STIHL 019 T
Contents
1. Hold the starter grip firmly to keep Remove the fan housing see 6 2 the rope tensioned Remove the starter rope from the Let go of the rope rotor and slowly rotor see General Servicing release the starter grip so that the Troubleshooting handbook rope winds onto the rotor Make a loop in the starter rope e Grip the rope close to the rotor Note The rewind spring is correctly Ease the cap out of the starter and use it to turn the rope rotor six tensioned when the starter grip sits grip full turns clockwise firmly in the rope guide bush without drooping to one side If this is not the Pull the rope out of the starter case tension the spring by one grip additional turn When the starter rope is fully extended it must still be possible to rotate the rope rotor at least another half turn before maximum spring tension is reached If this is not the case pull the rope out hold the rope rotor steady and take off one turn of the rope Do not overtension the rewind spring it might break Refit the fan housing see 6 2 e Hold the rope rotor steady e Thread end of new rope through the underside of the starter grip e Pull out the rope with the starter grip and straighten it out Secure end of rope it with a simple overhand knot STIHL 019 T 32 6 5 Starter Grip ElastoStart The starter grip is supplied complete with starter rope Remove the fan housing see 6 2 Remove the2. Remove the engine see 4 1 Take out the screws Remove the muffler Reassemble in the reverse sequence Tighten screws to 7 0 Nm 5 2 Ibf ft Install the engine see 4 2 14 4 4 Leakage Test Defective oil seals diaphragms and gaskets or cracks in castings or the spacer flange cause leaks Such faults allow supplementary air to enter the engine and thus upset the fuel air mixture This makes adjustment of the prescribed idle speed difficult if not impossible Moreover the transition from idle speed to part or full throttle is not smooth The engine housing can be checked thoroughly for leaks with the carburetor and crankcase tester and the vacuum pump STIHL 019 T 4 4 1 Preparations Remove the carburetor see 1 0 5 2 Set the piston to top dead center T D C This can be checked through the spark plug hole Remove the air baffle see 10 6 e Fit the spark plug and tighten down to 25 Nm 18 5 Ibf ft e Fit the sealing plate 1 0000 855 8106 between muffler and cylinder Note The sealing plate must completely cover the exhaust port Tighten the screws moderately Important Do not overtighten the screws since the sealing plate may otherwise be damaged e Back off muffler mounting screws halfway Fit new gasket on spacer flange 15 4 4 2 Pressure Test 170RA061 VA e Use carburetor screws 2 to Connect pressure hose o
3. Connect suction hose of vacuum pump 0000 850 35071 to test flange nipple STIHL 019 T e Close the vent screw 1 on the pump Operate lever 2 until pressure gauge 3 indicates a vacuum of 0 4 bar 5 8 psi Note If the vacuum reading remains constant or rises to no more than 0 3 bar 4 25 psi within 20 seconds it can be assumed that the spacer flange and the diaphragm are in good condition However if the pressure continues to rise the spacer flange or the diaphragm must be replaced After finishing the test open the vent screw Carry out vacuum test for oil seals see 4 4 4 4 4 4 Vacuum Test for oil seal Oil seals tend to fail when subjected to a vacuum i e the sealing lip lifts away from the crankshaft during the piston s induction stroke because there is no internal counterpressure An additional test can be carried out with the vacuum pump to detect this kind of fault e Take out the screws 1 e Remove the test flange 2 and gasket e Take out the screws 1 e Remove the spacer flange 2 and gasket 17 e Take out the screw 1 e Remove the support plate 2 Fit test flange with suction hose of Remove the spacer flange vacuum pump 0000 850 35071 to the spacer flange Fit the diaphragm and support plate see 10 7 Fit the spacer flange see 10 7 Loosen muffler mounting screws Take out the sealing plate and tighten the s
4. Remove the grommet STIHL 019 T 12 4 2 Assembly e Take out screws from underside of e Check that grommet is properly e Place throttle cable in the engine seated in the engine housing grommet Fit top and bottom engine mounting screws and torque down to 8 0 Nm 5 9 Ibf ft OR A048 VA 171 e Remove engine sideways from e Throttle cable sleeve must locate in e Push grommet ledge facing up housing retainer in air baffle over the lugs of the intake pipe e Fit engine and position throttle e Push grommet with intake pipe into cable in the handle at the same the engine housing until the ledge time butts against the engine housing Push throttle cable into retainer in handle STIHL 019 T 13 170RA037 VA e Fit the intake pipe 1 in the intake casing 2 170RA051 VA e Fit the short circuit and ground wires pull them downward and out of handle as far as possible in the grommet and close the grommet Connect short circuit and ground wires to ignition module Fit throttle trigger see 8 1 Fit the worm with drive spring in position Install the clutch see 3 2 STIHL 019 T 4 3 Exhaust Muffler Spark Arresting Screen Spark arresting screen Take out the screw 170RA053 VA e Remove the cover plate lt gt 3 6 lt T S e Remove the spark arresting screen Clean the spark arresting screen or fit a new one if necessary Muffler
5. insert the screws but do not tighten them down yet e Secure the ground wire 1 with the upper mounting screw e Slide the setting gauge 2 1111 890 6400 between the arms of the ignition module and the flywheel magnets Press the ignition module against the flywheel and tighten down the mounting screws to a torque of 4 5 Nm 3 3 Ibf ft Push the short circuit wire on to the connector tag Fit boot on spark plug Fit the fan housing see 6 2 STIHL 019 T 5 3 Flywheel Removing the flywheel Remove the fan housing see 6 2 e Pull off the spark plug boot 1 and unscrew the spark plug 2 T70RA109 VA 170RA110 VA e Pull the flywheel off the crank shaft e Fit locking strip 1 0000 893 5903 in cylinder e Unscrew the flywheel nut z gt fe i Note If the flywheel cannot be pulled off by hand screw the puller 1 4133 893 0800 on to the crankshaft stub Free off the flywheel by lightly tapping the end of the puller Unscrew the puller and remove the flywheel 27 5 4 Ground Wire Short Circuit Wire Inspect the condition of the flywheel 1 and magnets 2 If you find any damage e g cracks broken fan blades fit a new flywheel Installing the flywheel Important Clean the stub of the crankshaft and the flywheel hub bore with a standard commercial solvent based degreasant containing no chlorinated or halogenated hydrocarbons see 11 2 Fi
