Stihl MS170-MS180 Service/Shop Repair Manual

Instruction Manual Manual de instrucciones Warning! To reduce the risk of kickback injury use STIHL reduced kickback bar and STIHL PM 1 (3/8" Picco) or RM 2 (0.325") chain depending on sprocket pitch or other available low kickback components. Advertencia! Para reducir el riesgo de lesionarse como resultado de un culatazo, utilice la barra de contragolpe reducido y la cadena PM 1 (Picco de 3/8 pulg) o RM 2 (0.325 pulg) de STIHL, dependiendo de la rueda dentada usada y de otros componentes reductores de contragolpe. Read and follow all safety precautions in Instruction Manual – improper use can cause serious or fatal injury. Lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales. STIH) STIHL MS 170, 180

1 MS 170, MS 180, MS 180 C English / USA BA_SE_094_003_01_11.fm Printed on chlorine-free paper. Printing inks contain vegetable oils; paper can be recycled. © ANDREAS STIHL AG & Co. KG, 2005 0458 207 3021 A. M21. H5. CP. Printed in USA STIHl Contents Guide to Using this Manual .............. 2 Some Important Safety Precautions for Chain Saw Users ........................ 3 Easy2Start ........................................ 5 Safety Precautions ........................... 5 Mounting the Bar and Chain (Front chain tensioner) ................... 27 Mounting the Bar and Chain (Quick Chain Tensioner) ................. 28 Tensioning the Saw Chain (Front chain tensioner) ................... 31 Tensioning the Saw Chain (Quick chain tensioner) .................. 31 Checking Chain Tension ................. 32 Fuel ................................................ 32 Fueling ............................................ 33 Chain Lubricant .............................. 34 Filling Chain Oil Tank ...................... 34 Checking Chain Lubrication ........... 35 Chain Brake .................................... 35 Information Before You Start .......... 36 Starting / Stopping the Engine ........ 37 Operating Instructions .................... 40 Taking Care of Guide Bar ............... 41 Cleaning the Air Filter ..................... 42 Motor Management ........................ 43 Adjusting the Carburetor ................ 43 Spark Arresting Screen* in Muffler ......................................... 44 Catalytic Converter* ........................ 44 * see "Guide to Using this Manual" Checking the Spark Plug ................ 44 Starter Rope ................................... 45 Storing the Machine ....................... 46 Checking and Replacing Chain Sprocket ............................... 46 Maintaining and Sharpening Saw Chain ...................................... 48 Maintenance Chart ......................... 52 Main Parts of the Saw .................... 54 Specifications ................................. 56 Special Accessories ....................... 57 Ordering Spare Parts ..................... 57 Maintenance and Repairs .............. 58 STIHL Incorporated Federal and California Emission Control Warranty Statement ........................ 59 Allow only persons who understand this Manual to operate your chainsaw. To receive maximum performance and satisfaction from your STIHL chainsaw, it is important that you read and understand the maintenance and safety precautions, starting on page 3, before using your chainsaw. Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this Manual. !Warning! Because a chainsaw is a high-speed wood-cutting tool, some special safety precautions must be observed as with any other power saw 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 chainsaw differs from those described in this Manual, please contact your STIHL dealer for information and assistance.

2 English / USA MS 170, MS 180, MS 180 C 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 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. 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. Guide to Using this Manual

