Stihl 4180 Series Service Manual
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Stihl 4180 Series Service Manual

Angle drive gear
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Mecanism de antrenare STIHL HT
Manual pentru reparaţii
2016-10

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  • Page 1 Mecanism de antrenare STIHL HT Manual pentru reparaţii 2016-10...

  • Page 3: Table Of Contents

    Cuprins Siguranţa............Mecanism de antrenare ......... 12 Mănuşi de protecţie ........Cuprins ............12 Ochelari de protecţie........Unelte, mijloace auxiliare........ 12 Piese de schimb ..........Demontarea mecanismului de antrenare..13 Dezasamblarea mecanismului de antrenare .. 13 Localizarea defectelor........Asamblarea mecanismului de antrenare ..13 Mecanism de antrenare ........

  • Page 4: Siguranţa

    Piese de schimb Dacă se incorporează piese de schimb neautorizate de STIHL, se poate întâmpla să nu se mai îndeplinească condiţiile pentru funcţionarea componentelor, respectiv să se invalideze dispozitivele de siguranţă. Aceasta poate duce la leziuni corporale grave, chiar letale.

  • Page 5: Localizarea Defectelor

    Localizarea defectelor Mecanism de antrenare Simptom Cauză Remediere Lanţul de ferăstrău nu este lubrifiat Rezervorul de ulei este gol Umpleţi rezervorul de ulei cu ulei, sau este lubrifiat cu prea Orificiile de ulei din capacul roţii de lanţ Curăţaţi orificiile de ulei puţin ulei sunt murdărite Orificiul de admisie ulei de la şina de ghi-...

  • Page 6: Tijă

    Tijă Cuprins M5x28 (6,5 Nm / 58 lbf. in.) Unelte, mijloace auxiliare inserţie T27 – 0812 542 2104 – Cheie dinamometrică – 5910 890 0302 – ?urubelniţă T27x200 – 5910 890 2415 – Demontaţi tija, Slăbiţi şurubul de prindere (1) şi scoateţi prin tragere tija (2) Montaţi tija, Împingeţi tija (2) în mecanismul de antrenare.

  • Page 7: Roata De Lanţ

    Roata de lanţ Cuprins M5x13 (8 Nm / 71 lbf. in) Unelte, mijloace auxiliare inserţie T27 – 0812 542 2104 – Cheie combinată – 1129 890 3401 – Cheie dinamometrică – 5910 890 0302 – ?urubelniţă T27x200 – 5910 890 2415 –...

  • Page 8: Montarea Roţii De Lanţ

    Montarea roţii de lanţ Înlocuiţi roata de lanţ (5), dacă urmele de uzură (a) sunt mai adânci de 0,5 mm. Împingeţi sus şaibele (4) împreună cu roata de lanţ (5). Împingeţi sus arcurile tip disc (3) în ordinea corespunzătoare. Ungeţi şurubul (2) cu Loctite 242 şi înşurubaţi-l. Ţineţi şaibele (4) cu cheia fixă...

  • Page 9: Dispozitiv De Întindere A Lanţului

    Dispozitiv de întindere a lanţului Cuprins P3x10 (1 Nm / 9 lbf. in) P3x10 (1 Nm / 9 lbf. in) P3x10 (1 Nm / 9 lbf. in) Unelte, mijloace auxiliare Introduceţi roata dinţată cilindrică (3). Împingeţi piesa de presare (4) pe şurubul de tensionare (5).

  • Page 10: Şuruburi De Legătură Pentru Fixarea Şinei

    Şuruburi de legătură pentru fixarea şinei Cuprins Unelte, mijloace auxiliare Cheie combinată – 1129 890 3401 – Cheie dinamometrică – 5910 890 0302 – Dispozitiv de înşurubare bolţ M8 – 5910 893 0501 – Cheie cu clichet – Scoateţi şurubul de legătură pentru şină Scoateţi capacul roţii de lanţ...

  • Page 11: Capacul Roţii De Lanţ

    Capacul roţii de lanţ Unelte, mijloace auxiliare Montarea piuliţei de legătură Cheie combinată – 1129 890 3401 Introduceţi noua piuliţă de legătură (2). – Şurub de legătură – 5910 893 9601 – Cheie fixă, deschidere cheie 19 mm – Burghiu elicoidal Ø 11 mm –...

