STIHL HT-KM Owner's Manual

STIHL HT-KM

STIH)

Instruction Manual Manual de instrucciones

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.

Contents

English / USA

KombiSystem ................................... 2

Guide to Using this Manual .............. 2

Safety Precautions and

Working Techniques ......................... 3

Using the Pole Pruner .................... 13

Approved KombiEngines ................ 16

Mounting the Pole Pruner ............... 16

BA_SE_119_006_01_10.fmPrinted on chlorine-free paper.

Mounting the KombiTool ................. 17

Mounting the Bar and Chain ........... 17

Tensioning the Saw Chain .............. 18

Checking Chain Tension ................. 18

Chain Lubricant .............................. 19

Filling Chain Oil Tank ...................... 19

Checking Chain Lubrication ........... 20

Fitting the Harness ......................... 20

Starting / Stopping the Engine ........ 21

Operating Instructions .................... 21

Storing the Machine ........................ 22

Taking Care of Guide Bar ............... 22

Checking and Replacing

the Chain Sprocket ......................... 23

Maintaining and Sharpening

Saw Chain ...................................... 24

Maintenance Chart ......................... 28

Parts and Controls .......................... 29

Specifications ................................. 30

Printing inks contain vegetable oils; paper can be recycled.

Special Accessories ....................... 30

Maintenance and Repairs ............... 31

Trademarks .................................... 32

Allow only persons who understand the manuals of the KombiEngine and pole pruner KombiTool to operate this power tool combination.

To receive maximum performance and satisfaction from your STIHL KombiTool, it is important that you read and understand the maintenance and safety precautions, starting on page 3, before using your KombiTool.

Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this Manual.

!Warning!

Because this power-tool is a high-speed cutting tool with a very long reach some special safety precautions must be observed to reduce the risk of personal injury.

Careless or improper use may cause serious or even fatal injury.

STIHL's philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. If the operating characteristics or the appearance of your attachment differs from those described in this Manual, please contact your STIHL dealer for information and assistance.

STIHl

0458 473 8621 A. M7. B9. CP. Printed in USA

1HT-KM

English / USA

KombiSystem

In the STIHL KombiSystem a number of different KombiEngines and KombiTools can be combined to produce a power tool. In this instruction manual the functional unit formed by the KombiEngine and KombiTool is referred to as the power tool.

The KombiEngine and KombiTool come with separate instruction manuals.

Always read and make sure you understand both instruction manuals before starting and using your machine. Keep the manuals in a safe place for later reference.

Guide to Using this Manual

Pictograms

All the pictograms attached to the machine are shown and explained in this manual.

The operating and handling instructions are supported by illustrations.

Symbols in text

The individual steps or procedures described in the manual may be marked in different ways:

: A bullet marks a step or procedure

without direct reference to an illustration.

A description of a step or procedure that refers directly to an illustration may

002BA159 KN

contain item numbers that appear in the illustration. Example:

Loosen the screw (1) 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 described below:

Warning where there is a risk of an accident or personal injury or serious damage to property.

Caution where there is a risk of damaging the machine or its individual components.

Note or hint which is not essential for using the machine, but may improve the operator’s understanding of the situation and result in better use of the machine.

Note or hint on correct procedure in order to avoid damage to the environment.

HT-KM

Safety Precautions and Working Techniques

English / USA

Equipment and features

This instruction manual may refer to several models with different features. Components that are not installed on all models and related applications are marked with an asterisk (*). Such components may be available as special accessories from your STIHL dealer.

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. If the operating characteristics or the appearance of your machine differ from those described in this manual, please contact your STIHL dealer for assistance.

Therefore some changes, modifications and improvements may not be covered in this manual.

Because a KombiEngine equipped with a pole pruner KombiTool is a high-speed, fast-cutting 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 manuals and the safety precautions for your KombiEngine and pole pruner KombiTool periodically. Careless or improper use may cause serious or fatal injury.

Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.

!Warning!