6. also check and clean the tank vent see 10 3 The carburetor can be tested for leaks with the carburetor and crankcase tester 1106 850 2905 Remove the fuel tank see 10 4 143RA172 VA e Push the fuel line 1 1110 141 8600 onto the nipple 2 0000 855 9200 s 2 lt e Push fuel line with nipple onto carburetor elbow connector STIHL 019 T 170RA206 VA e Push the nipple into the tester s pressure hose 170RA207 VA e Close the vent screw 1 on the rubber bulb 2 and pump air into the carburetor until the pressure gauge shows a reading of approx 0 4 bar 5 8 psi If this pressure remains constant the carburetor is airtight However if it drops there are two possible causes 1 The inlet needle is not sealing foreign matter in valve seat or sealing cone of inlet needle is damaged or inlet control lever sticking 2 The metering diaphragm is damaged In either case the carburetor must be removed and serviced see Carburetor handbook After completing test open the vent screw and pull the fuel line off the elbow connector Install the fuel tank see 10 4 44 10 5 2 Removing and Installing 170RA208 VA Remove the fuel tank see 10 4 Take out the screws e Pull off the intake casing and carburetor Take out the screws e Remove the intake casing and pull the choke rod out of the choke shaft at the same time STIHL 019
7. DRIVE CHAIN BRAKE AND CHAIN TENSIONER 3 1 Chain Sprocket 145RA294 VA 170RA002 VA e Unscrew the nut e Take the needle cage out of the If the clutch drum is still serviceable sprocket use No 120 emery paper or emery Pull off the chain sprocket cover cloth grain size approx 120um to Clean and inspect the chain clean and roughen its friction Disengage the chain brake by sprocket surface pulling the hand guard toward the front handle Reassemble in the reverse sequence Clean stub of crankshaft Wash needle cage in clean white spirit and lubricate with grease see 11 2 Replace damaged needle cage Rotate chain sprocket and apply slight pressure at the same same until oil pump drive spring engages properly e Remove the E clip 1 Important If there are noticeable wear marks on the inside diameter of e Remove the washer 2 the clutch drum check its wall thickness If it is less than 80 of the original wall thickness fit a new sprocket Note If the clutch drum has to be replaced also check the brake band see 3 3 2 e Pull off the chain sprocket STIHL 019 T 3 2 Clutch Troubleshooting chart see Standard Repairs Troubleshooting handbook Remove chain sprocket see 3 1 e Pull boot 1 off the spark plug Unscrew the spark plug 2 e Push the locking strip 1 0000 893 5903 into the cylinder STIHL 019 T Unscrew the clutch from the cra
8. element 2 3 Ignition System 2 4 Cutting Attachment 2 5 Special Accessories 2 5 1 For User 2 5 2 For Service STIHL 019 T Type Air gap Ignition timing Spark plug Suppressed Electrode gap Spark plug thread Length of thread Oilomatic chain Chain sprocket Chain speed Chain lubrication Oil delivery rate Oil tank capacity STIHL repair kit 6 tooth 3 8 P spur sprocket 8 tooth 1 4 spur sprocket ElastoStart Carburetor parts kit Electronic magneto ignition breakerless with integral trigger unit 0 25 mm 0 010 in 1 6 2 3 mm 0 063 0 091 in B T D C at 8 000 rpm NGK BPMR 7 Aor CHAMPION RCJ6Y 0 5 mm 0 02 in M14x1 25 9 5 mm 0 37 in 9 32 mm 3 8 Picco Micro Mini 7 tooth 3 8 P spur sprocket 21 7 m s 71 2 ft sec at 10 000 rpm Speed controlled reciprocating oil pump No oil feed at idle speed Adjustable 5 9 cm min 0 17 0 30 fl oz min 0 16 0 34 US pt 1132 900 5000 1123 640 2005 1123 640 2010 0000 190 3400 1132 007 1060 2 6 Tightening Torques Plastoform screws are used for polymer components and DG screws for lightmetal components These screws form a permanent thread when they are installed for the first time They can be removed and installed as often as necessary without detrimentally affecting the strength of the screwed assembly providing the specified tightening torque is observed For this reason it is essential to use a torque wrenc
9. of the hand guard e Take out the flat spring Inspect parts Replace any worn or damaged parts STIHL 019 T Clean chain brake seat in If the groove of the brake spring anchor pin is worn replace the 3 3 3 Assembly Lubricate sliding and bearing points of chain brake with STIHL multipurpose grease or preferably Molykote grease see 11 2 Fit flat spring in position e Slide bell crank into end of hand guard The short arm of the bell crank must point to top of hand guard e Locate bearing boss of hand guard 1 on pivot pin Fit other end over the housing e Position bell crank 1 against e Place strap on pivot pin 1 and Attach brake band to the bell pivot pin 2 pull it in direction of arrow until it crank engages the groove Push hand guard and bell crank fully onto the pivot pins e Then push it over the pivot pin 2 170RA027 VA e Check that flat spring 1 e Secure strap with E clip Fit the brake band and press it is properly located on face 2 into the engine housing of bearing boss Coat brake band with chain oil STIHL Bioplus see 11 2 to protect it from corrosion an cushion snatching during the first few brake applications e Fit the washer e Hook the brake spring onto the bell crank STIHL 019 T 10 3 4 Chain Tensioner 3 5 Bar Stud e Use the assembly tool 2 Remove the chain sprocket cover Remove the chain sproc
10. piston out of the cylinder engine pan mating face see 11 2 Inspect ball bearings and oil seals Note Follow manufacturer s and replace if necessary see 4 9 instructions for use of sealant STIHL 019 T 21 Fit the engine pan so that the seat 1 for the oil pump is at the same side as the long crankshaft stub 2 Insert screws and torque down to 8 0 Nm 5 9 Ibf ft Fit the spacer flange see 10 7 Fit the air baffle Install the flywheel see 5 3 Install and adjust the ignition module see 5 2 Install the carburetor see 10 5 2 Install the muffler see 4 3 Install the engine see 4 2 STIHL 019 T 4 7 Piston Pull the piston out of the cylinder e Inspect piston ring and replace if see 4 6 necessary see 4 8 e Ease the hookless snap rings out of Oil needle cage in the small end the grooves in the piston bosses e Use the assembly drift 2 To ease assembly heat the 1130 893 4700 to push the piston piston slightly and push it over pin 1 out of the piston the connecting rod Note If the piston pin is stuck tap the e Installed position of piston end of the drift lightly with a hammer Important Hold the piston steady 1 Arrow during this process to ensure that no 2 Long stub of crankshaft jolts are transmitted to the connecting rod Remove the piston from the connecting rod e Push the assembly drift small diameter first through the piston and sma
