Table of Contents
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Contents
1
2
3
3.1
3.2
3.3
3.4
Cutting Attachment
3.5
Tightening Torques
3.6
Special Accessories
3.6.1
3.6.2
4
Clutch, Chain Drive,
Chain Brake and
Chain Tensioner
4.1
Clutch Drum and Chain
4.2
4.3
4.4
4.4.1
4.4.2
4.5
4.5.1
4.5.2
Installing
4.5.3
4.5.4
4.5.5
Checking Operation of
Chain Brake
4.6
Chain Tensioner
4.7
Bar Mounting Studs
5
5.1
Installing Muffler
5.2
Exposing the Cylinder 20
5.3
Cylinder and Piston
5.3.1
5.3.2
5.4
5.5
5.5.1
5.5.2
5.6
Crankcase Leakage
Test
5.6.1
5.6.2
5.6.3
034, 036, 036 QS
2
5.7
Replacing the Oil
Seals
3
6
4
6.1
4
6.2
4
5
6.3
5
6.4
6
6.4.1
7
6.4.2
Installing
7
6.5
7
6.5.1
Installing
6.5.2
8
7
7.1
Routine
8
7.2
9
9
7.3
10
7.3.1
11
7.3.2
Replacing the Rewind
12
Spring (036, 036 QS)
14
7.4
15
Spring
16
17
8
17
18
8.1
19
9
9.1
19
Function
9.2
20
20
9.3
21
24
9.4
24
24
10
26
31
10.1
31
32
33
10.2
33
10.3
10.4
34
10.5
34
35
37
11
38
38
11.1
38
11.2
39
11.3
11.4
39
40
11.5
40
12
12.1
40
12.2
12.3
40
41
12.4
41
12.5
41
12.6
12.7
42
12.8
42
42
13
43
13.1
43
13.2
44
45
46
47
47
50
© 2001 Andreas Stihl AG & Co., Waiblingen
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51
53
54
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56
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62
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68
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72
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Table of Contents
Troubleshooting
Related Manuals for Stihl 034 Series
Summary of Contents for Stihl 034 Series
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Page 1: Table Of Contents
Electric Handle Heating Crankshaft System (034, 036) Crankcase Leakage Test 10.1 Troubleshooting 5.6.1 Preparations 10.1.1 Troubleshooting Chart 49 5.6.2 Pressure Test 10.1.2 Test Connections and 5.6.3 Vacuum Test Test Values © 2001 Andreas Stihl AG & Co., Waiblingen 034, 036, 036 QS... -
Page 2: Introduction
Use the part numbers to identify the There are separate handbooks for tools in the "STIHL Special Tools" servicing procedures on manual. standardized parts and assemblies The manual lists all special... -
Page 3: Safety Precautions
Safety Precautions If the engine is started up in the course of repairs or maintenance work, observe all local and country- specific safety regulations as well as the safety precautions and warnings in the owner’s manual. Gasoline is an extremely flammable fuel and can be explosive in certain conditions. -
Page 4: Specifications
Specifications Engine STIHL single cylinder two-stroke engine with special impregnated cylinder bore 036, 036 QS Displacement: 56.5 cm 61.5 cm Bore: 46 mm 48 mm Stroke: 34 mm 34 mm Compression ratio: 9.5:1 9.5:1 Engine power to ISO 8893: 3.0 kW (4.1 bhp) 3.4 kW (4.6 bhp) -
Page 5: Ignition System
Ignition System 034, 036, 036 QS Type: Transistorized magneto ignition (breakerless) Air gap: 0.2 - 0.3 mm Spark plug (suppressed): Bosch WSR 6 F Electrode gap: 0.5 mm Spark plug thread: M14x1.25 Thread length: 9.5 mm Heat range: Cutting Attachment Guide bars: STlHL Rollomatic S bars with nose sprocket. - Page 6 Tightening Torques DG and P (Plastoform) screws are used in polymer and 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 impairing the strength of the screwed assembly, providing the specified tightening torque is observed.