3 MS 170, MS 180, MS 180 C English / USA A. A Summary of Warnings on kickback and other Selected Risks – Taken Primarily from ANSI B 175.1 (See also the “Safety Precautions“ section of this Owner’s Manual) !Warning! Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. Tip contact in some cases may cause a lightning fast reverse reaction, kicking the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw which could result in serious personal injury. Section 5.11 of ANSI B 175.1-2000 sets certain performance and design criteria related to chainsaw kickback. STIHL has developed a color code system using green and yellow to help you select a powerhead, bar and chain combination that complies with the kickback requirements of the ANSI Standard. See the sections entitled "Safety Precautions" and "Specifications" of this manual. Do not rely exclusively upon the safety devices built into your saw. As a chainsaw user, you should take several steps to keep your cutting jobs free from accident or injury. 1. With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Sudden surprise contributes to accidents. 2. Keep a good firm grip on the saw with both hands, the right hand on the rear handle, and the left hand on the front handle, when the engine is running. Use a firm grip with thumbs and fingers encircling the chainsaw handles. A firm grip will help you reduce kickback and maintain control of the saw. Don't let go. 3. Make sure the area in which you are cutting is free from obstructions. Do not let the nose of the guide bar contact a log, branch, or any other obstruction that could be hit while you are operating the saw. 4. Cut at high engine speeds. 5. Do not overreach or cut above shoulder height. 6. Follow manufacturer's sharpening and maintenance instructions for the saw chain. 7. Only use replacement bars and chains specified by the manufacturer or the equivalent. 8. Reduced kickback bars and low kickback chains are designed to reduce the risk of kickback injury. Ask your STIHL dealer about these devices. B. Other Safety Precautions !Warning! 1. Do not operate a chainsaw with one hand! Serious injury to the operator, helpers, bystanders, or any combination of these persons may result from one-handed operation. A chainsaw is intended to be used with two hands. 2. Do not operate a chainsaw when you are fatigued. 3. Use safety footwear; snug-fitting clothing; protective gloves; and eye, hearing, and head protection devices. Some Important Safety Precautions for Chain Saw Users

4 English / USA MS 170, MS 180, MS 180 C 4. Use caution when handling fuel. Move the chainsaw at least 10 feet (3 m) from the fueling point before starting the engine. 5. Do not allow other persons to be near the chainsaw when starting or cutting with the chainsaw. Keep bystanders and animals out of the work area. 6. Do not start cutting until you have a clear work area, secure footing, and a planned retreat path from the falling tree. 7. Keep all parts of your body away from the saw chain when the engine is running. 8. Before you start the engine, make sure that the saw chain is not contacting anything. 9. Carry the chainsaw with the engine stopped, the guide bar and saw chain to the rear, and the muffler away from your body. 10. Do not operate a chainsaw that is damaged, improperly adjusted, or not completely and securely assembled. Be sure that the saw chain stops moving when the throttle trigger is released. 11. Shut off the engine before setting the chainsaw down. 12. Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance. 13. When cutting a limb that is under tension be alert for springback so that you will not be struck when the tension in the wood fibers is released. 14. Keep the handles dry, clean, and free of oil or fuel mixture. 15. Operate the chainsaw only in well- ventilated areas. 16. Do not operate a chainsaw in a tree unless you have been specifically trained to do so. 17. All chainsaw service, other than the items listed in the Owner's Manual maintenance instructions, should be performed by competent chainsaw service personnel.(For example, if improper tools are used to remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur and could subsequently cause the flywheel to burst). 18. When transporting your chainsaw, use the appropriate chain guard (scabbard). Other important safety precautions are contained in the body of the Owner's Manual, especially in the Safety Precautions. Note: When using a chainsaw for logging purposes, refer to the Code of Federal Regulations, Parts 1910 and 1928.