11. position and fit throttle cable in throttle trigger at the same time Check that it has engaged properly Install the flywheel see 5 3 Install the engine see 4 2 4 6 Cylinder Remove the muffler see 4 3 Remove the carburetor see 10 5 2 e Take out the screw 1 e Remove the ignition module 2 e Remove the flywheel 1 see 5 3 e Remove the air baffle 2 20 Inspect the cylinder and replace it if necessary If a new cylinder has to be installed always fit the matching piston Replacement cylinders are only supplied complete with piston for this reason Thoroughly clean all residue of sealant from the cylinder and engine pan mating faces Lubricate piston and piston ring e Slide piston carefully into the with oil cylinder e Take out the screws 1 e Remove the spacer flange 2 Note The piston ring is com pressed by the inner taper of the cylinder e Take out the screws e Position the piston ring so that the e Line up the crankshaft so that the radii at the ring gap meet at the long crankshaft stub 1 is on the Pull the engine pan off the fixing pin in the piston groove when same side as the exhaust port 2 cylinder the ring is compressed Push piston home until ball bearings Apply a thin coating of sealant to are seated the outer diameters of the oil seals see 11 2 e Lift the crankshaft and pull the Apply a thin bead of sealant to the
12. properly in the engine outwards at the same time this housing opening 3 pulls the taper into the oil tank e Coat taper 4 with a little oil Note Avoid stretching the suction hose PS Place the pickup body in the oil tank J Install the engine see 4 2 JE Push the thrust piece 1 1132 893 8700 over the threaded rod as far as it will go Fit M5 nut e Fit pickup body with suction hose in Tighten down the nut until the oil oil tank opening pump comes out of the engine housing STIHL 019 T 40 9 4 Worm e Unscrew the oil pump 1 from the threaded rod 2 e Position the thrust piece 1 1132 893 8700 in the housing bore from the inside e Pull the thrust piece 3 off the threaded rod Installation e Screw the hex head screw 1 9008 319 1450 into the thrust e Place the oil pump in position so that piece the left edge 1 of the groove lines up with the left edge 2 of the mark e Continue tightening the hex head screw until the press arbor 2 butts against the housing 3 Take out the hex head screw Remove the thrust piece and press arbor Install the oil tank see 9 2 e Fit press arbor 1 1132 893 7200 in the oil pump 2 STIHL 019 T Remove the clutch see 3 2 Pull off the worm with drive spring e Take the drive spring off the worm Reassemble in the reverse sequence 41 10 FUEL SYSTEM 10 1 Air Filter Dirty a
13. 4 36 36 37 37 37 39 39 39 40 10 Fuel System 10 1 Air Filter 10 2 Pickup Body 10 3 Tank Vent 10 4 Fuel Tank Fuel Hose 10 5 Carburetor 10 5 1 Leakage Test 10 5 2 Removing and Installing 10 5 3 Adjustment 10 6 Throttle Cable 10 7 Spacer Flange Diaphragm 11 Special Servicing Tools and Aids 11 1 Special Servicing Tools 11 2 Servicing Aids STIHL 1996 Andreas Stihl Waiblingen 42 42 42 43 43 44 44 45 45 46 47 48 48 50 1 INTRODUCTION This service manual contains detailed descriptions of all the repair and servicing procedures specific to this series of chainsaws There are separate handbooks for servicing procedures on standardized parts and assemblies that are installed in several STIHL power tool models Reference is made to these handbooks in the appropriate chapters of this manual You should make use of the illustrated parts lists while carrying out repair work They show the installed positions of the individual components and assemblies Always use the latest edition of the parts list to determine the part numbers of any replacement parts required Microfilmed parts list are always more up to date than printed lists A fault on the machine may have several causes Consult the troubleshooting charts for all assemblies in the Standard Repairs Troubleshooting handbook Refer to the Technical Information bulletins for engineering changes which have been in
14. 6 3 1 Replacing Troubleshooting chart see General Servicing Troubleshooting handbook Remove the fan housing see 6 2 Remove the rope rotor see General Servicing Troubleshooting handbook use pliers to remove any remaining pieces of spring from the fan housing Note The replacement spring comes ready for installation and is held together by a wire retainer It should be lubricated with a few drops of STIHL special lubricant before installation see 11 2 The wire retainer slips off as the rewind spring is pressed into the fan housing e Engage the anchor loop over the lug in the fan housing STIHL 019 T Caution The rewind spring may pop out and uncoil during installation If the rewind spring has popped out refit it as follows e Position anchor loop about 11 mm 0 4 dimension a from the edge of the assembly tool 1 1116 893 4800 e Fit the rewind spring in the assembly tool in the counterclockwise direction starting outside and working inwards The wooden assembly block can be placed over the assembly tool to simplify this operation Slip the assembly tool with rewind spring over the starter post e Push the rewind spring into the fan housing and then remove the assembly tool Install the rope rotor see General Servicing Trouble shooting handbook Tension the rewind spring see 6 3 2 31 6 3 2 Tensioning 6 4 Starter Rope ElastoStart
15. CONTENTS 2 1 2 2 2 3 2 5 2 5 1 2 5 2 2 6 3 1 3 2 3 3 3 3 1 3 3 2 3 3 3 3 4 3 5 4 1 4 2 4 3 44 4 4 1 4 4 2 4 4 3 4 4 4 Introduction Specifications Engine Fuel System Ignition System Cutting Attachment Special Accessories For User For Service Tightening Torques Clutch Chain Drive Chain Brake and Chain Tensioner Chain Sprocket Clutch Chain Brake Checking Function Disassembly Assembly Chain Tensioner Bar Stud Engine Removal Assembly Exhaust Muffler Spark Arresting Screen Leakage Test Preparations Pressure Test Vacuum Test for diaphragm Vacuum Test for oil seal Oil Seals Cylinder Piston Piston Ring Crankshaft STIHL 019 T arhRRRRWW O art OONNNO i N 5 1 5 2 1 522 5 3 5 4 5 5 6 1 6 2 6 3 1 6 3 2 6 4 6 5 8 1 8 2 8 3 8 4 8 5 9 1 9 2 9 3 Ignition System Spark Plug Boot Ignition Module Ignition Timing Removing and Installing Flywheel Ground Wire Short Circuit Wire Contact Spring Rewind Starter General Fan Housing Rewind Spring Replacing Tensioning Starter Rope ElastoStart Starter Grip ElastoStart AV Handle System Master Control Handle System Interlock Lever Throttle Trigger Switch Shaft Handle Molding Handlebar Top Handle Chain Lubrication Pickup Body Oil Tank Suction Hose Oil Pump Worm 25 25 26 26 27 28 29 30 30 30 31 32 32 33 3