Do not lend or rent your power tool without the instruction manuals for your KombiEngine and pole pruner KombiTool. Be sure that anyone using it understands the information contained in these manuals.

!Warning!

The use of this machine may be hazardous. The pole pruner chain has many sharp cutters. If the cutters contact your flesh, they will cut you, even if the chain is not moving.

Do not cut any material other than wood or wooden objects. Use your pole pruner for limbing only. It must not be used for any other purposes, since such misuse may result in an accident or damage to the machine.

!Warning!

Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.

!Warning!

To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.

3HT-KM

English / USA

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 KombiEngine and KombiTool instruction manuals for a description of the controls and the function of the parts of your model.

Safe use of a pole pruner involves

1. the operator

2. the pole pruner

3. the use of the pole pruner.

THE OPERATOR

Physical Condition

You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.

!Warning!

Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating this machine.

Proper Clothing

!Warning!

To reduce the risk of injury, the operator should wear proper protective apparel.

!Warning!

To reduce the risk of injury

to your eyes never

operate your power tool

unless wearing goggles or

properly fitted protective

glasses with adequate top and side protection complying with ANSI 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.

Wear an approved safety hard hat to reduce the risk of injury to your head.

Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

Always wear gloves when handling the machine and the cutting tool. Heavyduty, nonslip gloves improve your grip and help to protect your hands.

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear long pants made of heavy

material to help protect your legs. Do not wear shorts, sandals or go barefoot.

Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.

Good footing is very

important. Wear sturdy

boots with nonslip soles.

Steel-toed safety boots

with cut retardant inserts

are recommended.

HT-KM

English / USA

THE POLE PRUNER KOMBITOOL

For illustrations and definitions of the pole pruner KombiTool parts see the chapter on “Main Parts and Controls.”

!Warning!

Never modify this KombiTool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous.

If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work. Check in particular that the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. In case of doubt, have it checked by your STIHL servicing dealer.

THE USE OF THE UNIT (KOMBIENGINE EQUIPPED WITH POLE PRUNER KOMBITOOL)

Transporting the Power Tool

!Warning!

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.

!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.

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 manuals.)

!Warning!

Always check your power tool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger interlock, stop switch and cutting attachment. The throttle trigger must move freely and always spring back to

390BA000 KN

the idle position. Never attempt to modify the controls or safety devices.

!Warning!

Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled.

5HT-KM

English / USA

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.

!Warning!

Proper chain tension is extremely important. In order to avoid improper setting, the tensioning procedure must be followed as described in your manual. Always make sure the hex nut(s) for the sprocket cover is (are) tightened securely after tensioning the chain. Check chain tension once more after having tightened the nut(s). Never start the pole pruner with the sprocket cover loose.

Adjust carrying harness and hand grip to suit your size before starting work.

Starting

!Warning

To reduce the risk of fire and burn injuries, start the engine at least 10 feet (3 meters) from the fueling spot, outdoors only.

Start and operate your pole pruner without assistance.

For specific starting instructions, see the appropriate section of your KombiEngine manual. Proper starting methods reduce the risk of injury.

Place the pole pruner on firm ground or other solid surface in an open area or, in the alternative, as shown in the above picture. Maintain good balance and secure footing.

!Warning!

To reduce the risk of injury from loss of control, do not attempt to “drop start” your power tool.

!Warning!

To reduce the risk of injury from loss of control be absolutely sure that the guide bar and chain are clear of you and all other obstructions and objects, including the ground, because when the engine starts at starting-throttle, engine speed will be fast enough for the clutch to engage the sprocket and turn the chain.

Once the engine has started, immediately blip the throttle trigger, which should release the starting throttle and allow the engine to slow down to idle.

With the engine running only at idle, attach the power tool to the spring hook of your harness (see appropriate chapter of this manual).

!Warning!

When you pull the starter grip, do not

275BA006 KN

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.

HT-KM

English / USA

Important Adjustments

!Warning!

To reduce the risk of personal injury from loss of control or contact with the running cutting tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the saw chain should not move. For directions on how to adjust idle speed, see the appropriate section of your KombiEngine instruction manual.

