STIHL HT 56 C
{
Instruction Manual
Notice d’emploi
G Instruction Manual
1 - 40
F Notice d’emploi
41 - 84
Contents
English
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Using the Unit 8
Assembling the Unit 10
Cutting Attachment 11
Mounting the Bar and Chain 12
Tensioning the Chain 13
Original Instruction ManualPrinted on chlorine-free paper
Checking Chain Tension 13
Fuel 13
Fueling 14
Chain Lubricant 17
Filling Chain Oil Tank 17
Checking Chain Lubrication 19
Fitting the Harness 19
Starting / Stopping the Engine 20
Transporting the Unit 21
Operating Instructions 22
Taking Care of the Guide Bar 23
Cleaning the Air Filter 24
Engine Management 25
Adjusting the Carburetor 25
Printing inks contain vegetable oils, paper can be recycled.
Spark Plug 26
Rewind Starter 27
Storing the Machine 27
Checking and Replacing the Chain
Sprocket 27
Maintaining and Sharpening the
Saw Chain 28
Inspections and Maintenance by
Dealer 32
Maintenance and Care 33
Main Parts 35
Specifications 37
Maintenance and Repairs 38
Disposal 38
STIHL Limited Emission Control
Warranty Statement 38
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
It has been built using modern
production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
{
© ANDREAS STIHL AG & Co. KG, 2015
0458-555-8221-A. VA1.A15.
0000006525_003_GB
HT 56 C
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 the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Fuel tank; fuel mixture of
gasoline and engine oil
Chain oil tank; chain oil
Direction of chain rotation
Operate manual fuel
pump
Manual fuel pump
Symbols in text
WARNING
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
NOTICE
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Safety Precautions and
Working Techniques
Special safety precautions must be observed
when working with the
pole pruner because it is
a high-speed, fast-cutting power tool with very
sharp cutters and a long
reach.
It is important that you
read the instruction manual before first use and
keep it in a safe place for
future reference. Nonobservance of the
instruction manual may
result in serious or even
fatal injury.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
experienced user show you how to
operate your machine or attend a
special course in its operation.
Minors should never be allowed to use a
power tool.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, shut it
off so that it does not endanger others.
Secure it against unauthorized use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
2
HT 56 C
English
390BA000 KN
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.
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
To operate the power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Use your pole pruner for limbing only
(removing or pruning branches). Only
cut wood or wooden objects.
Do not use your power tool for any other
purpose because of the increased risk of
accidents.
Only use guide bars, chains, chain
sprockets and accessories that are
explicitly approved for this power tool
model by STIHL or are technically
identical. If you have any questions in
this respect, consult a servicing dealer.
Use only high quality tools and
accessories in order to avoid the risk of
accidents and damage to the machine.
STIHL recommends the use of genuine
STIHL tools, guide bars, chains, chain
sprockets and accessories. They are
specifically designed to match the
product and meet your performance
requirements.
Never attempt to modify your machine in
any way since this may increase the risk
of personal injury. STIHL excludes all
liability for personal injury and damage
to property caused while using
unauthorized attachments.
Do not use a pressure washer to clean
the unit. The solid jet of water may
damage parts of the unit.
Clothing and Equipment
Wear proper protective clothing and
equipment.
Clothing must be sturdy
but allow complete freedom of movement. Wear
snug-fitting clothing, an
overall and jacket combination, do not wear a
work coat.
Avoid clothing that could get caught on
branches or brush or moving parts of the
machine. Do not wear a scarf, necktie or
jewelry. Tie up and confine long hair
(e.g. with a hair net, cap, hard hat, etc.).
Wear steel-toed safety
boots with non-slip soles
and cut-retardant inserts.
WARNING
To reduce the risk of eye
injuries, wear snug-fitting
safety glasses in accordance with European
Standard EN 166. Make
sure the safety glasses
are a good fit.
Wear hearing protection, e.g. earplugs
or ear muffs.
Wear a safety hard hat with chin strap
where there is a danger of head injuries
from falling objects.
Wear heavy-duty work
gloves made of durable
material (e.g. leather).
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Transporting the Power Tool
Always turn off the engine.
Always fit the chain guard (scabbard) –
even when you carry the unit for short
distances.
HT 56 C
3
English
Carry the power tool properly balanced
by the drive tube. To reduce the risk of
serious burn injuries, avoid touching hot
parts of the machine, especially the
surface of the muffler.