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Page 7: For User
Fastener Thread size For component Torque Remarks Hexagon nut Carburetor (initial) Hexagon nut Carburetor (final) Spline screw IS-M5x20 Cylinder/crankcase (036, 036 QS) 11.5 Spline screw IS-M5x20 Cylinder/crankcase (034) 10.5 M14x1.25 Spark plug 25.0 Spline screw IS-M5x20 Ignition module (with washer) Spline screw IS-M4x12 Oil pump/crankcase... -
Page 8: Chain Brake And Chain Tensioner 8
Note: Clean stub of crankshaft. Wash needle cage, examine it for damage and replace if necessary. Lubricate needle cage with STIHL multi- purpose grease - 13.2. Reassemble in the reverse Unscrew nuts (1) from chain 036 QS... -
Page 9: Sprocket
Replacing the Clutch Chain Catcher Troubleshooting chart - see "Standard Repairs, Trouble- shooting" handbook. – Remove clutch drum/chain sprocket - 4.1. Unscrew the slotted nut (1). – Remove chain sprocket cover - 4.1. – Pull boot off the spark plug. Take out screw (1) and remove Remove the shroud (2). -
Page 10: Removing
Chain Brake (034, 036) 4.4.1 Removing Troubleshooting chart - see "Standard Repairs, Trouble- shooting" handbook. – Remove the chain sprocket cover and cutting attachment - 4.1. – Remove the clutch drum/chain sprocket - see 4.1 Unscrew the clutch clockwise Carefully pry the brake spring (1) from the crankshaft (left-hand off the anchor pin and disconnect... -
Page 11: Installing
(see "Tightening Torques") Important: Coat all sliding and bearing points with STIHL multipurpose grease, 13.2, or (better) with molybdenum grease (e.g. Molykote), 13.2. Do not lubricate the brake band. -
Page 12: Removing
Chain Brake (036 QS) 4.5.1 Removing – Fit the inner side plate - 4.1. Troubleshooting chart - see "Standard Repairs, Trouble- – Install the clutch drum/chain shooting" handbook. sprocket - 4.1. – Remove the chain sprocket cover – Fit the cutting attachment and and cutting attachment - 4.1. - Page 13 Carefully pry the brake spring (1) Carefully pry spring (1) off the Disconnect spring (1) from off the anchor pin and disconnect pivot pin. lever (2). it from the lever (2). Pry the E-clip (3) off the pivot pin and remove the lever with spring.
- Page 14 – Insert screw with captive washer for hand guard and tighten down firmly (see "Tightening Torques"). Important: Coat all sliding and bearing points with STIHL multipurpose grease, 13.2, or (better) with molybdenum grease (e.g. Molykote), 13.2. Insert lever in the side of the hand Do not lubricate the brake band.
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Page 15: Checking Play
4.5.3 Checking Play – Pull hand guard toward front handle. – Unscrew nut from chain sprocket cover and remove the cover - 4.1. – Remove the cutting attachment - 4.1. Use the assembly tool Press down interlock lever (1) all 1117 890 0900 to attach the the way and hold it in that brake spring (1) to the anchor pin. -
Page 16: Adjusting Play
4.5.4 Adjusting Play The brake lever must not move. If Turn wrench to right to reduce it does, adjust play - see 4.5.4 play. Reassemble in the reverse Turn wrench to left to increase sequence. play. Lock the setting with self-tapping screw (1). - Page 17 - 5.5.2. – Before re-installing parts, the If a biological chain oil is preferred, machine recesses and seats. STIHL recommends the use of rapidly biodegradable STIHL Bioplus. To guarantee troublefree operation, use only original STIHL replace- ment parts as per the latest parts list.
- Page 18 Bar Mounting Studs Take out the cover plate Check that O-ring is fitted in spur – Remove chain sprocket cover mounting screw (1). gear. and cutting attachment - 4.1. Remove the cover plate (2) with Push stud puller 5910 893 0501 –...