16. Pickup body e Use the assembly hook 1 5910 893 8800 to pull the pickup body out of the fuel tank Note Do not stretch the fuel hose while removing it e Pull the pickup body off the fuel hose Fit a new pickup body Reassemble in the reverse sequence Position pickup body so that it faces forward in the front corner bar side STIHL 019 T 10 3 Tank Vent Correct operation of the carburetor is only possible if atmospheric pressure and internal fuel tank pressure are equal at all times This is ensured by the tank vent Important In the event of trouble with the carburetor or the fuel supply system always check and clean the tank vent Remove the engine see 4 1 lt gt lt T R Equalization of pressure from the outside inwards takes place via the valve Note Valve opening must be clear and clean Install the engine see 4 2 10 4 Fuel Tank Fuel Hose Remove the engine see 4 1 Pull fuel hose off carburetor elbow connector Remove the fuel tank Pull the pickup body off the fuel hose 170RA204 VA e Pry the grommet 1 out of the fuel tank e Pull out the fuel hose 2 e Pull out the valve 3 Install in the reverse sequence 43 10 5 10 5 1 Carburetor Leakage Test Troubleshooting chart see General Servicing Troubleshooting handbook Important In the event of trouble with the carburetor or the fuel supply system
17. T 170RA143 VA e Remove the gasket Install in the reverse sequence Fit a new gasket Attach the throttle cable to the throttle shaft Tighten down screws to 5 0 Nm 3 7 Ibf ft 10 5 3 Adjustment Standard setting To readjust the carburetor start with the standard setting Carefully screw down both adjusting screws until they are hard against their seats Then make the following adjustments H Open high speed screw 1 1 full turn L Open low speed screw 2 1 full turn A slight correction may be necessary if the saw is used at high altitudes mountains or at sea level For corrections to high speed screw H Use a tachometer do not exceed max permissible engine speed Engine can be damaged by lack of lubricant and overheating Maximum engine speed with bar and properly tensioned chain 12 000 rpm Note If no tachometer is available do not turn the high speed or low speed screws beyond the standard setting to make the mixture leaner 45 Check chain tension and correct as necessary Check air filter and clean if necessary Start the saw warm up the engine Adjust idle speed correctly chain must not rotate Turn high speed screw H clockwise for leaner mixture at high altitudes or counterclockwise for richer mixture at sea level Turn screws very slowly and carefully even slight adjustments produce a noticeable change in engine runn
18. ad HTR 10 m 33 5 Electrician s repair kit 6 Dirko sealant 100 g 3 5 oz 7 Graphite grease 8 Molykote grease 9 STIHL Bioplus 1 1 2 US pt bottle STIHL 019 T 0781 120 1111 0781 417 1315 0000 930 2251 0000 007 1013 0783 830 2120 0781 516 3331 Application Oil seals oil pump drive chain sprocket bearing chain tensioner Cleaning crankshaft stub Bearing bore in rope rotor rewind spring in fan housing Engine pan outside diameter of oil seals Peg on starter pawl Sliding and pivot points of brake band Corrosion protection for brake band 50
19. ation Rem Blocking crankshaft Installing oil seal Guiding press sleeve starter side Removing oil seals Removing flywheel Attaching connectors to electrical wires Removing and installing piston pin Testing crankcase for leaks Testing crankcase for leaks Sealing exhaust port for leakage test For leakage test Setting air gap between ignition module and flywheel Removing clutch and flywheel nut 0 5 to 18 Nm 0 325 to 13 5 Ibf ft 6 to 80 Nm 4 5 to 60 Ibf ft hDOAN i aN IS screws Removing pickup bodies Removing and fitting the brake spring Installing rewind spring Removing and installing bar mounting stud 48 No 24 25 26 27 28 29 30 Part Name Service tool Threaded rod Thrust piece Press arbor Hex head screw T handle screwdriver QI T27x150 Assembly stand Remarks 1132 890 1700 1132 893 8200 1132 893 8700 1132 893 7200 9008 319 1450 5910 890 2400 5910 890 3100 1 Always use torque wrench to tighten Plastoform and DG screws 2 Wrench has optical acoustic signal 3 On DG and P screws use for releasing only STIHL 019 T Application Removing and installing oil pump For all IS screws Holding saw for repairs Rem 49 11 2 Servicing Aids 1 Lubricating grease 370 g 13 oz tube 2 Standard commercial solvent based degreasant without chlorinated or halogenated hydrocarbons 3 STIHL special lubricant 4 Ignition le
20. crews to 7 0 Nm 5 2 Ibf ft Install the carburetor see 10 5 2 e Remove the diaphragm 2 8 lt g e Check that gasket is in good condition or fit new one if necessary Fit spacer flange insert screws and tighten down to 8 0 Nm 5 9 Ibf ft STIHL 019 T e Close the vent screw 1 on the pump e Operate lever 2 until pressure gauge 3 indicates a vacuum of 0 4 bar 5 8 psi Note If the vacuum reading remains constant or rises to no more than 0 3 bar 4 25 psi within 20 seconds it can be assumed that the oil seals are in good condition However if the pressure continues to rise the oil seals must be replaced After finishing the test open the vent screw and disconnect the hose Remove the test flange 18 4 5 Oil Seals It is not necessary to disassemble the Important Take special care not to Thinly coat the outside diameter of engine to replace the oil seals damage crankshaft stub the oil seal with sealant see 11 2 Remove the fuel tank see 10 4 Position the oil seal so that the clamping ring faces upwards Clutch side e If an oil seal with clamping ring e Use the press sleeve 1 1 is installed use puller and 1123 893 2400 to install the oil e Pry out the retaining ring No 3 1 jaws to remove the clamping seal ring Pry the sealing ring 2 out of the housing Fit a new retaining ring in the crankshaft groove Clean sealing face on cranks
21. f tester e However if the indicated pressure mount the test flange 1 1106 850 2905 to nipple on test drops the leak must be located and 1128 850 4200 to spacer flange the faulty part replaced flange Note To find the leak coat the suspect area with oil and pressurize the engine housing again Bubbles will appear if a leak exists Carry out the vacuum test see 4 4 3 and 4 4 4 After finishing the test open the vent screw and disconnect the hose Remove the test flange Loosen muffler mounting screws Take out the sealing plate and tighten the screws to 7 0 Nm 5 2 Ibf ft Install the carburetor see 10 5 2 e Close the vent screw 1 on the rubber bulb Continue squeezing rubber bulb until the gauge indicates a pressure of 0 5 bar 7 25 psi If this pressure remains constant for at least 20 seconds the engine housing is airtight STIHL 019 T 16 4 4 3 Vacuum Test for diaphragm In these chainsaws the fuel air mixture is sucked into the crankcase via a diaphragm valve This valve closes to prevent the gas mixture flowing back into the carburetor If the diaphragm seating face on the spacer flange is dirty or the diaphragm is fatigued or faulty the mixture may flow back and result in an irregular running behavior A test can be carried out with the vacuum pump to detect this kind of fault The preparations for this test are the same as for the pressure test see 4 4 1