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Fueling
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
Always shut off the engine before
refueling.
Do not fuel a hot engine – fuel may spill
and cause a fire.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Fuel your power tool only in wellventilated areas. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
Your power tool comes standard with
either a screw-type or bayonet-type fuel
cap.
After fueling, tighten
down the screw-type fuel
cap as securely as
possible.
Insert the fuel cap with
hinged grip (bayonet-type
cap) correctly in the
opening, turn it clockwise
as far as stop and fold the
grip down.
This reduces the risk of unit vibrations
causing the fuel cap to loosen or come
off and spill quantities of fuel.
To reduce the risk of serious or fatal
burn injuries, check for fuel leakage. If
fuel leakage is found, do not start or run
the engine until leak is fixed.
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
– Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
– Correctly mounted guide bar
– Correctly tensioned chain
– Slide control / stop switch must
move easily to STOP or 0.
– Smooth action of throttle trigger
lockout (if fitted) and throttle trigger
– the throttle trigger must return
automatically to the idle position.
– Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
– Never attempt to modify the controls
or safety devices in any way.
– Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
– Adjust the harness to suit your
height and reach. See chapter on
"Fitting the Harness".
To reduce the risk of accidents, do not
operate your power tool if it is damaged
or not properly assembled.
If you use a shoulder strap or full
harness: Practice removing and putting
down the machine as you would in an
emergency. To avoid damage, do not
throw the machine to the ground when
practicing.
Starting the Engine
Start the engine at least 3 meters from
the fueling spot, outdoors only.
Place the unit on firm ground in an open
area. Make sure you have good balance
and secure footing. Hold the unit
securely. The chain must be clear of the
ground and all other obstructions
because it may begin to run when the
engine starts.
Your power tool is designed to be
operated by one person only. To reduce
the risk of injury, do not allow other
persons within 15 meters of your own
position – even when starting.
Start the engine as described in the
instruction manual.
4
HT 56 C
English
390BA026 KN
15m (50ft)
15m (50ft)
Note that the chain continues to run for a
short period after you let go of the
throttle trigger (flywheel effect).
Check idle speed setting: The chain
must not move when the engine is idling
with the throttle trigger released.
To reduce the risk of fire, keep hot
exhaust gases and hot muffler away
from easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
Holding and Controlling the Power Tool
Machines with telescoping shaft: Only
extend the telescoping shaft as far as
necessary for the cutting work that
needs to be done.
During Operation
Make sure you always have good
balance and secure footing.
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the slide control
/ stop switch to STOP or 0.
This power tool is not
insulated against electric
shock. To reduce the risk
of electrocution maintain
a minimum clearance of
15 meters from electric
power lines.
To reduce the risk of damage to
property, also maintain this distance
from other objects (vehicles, windows).
Maintain a minimum clearance of
15 meters between the bar nose and
electric power lines. Electricity can jump
considerable distances by means of
arcing. Higher voltage increases the
distance electricity can arc. Have the
power switched off before starting
cutting work in the immediate vicinity of
power lines.
To reduce the risk of injury, shut off the
engine before changing the saw chain.
Make sure the idle speed setting is
correct. The chain must not run when
the engine is idling with the throttle
trigger released.
It the chain still rotates, have your dealer
make proper adjustments or repairs.
Check and correct the idle speed setting
regularly.
Never leave a running power tool
unattended.
Take special care in slippery conditions
(ice, wet ground, snow) – on slopes or
uneven ground.
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
Always hold the unit firmly with both
hands – right hand on the control handle,
left hand on the drive tube – even if you
are left-handed. Wrap your fingers
around the control handle and drive
tube.
HT 56 C
To reduce the risk of injury from falling
objects and thrown pieces of wood, do
not allow any other persons within a
radius of 15 meters of your own position.
When working at heights:
– Always use a lift bucket
– Never work on a ladder or in a tree
– Never work on an insecure support
– Never operate your power tool with
one hand
5
English
max
60°
390BA025 KN
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated locations, even if your model
is equipped with a catalytic converter.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
The dusts (e.g. sawdust), vapor and
smoke produced during operation may
be dangerous to health. If dust levels are
very high, wear a suitable respirator.