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Page 19: Engine
Engine Removing and Installing Muffler 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, Trouble- shooting" handbook. Take out the screws and remove Install new gasket (1) so that its the lower casing. -
Page 20: Removing
Exposing the Cylinder Cylinder and Piston 5.3.1 Removing 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, Trouble- shooting" handbook. – Drain the fuel and oil tanks. –... -
Page 21: Installing
5.3.2 Installing Important: Hold the piston steady during this process to ensure that no jolts are transmitted to the connecting rod. – Remove piston and take the needle cage out of the connecting rod. Important: – Thoroughly clean the gasket Before removing the piston, decide seating surface on the cylinder. - Page 22 Slip the piston over the Slide the wooden assembly Slide the hose clamp on to the connecting rod so that arrow on block between the piston and manifold. The screw head must piston crown points to exhaust crankcase.
- Page 23 – Coat thread of setscrew in – Carefully line up the cylinder and cylinder with LOCTITE - gasket. 13.2. – Fit cylinder base screws and – Insert setscrew and tighten down torque down firmly in a diagonal firmly (see "Tightening Torques"). pattern (see "Tightening Torques").
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Page 24: Piston Rings
Piston Rings Crankcase 5.5.1 Removing the Crankshaft Use a screwdriver to rotate the – Remove the piston - 5.3.1. – Remove the chain brake - see 4.4 and 4.5. spur gear clockwise until the – Remove rings from piston. tensioner slide butts against the –... - Page 25 Note: The tool’s drilled plate must locate flat against the crankcase. With the crankcase horizontal (cylinder flange upright), rotate service tool until the number 7 on the plate is at the bottom. Turn the spindle of the service The crankshaft (1), connecting tool clockwise until the crankshaft rod (2) and needle bearing form...
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Page 26: Installing The Crankshaft
5.5.2 Installing the Crankshaft – Pull the oil suction hose out of – If the original crankcase is used crankcase. again, remove all the gasket residue and clean the mating – Inspect both halves of the surfaces. crankcase for cracks and replace if necessary. - Page 27 See illustrated parts list for correct components, such as oil suction installed sequence and positions of and delivery hoses, grommets, crankcase components. annular buffers and levers - and 11.4. – Inspect condition of all parts and replace as necessary. – Heat area of bearing seat on clutch side of crankcase to approx.
- Page 28 Important: The original crankshaft must not be installed in model 034S. Fit the lever (1) over the pivot pin, Push annular buffer into secure it with the E-clip and crankcase bore, from outside, attach the spring (2). until its groove (1) engages the inner rib.
- Page 29 – Push threaded sleeve over the crankshaft stub. – Hold the crankshaft steady and rotate the spindle counter- clockwise to screw the threaded sleeve onto the crankshaft. Release the crankshaft. Hold the service tool (2) steady and continue turning the spindle until the tool locates against the guide Turn the spindle clockwise to pull Screw threaded sleeve (2)
- Page 30 – Unscrew the hexagon nuts. Unscrew the spindle clockwise and take away the service tool. – Take out the two M5x72 screws. Trim away any excess gasket Fit the installing sleeve (1) material in the area of the 1118 893 4602 over the clutch cylinder mounting face.