22. h Fastener Thread For component Torque Remarks size Nm lbf ft Spline screw IS DG 4x20 Ignition module cylinder 45 3 3 Spline screw IS DG 5x24 Handle molding front handle 3 5 2 6 Spline screw IS DG 5x24 Fan housing engine housing 4 0 3 0 Spline screw IS DG 5x24 Engine pan cylinder 8 0 5 9 Spline screw IS DG 5x24 Handle molding handle 4 0 3 0 Spline screw IS DG 5x24 Muffler cylinder 7 0 5 2 Spline screw IS DG 5x24 Spacer flange cylinder 8 0 5 9 Spline screw IS DG 5x24 Engine housing cylinder 8 0 5 9 Collar screw IS DG 8x18 Bar mounting engine housing 16 0 11 8 Spline screw IS M5x52 Intake casing carburetor flange 5 0 3 7 Collar nut M8x1 Flywheel 28 0 21 0 M12x1 L Clutch 50 0 37 0 M14x1 25 Spark plug 25 0 18 5 Plastoform screw IS P4x12 Hand guard left fan housing 1 7 1 3 Screw IS DG 3 5x12 Support plate diaphragm spacer flange 2 0 1 5 Use the following procedure when refitting a P or DG screw in an existing thread Place the screw in the hole and rotate it counterclockwise until it drops down slightly Tighten the screw clockwise to the specified torque This procedure ensures that the screw engages properly in the existing thread and does not form a new thread and weaken the joint Note Power screwdriver speed for use in polymer Plastoform screws max 600 rpm DG screws max 500 rpm Use only screws specified in parts list Do not use screws with underhead locking teeth on polymer components STIHL 019 T 3 CLUTCH CHAIN
23. haft stub with standard commercial solvent Fit the fuel tank based degreasant containing no chlorinated or halogenated hydrocarbons see 11 2 Note If the cylinder and engine pan are assembled only oil seals 9638 003 1581 with clamping ring may be installed Lubricate sealing lips of oil seal with grease see 11 2 e Apply puller 1 5910 890 4400 Starter side jaws 0000 893 3706 with No 3 1 profile Remove the flywheel see 5 3 Clamp the puller arms e Remove the air baffle Pull out the oil seal STIHL 019 T 19 e Apply puller 1 5910 890 4400 jaws 0000 893 3706 with No 3 1 profile Clamp the puller arms Pull out the oil seal Important Take special care not to damage crankshaft stub Note Remove the oil seal with clamping ring as described for clutch side Clean sealing face on crankshaft stub with standard commercial solvent based degreasant containing no chlorinated or halogenated hydrocarbons see 11 2 Note Only install oil seal 9638 003 1581 with clamping ring e Screw guide 1 1123 894 7700 onto crankshaft stub STIHL 019 T Lubricate sealing lips of oil seal with grease see 11 2 Thinly coat the outside diameter of the oil seal with sealant see 11 2 Position the oil seal so that the clamping ring faces upwards e Use the press sleeve 1 1123 893 2400 to install the oil seal Unscrew the guide Place air baffle in
24. ing behavior Note the following when making corrections to high speed screw The setting of the high speed screw H affects the maximum off load engine speed If the setting is too lean the maximum permissible engine speed will be exceeded and increase the risk of engine damage STIHL 019 T Adjusting idle speed A correction at the low speed screw L usually necessitates a change in the setting of the idle speed screw LA Engine stops while idling Check standard setting Turn idle speed stop screw LA clockwise until the chain begins to run then turn it back one half turn Chain runs while engine is idling Check standard setting Turn the idle speed stop screw LA counterclockwise until the chain stops running and then turn it about another half turn in the same direction Erratic idling behavior poor acceleration even though low speed screw is one turn open Idle setting too lean Turn the low speed screw L counterclockwise until the engine runs and accelerates smoothly 10 6 Throttle Cable Remove the carburetor see 10 5 2 Remove the air baffle e Take the protective sleeve 1 out of its seat 2 e Take the throttle cable 3 out of the retainers 4 Install in the reverse sequence 46 10 7 Spacer Flange Diaphragm A diaphragm valve is fitted on the spacer flange It prevents gas flowing back in the direction of the carburetor Remove the carburet
25. ket cover 1117 890 0900 to attach the brake spring 1 to the anchor e Pull the cover out of the engine e Push the stud puller 1 pin housing 5910 893 0501 onto the stud as far as it will go Unscrew the stud Insert stud and torque down to 16 Nm 11 8 Ibf ft e Push cover over chain brake until e Unscrew the nut 1 from the it snaps into position and then tap adjusting screw 2 it home carefully with a plastic mallet e Take the adjusting screw out of the cover 3 Reverse the above sequence to install the chain tensioner e Fit hand guard 1 over boss 2 on the fan housing Insert screw and tighten to 1 7 Nm 1 25 Ibf ft STIHL 019 T 4 ENGINE 4 1 Disassembly Always check and if necessary repair the fuel system carburetor air filter and ignition system before looking for faults on the engine Troubleshooting chart see Standard Repairs Troubleshooting handbook Remove the clutch see 3 2 Take the locking strip out of the cylinder e Open the grommet e Take throttle cable out of retainer e Pull off the worm with drive spring e Pull intake pipe 1 out of the e Remove throttle cable from intake casing 2 grommet and pull it downwards Remove throttle trigger see 8 1 and out of the handle e Take out the upper screw 1 e Pull intake pipe with grommet out e Take out screws from top of of engine housing engine e Disconnect the short circuit wire 2
26. le trigger e Remove the fan housing see 6 2 e Take the torsion spring 1 off the interlock lever 2 170RA161 VA e Remove the interlock lever e Take the torsion spring off the throttle trigger Reassemble in the reverse sequence e Remove the throttle trigger STIHL 019 T Switch Shaft 170RA115 VA Remove the throttle trigger see 8 1 e Pull contact sleeve of short circuit wire out of switch shaft e Pull out the switch shaft Reassemble in the reverse sequence z gt len l lt ic S e Itis necessary to push the contact spring slightly forward to install the switch shaft 36 8 3 Handle Molding DN 8 4 Handlebar 8 5 Top Handle b 170R Take the screws out of the handle molding Carefully pull the handle molding off the top handle Take out the screw e Pull the handle molding off the handlebar Reassemble in the reverse sequence STIHL 019 T Remove the fan housing see 6 2 e Remove the fan housing 1 and annular buffer 2 see 7 e Remove the handle molding see 8 3 Reassemble in the reverse sequence 170RA166 VA Remove the switch shaft see 8 2 Pull the contact spring 1 off the lug Pull the ground wire 2 out of the retainer Take the throttle cable out of the retainer Pull the protective tube with ground and short circuit wires out of the retainers Note Car