  • Page 12: Rezervor De Ulei

    Rezervor de ulei Cuprins Unelte, mijloace auxiliare Montarea pompei de ulei Cheie combinată – 1129 890 3401 – Manşon – 4116 894 1000 – Burghiu de filetat M4 – Ciocan de lăcătuşerie – Dorn Ø 8 mm – Ciocan de extras cu racord filetat M4 şi M5 –...

  • Page 13: Montarea Supapei

    Scoateţi apărătoarea laterală, @ 5.3 8.10 Montarea conductei de ulei Din exterior, cu ajutorul dornului Ø 8 împingeţi supapa (1) în rezervor. Împingeţi capul de aspirare (7) pe furtunul de ulei. Prin orificiu, împingeţi capul de aspirare (7) la Montarea supapei rezervorul de ulei.

  • Page 14: Mecanism De Antrenare

    Mecanism de antrenare Cuprins D5x32 (8 Nm / 71 lbf. in.) M5x28 (6.5 Nm / 58 lbf. in.) Unelte, mijloace auxiliare Cheie combinată – 1129 890 3401 – Manşon de presare – 4112 893 2401 – inserţie T27 – 0812 542 2104 –...

  • Page 15: Demontarea Mecanismului De Antrenare

    Folosind manşonul de presare 4112 893 2401, Dorn Ø 4 mm – presaţi rulmentul cu bile cu caneluri (11) cu garniturile Lubrifiant de angrenaj STIHL, doză 40 g – – de etanşare din oţel pe ambele părţi până la opritorul 0781 120 1004 de pe arbore (12).

  • Page 16: Montarea Mecanismului De Antrenare

    Aplicaţi Dirko în nuturile (săgeata) jumătăţii de carcasă de mecanism de antrenare (7) în aşa mod, încât să depăşească marginea cu o înălţime de a = 2 - 3 mm. Aşezaţi jumătatea de carcasă de mecanism de antrenare (7) pe cealaltă jumătate de carcasă de mecanism de antrenare (16).

  • Page 17: 10 Unelte, Mijloace Auxiliare

    Ciocan de extras cu racord filetat M4 şi M5 Demontarea conductei de ulei şi a pompei de ulei 0781 120 1004 Lubrifiant de angrenaj STIHL, doză 40 g Lubrifierea mecanismului 0781 957 9000 Fluid de presare OH 723, flacon 50 ml...
  • Page 18 RA_004_2016_01_55 rumänisch www.stihl.com...
  • Page 19 Tijă telescopică STIHL HT Manual pentru reparaţii 2017-01...
  • Page 21 Cuprins Informaţii privitoare la aceste instrucţiuni de reparaţii ............Documente valabile ........Simboluri în text ..........Siguranţă în reparaţii........Mănuşi de protecţie ........Ochelari de protecţie........Piese de schimb ..........Pregătirea reparaţiei ........Pregătirea tijei telescopice......Localizarea defectelor........Tijă telescopică ..........Tijă...

  • Page 22: Informaţii Privitoare La Aceste Instrucţiuni De Reparaţii

    Piese de schimb Dacă se incorporează piese de schimb neautorizate de STIHL, se poate întâmpla să nu se mai îndeplinească condiţiile pentru funcţionarea componentelor, respectiv să se invalideze dispozitivele de siguranţă. Aceasta poate duce la leziuni corporale grave, chiar letale.

  • Page 23: Pregătirea Reparaţiei

    Pregătirea reparaţiei Pregătirea tijei telescopice Scoateţi unitatea de motor. Demontaţi mecanismul de antrenare. Curăţaţi tija telescopică. Tijă telescopică HT...

  • Page 24: Localizarea Defectelor

    Localizarea defectelor Tijă telescopică Simptomă Cauză Remediere Arborele telescopic nu poate fi Şaibele elastice sunt murdărite Curăţaţi şaibele elastice reglat Şaibele elastice sunt slăbite Înlocuiţi şaibele elastice Puterea nu este transmisă Tija telescopică nu se află complet în uni- Corectaţi poziţia de montaj tatea de motor / dispozitivul de tăiere este împins înăuntru Manşonul de la tija interioară...