5 MS 170, MS 180, MS 180 C English / USA Chainsaws equipped with Easy2Start* can be started with less effort at a lower cranking speed. The following instructions must be observed: : Keep children well away from the machine – even small children could start the saw. : Hold the saw firmly by the front handle during the entire starting procedure : To help prevent the engine starting unintentionally when the saw is not in use, always move the Master Control to the stop position and engage the chain brake. Protect the machine from unauthorized use (e.g. children). See also chapter on "Starting / Stopping the Engine". * Special option The use of any chainsaw may be hazardous. The saw chain has many sharp cutters. If the cutters contact your flesh, they will cut you, even if the chain is not moving. At full throttle, the chain speed can reach 45 mph (20 m/s). It is important that you read, fully understand and observe the following safety precautions and warnings. Read the Owner's Manual and the Safety Precautions periodically. Pay special attention to the section on reactive forces. !Warning! Reactive forces, including kickback, can be dangerous. Careless or improper use of any chainsaw may cause serious or fatal injury. All safety precautions that are generally observed when working with an axe or a hand saw also apply to the operation of chainsaws. However, because a chainsaw is a high-speed, fast-cutting power tool, special safety precautions must be observed to reduce the risk of personal injury. Have your STIHL dealer show you how to operate your chainsaw. Observe all applicable local safety regulations, standards and ordinances. !Warning! Minors should never be allowed to use a chainsaw. Bystanders, especially children, and animals should not be allowed in the area where a chainsaw is in use. Never let the saw run unattended. Store it in a locked place away from children and empty the fuel tank before storing for longer than a few days. Do not lend or rent your chainsaw without the Owner`s Manual. Be sure that anyone using your saw reads and understands the information contained in this manual. These safety precautions and warnings apply to the use of all STIHL chainsaws. Different models may have different parts and controls. See the appropriate section of your Owner's Manual for a description of the controls and function of the parts of your model saw. Easy2Start Safety Precautions

6 English / USA MS 170, MS 180, MS 180 C Safe use of a chainsaw involves 1. the operator 2. the saw 3. the use of the saw. THE OPERATOR Physical Condition You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol) which might impair vision, dexterity or judgement. Do not operate a chainsaw when you are fatigued. Be alert - If you get tired while operating your chainsaw, take a break. Tiredness may result in loss of control. Working with any chainsaw can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a chainsaw. !Warning! Prolonged use of chainsaws (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis. All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following: – Many STIHL models are available with an anti-vibration (AV) system designed to reduce the transmission of vibrations created by the engine and cutting attachment to the operator's hands. An AV system is recommended for those persons using chainsaws on a regular or sustained basis. – Wear gloves and keep your hands warm. Heated handles, which are available on most STIHL power- heads, are recommended for cold weather use. – Keep the saw chain sharp and the saw, including the AV system, well maintained. A dull chain will in- crease cutting time, and pressing a dull chain through wood will in- crease the vibrations transmitted to your hands. A saw with loose components or with damaged or worn AV buffers will also tend to have higher vibration levels. – Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressures. 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 monitor closely the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately. !Warning! The ignition system of your 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 pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.

7 MS 170, MS 180, MS 180 C English / USA Proper Clothing !Warning! To reduce the risk of injury, the operator should wear proper protective apparel. Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Avoid loose- fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become entangled with the saw or brush. Wear overalls or jeans with a reinforced cut retardant insert or cut retardant chaps. Protect your hands with gloves when handling saw and saw chain. Heavy-duty, nonslip gloves improve your grip and protect your hands. Good footing is most important in chainsaw work. Wear sturdy boots with nonslip soles. Steel- toed safety boots are recommended. Never operate a chainsaw unless wearing goggles or properly fitted safety glasses with adequate top and side protection complying with your national standard. Wear an approved safety hard hat to protect your head. Chainsaw noise may damage your hearing. Always wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly. THE SAW Parts of the chainsaw; for illustrations and definitions of the parts see the chapter on "Main Parts of Saw". !Warning! Never modify a chainsaw in any way. Only attachments and parts supplied by STIHL or expressly approved by STIHL for use with the specific STIHL saw models are authorized. Although certain unauthorized attachments are usable with the STIHL powerhead, their use may, in fact, be extremely dangerous. THE USE OF THE SAW Transporting the chainsaw !Warning! Always stop the engine before putting a chainsaw down or carrying it. Carrying a chainsaw with the engine running is extremely dangerous. Accidental acceleration of the engine can cause the chain to rotate. During operation, the powerhead muffler and the material around it reach extremely high temperatures. Avoid touching the hot muffler, you could receive serious burns. By hand: When carrying your saw by hand, the engine must be stopped and the saw must be in the proper position. Grip the front handle and place the muffler away from the body.