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Page 31: Preparations
Crankcase Leakage Test 5.6.1 Preparations Defective oil seals and gaskets or – Remove the shroud from the cracks in castings are the usual cylinder - 4.3. causes of leaks. Such faults allow supplementary air to enter the – Take out the muffler upper casing engine and thus upset the fuel-air mounting screws and remove the mixture. -
Page 32: Pressure Test
5.6.2 Pressure Test mounting screws. Push the narrow – Preparations - 5.6.1. – Pump air into the crankcase with end of the sealing plate home so rubber bulb until the gauge that it is just below the lower casing. – Check tightness of spark plug indicates a pressure of 0.5 bar. -
Page 33: Vacuum Test
5.6.3 Vacuum Test Replacing the Oil Seals Oil seals tend to fail when subjected Note: It is not necessary to disassemble to a vacuum, i.e. the sealing lip lifts If the vacuum reading remains the complete crankcase to replace away from the crankshaft during the constant, or rises to no more than the oil seals. -
Page 34: Ignition System
Ignition System Ignition Lead/ Spark Plug Boot Exercise extreme caution when – Remove the air filter - see 12.1 carrying out maintenance and repair work on the ignition system. The – Pull boot off the spark plug. high voltages which occur can cause serious or even fatal –... -
Page 35: Short Circuit Wire/Ground Wire
Short Circuit Wire/ Ground Wire – Unhook the leg spring from the – Use a pointed tool to pierce the ignition lead and slip the spark center of the other end of the plug boot off the lead. ignition lead. –... - Page 36 – Pull the ground wire out through the insulating tube. – Install the new ground wire in the reverse sequence. Check that the insulating tube is properly located in the crankcase cable gland. Important: Use an ohmmeter to check correct operation of the ground and short Pull ground wire connector Removing the short circuit wire:...
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Page 37: Stop Contact
STOP Contact – The ohmmeter must now show a reading of 0 Ω. If no reading is obtained, check the connection between the contact spring and connector sleeve. Checking short circuit wire and STOP contact: – Leave one test lead clipped to the contact spring. -
Page 38: Flywheel 38 Removing
Flywheel 6.4.2 Installing 6.4.1 Removing – Take off the flywheel. – Inspect the flywheel. If you find any damage (e.g. cracks, , broken fan blades), fit a new flywheel. Important: If a new flywheel 1125 400 1208 is installed in a machine with heated handles X 31 813 247, the original front handle must always be... -
Page 39: Ignition Module
Ignition Module 6.5.1 Removing and Installing – Use lower mounting screw to connect the ground wire to the ignition module. Fit the two screws and tighten them down moderately. – Rotate the flywheel until the magnets are between the two arms of the ignition module. -
Page 40: Ignition Timing
Take special care when removing the spring. Wash all parts in paraffin/kerosine or white spirit. Lubricate the rewind spring and starter post with STIHL special lubricant, 13.2, before installing. 034, 036, 036 QS... -
Page 41: Replacing The Rewind Spring (036, 036 Qs)
– Remove any remaining bits of spring from the fan housing. – Lubricate die rewind spring with STIHL special lubricant and fit it with the spring housing (bottom plate facing up) in the fan housing. – Engage the spring loop over the... -
Page 42: Tensioning The Rewind
Tensioning the Rewind Spring AV Handle System Repair so the starter rope can rewind The crankcase and tank housing properly. are connected by vibration damping rubber buffers. Damaged rubber Note: buffers (annular buffers) must The rewind spring is correctly always be replaced in sets. tensioned when the starter grip sits firmly in the rope guide bush without Note:... -
Page 43: Master Control
Master Control Construction and Function – Take out the annular buffer The main part of the Master Control mounting screws. is the switch shaft with an integrally molded multi-function operating – Use a screwdriver to pry the lever, a molded cam and a second annular buffers out of their seats. -
Page 44: Throttle Trigger/Interlock Lever (034, 036)
Throttle Trigger/Interlock Lever (034, 036) Use a 5 mm drift to drive out the In the "STOP" position the – Remove the air filter - see 12.1 connector sleeve moves against the cylindrical pin (3). Take the Take out the handle molding contact spring (arrow). -
Page 45: Throttle Trigger/Interlock Lever/Switch Lever (036 Qs)
Throttle Trigger/Interlock Lever/Switch Lever (036 QS) Fit the handle molding so that the To remove the switch lever (1), – Remove the air filter - 12.1. lug at its front end engages swing it back (arrow). Unscrew fastening screw (1) properly under the seat on the tank housing. -
Page 46: Switch Shaft
Switch Shaft Take the switch shaft out of its – To remove the throttle trigger, – Remove the air filter - 6.4. first remove the switch shaft - mounting. Take out the handle molding see 9.4 fastening screw. Lift away the Install in the reverse sequence. -
Page 47: Electric Handle Heating System (034, 036)
Electric Handle Heating System (034, 036) 10.1 Troubleshooting The entire handle heating system is maintenance-free and subject to practically no wear. Faults in the generator, heating elements and wiring are generally caused by mechanical damage. Take out handle molding Clip ohmmeter test leads to wires fastening screw and lift away 1 and 3. - Page 48 Type of Reading in Condition Remedy Ω heating element (see 6.4.1) Previous version approx. 2.5 No reading Break in Check individual components - circuit 10.1.2 less than 2.5 Short circuit in a Check individual components - component 10.1.2 New version 7.2 - 9.4 in Ordnung No reading...