  • Page 25: Tijă Exterioară

    Tijă exterioară Cuprins M6x30 (8 Nm / 71 lbf. in.) Unelte, mijloace auxiliare Montarea tijei exterioare Inserţie T27x125 – 0812 542 2041 – Cheie dinamometrică – 5910 890 0302 – ?urubelniţă T27x200 – 5910 890 2415 – Cleşte pentru nituri oarbe –...

  • Page 26: Demontarea Tijei Exterioare

    Împingeţi piesa de strângere (6) strâns pe tijă (16). Strângeţi şurubul (5). Împingeţi tija (1) atât de mult în piesa de strângere (6), încât x = 32 cm (12.6 in.). Strângeţi şurubul (4). Împingeţi sus inelul de etanşare (13) în aşa mod, încât nutul să...

  • Page 27: Tijă Interioară

    Tijă interioară Cuprins Unelte, mijloace auxiliare Şurubelniţă – 0000 890 2300 – Cleşte cu vârf – Unsoare pentru tija telescopică – 0781 120 6000 – Demontarea arborelui de acţionare (pe partea de acţionare) Pregătirea reparaţiei, @ 3.1 Demontarea "tijei exterioare", @ 5.3. Slăbiţi nasurile de blocare din tijă...

  • Page 28: Demontarea Tijei Interioare

    Demontarea tijei interioare Demontarea "tijei exterioare", @ 5.3. Demontarea arborelui de acţionare (pe partea de acţionare), @ 6.3 Slăbiţi nasurile de blocare din tijă (6) şi trageţi jos inelul distanţier (3). Trageţi afară tubul rulmentului (5) din tijă (6). Asamblarea tijei interioare Împingeţi tubul rulmentului (5) în tijă...

  • Page 29: Arbori De Acţionare

    Arbori de acţionare Cuprins Unelte, mijloace auxiliare Cleşte – 0811 611 8200 – Cheie combinată – 1129 890 3401 – Cheie fixă, deschidere cheie 13 – Unsoare pentru tija telescopică – 0781 120 6000 – Demontarea arborelui de acţionare Pregătirea reparaţiei, @ 3.1 Demontarea "tijei exterioare", @ 5.3 Cu cheia fixă...

  • Page 30: Asamblarea Arborelui De Acţionare

    Asamblarea arborelui de acţionare Introduceţi inelul elastic (11) în arborele de acţionare (12). Împingeţi rulmentul (7) şi arcurile (8) pe arborele de acţionare (10). Împingeţi manşonul (5) pe arborele de acţionare (10) în aşa mod, încât nasul de blocare amanşonului să indice către motor.
  • Page 31 Ungeţi suprafaţa (F) arborelui de acţionare (10, 12). Cantitatea totală de unsoare: 3,5 g (0.12 oz.) Tijă telescopică HT...

  • Page 32: Unelte, Mijloace Auxiliare

    Unelte, mijloace auxiliare Scule Seria piesei Denumire Utilizare 0000 890 2300 Şurubelniţă Demontarea manşoanelor de la tijă 0811 611 8200 Cleşte pentru inel de siguranţă Montarea şi demontarea inelului de siguranţă de la arborele de acţionare. 0812 542 2104 Inserţie T27x125 Înşurubarea şi deşurubarea şuruburilor cu stea inte- rioară...
  • Page 34 RA_005_2016_01_55 rumänisch www.stihl.com...
  • Page 35 STIHL HT Angle Drive Gear Service Manual 2017-02...
  • Page 37 Contents About this Service Manual ......Applicable Documentation ......Symbols in Text ..........Safety Precautions......... Protective Gloves..........Safety Glasses..........Spare Parts............. Preparations for Repair........Preparing Angle Drive Gear......Gearbox ............Overview............Tools, Servicing Aids ........Removing Angle Drive Gear ......Installing Angle Drive Gear ......

  • Page 38: About This Service Manual

    If there is a risk of particles being thrown during the repair: Wear safety glasses. Spare Parts If spare parts not approved by STIHL are installed, they may not fulfill the required function or deactivate safety devices. This can result in serious or fatal injuries.

  • Page 39: Gearbox

    Line up the drive tube (6) and push it into the angle Reversible ratchet wrench – drive gear (end with screws (8)) as far as stop. STIHL gear grease, 80 g – 0781 120 1109 – Rotate input shaft at the other end until it engages the pinion (2).

