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Series 4137 Components - HT

12.

Servicing Aids

No.

Part Name

Part No.

Application

1

Lubricating grease (225 g tube)

0781 120 1111

Oil seals, oil pump drive, chain sprocket bearing

2

STIHL shaft grease (40 g tube)

0781 120 6602

Drive shaft in flexible liner

3

STIHL special lubricating oil 
(100 ml bottle)

0781 417 1315

Bearing bore in rope rotor, rewind spring

4

STIHL gear lubricant for hedge 
trimmers

0781 120 1109

High voltage output on ignition module

5

Dirko HT red sealant
(90 g tube)

0783 830 2000

Crankcase, oil seals (outside), angle drive

6

Standard commercial solvent-
based degreasant containing no 
chlorinated or halogenated 
hydrocarbons

Cleaning sealing faces

7

STIHL OH 723 press fluid
(100 ml bottle)

0781 957 9000

Between internal/external splined shafts, handle 
hose on drive tube, AV rubber element in fan 
housing

8

Graphite grease

Peg on pawl

9

Medium-strength threadlocking 
adhesive (Loctite 242)

0786 111 1101

10

High-strength threadlocking 
adhesive (Loctite 270)

0786 111 1109

11

High-strength threadlocking 
adhesive (Loctite 649)

0786 110 0126

Содержание 4137 Series

Страница 1: ...STIH STIHL Series 4137 Components HT 2005 04...

Страница 2: ...Control 28 8 2 3 Throttle Cable 28 8 3 Control Handle from 2002 29 8 3 1 Throttle Trigger Interlock Lever 29 8 3 2 Contact Detent Spring 30 8 3 3 Throttle Cable 31 8 4 Adjusting the Throttle Cable 32...

Страница 3: ...ion of this service manual Technical information bulletins supplement the service manual and parts list until revised editions are issued The special servicing tools mentioned in the descriptions are...

Страница 4: ...precautions and warnings in the instruction manual Gasoline is an extremely flammable fuel and can be explosive in certain conditions Improper handling may result in burns or other serious injuries Wa...

Страница 5: ...test at gauge pressure 80 kPa 0 8 bar Fuel mixture Regular brand name gasoline min 90 RON with STIHL 50 1 two stroke engine oil see instruction manual for further details Rated idle speed 2 800 rpm Ra...

Страница 6: ...Shroud fan housing 2 6 3 5 Screw IS M5x16 Shroud starter cover crankcase 2 6 3 5 Screw IS M5x20 AV sleeve clamp screw 4 0 5 5 Screw IS DG5x12 AV sleeve drive tube locking 0 37 0 5 Screw IS M5x20 Clam...

Страница 7: ...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 weake...

Страница 8: ...idle speed too high Readjust with idle speed screw counterclockwise Clutch springs stretched or fatigued Replace the clutch springs Clutch spring hooks broken Replace the clutch springs Loud noises Cl...

Страница 9: ...pe can be pulled out almost without resistance crankshaft does not turn Guide peg on pawl or pawl itself is worn Fit a new pawl Spring clip fatigued Fit new spring clip Starter rope is difficult to pu...

Страница 10: ...n or replace the air filter Tank vent faulty Clean tank vent or replace if necessary Leak in fuel line between tank and fuel pump Seal connections or install a new fuel line Pump diaphragm damaged or...

Страница 11: ...leaking Fit new diaphragm gasket Metering diaphragm damaged or shrunk Fit new metering diaphragm Carburetor floods engine stalls Inlet needle not sealing Foreign matter in valve seat or cone damaged R...

Страница 12: ...Muffler leaking Seal replace the muffler Engine does not deliver full power or runs erratically Piston rings worn or broken Install new piston rings 1 Muffler spark arresting screen carbonized Clean m...

Страница 13: ...b 4 1 Removing Remove the shroud b 5 1 Take out the screws arrows Remove the engine from the fan housing and put it to one side VA 936RA002 Inspect the clutch drum There should be no scores or signs...

Страница 14: ...off the clutch shoes VA 936RA305 Clean all parts b 12 Replace any damaged parts Installing VA 936RA306 Recommendation If possible always replace the clutch as a complete assembly Fit the retainers 1...

Страница 15: ...using fit them if necessary VA 936RA007 Position the engine against the fan housing making sure the lugs 1 engage the plugs 2 Fit fan housing mounting screws and tighten them down firmly b 3 2 VA 936R...