If your power 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 – see also
"Before Starting". Check the fuel system
in particular for leaks and make sure the
safety devices are working properly. Do
not continue operating your power tool if
it is damaged. In case of doubt, consult
your servicing dealer.
If you use a shoulder strap, make sure
exhaust gases are diverted away from
your body since there is otherwise a risk
of fire.
Limbing
Hold the pole pruner at an angle. Do not
stand directly underneath the limb being
cut. Do not exceed an angle of 60° from
the horizontal. Watch for falling wood.
Keep the work area clear – remove
interfering limbs and brush.
Before limbing, establish a path of
escape and remove all obstacles.
6
HT 56 C
English
390BA052 KN
Position the cutting attachment with the
hook against the branch and then
perform the cross-cut. This reduces the
risk of the pruner being jerked forward
as you start the cross-cut.
Always start the cut with the engine at
full throttle.
Always cut with a correctly sharpened,
properly tensioned chain – the depth
gauge setting must not be too large.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
Perform cross-cut from the top
downward to avoid the chain pinching in
the cut.
If branch is thick or heavy, make a
relieving cut – see chapter on "Using the
Pole Pruner".
To reduce the risk of injury, take special
care when cutting branches under
tension. Always make a relieving cut on
the compression side first and then
perform the bucking cut at the tension
side.
To reduce the risk of injury, take special
care when cutting shattered wood
because of the risk of injury from slivers
being caught and thrown in your
direction.
If on a slope, stand on the uphill side or
to one side of the branch to be cut.
Watch out for rolling branches.
Note when reaching the end of a cut that
the unit is no longer supported by the
guide bar in the cut. You have to take the
full weight of the machine since it might
otherwise go out of control.
Always pull the unit out of the cut with
the chain running.
To reduce the risk of accidents, use your
pole pruner for limbing and pruning only.
It is not designed for felling.
Make sure your saw chain does not
touch any foreign materials: Stones,
nails, etc. may be flung off and damage
the saw chain.
If the rotating chain makes contact with
a rock or other solid object there is a risk
of sparking which may cause easily
combustible material to catch fire under
certain circumstances. Dry plants and
scrub are also easily combustible,
especially in hot and dry weather
conditions. If there is a risk of fire, do not
use your pole pruner near combustible
materials, dry plants or scrub. Always
contact your local forest authority for
information on a possible fire risk.
Before leaving the power tool
unattended: Shut off the engine.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
– Hand protection (wearing warm
gloves)
– Work breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
– Low outside temperatures.
– The force with which the handles
are held (a tight grip restricts
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
HT 56 C
7
English
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
STIHL recommends the use of genuine
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
To reduce the risk of injury, always shut
off the enginebefore carrying out any
maintenance or repairs or cleaning the
machine. – Exception: Carburetor and
idle speed adjustments.
Do not turn the engine over on the
starter with the spark plug boot or spark
plug removed unless the slide control /
stop switch is on STOP or 0 since there
is otherwise a risk of fire from
uncontained sparking.
To reduce the risk of fire, do not service
or store your machine near open flames.
Check the fuel filler cap for leaks at
regular intervals.
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
Inspect the ignition lead (insulation in
good condition, secure connection).
Check the condition of the muffler.
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing.
Do not touch a hot muffler since burn
injury will result.
Stopping the engine
– before checking chain tension.
– before retensioning the chain.
– before replacing the chain.
– before rectifying problems.
Observe sharpening instructions – keep
the chain and guide bar in good
condition at all times for safe and correct
handling of the saw. The chain must be
properly sharpened, tensioned and well
lubricated.
Always change the chain, guide bar and
sprocket in good time.
Store fuel and chain lubricant in properly
labelled, safety-type canisters only.
When handling gasoline, avoid direct
contact with the skin and avoid inhaling
fuel vapour – health risk.
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.
For any maintenance please refer to the
maintenance chart and to the warranty
statement near the end of the instruction
manual.
Using the Unit
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.
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 Technique
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.
8
HT 56 C
English
275BA002 KN
390BA052 KN
2
1
390BA041 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 concerned.
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.
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 Perform the cross-cut (2) – position
the bar with the hook against the
branch and then perform the crosscut.
Flush-cutting thick branches
If branch diameter is more than
10 cm (4 in), first
N perform 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
hook against the branch and then
perform the cross-cut from the top
downwards.