  • Page 40: Installing The Drive Pinions

    Take pinions (2, 10) with ball bearings out of the lower Fill sealing grooves in upper half of the gear housing half of the gear housing (1). (7) with a bead of sealant that is 2 - 3 mm high (a). If necessary, remove ball bearings from drive pinions, @ 4.9.

  • Page 41: Tools, Servicing Aids

    Puller Removing ball bearings Reversible ratchet wrench Removing collar nuts on carrier 0781 120 1109 STIHL gear grease, 80 g tube Lubricating gearbox 0783 830 2000 Dirko HT red sealant, 70 ml tube Sealing gearbox Solvent-based degreasant containing no chlorin-...
  • Page 42 RA_008_2017_01_01 englisch www.stihl.com...
  • Page 43 STIHL Series 4180 Powerhead Service Manual 2016-11...
  • Page 45 Contents Safe diagnosis and repairs ......Ignition System..........17 Tools, Servicing Aids ........17 Safety Precautions......... Removing the Flywheel ........17 Protective Gloves..........Installing the Flywheel ........18 Safety Glasses..........Testing Ignition Module with ZAT 3 Tester ..18 Spare Parts............. Testing Ignition Module with ZAT 4 Tester ..
  • Page 46 Muffler ............37 14.1 Tools, Servicing Aids........37 14.2 Removing the Muffler ........37 14.3 Installing the Muffler ........14.4 Removing the Spark Arresting Screen... 14.5 Installing the Spark Arresting Screen..... Valve Gear ............. 38 15.1 Tools, Servicing Aids........38 15.2 Disassembling / Assembling Valve Gear ..

  • Page 47: Removing The Drive Tube

    Spare Parts Safe diagnosis and repairs If spare parts not approved by STIHL are installed, they Guide to Using this Service Manual may not fulfill the required function or deactivate safety devices. This can result in serious or fatal injuries.

  • Page 48: Troubleshooting

    Troubleshooting Clutch Condition Cause Remedy Tool stops at full throttle under load Clutch shoes worn Fit new clutch shoes or clutch Clutch drum worn Install new clutch drum Blade warped Replace blade Tool runs while engine is idling Engine idle speed too high Readjust with idle speed screw (LA) (counterclockwise) Clutch spring stretched / fatigued or...

  • Page 49: Ignition System

    Ignition System Exercise extreme caution while carrying out maintenance and repair work on the ignition system. The high voltages which occur can cause serious or fatal accidents. Condition Cause Remedy Engine runs roughly, misfires, tem- Spark plug boot is loose Press boot firmly onto spark plug, check porary loss of power leg spring, replace if necessary...

  • Page 50: Carburetor

    Carburetor Condition Cause Remedy Carburetor floods, engine stalls Inlet needle not sealing. Foreign matter in Remove and clean the inlet needle, clean valve seat or cone damaged the carburetor Inlet control lever sticking on spindle Free off inlet control lever Helical spring not located on nipple of inlet Remove the inlet control lever and refit it control lever...

  • Page 51: Engine

    Engine Carburetor – Ignition system – Always check and, if necessary, repair the following parts before looking for faults on the engine: Air Filter – Fuel system – Condition Cause Remedy Engine does not start easily, stalls Low compression pressure Check compression with pressure loss or at idle speed, but operates normally compression tester, or check valve clear-...

  • Page 52: Shroud

    Shroud M5x12 (4 Nm / 35 lbf. in.) D5x24 (6 Nm / 53 lbf. in.) M5x12 (4 Nm / 35 lbf. in.) D5x24 (6 Nm / 53 lbf. in.) D5x24 (6 Nm / 53 lbf. in.) M5x12 (4 Nm / 35 lbf. in.) Tools, Servicing Aids Socket, T27x125 –...

  • Page 53: Tools, Servicing Aids

    Rewind Starter D5x24 (6 Nm / 53 lbf. in.) Special Servicing Tools, Servicing Aids Socket, T27 – 0812 542 2104 – Torque wrench – 5910 890 0302 – Installing tool – 5910 890 2204 – Screwdriver, T27x200 – 5910 890 2415 –...

  • Page 54: Installing The Rewind Spring

    Assembling the Rewind Starter Fit the new rope guide bushing (2) in the hole in the fan housing (3). Insert the screw spindle (11) of the installing tool Secure the end of the starter rope (3) on the starter 5910 890 2204 through the rope guide bushing (2). grip (1) with one of the special knots shown.