Страница 16: ...307 Take out the inner screws arrows Remove the muffler with gasket 936RA308 VA Bend up the tab 1 on the retainer Pull out the gasket 2 Install in the reverse sequence VA 936RA309 2 1 Bend the tab dow...

Страница 17: ...r not completely it can be assumed that the starter mechanism is in order but plugged with dirt At very low outside temperatures the lubricating oil on the rewind spring may thicken and cause the spri...

Страница 18: ...ove throttle cable lug from lower screw arrow Remove the rewind starter Install in the reverse sequence 936RA430 VA Check that the plug arrow in the rewind starter is correctly seated Replace if damag...

Страница 19: ...rewind spring is installed in the rope rotor The spring may pop out VA 936RA040 and uncoil if the rope rotor is not removed very carefully Always wear safety glasses Remove the pieces of broken sprin...

Страница 20: ...teady Pull out the rope with the starter grip and straighten it out VA 936RA047 Hold the starter grip firmly to keep the rope tensioned Let go of the rope rotor and slowly release the starter rope so...

Страница 21: ...ll the rope back so that the knot locates in the starter grip Refit the cap in the starter grip Tension the starter rope b 6 4 Install the rewind starter b 6 2 VA 936RA020 The ElastoStart starter grip...

Страница 22: ...verse sequence Unscrew the spark plug and block the piston with the locking strip 0000 893 5903 b 5 2 Remove the rewind starter b 6 2 Unscrew the carrier from the VA 936RA053 crankshaft Squeeze the en...

Страница 23: ...a vibration damping rubber element installed in the fan housing Removing Remove the shroud b 5 1 Loosen the clamp screws arrows on the handle molding VA 936RA313 On early machines loosen the clamp scr...

Страница 24: ...ing and rubber element Clamp the service tool in a vise Pull the fan housing off the rubber element VA 936RA237 Loosen the clamp screw 1 and if necessary the fixing screw 2 Pull the sleeve 3 off the s...

Страница 25: ...rocution do not start the engine while the control handle is exposed Take the screws out of the outer half of the handle molding Remove the handle molding VA 936RA119 Carefully remove the rivet interl...

Страница 26: ...it a square washer on both sides of the clamps arrows Secure screws only finger tight at this stage VA 936RA128 Make sure the short circuit wires throttle cable and tube are correctly positioned in th...

Страница 27: ...throttle lever VA 936RA150 2 1 Pull the throttle cable out of the tensioner VA 936RA151 Pull the short circuit and ground wires arrows off the tags on the ignition module VA 936RA152 Remove the thrott...

Страница 28: ...1 2 Disconnect the throttle cable from the throttle trigger VA 936RA249 Lift the contact spring 1 slightly and remove the throttle cable 2 Pull the interlock lever with contact spring off the pivot VA...

Страница 29: ...ws firmly b 3 2 The slot 1 in the slide control must engage over the outer edge 2 of the handle molding Torsion spring 3 must locate in the recess 4 in the slide control Remove the shroud b 5 1 Take o...

Страница 30: ...d Install all other parts in the reverse sequence This control handle has a slide 1 for automatic adjustment of the throttle cable Insert a screwdriver in the slot press the slide down and push it in...

Страница 31: ...the reverse sequence Make sure the throttle cable and protective tube are correctly positioned Tighten down the screws firmly b 3 2 Open the throttle wide several times so that the slide automaticall...

Страница 32: ...shroud b 5 1 Disconnect the throttle cable nipple 1 from the slotted pin 2 on the carburetor s throttle lever Take the throttle cable out of the throttle trigger b 8 3 1 VA 936RA150 2 1 Pull the throt...

Страница 33: ...e stop 3 on the carburetor cover Release the throttle trigger idle position The throttle lever must butt against the idle speed screw 4 Version with Control Handle from 2002 only Check adjustment rang...

Страница 34: ...n the reverse sequence VA 936RA159 If you suspect a fault in the fuel system b 4 3 In the case of problems with the carburetor or fuel supply system also check and clean or replace the tank vent b 9 5...

Страница 35: ...rew and pull the fuel hose off the carburetor Disconnect test hose Push fuel hose onto the carburetor s elbow connector Install the shroud b 5 1 Remove the shroud b 5 1 Disconnect throttle cable nippl...

Страница 36: ...hrottle cable out of the tensioner arrow VA 936RA214 Take out the screws with washers arrows Remove the spacer flange with gasket VA 936RA215 If necessary pull the screws 1 out of the spacer flange VA...