27. ll end needle cage and line up the piston 22 4 8 Piston Ring 4 9 Crankshaft Pull the piston out of the cylinder see 4 6 NX Remove ring from piston Us e Fit the piston pin 1 on the Remove the piston see 4 7 assembly drift 2 and slide it into the piston the pin slides The crankshaft 1 connecting home easily if the piston is rod warm 2 and needle bearing are inseparable This means the crankshaft must always be replaced as a complete unit When fitting a replacement crankshaft always install new oil seals and ball bearings Fit the hookless snap rings in the e Use a piece of old piston ring to grooves scrape the groove clean Note The ring gap must be on the piston s vertical axis point either up or down Install the piston see 4 6 e Install the new piston ring in the e Remove the retaining ring groove so that the radii face upward to piston head Install the piston see 4 6 STIHL 019 T 23 Note If the engine pan has been removed from the cylinder for a repair oil seals 9639 003 1585 with rigid housing may be installed e Pull off both oil seals ORA098 VA 170RA100 VA e Pull off both ball bearings Lubricate sealing lips of oil seals with grease see 11 2 e Slide oil seals over the crankshaft stubs so that their open sides are facing the ball bearings Install new retaining ring in crankshaft groove Install the pisto
28. mbol may appear alone on small parts 2 SPECIFICATIONS 2 1 Engine 2 2 STIHL 019 T Fuel System STIHL single cylinder two stroke engine with special impregnated cylinder bore Displacement Bore Stroke Engine power to ISO 8893 Max engine speed with bar and chain Idle speed Bearings Piston pin diameter Connecting rod length Rewind starter Reserve pull on rope rotor Starter rope Clutch Diameter Clutch engages at Crankcase leakage test at gauge pressure under vacuum Carburetor Standard setting High speed screw H Low speed screw L Carburetor leakage test at gauge pressure Fuel tank capacity Octane number Fuel mixture Mix ratio Air filter 35 2 cm 2 15 cu in 40 mm 1 57 in 28 mm 1 10 in 1 2 KW 1 6 bhp 12 000 rpm 2 800 rpm Crankshaft supported in heavy duty ball bearings needle cages on small and big ends 8 mm 0 3 in 51 mm 2 in Single pawl system min 1 2 turn 3 0 mm 0 12 in dia 800 mm 31 5 in long Centrifugal clutch without linings 64 mm 2 52 in 3 700 rpm 0 5 bar 7 25 psi 0 4 bar 5 8 psi Diaphragm carburetor Open approx 1 turn Open approx 1 turn 0 4 bar 4 8 psi 0 29 1 0 61 US pt min 90 RON US CAN pump octane min 87 unleaded Regular brand name gasoline and two stroke engine oil 1 50 with STIHL 50 1 two stroke engine oil 25 1 with other brand name two stroke air cooled engine oils Felt
29. n see 4 7 e Heat ball bearing to approx 50 C 120 F and push it on to the crankshaft stub as far as stop STIHL 019 T 24 5 IGNITION SYSTEM 5 1 Spark Plug Boot Warning Exercise extreme caution when carrying out maintenance and repair work on the ignition system The high voltages which occur can cause serious or even fatal accidents Troubleshooting on the ignition system should always begin at the spark plug See General Servicing Troubleshooting handbook Remove the fan housing see 6 2 e Pull boot off the spark plug S Note The electronic breakerless ignition system basically consists of an ignition module 1 and flywheel 2 e Use pliers to grip the leg spring and pull it out of the spark plug boot Unhook the leg spring from the ignition lead Pull spark plug boot off the ignition lead Coat end of the ignition lead about 20 mm 3 4 with oil Fit spark plug boot over the ignition lead Use pliers to grip the end of the ignition lead inside the spark plug boot and pull it out STIHL 019 T e Pinch the hook of the leg spring into the center of the lead i e about 5 mm 0 2 from the end of the lead e Pull the lead back into the boot so that the leg spring locates properly inside it as shown Important If spark plug has a separate terminal nut make sure that it is properly tightened down Fit boot on spark plug Fi
30. nd clogged air filters reduce engine power increase fuel consumption and make starting more difficult The air filter should always be cleaned when there is a noticeable loss of engine power e Slacken off the screw 1 e Swing the air filter cover 2 up and remove it from the lugs e Remove felt filter element STIHL 019 T Fit a new felt filter element Element may be knocked out or blown clear with compressed air as a temporary solution do not wash Install the felt filter element so that the web locates in the housing recess Fit filter cover over the lugs Swing the filter cover down Tighten the screw 10 2 Pickup Body The diaphragm pump draws fuel out of the tank and into the carburetor via the fuel hose Any impurities mixed with the fuel are retained by the pickup body filter The fine pores of the filter eventually become clogged with minute particles of dirt This restricts the passage of fuel and results in fuel starvation Important In the event of trouble with the fuel supply system always check the fuel tank and the pickup body first Clean the fuel tank if necessary Cleaning the fuel tank e Unscrew the filler cap and drain the tank Pour a small amount of clean gasoline into the tank Close the tank and shake the saw vigorously Open the tank again and drain it Note Dispose of old fuel at approved disposal site 42 170RA199 VA
31. nkshaft in the direction of the arrow left hand thread Disassemble and reassemble the clutch see Standard Repairs Troubleshooting handbook Screw clutch onto crankshaft and torque down to 50 Nm 37 Ibf ft Remove locking strip from cylinder Install spark plug and torque down to 25 Nm 18 5 Ibf ft Important If spark plug has a separate terminal nut make sure that it is properly tightened down Fit spark plug boot Install the chain sprocket see 3 1 3 3 Chain Brake 3 3 1 Checking Function The chain brake is one of the most important safety devices on the chainsaw Its efficiency is measured in terms of braking time i e the time that elapses between activating the brake and the saw chain coming to a standstill The shorter the braking time the better the efficiency and protection offered against being injured by the rotating chain Contamination with chain oil chips fine particles of abrasion etc and smoothing of the friction surfaces of the brake band and clutch drum impair the coefficient of friction This in turn reduces the frictional forces and thus prolongs the braking time A fatigued or stretched brake spring has the same negative effect Start the engine With the chain brake activated locked open throttle wide for brief period max 3 seconds the chain must not rotate With the chain brake released open throttle wide and activate the brake ma