  • Page 55: Installing The Rewind Starter

    If the starter grip droops to one side, tension the rewind spring at least one additional turn. Installing the Rewind Starter Fit the rewind starter (9) in position. Insert and tighten down the screws (10). Fit pawl (6) in the rope rotor (5). Fit the washer (7).

  • Page 56: Fuel Tank

    Fuel Tank D5x24 (6 Nm / 53 lbf. in.) Special Servicing Tools, Servicing Aids Pump – 0000 850 1300 – Nipple – 0000 855 9200 – Socket, T27x125 – 0812 542 2104 – Torque wrench – 5910 890 0302 – Screwdriver, T27x200 –...

  • Page 57: Removing The Tank Vent

    Pressure test Test fuel tank (12) for leaks – @ 6.2. Set the pump to pressure mode. Install filter and filter housing, @ 10.2. Generate gauge pressure of 0.5 bar in the fuel tank. Cleaning the Fuel Tank Pressure must remain constant for at least 20 seconds. If it drops, the leak must be found: Open the tank cap (8).

  • Page 58: Removing The Fuel Tank

    Press grommets of hose (4) into the fuel tank. Install the pickup body, @ 6.6. Coat both ends of hoses (1, 2) with STIHL press fluid. Push the hoses (1, 2) onto the connectors (3). Push connectors (3) of both hoses (1, 2) into grommets of hose (4).

  • Page 59: Fan Housing, Av System

    Fan Housing, AV System D5x24 (6 Nm / 53 lbf. in.) D5x24 (6 Nm / 53 lbf. in.) D6x32 (7 Nm / 62 lbf. in.) Tools, Servicing Aids Installing the Fan Housing Jaws (profile No. 9) – 0000 893 3707 Fit the fan housing (3) on the clutch.

  • Page 60: Installing The Rubber Element

    Insert extension 4180 893 4400 (11), small diameter Insert extension 4180 893 4400 (11), small diameter first, in the square hole in the clutch drum (1). first, in the square hole in the clutch drum (1). Apply puller 5910 890 4400 (1) with jaws (profile No. Use press to remove the clutch drum (1).

  • Page 61: Ignition System

    Ignition System P4x10 (0,8 Nm / 7 lbf. in.) D5x28 M10x1 (9 Nm / 80 lbf. in.) (12 Nm / 106 lbf. in.) D4x18 (4,5 Nm / 40 lbf. in.) M8x1 (17 Nm / 150 lbf. in.) Tools, Servicing Aids Socket, T27x125 –...

  • Page 62: Installing The Flywheel

    Testing Ignition Module with ZAT 3 Tester Mount the puller 4119 890 4501 (21) with screws (20) from clutch. Turn screw (22) of puller 4119 890 4501 (21) clockwise. Remove the flywheel (10). Installing the Flywheel Degrease taper on crankshaft stub and in flywheel (7) hub.

  • Page 63: Removing The Ignition Module

    Remove the cover, @ 4.3. Adjust air gap between ignition module (18) and flywheel (10) with the setting gauge 4118 890 6401 Pull boot (11) off the spark plug. (16). Connect ZAT 4 input terminal (30) to spark plug boot Tighten down the screws (12).

  • Page 64: Removing The Short Circuit Wire, Ground Wire And Throttle Cable

    Remove the short circuit wire, ground wire and throttle cable. Remove the short circuit wire, ground wire and throttle cable from the control handle, @ 12.4 or @ 13.4. 8.11 Installing the Short Circuit Wire, Ground Wire and Throttle Cable Use a scriber to pierce the center of the ignition lead’s insulation, about 15 mm (0.6 in) from the end of the lead.

  • Page 65: Clutch

    Clutch M6x25 (12 Nm / 106 lbf. in.) Tools, Servicing Aids Socket, T27x125 – 0812 542 2104 – Locking screw – 4282 890 2700 – Torque wrench – 5910 890 0302 – Torque wrench – 5910 890 0312 – Screwdriver, T27x200 – 5910 890 2415 –...

  • Page 66: Assembling The Clutch

    Assembling the Clutch Fit the clutch so that the lettering faces up. Attach the spring (8) to the clutch shoes (4, 5) so that its hooks (arrow) are on the side with the lettering. Installing the Clutch Place the cover plate (6) on the flywheel so that the number “2”...