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.

!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.

!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 15 feet (4.5 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.

402BA000 KN

Place your left hand on front handle 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.

!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.

7HT-KM

English / USA

Working conditions

Operate and start your power tool only outdoors in a well ventilated area. Operate it under good visibility and daylight conditions only. Work carefully.

!Warning!

As soon as the engine is running, this product generates toxic exhaust fumes containing chemicals, such as

unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be colorless and odorless. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in poorly ventilated locations. If exhaust fumes become concentrated due to insufficient ventilation, clear obstructions from work area to permit proper ventilation before proceeding and/or take frequent breaks to allow fumes to dissipate before they become concentrated.

!Warning!

Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. This includes wood dust, especially from hardwoods, but also from some softwoods such as Western Red Cedar. Control dust at the source where possible. Use good work practices, such as always cutting with a properly sharpened chain (which produces wood chips rather than fine dust) and operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA/OSHA/ NIOSH and occupational and trade associations with respect to dust (“particulate matter”). When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH/ MSHA for the type of dust encountered.

!Warning!

Breathing asbestos dust is dangerous and can cause severe or fatal injury, respiratory illness or cancer. The use and disposal of asbestos-containing products have been strictly regulated by OSHA and the Environmental Protection Agency. If you have any reason to believe that you might be cutting asbestos, immediately contact your employer or a local OSHA representative.

!Warning

This power tool has a large range. In order to reduce the risk of personal or even fatal injury to bystanders from falling objects or inadvertent contact with the moving chain of your power tool always keep bystanders at least 50 feet (15 m) away when the power tool is running.

!Warning!

Even though bystanders should be kept away from the running saw, never work alone. Keep within calling distance of others in case help is needed.

Stop the engine immediately if you are approached.

HT-KM

English / USA

15m (50ft)

Danger!

Your power tool is not

insulated against electric

shock. To reduce the risk

of electrocution, never operate this power tool in the vicinity of any wires or cables (power, etc.) which may be carrying electric current.

Electricity can jump from one point to another by means of arcing. Higher voltage increases the distance electricity can arc. Electricity can also move through branches, especially if they are wet. Maintain a clearance of at least 50 feet (15 m) between the pole pruner (including any branches it is contacting) and any electrical line carrying live current. Before working with less clearance, contact your electric utility and make sure the current is turned off.

Operating instructions

!Warning!

Do not operate your power tool using the starting throttle lock, as you do not have control of the engine speed.

In the event of an emergency, switch off the engine immediately – move the slide control / stop switch to 0 or STOP.

!Warning

To reduce the risk of cut injuries, keep hands and feet away from the saw chain. Never touch a moving chain with your hand or any other part of your body. The saw chain continues to move for a short period after the throttle trigger is released (inertia effect).

!Warning!

Accelerating the engine while the chain is blocked increases the load and will cause the clutch to slip continuously. This may result in overheating and damage to important components (e.g. clutch, polymer housing components) – which can then increase the risk of injury from the chain moving while the engine is idling.

!Warning!

If the chain becomes clogged, always turn off the engine and make sure the chain has stopped before cleaning.

Make sure that the saw chain does not touch any foreign materials such as rocks, fences, nails and the like. Such objects may be flung off and injure the operator or bystanders, or damage the saw chain.

!Warning!

Prior to limbing, clear the working area from interfering limbs and brush. Then, establish an escape area away from where the cut limbs can fall, and remove all obstacles.

Keep work area clear – move away fallen limbs. Place all tools and equipment at a safe distance from the branches being limbed, but not in the escape area.

!Warning!

Always observe the general condition of the tree. Look for decay and rot in the trunk and branches. If it is rotted inside, it could snap and fall toward the operator while being cut. Also look for broken or dead branches which could vibrate loose and fall on the operator. If branch is thick or heavy, make a shallow relief cut on the bottom of the branch before cutting down from the top to help prevent splitting of the branch.

9HT-KM

English / USA

!Warning!