32. nually the chain must come to an abrupt stop Note The braking time is in order if deceleration of the saw chain is imperceptible to the eye 3 3 2 Disassembly Release tension of brake spring by e Remove brake band from the chain e Take out the screw pushing the hand guard forwards sprocket and detach it from the bell crank Remove the hand guard from its Remove chain sprocket cover seat on the fan housing Ease the cover out of its retainers 170RA014 VA e Use assembly tool 2 Replace the brake band if Remove the E clip 1117 890 0900 to carefully disconnect the brake spring 1 there are noticeable signs of wear large areas on inside diameter e Unhook the brake spring from and or parts of outside diameter and the bell crank 3 its remaining thickness is less than 0 6 mm 0 024 Important Thickness of brake band must not be less at any point If the brake band is still serviceable use No 120 emery paper or emery cloth grain size approx 120um to clean and roughen its entire friction surface inside diameter Slip the strap off the bell crank Lever the brake band out of the pivot pin 1 engine housing e Push the strap to one side and remove it from the hand guard pivot pin 2 STIHL 019 T Remove the washer e Carefully ease the hand guard 1 and bell crank 2 off the pivot pins and lift them away together Pull the bell crank out
33. ody Clean the oil tank if necessary Troubleshooting chart see General Servicing Troubleshooting handbook e Unscrew oil filler cap and drain the oil tank Note Collect chain oil in a clean container or dispose of it properly at an approved disposal site e Use assembly hook 1 5910 893 8800 to withdraw the pickup body from the oil tank Note Avoid stretching the oil hose STIHL 019 T Assembly is a reversal of the 9 2 Oil Tank Suction Hose e Pull the pickup body out of the oil suction hose Remove the engine see 4 1 e Pull out the oil tank and push the suction hose out of its seat at the same time Wash the pickup body in white spirit and if possible blow out with compressed air Always replace a damaged pickup body Flush out the oil tank disassembly sequence e Pull suction hose with pickup body out of the oil tank Wy e Pull the pickup body out of the suction hose Inspect the pickup body and clean or replace it as necessary 39 9 3 Oil Pump Flush out the oil tank Fit the oil tank in the engine Removal housing Insert pickup body in the suction Remove the oil tank see 9 2 hose Pull the pickup body out of the oil tank e Screw the threaded rod 1 e Push stub 1 into oil pump seat 1132 893 8200 into the oil pump e Press the oil tank against the engine Note The straight face 2 must housing and pull the suction hose engage
34. or see 10 5 2 lt gt lt a 2 e Take out the screw 1 e Take out the nuts e Remove the support plate 2 Reassemble in the reverse sequence Use a new gasket Tighten down screw on support plate to 2 0 Nm 1 5 Ibf ft Tighten down spacer flange mounting screws to 8 0 Nm 5 9 Ibf ft 170RA067 VA e Take out the screws 1 e Remove the diaphragm e Remove the spacer flange 2 lt lt gt gt 3 2 lt g 5 g 1 Seal the opening in the engine e Remove the gasket pan STIHL 019 T lt gt D lt c S R 47 11 SPECIAL SERVICING TOOLS AND AIDS 11 1 Special Servicing Tools 1 Locking strip for piston 0000 893 5903 2 Press sleeve 1123 893 2400 3 Guide 1123 894 7000 4 Puller 5910 890 4400 5 Jaws No 3 1 4 0000 893 3706 6 Puller 4133 893 0800 7 Crimping tool 5910 890 8210 8 Assembly drift 1130 893 4700 9 Carburetor and 1106 850 2905 crankcase tester 10 Vacuum pump 0000 850 3501 11 Nipple 0000 855 9200 12 Fuel line 1110 141 8600 13 Sealing plate 0000 855 8106 14 Test flange 1128 850 4200 15 Setting gauge 1111 890 6400 16 Socket 13 mm 5910 893 5608 17 Torque wrench 5910 890 0301 5910 890 0302 18 Torque wrench 5910 890 0311 5910 890 0312 19 Screwdriver bit T27x125 0812 542 2104 20 Assembly hook 5910 893 8800 21 Assembly tool 1117 890 0900 22 Assembly tool 1116 893 4800 23 Stud puller 5910 893 0501 STIHL 019 T Applic
35. rope rotor see General Servicing Trouble shooting handbook e Pull rope back until the knot locates in the starter grip Press cap into the starter grip Fit the starter rope on the rotor see General Servicing Trouble shooting handbook Thread rope through the side of the rotor Push it through the inner bore from the underside pull it out at the top and secure with a simple overhand knot Grip knot and pull it out of rope rotor e Undo the knot and remove the starter rope from the rotor and fan housing Thread the new starter rope through the guide bush from outside STIHL 019 T Pull the rope back into the rotor so that the knot locates in the recess Install the rope rotor see General Servicing Trouble shooting handbook Tension the rewind spring see 6 3 2 Refit the fan housing see 6 2 33 7 AV HANDLE SYSTEM Rubber anti vibration buffers are installed between the engine housing and handle frame Damaged rubber buffers annular buffers must always be replaced Annular buffers in fan housing Remove the fan housing see 6 2 170RA135 VA e Rotate plug with key approx 90 e Push the annular buffer out of the degrees and take it out of the handlebar annular buffer 170RA133 VA e Rotate plug with key approx 90 e Push the rubber buffer out of the fan e Push the small end of the annular degrees housing buffer oil it fir
36. ry low outside temperatures the lubricating oil on the rewind spring may thicken and cause the spring windings to stick together This has a detrimental effect on the function of the starter mechanism In such a case it is sufficient to apply a few drops of paraffin kerosine to the rewind spring Then carefully pull out the starter rope several times and allow it to rewind until its normal smooth action is restored If clogged with dirt or pitch the entire starter mechanism including the rewind spring must be removed Take special care when removing the spring Wash all parts in paraffin or white spirit Lubricate the rewind spring and starter post with STIHL special lubricant see 11 2 before installing STIHL 019 T 6 2 Fan Housing 170RA050 VA Remove the air filter see 10 1 e Pull the hand guard 1 off the boss 2 on the fan housing e Remove fuel tank and oil tank filler caps together with the cap retainers Drain both tanks Note Collect chain oil and fuel in e Remove the fan housing separate clean containers or dispose of at an approved disposal site Install in the reverse sequence e Take the screws out of the handle molding lt z gt gt y N R lt a c S S F f Take out the fan housing mounting e Fit retainer at same time screws Tighten fan housing screws to 4 0 Nm 3 0 Ibf ft and screw on hand guard to 1 7 Nm 1 3 Ibf ft 30 6 3 Rewind Spring