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Page 49: 10.1.1 Troubleshooting Chart
10.1.1 Troubleshooting Chart Start Do both handles warm up? Turn on Heater switch on "I" switch Measure resistance of individual heating elements with ohmmeter (On machines with carburetor heating, pull connector pin of wire from heating element out of the round plug) Check rear handle heating element In good condition? -
Page 50: 10.1.2 Test Connections And Test Values
10.1.2 Test Connections and Test Values – The pin and socket connections of wires 1 to 4 must be disconnected to test the individual components. (see 10.1, fig.138 RA 132 VA) Component Ohmmeter connection Resistance If faulty (use either test lead) Leadl 1 Lead 2 Spec. -
Page 51: Heater Switch
10.2 Heater Switch 10.3 Heating Element in Rear Handle – The front handle has to be Reassemble in the reverse – Remove the handle molding - removed for access to the heater sequence. see 10.1 switch - 12.8.1. Slide the insulating tubes off the Note: Take the ground wire ring Check correct installed position of... - Page 52 – Before fitting the new heating – Reconnect the wires and slide element, clean the surface inside the insulating tubes back over the the handle so that it is free from pin and socket connectors. grease, dirt and moisture. Reassemble all other parts in the Note: reverse sequence.
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Page 53: Heating Element In Front Handle
10.4 Heating Element in Front Handle The heating element in the front handle is not replaceable. A new handle must be fitted if the heating element is faulty. – To disassemble the front handle, remove the carburetor box cover 4.3. –... -
Page 54: Generator
10.5 Generator 10.5.1 Removing – Remove the air filter - 12.1. – Pull the generator wire out of the rear grommet, through the – Remove the tank vent - 12.6. insulating tube and the retainer. – Remove the shroud - see 4.3 Note: Inspect generator and poles for... -
Page 55: 10.5.2 Installing
10.5.2 Installing Chain Lubrication 11.1 Pickup Body Fit centering tool 1118 893 3500 Impurities gradually clog the fine on the crankshaft so that its pores of the filter with tiny particles groove engages the Woodruff of dirt. This prevents the oil pump key. -
Page 56: Suction Hose
11.2 Suction Hose 11.3 Vent Valve Hold the oil hose steady and pull – Remove the pickup body - A valve (1) is installed in the tank out the pickup body. 11.1. wall to keep internal tank pressure equal to atmospheric pressure. –... -
Page 57: Removing And Installing The Oil Pump
Take out the oil pump mounting Setting the oil pump to the screws. E matic position "E " is the most economic position under normal operating conditions using a STIHL E matic guide bar. 034, 036, 036 QS... -
Page 58: Servicing The Oil Pump
11.5 Servicing the Oil Pump Install in the reverse sequence. 3 4 3 Note: Pay special attention to the following points: R=1,5mm Hold the projecting end with the Always check the suction hose and modified flat nosed pliers. Now pickup body before disassembling push home the sleeve with the the oil pump. -
Page 59: Fuel System
Fuel System 12.1 Air Filter Insert a screwdriver between the The air filter’s function is to remove Cleaning the prefilter and dust and dirt sucked in with the prefilter and carburetor box cover main filter: combustion air and thus help and lever the prefilter out of the reduce wear on engine components retainer. -
Page 60: Leakage Testing The Carburetor
12.2 Leakage Testing the Carburetor Installing the prefilter (034, 036): Troubleshooting chart - see "Standard Repairs, Trouble- – Slide the prefilter in the guides in shooting" handbook. the carburetor box cover and make sure its snaps into position. Important: In the case of problems with the Installing the main filter: carburetor or fuel supply system, also check and clean the tank vent... -