  • Page 67: 10 Intake System

    10 Intake System D5x28 (9 Nm / 80 lbf. in.) M5 (2 Nm / 18 lbf. in.) 10.1 Tools, Servicing Aids Screwdriver – 0000 890 2305 – Socket, T27x125 – 0812 542 2104 – Screwdriver, T27x200 – 5910 890 2415 –...

  • Page 68: Assembling The Intake System

    Disconnect throttle cable (17) from the lever (7). Fit sleeve of throttle cable (17) in recess in spacer flange (6). Remove the throttle rod (8). Fit blade receptacle of ground wire (18) on ground tab Turn lever (7) counterclockwise and pull it off. (19).
  • Page 69 Fit and tighten down the nuts (14). Fit the filter element (13). Install the shroud, @ 4.5. Series 4180 Powerhead...

  • Page 70: 11 Carburetor

    Screwdriver, T10 – 5910 890 2308 – counterclockwise. Screwdriver, T8 – 5910 890 2310 – Turn the low speed screw (L) (13) 1 1/4 turns STIHL OH 723 press fluid – 0781 957 9000 – counterclockwise. Adjusting idle speed 11.2 Adjust the Carburetor...

  • Page 71: Testing Carburetor For Leaks

    Start the engine and warm it up at varying speeds for If the pressure reading does not drop any further than 0.5 1 minute – if necessary, turn the idle speed bar (7.25 psi) within 20 seconds, the carburetor is airtight. screw (LA) slowly clockwise until the engine runs If it drops, there are three possible causes: smoothly –...

  • Page 72: Inlet Needle

    Installing If there is an annular indentation (arrow) on the sealing cone of the inlet needle (10), fit a new inlet needle. Installing Fit the inlet needle (10), pointed end first, in the carburetor. Fit the spring (9). Position the inlet control lever (7) with spindle (8) on the spring (9) first, then slide the inlet control lever’s clevis into the annular groove in the inlet needle (10).

  • Page 73: Adjusting Screws

    Hold end cover (32) with gasket (31) and pump Installing diaphragm (30) up and fit it on the carburetor body – making sure the gasket (31) and pump diaphragm (30) do not move out of position. Move the end cover (32) carefully back and forth until its pegs engage the holes in the carburetor body.

  • Page 74: 11.10 Choke Shaft With Lever

    Insert and tighten down the screw (27). Fit the choke knob (24), @ 11.4. 11.11 Accelerator Pump Removing Rotate the throttle shaft (43) and fit the throttle shutter (45). The small hole in the throttle shutter (45) faces the adjusting screws. Insert and tighten down the screw (27).

  • Page 75: 12 Control Handle - Loop Handle

    – Punch-down tool – 5910 890 4000 Remove the throttle trigger (11) together with – lever (9) and torsion spring (10). STIHL multipurpose grease – 0781 120 1110 – Unhook the throttle cable (14). 12.2 Removing the Control Handle Take lever (9) with torsion spring (10) out of the throttle trigger (11).

  • Page 76: Assembling The Control Handle

    Lift the lever (6) slightly, pull the contact spring (5) out Fit the torsion spring (7) on the pivot pin so that its of the guide (arrow) and push it to one side. downward angled leg locates against the rib (arrow). Remove the lever (6).
  • Page 77 Push lever (9) into the throttle trigger (11) as far as stop so that the hooked end of the torsion spring (10) projects from the opening (arrow). Attach the throttle cable (14). Fit the throttle trigger (11) with lever (9) in position so that the hooked leg of the torsion spring (10) engages the pivot.

  • Page 78: 13 Control Handle - Bicycle Handle

    13 Control Handle – Bicycle Handle P4x16 (1,3 Nm / 12 lbf. in.) M5x48x22 (2,5 Nm / 22 lbf. in.) 13.1 Special Servicing Tools, Servicing Aids Remove ‘outer handle molding’ (16). Remove the torsion spring (9). Socket, T27 – 0812 542 2104 –...