To reduce the risk of severe or even fatal injury from falling objects do not cut vertically above your body. Hold the pole pruner at an angle of not more than 60° from the horizontal level (see picture). Objects may fall in unexpected directions. Do not stand directly underneath the limb being cut!

Watch for falling wood! As soon as the limbed branch starts to fall, step aside and keep a sufficient distance away from the falling wood.

!Warning

Always pull the unit out of the cut with the chain running to reduce the possibility of pinching the cutting attachment. Don't put pressure on the pole pruner when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control and strike some other object.

If the bar becomes pinched and caught in the branch so that the chain can no longer move, shut off the pole pruner

275BA005 KN

and carefully move the branch to open the pinch and release the bar.

Reactive forces

!Warning!

Reactive forces may occur any time the chain is rotating.The force used to cut wood can be reversed and work against the operator. If the rotating chain is suddenly stopped by contact with any solid object such as a branch or is pinched, the reactive forces may occur instantly. These reactive forces may result in loss of control, which, in turn, may cause personal injury. An understanding of the causes of these reactive forces may help you avoid the element of surprise and loss of control.

Because of the design of the pole pruner, the reactive forces experienced when working with it are generally not as severe as those encountered with a chainsaw. 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.

HT-KM

English / USA

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 chainsaw 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

002BA230 KN

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

B = Pushback

Pushback occurs when the chain on the

001BA037 KN

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.

001BA038 KN

11HT-KM

English / USA

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.

!Warning!

Use only identical STIHL replacement parts for maintenance and repair. Use of non-STIHL parts may cause serious or fatal injury.

Strictly follow the maintenance and repair instructions in the appropriate sections of your instruction manuals. Please refer to the maintenance charts in the manuals.

!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 manuals. Have such work performed by your STIHL servicing dealer only.

Wear gloves when handling or performing maintenance on the cutting attachment.

!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.

Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.

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 the KombiEngine 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!

HT-KM

Using the Pole Pruner

English / USA

Preparations

: Wear suitable protective clothing

and equipment – see "Safety Precautions".

: Start the engine. : Put on the shoulder strap.

Never throw cuttings into the household garbage can – they can be composted!

Never stand directly under the branch you are cutting – be wary of falling branches. Note that a branch may spring back at you after it hits the ground!

Cutting sequence

To allow branches a free fall, always cut the lower branches first. Prune heavy branches (large diameter) in several controllable pieces.

Working position

Hold the control handle with your right hand, and the drive tube with your left hand. Your left arm should be extended to the most comfortable position.

The most convenient working position is a tool angle of 60°, but any lesser angle may be used to suit the situation concerned.

Cross-cutting

390BA052 KN

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.

402BA012 KN

The shaft should always be held at an angle of 60° or less!

13HT-KM

English / USA

Relieving cut

: To avoid tearing the bark on thick

branches, always start by performing a relieving cut (1) on the underside of the branch.

: To do this, apply the cutting

attachment and pull it in an arc across the bottom of the branch (see illustration).

: Locate the hook against the branch

and then perform the cross-cut (2).

390BA041 KN

Flush-cutting thick branches

: If branch diameter is more than

4“ (10 cm), first perform undercut (3) and then cross-cut at a distance (A) of about 8“ (20 cm) from the final cut. Then carry out the flush-cut (4), starting with a relieving cut and finishing with a cross-cut.

390BA024 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.

402BA013 KN

HT-KM

English / USA

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.

402BA014 KN

30° angle drive (special accessories)

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:

: For cutting vertical branches and

bushes, horizontally (1)

: For a better view of the cutting

attachment (2)

390BA053 KN

15HT-KM

English / USA

Approved KombiEngines Mounting the Pole Pruner

Only use KombiEngines supplied by STIHL or expressly approved by STIHL for use with the KombiTool.

This KombiTool may be operated only in combination with the following KombiEngines:

STIHL KM 55 R, KM 55 RC, KM 90 R, KM 85 R, KM 110 R, KM 130 R

The KombiTool may also be mounted to STIHL brushcutters with a split boom or drive tube (T models).