Страница 37: ...f the end cover VA 936RA258 Inspect the metering diaphragm and gasket and replace if necessary b 9 3 3 Install in the reverse sequence Additional holes in the gasket and diaphragm if there are any mus...

Страница 38: ...ured with a square end cover b 9 3 2 Remove the metering diaphragm 1 and gasket 2 VA 936RA026 1 2 from the carburetor body If the gasket and diaphragm are stuck together remove and separate them very...

Страница 39: ...Engage clevis in annular groove on head of the inlet needle 936RA030 VA 1 The spring must locate in the control lever s nipple Check that inlet needle and spring are properly seated Install in the re...

Страница 40: ...e pump diaphragm 1 and gasket 2 are held in position by the pegs arrows on the end cover 3 VA 932RA259 3 2 1 This carburetor has no high speed screw H The carburetor is tuned so that the engine receiv...

Страница 41: ...if necessary Clean or replace the air filter b 9 1 Clean the spark arresting screen replace if necessary b 5 4 Carefully turn the idle speed screw LD counterclockwise down onto its seat Then open it t...

Страница 42: ...Use the idle speed screw LA to adjust idle so that the chain does not rotate A minor correction may be necessary when operating at high altitude or at sea level Note that even very slight corrections...

Страница 43: ...2 5910 890 4501 open side facing you between the limiter cap 1 and carburetor body and pry the cap off If the limiter cap is stuck on the screw VA 932RA316 1 2 turn the puller over so that its open si...

Страница 44: ...low speed screw L Always install new limiter caps Limiter caps that have been removed once may be damaged and must not be re used Installing short limiter cap Line up the new cap for the high speed s...

Страница 45: ...the hole in the cap the holes in the valve body the sintered filter and the hole in the filler cap VA 936RA176 Testing Remove the shroud b 5 Pull fuel hose 1 off the elbow connector on the fuel pump f...

Страница 46: ...ly become clogged with minute particles of dirt This restricts the passage of fuel and results in fuel starvation In the event of trouble with the fuel supply system always check the fuel tank and the...

Страница 47: ...Fit a new pickup body Install in the reverse sequence VA 936RA180 Fuel tank Remove the fuel tank Remove the fuel hoses if necessary Install in the reverse sequence VA 936RA182 The lugs 1 must engage t...

Страница 48: ...installing it in the drive tube Apply the lubricant uniformly to the drive shaft Never pump lubricant directly into the drive tube Push the drive shaft into the drive tube until dimension a is 17 mm V...

Страница 49: ...VA 936RA232 Version from 2002 Loosen clamp screws arrows on control handle VA 936RA313 Take the fixing screw 1 out of the AV sleeve Loosen the clamp screw 2 VA 936RA233 1 2 Pull out the drive tube Pu...

Страница 50: ...ngs in the rigid part of the telescopic drive tube and an internally splined shaft supported in a flexible liner and ball bearing in the moving part Owing to the close tolerances always replace the in...

Страница 51: ...le liner 5 and replace as necessary Make sure the 15x1 circlip 3 is properly seated in the groove 936RA294 VA 2 3 4 1 5 Inspect bearing of inner drive tube and clean or replace if necessary Remove the...

Страница 52: ...ecure the bearing 2 with an original STIHL blind rivet 1 9438 003 3171 936RA080 VA 1 2 3 Installing Check the following components before installing the telescopic drive tube Check the drive tubes for...

Страница 53: ...nto the engine end Tighten down the screws 1 on the clamp 2 firmly VA 936RA084 2 1 Pull out the short drive tube 2 as far as stop Tighten down the screw 1 firmly The complete assembly must be married...

Страница 54: ...e as far as stop When pushing it home turn the shaft 936RA447 VA 2 1 back and forth so that the circlip does not get stuck on the stop or mounting rivet Do not use force to push the shaft into its end...

Страница 55: ...orque wrench 5910 890 0301 0 5 to 18 Nm 1 2 12 Torque wrench 5910 890 0311 6 to 80 Nm 1 3 13 Crimping tool 5910 890 8210 Attaching connectors to electrical wires 14 Socket DIN 3124 SW 13 5910 893 5608...

Страница 56: ...utput on ignition module 5 Dirko HT red sealant 90 g tube 0783 830 2000 Crankcase oil seals outside angle drive 6 Standard commercial solvent based degreasant containing no chlorinated or halogenated...

Страница 57: ...56 Series 4137 Components HT...

Страница 58: ...englisch english 0455 386 0123 M7 D5 S Printed in Germany...

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