Page 61: Removing And Installing The Carburetor
12.3 Removing and Installing the Carburetor The all-position diaphragm carburetor consists of a fuel pump and the actual carburetor. Although the fuel pump shares a common housing with the carburetor, it operates as a completely separate and independent unit. Troubleshooting chart - see "Standard Repairs, Trouble- shooting"... -
Page 62: Servicing The Carburetor
12.4 Servicing the Carburetor – Remove the carburetor - see 12.3 It is advisable to check the serviceability of the fuel pump whenever the carburetor is removed for repair. – Inspect pump diaphragm - see "Carburetors" handbook, chapter 7.3, Pump Diaphragm To disassemble the carburetor, Carefully separate the diaphragm take out the screws (1) of the... - Page 63 Remove the inlet control lever (1) A part-load fixed jet (2) is Use a drift to press the center of with spindle (2), spring (3) and installed in addition to the valve the sealing plate down until it inlet needle (4).
- Page 64 Fit the inlet needle (1). – Place the gasket on the Note: carburetor body. The pump diaphragm and gasket Fit spring (2) in bore. are held in position by the pegs Fit the metering gasket with the (arrow) on the cover.
- Page 65 Fit the throttle shaft with torsion Removing the throttle shaft: Removing the choke shaft: spring and secure with E-clip. Unscrew the throttle shutter Unscrew the choke shutter Fit the idle speed screw and fastening screw and pull the fastening screw.
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Page 66: Adjusting The Carburetor
12.5 Adjusting the Carburetor will be exceeded and increase the risk of engine damage due to a lack of lubricant and overheating. If the saw is used at high altitudes (mountains) or near sea level it may be necessary to correct the setting. Carry out the correction with the two adjusting screws: –... -
Page 67: Tank Vent
12.6 Tank Vent Erratic idling behavior, poor Correct operation of the carburetor acceleration: is only possible if atmospheric pressure and internal fuel tank – Idle setting too lean. Turn the low pressure are equal at all times. This speed screw counterclockwise is ensured by the tank vent. -
Page 68: Fuel Filter And Fuel Hose
12.7 Fuel Filter and Fuel Hose Caution: The fine mesh strainer on the pickup body must not be damaged. It can be washed in white spirit. Note: It is not advisable to clean the filter (2) - always fit a new one. The foam filter must be fitted without creases or twists. -
Page 69: Tank Housing
12.8 Tank Housing 12.8.1 Removing and Installing Pull the washer (1) off the studs Remove the annular buffer – Drain the tank housing. and remove the sleeve (2) from mounting screw. Remove mounting screws from the manifold. side of front handle. - Page 70 8,5mm Pull the impulse hose off the Note: In order not to damage the manifold nipple. If a screw thread is stripped in one when fitting it through the tank of the mounting holes for special housing intake opening, use the self-threading screws, the tank following procedure: housing can be repaired by...
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Page 71: Special Servicing Tools And Aids
Special Servicing Tools and Aids 13.1 Special Servicing Tools Part Name Part No. Application Locking strip 0000 893 5903 Blocking the crankshaft Press sleeve 1118 893 2401 Installing oil seal (clutch side) Press sleeve 1121 893 2400 Installing oil seal (ignition side) Puller 5910 890 4400 Removing oil seals... -
Page 72: Servicing Aids
(LOCTITE 649) see "Tightening Torques" Standard commercial, solvent Cleaning crankshaft stub based degreasant containing no chlorinated or halogenated hydrocarbons STIHL special lubricant 0781 417 1315 Bearing bore in rope rotor, rewind spring Electrician’s repair kit 5910 007 1050 Electrical system...
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