Operation of this KombiTool is therefore also permitted on the following power tool models:

STIHL FS 55 RT, FS 55 RTC, FS 85 RT, FS 83 RT

Mounting the Gearbox

Pull the protective caps off the ends of the drive tube and keep them in a safe place.

: Apply a mark to the drive tube at a

distance A of 50 mm (2“).

The gearbox is correctly positioned if it reaches or covers the mark (see arrow).

: Insert clamp screws (3) as far as

402BA002 KN

402BA023 KN

stop.

: With the engine is resting on the

machine support, line up the gearbox (1) so that the clamp screws face up and the chain sprocket cover is exactly vertical.

: Tighten down the clamp screws (3)

in the following sequence:

– tighten the left screw moderately – tighten the right screw moderately – tighten down the left screw firmly – tighten down the right screw firmly

402BA024 KN

: Push the gearbox (1) onto the drive

tube (2) as far as stop – turn the gearbox back and forth until the square end of the shaft engages.

HT-KM

English / USA

Mounting the KombiTool

Mounting

: Engage lug (1) on drive tube in

slot (2) in the coupling sleeve and push home the drive tube as far as stop.

: When correctly installed, the red

line (3) (arrow point) must be flush with the end of the coupling sleeve.

: Tighten the wing screw (4) firmly.

Mounting the Bar and Chain

002BA132 KN

: Unscrew nut and take off cover.

002BA133 KN

: Turn tensioning screw (1)

counterclockwise until the tensioning nut (2) butts against the left end of the housing slot, then back it off 5 full turns.

390BA042 KN

390BA043 KN

The chain is very sharp – wear work gloves to protect hands from cuts.

: Fit the chain –

start at the bar nose.

390BA003 KN

Removing

: Reverse the above sequence to

remove the drive tube.

17HT-KM

English / USA

: Fit guide bar over the stud (3).

Engage peg of tensioner slide in locating hole (4) – place the chain over sprocket (5) at the same time.

: Now turn tensioning screw (1)

clockwise until there is very little chain sag on the underside of the bar – and the drive link tangs are located in the bar groove.

: Refit the sprocket cover and screw

on the nut only fingertight.

: Now refer to "Tensioning the Saw

Chain".

Tensioning the Saw Chain

390BA044 KN

Retensioning during cutting work:

: Shut off the engine and then

slacken the nut.

: Hold the bar nose up. : Use screwdriver to turn the

tensioning screw (1) clockwise until chain fits snugly against the underside of the bar. Tighten down the nut firmly.

A new chain has to be retensioned more often than one that has been in use for some time – check chain tension frequently – see chapter "Operating Instructions / During Operation".

: Check chain tension.

Checking Chain Tension

390BA045 KN

: Shut down the engine. : Wear work gloves to protect hands. : 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.

: If necessary, retension the chain.

A new chain has to be retensioned more often than one that has been in use for some time. Check chain tension frequently – see chapter "Operating Instructions / During Operation".

390BA046 KN

HT-KM

Chain Lubricant Filling Chain

Oil Tank

English / USA

For automatic and reliable lubrication of the chain and guide bar – use only an environmentally

compatible quality chain and bar lubricant with non-fling additive or the rapidly biodegradable STIHL BioPlus is recommended.

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.

If special chain lubricant is not available, you may – in an emergency – use an HD single grade or multigrade engine oil with a viscosity that suits the prevailing outside temperature.

Do not use waste oil!

Medical studies have shown that renewed contact with waste oil can cause skin cancer. Moreover, waste is environmentally harmful!

Waste oil does not have the necessary lubricating properties and is unsuitable for chain lubrication.

390BA047 KN

: 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!

: Thoroughly clean the filler cap and

area around it so that no dirt can fall into the tank.

: Position the unit so that the filler cap

faces up.

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 servicing dealer for assistance if necessary. STIHL recommends that you have maintenance and repair work performed only by a STIHL servicing dealer.

19HT-KM

+ 46 hidden pages