8 English / USA MS 170, MS 180, MS 180 C The chain guard (scabbard) should be over the chain and the guide bar, which should point backwards. When carrying your saw, the bar should be behind you. By vehicle: When transporting in a vehicle, keep chain and bar covered with the chain guard. Properly secure your saw to prevent turnover, fuel spillage and damage to the saw or vehicle. Preparation for the use of the saw Take off the chain guard and inspect for safety in operation. For assembly, follow the procedure described in the chapter "Mounting the Bar and Chain" of your Owner's Manual. STIHL Oilomatic chain, guide bar and sprocket must match each other in gauge and pitch. Before replacing any bar and chain, see the sections on "Specifications", "Kickback" and the "ANSI B 175.1-2000 chainsaw kickback standard" in this manual. !Warning! Proper tension of the chain is extremely important. In order to avoid improper setting, the tensioning procedure must be followed as described in your manual. Always make sure the hexagonal nut(s) for the sprocket cover is (are) tightened securely after tensioning the chain. Never start the saw with the sprocket cover loose. Check chain tension once more after having tightened the nut(s) and thereafter at regular intervals (whenever the saw is shut off). If the chain becomes loose while cutting, shut off the engine and then tighten. Never try to adjust the chain while the engine is running! Fueling Your STIHL chainsaw uses an oil-gasoline mixture for fuel (see chapter "Fuel" of your Owner's Manual). !Warning! Gasoline is an extremely flammable fuel. If spilled or ignited by a spark or other ignition source, it can cause fire and serious burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the chainsaw. Note that combustible fuel vapors may be vented from the fuel system. Fueling Instructions !Warning! Fuel your chainsaw in well-ventilated areas, outdoors only. Always shut off the engine and allow it to cool before refueling. Gasoline vapor pressure may build up inside the gas tank depending on the fuel used, the weather conditions, and the venting system of the tank. In order to reduce the risk of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap on the STIHL product carefully so as to allow any pressure build-up in the tank to release slowly. Never remove fuel filler cap while engine is running. Select bare ground for fueling and move at least 10 feet (3 m) from fueling spot before starting the engine. Wipe off any spilled fuel before starting your saw, and check for leakage. 001BA115 KN

9 MS 170, MS 180, MS 180 C English / USA !Warning! Check for fuel leakage while refueling and during operation. If fuel or oil leakage is found, do not start or run the engine until leak is fixed and spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately. Different models may have different fuel caps. Cap with Grip !Warning! In order to reduce the risk of fuel spillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening. 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 triangular marks on the grip of the cap and on the fuel tank opening lining up. Using the grip, turn the cap firmly clockwise as far as it will go (approx. a quarter turn). Fold the grip flush with the top of the cap. If the grip does not lie completely flush with the cap and the detent on the grip does not fit in the corresponding recess in the filler neck, the cap is not properly seated and tightened and you must repeat the above steps. Slotted Cap !Warning! Unit vibrations can cause an improperly tightened fuel filler cap to loosen or come off and spill quantities of fuel. In order to reduce the risk of fuel spillage and fire, tighten fuel filler cap by hand with as much force as possible. The screwdriver end of the STIHL combination wrench or other similar tool can be used as an aid in tightening slotted fuel filler caps. See "Fueling" chapter in your Owner's Manual. Starting The chain brake must be engaged when starting the saw. !Warning! Your chainsaw is a one-person saw. Do not allow other persons to be near the running chainsaw. Start and operate your saw without assistance. For specific starting instructions, see the appropriate section of the Owner's Manual. Proper starting methods reduce the risk of injury. Do not drop start. This method is very dangerous because you may lose control of the saw. There are two recommended methods for starting your chainsaw. With the first recommended method, the chainsaw is started on the ground. Make sure the chain brake is engaged (see "Chain Brake" chapter in your Owner's Manual) and place the chainsaw on firm ground or other solid surface in an open area. Maintain good balance and secure footing. 001BA113 KN

Stihl MS170-MS180 Service/Shop Repair Manual

You're Reading a Preview

Recently Viewed