  • Page 79: Assembling The Control Handle

    13.5 Assembling the Control Handle Starting at lever (2), press the ground wire (21) into its guides (arrows). Push the ground wire (21) terminal (21) onto the pivot of lever (2) and then rotate the ground wire (21) into the slot as far as stop. Push the torsion spring (3) onto the pivot pin of lever (2) so that its hooked end engages the lever (arrow).
  • Page 80 Fit the ‘outer handle molding’ (16). Insert and tighten down the screws (10). Fit short circuit wire, ground wire and throttle cable on the engine, @ 8.11. Install the control handle, @ 13.3. Push lockout lever (5) into place and hook torsion spring (4) (arrow) to the lockout lever.

  • Page 81: 14 Muffler

    14 Muffler D5x24 (6 Nm / 53 lbf. in.) M4x9,6 (2 Nm / 18 lbf. in.) D4x18 (4,5 Nm / 40 lbf. in.) 14.1 Tools, Servicing Aids Install the rewind starter, @ 5.7. Install the shroud, @ 4.5. Socket, T20x125 – 0812 542 2041 –...

  • Page 82: 15 Valve Gear

    15 Valve Gear M5x30 (5 Nm / 44 lbf. in.) D4x18 (4,5 Nm / 40 lbf. in.) M5x16 (9 Nm / 80 lbf. in.) M8x1 (17 Nm / 150 lbf. in.) 15.1 Tools, Servicing Aids Fit the sleeve (15). Screw nut (16) onto the collar screw (12). Socket, T27x125 –...
  • Page 83 Installing the valves Unscrew the nut (10) and remove it together with the starter cup (11). Take out the screws (9). Pry off the cover (8) at the recesses. Pull out the pin (6). Remove the cam followers (4, 5). Remove the cam gear (7).

  • Page 84: Checking / Adjusting Valve Clearance

    Remove the cover, @ 4.2. Take out the screw (20) and remove together with sealing ring (19), valve cover (18) and gasket (17). Pull boot off the spark plug. Unscrew the spark plug. Fit the cam gear (7) so that the arrows on it line up with the marks (arrows) in the cylinder.
  • Page 85 Rotate the crankshaft clockwise until the cam lobe points downwards. Check that mark on flywheel lines up with the right- hand screw on the ignition module. The two arrows on the cam gear (8) must line up with the two notches in the cylinder. Fit the cover (8) before adjusting the valves.

  • Page 86: 16 Powerhead

    Puller – 5910 890 4400 – Slide the sealing plate 0000 855 8106 (20) between STIHL multipurpose grease – 0781 120 1110 – the exhaust port and muffler so that it completely fills the space between the two upper screws on the Dirko HT red sealant –...

  • Page 87: Performing Pressure Loss Test

    Insert assembly drift 1108 893 4700 (23) in the If there is a loss of engine power, the cause may be impulse hose (24). carbon deposits or combustion residue. They accumulate primarily on valve seats and valve heads. The combustion Push on the test flange 5910 850 4200 (22) and chamber is cannot be sealed properly in such a case.

  • Page 88: Testing Compression Pressure

    If air is escaping at the cylinder inlet/exhaust ports or Turn the crankshaft counterclockwise until the piston around the pushrods, the cause may be: butts against the locking screw. Carbon deposits on inlet/exhaust valve Unscrew the nut (3) and remove the starter cup (4). –...

  • Page 89: Removing The Engine

    Remove the clutch, @ 9.2. Remove the fan housing, @ 7.1. Remove the flywheel, @ 8.2. Remove ground wire, short-circuit wire and throttle cable from the engine, @ 8.8. Remove the fuel tank, @ 6.8 Remove the clutch, @ 9.2. Remove the flywheel, @ 8.2.

  • Page 90: 16.10 Assembling The Engine

    Apply assembly drift 1110 893 4700 to other side of Use installing tool 8 – 5910 890 2208 (8mm piston piston (1) ad push out the piston pin (11). pin) or installing tool 9 – 5910 890 2209 (9mm piston pin) to fit the snap ring (10) in the piston (2).

  • Page 91: 17 Tools, Servicing Aids

    0781 120 1110 STIHL multipurpose grease, 225 g tube Lubricating contact springs in loop handle 0781 957 9000 STIHL OH 723 press fluid, 50 ml bottle Installing hoses and AV rubber element 0783 830 2000 Dirko HT red sealant, 70 ml tube...
  • Page 92 Series 4180 Powerhead...
  • Page 94 RA_014_2016_01_01 englisch www.stihl.com...

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