HT 56 C
9
English
275BA003 KN
275BA008 KN
1
2
390BA053 KN
4907BA004 KN
1
4907BA008 KN
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
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.
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
Unit".
Connecting the Drive Tube
WARNING
Do not mount KombiTools – only use the
drive tube with splined shaft supplied
with the machine.
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.
10
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.
HT 56 C
English
2
4907BA009 KN
4
3
6
5
4907BA010 KN
001BA248 KN
1
2
3
a
001BA244 KN
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.
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
The scope of supply includes a bar
scabbard that matches the cutting
attachment.
If guide bars of different lengths are
mounted to the pole pruner, always use
a chain scabbard of the correct length
which covers the complete guide bar.
The length of the matching guide bars is
marked on the side of the chain
scabbard.
11
HT 56 C
English
390BA042 KN
1
2
390BA043 KN
390BA003 KN
1
5
390BA044 KN
4
3
Mounting the Bar and Chain
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
WARNING
Wear work gloves to protect your hands
from the sharp cutters.
N Fit the chain – start at the bar nose.
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"
12
HT 56 C
English
1
390BA045 KN
390BA046 KN
Tensioning the 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".
Checking Chain Tension
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".
Fuel
This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your engine requires a mixture of highquality premium gasoline and highquality two-stroke air-cooled engine oil.
Use premium branded unleaded
gasoline with a minimum octane rating
of 89 (R+M)/2.
Note: Models equipped with a catalytic
converter require unleaded gasoline. A
few tankfuls of leaded gasoline can
reduce the efficiency of the catalytic
converter by more than 50%.
Fuel with a lower octane rating may
result in preignition (causing "pinging")
which is accompanied by an increase in
engine temperature. This, in turn,
increases the risk of the 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 as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
high-quality fuels!
Fuels with different percentages of
ethanol are being offered. Ethanol can
affect the running behaviour of the
engine and increase the risk of lean
seizure.
HT 56 C
13
English
547BA009 KN
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.
Engines equipped with M-Tronic can be
run on gasoline with an ethanol content
of up to 25% (E25).
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke aircooled engine oils for mixing.
We recommend STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STIHL engines.
Do not use BIA or TCW (two-stroke
water cooled) mix oils!
Use only STIHL 50:1 heavy-duty engine
oil or an equivalent quality two-stroke
engine oil for the fuel mix in models
equipped with a catalytic converter.
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The fuel tank and the canister in which
fuel mix is stored should be cleaned
from time to time.
Fuel mix ratio
Examples
Gasoline Oil (STIHL 50:1 or equiva-
lent high-quality oils)
liters liters (ml)
10.02(20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
Dispose of empty mixing-oil canisters
only at authorized disposal locations.
Fueling
Preparations
N Before fueling, clean the 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.
A number of different filler caps are
installed as standard at the factory.
Only mix sufficient fuel for a few days
work, not to exceed 30 days of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
14
HT 56 C
Closing tank cap with hinged grip
002BA418 KN
002BA419 KN
001BA218 KN
001BA219 KN
001BA224 KN
001BA220 KN
001BA221 KN
001BA222 KN
English
Cliplock filler cap (bayonet-type)
Threaded filler cap
Opening tank cap with hinged grip
N Swing the grip to the upright
position.
N Rotate the cap about 1/4 turn
counterclockwise.
N Remove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
N Filling up with fuel
Grip must be vertical:
N Fit the cap in the opening – the
marks on the cap and filler neck
must line up.
N Press the cap down as far as stop.
N While holding the cap depressed,
turn it clockwise until it engages in
position.
HT 56 C
N Fold the grip flush with the top of the
cap.
15
English
001BA223 KN
001BA225 KN
001BA227 KN
001BA226 KN
002BA447 KN
002BA448 KN
Checking security of cap
– The lug on the grip must fully
engage the recess (arrow).
N Grip the cap – it is properly locked if
it cannot be turned or removed.
If the cap can be turned or removed
Bottom of cap is twisted in relation to
top:
Left: Bottom of cap twisted
Right: Bottom of cap correctly
positioned
N Place the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
N Continue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
N Turn and lock the cap clockwise –
see sections on "Closing" and
"Checking security of cap".
Opening screw-type tank cap
N Turn the cap counterclockwise until
it can be removed from the tank
opening.
N Remove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank. STIHL
recommends you use the STIHL filler
nozzle (special accessory).
