Repeat the starting procedure.
Fuel tank run until completely dry
N After refueling, press the fuel pump
bulb at least five times – even if the
bulb is filled with fuel.
N Set the choke lever to suit the
engine temperature.
N Start the engine.
The unit features a split drive tube that
helps save space during transportation.
Disconnecting the Drive Tube
N Disconnect the shoulder strap from
the carrying ring.
N Place the unit on the ground:
N Loosen the star knob (1) – do not
remove it.
N Pull the front drive tube (2) out of the
coupling sleeve (3).
Make sure the carburetor is
correctly adjusted. The saw chain
must not move when the engine is
idling.
547BA021 KN
Transporting the Unit
4907BA004 KN
1
4907BA005 KN
3
2
HT 56 C
English
26
N Push the cap (4) onto the end of the
front drive tube.
Connecting the Drive Tube
N Pull the cap off the front drive tube
and keep it in a safe place.
N Put the powerhead on the ground so
that it rests on the machine support.
N Examine ends of drive tube for dirt
and clean if necessary.
N Slide 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.
When correctly installed, the red
line (7) (arrow point) must be flush with
the end of the coupling sleeve.
N Tighten down the star knob (1)
firmly.
N Attach the shoulder strap to the
carrying ring.
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
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".
Make sure the ends of the drive
tube are clean.
4
4907BA011 KN
5
4907BA006 KN
6
2
7
4907BA007 KN
1
Operating Instructions
Do not make the mixture leaner to
achieve an apparent increase in
power – this could damage the
engine – see "Adjusting the
Carburetor".
HT 56 C
English
27
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
N Slacken off the chain if you have
retensioned it at operating
temperature during cutting work.
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"
N Turn 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.
N Regularly clean the oil inlet hole (1),
the oilway (2) and the bar
groove (3).
N Measure the groove depth – with
the scale on the filing gauge (special
accessory) – in the area used most
for cutting.
If groove depth is less than specified:
N Replace the guide bar.
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.
The chain contracts as it cools
down. If it is not slackened off, it
can damage the gear shaft and
bearings.
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.
Taking Care of the Guide
Bar
Chain type Chain pitch Minimum
groove
depth
Rapid 1/4" 0.16"
(4.0 mm)
3
2
1
390BA050 KN
HT 56 C
English
28
If there is a noticeable loss of engine
power
N Move the choke lever (1) to <.
N Turn the screw (2) in the filter
cover (3) counterclockwise until the
cover is loose.
N Ease the filter cover (3) over the
choke lever and lift it away.
N Clean away loose dirt from around
the filter.
N Reach into the recess (4) in the filter
housing and take out the felt
filter (5).
N Fit 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.
N Fit the felt filter (5) in the filter
housing, make sure it is properly
seated – the arrow points to the
recess.
N Move the choke lever (1) to <.
N Fit the filter cover in position,
making sure the screw is square.
Tighten down the screw.
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
make corrections with the adjusting
screws within fine limits.
Standard Setting
N Shut off the engine
N Check chain tension
N Check the air filter and replace the
element if necessary.
N Have the spark arresting screen
(not all markets) checked – see
“Inspection and Maintenance by
Dealer"
N Turn the high speed screw (H)
counterclockwise as far as stop
(max. 3/4 turn possible).
N Turn the low speed screw (L)
counterclockwise as far as stop
(max. 3/4 turn possible).
Cleaning the Air Filter
1
547BA022 KN
2
3
Replace damaged parts.
547BA023 KN
4
Adjusting the Carburetor
547BA024 KN
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