37. ry out the four following operations on the front and rear annular buffer 170RA167 VA Ta gt 2 8 i lt fd S Ri e Rotate plug with key approx 90 degrees 37 170RA170 VA e Pry plug with key out of annular e Remove the top handle and pull out e Position the plug so that the front buffers the throttle cable 1 and protective key 1 lines up with the slot in the tube 2 with ground and short inner plug circuit wires at the same time e Push the plug in until you feel noticeable resistance e Now turn plug about 90 degrees the rear key 2 then lines up with the slot and push it home until it butts against the rubber buffer Rotate the plug another 90 degrees e Rotate plug with key approx 90 e Inspect rubber plug and replace if degrees and take it out of the necessary annular buffer Install in the reverse sequence e Push the rubber buffer out of the top e Press the top handle against the e Make sure ground wire short circuit handle rubber buffer wire and throttle cable are correctly positioned in the top handle e Pry the rubber buffer into the top handle STIHL 019 T 38 9 CHAIN LUBRICATION 9 1 Pickup Body Impurities gradually clog the fine pores of the filter with minute particles of dirt This prevents the oil pump from supplying sufficient oil to the bar and chain In the event of problems with the oil supply system first check the oil tank and the pickup b
38. st into the handlebar until its groove 1 engages the rib 2 Push home the plug without key e Pry plug with key out of annular e Pry plug without key out of e Place handlebar in position apply buffer annular buffer a little oil to the front end of the annular buffer and push it home until its groove 1 engages the rib 2 STIHL 019 T 34 e Position the plug so that the front key 1 lines up with the slot in the inner plug e Push the plug in until you feel noticeable resistance e Now turn plug about 90 degrees the rear key 2 then lines up with the slot and push it home until it butts against the rubber buffer Rotate the plug another 90 degrees Front annular buffer in engine housing Remove the top handle see 8 5 e Pry plug without key out of annular buffer STIHL 019 T 170RA154 V Push the annular buffer out of its e Pry plug without key out of seat annular buffer Push the small end of the annular Push the annular buffer out of its buffer oil it first into the seat until its seat groove 1 engages the rib 2 Rear annular buffer in engine housing Remove the top handle see 8 5 Push the small end of the annular buffer oil it first into the seat until its groove 1 engages the rib 2 35 8 MASTER CONTROL HANDLE SYSTEM 8 1 Interlock Lever Throttle Trigger 170RA160 VA e Pull the throttle cable out of thrott
39. t the fan housing see 6 2 25 5 2 Ignition Module The ignition module accommodates all the components required to control ignition timing There are two electrical connections on the coil body 1 the high voltage output 1 with ignition lead 2 2 the connector tag 3 for the short circuit wire Accurate testing of the ignition module is only possible with sophisticated test equipment For this reason it is only necessary to carry out a spark test in the workshop A new ignition module must be installed if no ignition spark is obtained after checking that wiring and stop switch are in good condition STIHL 019 T 5 2 1 Ignition Timing Ignition timing is fixed and is not adjustable Since there is no mechanical wear in these systems ignition timing cannot get out of adjustment However an internal fault in the circuit can alter the switching point in such a way that a spark test will still show the system to be in order although timing is outside the permissible tolerance This will impair engine starting and running behavior 5 2 2 Removing and Installing Remove the fan housing see 6 2 Pull boot 1 off the spark plug e Pull the short circuit wire 2 off the connector tag Take out the screws Remove the ignition module e Remove the spark plug boot see 5 1 Note The ignition lead is molded to the ignition module 26 Place the module in position
40. t the flywheel Fit flywheel nut and tighten down to 28 Nm 21 Ibf ft Take out the locking strip Fit the spark plug and tighten down to 25 Nm 18 5 Ibf ft Fit the fan housing see 6 2 STIHL 019 T 143RA106 VA Remove throttle trigger see 8 1 e Take the protective tube with the ground and short circuit wires out of e Pull ground wire off the contact spring the retainers in the handle e Pull the short circuit wire out of e Open the grommet switch shaft e Take the throttle cable out of the e Take out the upper screw 1 retainer e Disconnect the short circuit wire 2 28 5 5 Contact Spring e Pull out the ground and short Remove the fan housing see 6 2 circuit wires e Pull ground wire off the contact Install in the reverse sequence spring Wiring harness must not locate e Pull the contact spring off the lug against engine housing s filter wall pull wiring harness back in Install in the reverse sequence direction of ignition module Position protective tube with ground and short circuit wires correctly in rear retainers of handle e Make sure ground wire is properly positioned in front of handle STIHL 019 T 29 6 REWIND STARTER 6 1 General If the action of the starter rope becomes very stiff and the rope rewinds very slowly or not completely it can be assumed that the starter mechanism is mechanically in order but plugged with dirt At ve
41. troduced since publication of this service manual Technical information bulletins also supplement the parts list until a revised edition is issued STIHL 019 T Special servicing tools mentioned in the descriptions are listed in the last chapter of this manual Use the part numbers to identify the tools in the STIHL Special Tools manual The manual lists all special servicing tools currently available from STIHL Symbols are included in the text and pictures for greater clarity The meanings are as follows In the descriptions e Action to be taken as shown in the illustration above the text Action to be taken that is not shown in the illustration above the text In the illustrations gt Pointer gt Service manuals and all technical information bulletins describing engineering changes are intended exclusively for the use of STIHL servicing dealers They must not be passed to third parties Direction of movement Servicing and repairs are made considerably easier if the powerhead is mounted to the assembly stand 1 5910 890 3100 This enables the powerhead to be swivelled to the best position for the ongoing repair and leaves both hands free It is secured with the bar mounting stud after removing the chain sprocket cover and tensioner Always use original STIHL replacement parts They can be identified by the STIHL part number the STIL logo and the STIHL parts symbol amp ZThe sy
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