Closing screw-type tank cap
16
N Place the cap in the opening.
N Turn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
HT 56 C
English
390BA047 KN
002BA575 KN
002BA576 KN
002BA577 KN
Chain Lubricant Filling 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
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
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
tank cap faces up.
Opening
N Raise the grip until it is upright.
N Turn the cap counterclockwise
(about a quarter turn).
NOTICE
Waste oil does not have the necessary
lubricating properties and is unsuitable
for chain lubrication.
HT 56 C
Marks on tank cap and oil tank must line
up.
17
English
002BA578 KN
002BA577 KN
002BA579 KN
002BA580 KN
002BA581 KN
002BA583 KN
N Remove the cap.
Filling the chain oil tank
N Fill up with chain oil
Take care not to spill chain oil while
refilling and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for chain oil (special
accessory).
Closing
Grip must be vertical:
N Fit the cap – marks on tank cap and
oil tank must line up.
N Press the cap down as far as stop.
N While holding the cap depressed,
turn it clockwise until it engages in
position.
The marks on the cap and oil tank are
then in alignment.
N Fold the grip down.
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.
N Remove the cap from the oil tank
and check it from above.
18
HT 56 C
English
002BA584 KN
1
002BA576 KN
390BA048 KN
2
4907BA000 KN
1
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.
N Place the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
N Continue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
N Turn the cap clockwise and lock it in
position – see section on "Closing".
Checking Chain Lubrication
The saw chain must always throw off a
small amount of oil.
NOTICE
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.
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".
Fitting the Harness
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.
HT 56 C
19
English
3
1
2
4907BA001 KN
4
547BA015 KN
5
547BA016 KN
5
547BA017 KN
275BA007 KN
Starting / Stopping the
Engine
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, 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
N Press the manual fuel pump
bulb (4) at least five times – even if
the bulb is 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)
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.
WARNING
Check that nobody is standing within the
working range of the pruner.
N Make sure you have a safe and
secure 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.
20
NOTICE
Do not stand or kneel on the drive tube.
N Hold the starter grip with your right
hand.
N Press in the choke lever (5) and turn
it to < at the same time.
N Pull the starter grip steadily.
HT 56 C
English
547BA021 KN
4907BA004 KN
1
4907BA005 KN
3
2
NOTICE
Do not pull out the starter rope all the
way – it might otherwise break.
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 engine runs.
As soon as the engine runs
N Press 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.
Other Hints on Starting
Engine stalls in cold start position g or
under acceleration
N Move the choke knob to < and
continue cranking until the engine
runs.
Engine does not start in warm start
position <
N Move the choke knob 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 manual
fuel pump bulb at least five times –
even if the bulb is filled with fuel.
N Set the choke knob to suit the
engine temperature.
N Start the engine.
Transporting the Unit
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 dri ve tube (2 ) out of the
coupling sleeve (3).
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.
HT 56 C
21
English
4
4907BA011 KN
5
4907BA006 KN
6
2
7
4907BA007 KN
1
N Push the cap (4) onto the end of the
front drive tube.
NOTICE
Make sure the ends of the drive tube are
clean.
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.
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.
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.
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.
22
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".
HT 56 C
English
3
2
1
390BA050 KN
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".
NOTICE
The chain contracts as it cools down. If it
is not slackened off, it can damage the
gear shaft and bearings.
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.
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
Fit the chain scabbard and allow engine
to cool down. To avoid condensation, fill
the fuel tank and keep the machine in a
dry place, well away from sources of
ignition, until you need it again.
Storing for a long period
See chapter on "Storing the Machine"
Taking Care of the Guide Bar
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.
Chain type Chain pitch Minimum
groove
depth
Picco 1/4" P 4.0 mm
If groove depth is less than specified:
N Replace the guide bar.
HT 56 C
23
English
1
547BA022 KN
2
3
547BA023 KN
4
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
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.
NOTICE
Replace damaged parts.
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.
24
HT 56 C
English
0815BA006 KN
Engine Management Adjusting the Carburetor
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
N Warm up the engine for about
3 minutes.
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the saw chain must
not rotate.
Chain rotates when engine is idling
N Turn 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.
WARNING
If the saw chain continues to rotate when
the engine is idling, have your machine
checked and repaired by your servicing
dealer.
HT 56 C
25
Loading...