Stihl Hs81 Hs86 Service Repair Manual – PDF Download

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Stihl Hs81 Hs86 Service Repair Manual

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Stihl Hs81 Hs86 Service Repair Manual

LANGUAGE:ENGLISH
PAGES:110
DOWNLOADABLE:YES
FILE TYPE:PDF

STIHL HS81 HS86 SERVICE REPAIR MANUAL – PDF DOWNLOAD:

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DESCRIPTION:

• Stihl Hs81 Hs86 Service Repair Manual
• This service manual contains a detailed description of all the typical repair work required for this power tool. The illustrated spare parts lists should also be consulted when carrying out repairs, for they show the installed position and sequence of assembly for the individual parts.
• The latest edition of the respective parts lists should always be used when determining the part numbers of the required replacement parts. Faults in the machine may be due to several causes. Refer to the chapter “Troubleshooting” and the “STIHL Service Training System” for troubleshooting procedures for all function groups.
• Refer to the “Technical Information” bulletins for engineering changes which have been introduced since publication of this service manual. Technical information bulletins supplement the parts list and service manual until a new edition is published.

TABLE OF CONTENTS:

Stihl Hs81 Hs86 Service Repair Manual

Contents....................................................................  2
1. Foreword.................................................................  4
2. Safety...................................................................  5
3. Specifications...........................................................  6
	3.1 Power unit..........................................................  6
	3.2 Fuel system.........................................................  6
	3.3 Ignition system.....................................................  6
	3.4 Tightening torques..................................................  7
4. Troubleshooting..........................................................  9
	4.1 Clutch..............................................................  9
	4.2 Cutting attachment.................................................. 10
	4.3 Rewind starter...................................................... 11
	4.4 Ignition system..................................................... 12
	4.5 Carburetor.......................................................... 13
	4.6 Engine.............................................................. 15
5. Cutting attachment....................................................... 16
	5.1 Removal and installation, trimmer versions.......................... 16
	5.2 Removal and installation, cutter versions........................... 19
	5.3 Disassembly of cutting attachment HS 81............................. 21
	5.4 Disassembly of cutting attachment HS 86............................. 23
	5.5 Disassembly HS 81 T/ HS 86 T, adjustment set for blade clearance.... 26
6. Gear..................................................................... 27
	6.1 Gear wheel, trimmer versions........................................ 27
	6.2 Gear wheel, cutter versions......................................... 29
	6.3 Drive pinion........................................................ 30
		6.3.1 Bearing....................................................... 31
	6.4 Gear housing........................................................ 32
	6.5 Grease gearbox...................................................... 32
7. Clutch................................................................... 33
	7.1 Removal and installation............................................ 33
	7.2 Clutch drum, trimmer versions....................................... 35
	7.3 Clutch drum cutter versions......................................... 36
8. Engine................................................................... 37
	8.1 Muffler, spark arresting screen..................................... 37
	8.2 Leakage testing..................................................... 38
		8.2.1 Preparations.................................................. 39
		8.2.2 Vacuum test................................................... 39
		8.2.3 Pressure test................................................. 40
	8.3 Oil seals........................................................... 41
	8.4 Complete engine..................................................... 42
		8.4.1 Removal and installation...................................... 42
		8.4.2 Engine housing................................................ 43
	8.5 Crankshaft.......................................................... 44
		8.5.1 Removal....................................................... 44
		8.5.2 Installation.................................................. 46
		8.5.3 Ball bearing, crankcase....................................... 50
	8.6 Piston.............................................................. 51
		8.6.1 Removal....................................................... 51
		8.6.2 Installation.................................................. 52
	8.7 Piston rings........................................................ 54
9. Ignition system.......................................................... 55
	9.1 Ignition module..................................................... 55
		9.1.1 Removal and installation...................................... 55
	9.2 Ignition timing..................................................... 56
	9.3 Testing the ignition module......................................... 57
	9.4 Spark plug terminal / ignition lead................................. 58
	9.5 Flywheel............................................................ 59
	9.6 Short circuit wire.................................................. 60
		9.6.1 Testing....................................................... 60
		9.6.2 Removal and installation, engine side......................... 60
		9.6.3 Removal and installation, handle side, HS 81.................. 62
		9.6.4 Removal and installation, handle side, HS 86.................. 64
	9.7 Troubleshooting chart, ignition system.............................. 66
10. Rewind starter.......................................................... 69
	10.1 General............................................................ 69
	10.2 Pawls.............................................................. 69
	10.3 Rope rotor......................................................... 70
	10.4 Starter rope / grip................................................ 71
	10.5 Tensioning the rewind spring....................................... 71
	10.6 Replacing the rewind spring........................................ 72
	10.7 Starter rope guide bushing......................................... 74
11. Anti-vibration system, repair........................................... 75
	11.1 Rear anti-vibration buffer, cutter versions........................ 75
	11.2 Front anti-vibration buffer, cutter versions....................... 76
	11.3 Springs............................................................ 77
	11.4 Handle frame HS 81................................................. 78
		11.4.1 Handlebar HS 81.............................................. 78
	11.5 Handle frame HS 86................................................. 79
	11.6 Exhaust pipe....................................................... 80
12. Operating levers........................................................ 80
	12.1 Throttle trigger / throttle trigger interlock HS 81................ 80
	12.2 Twist lock HS 81................................................... 82
	12.3 Starting throttle lock HS81....................................... 83
	12.4 Handle mouldings HS81............................................. 83
	12.5 Throttle trigger / throttle trigger interlock HS 86................ 85
		12.5.1 Slide control................................................ 86
		12.5.2 Handle mouldings HS86....................................... 87
13. Fuel system............................................................. 88
	13.1 Air filter......................................................... 88
	13.2 Filter housing..................................................... 89
	13.3 Carburetor......................................................... 90
		13.3.1 Removal and installation..................................... 90
		13.3.2 Choke lever.................................................. 91
		13.3.3 Leakage testing.............................................. 91
	13.4 Servicing the carburetor........................................... 92
		13.4.1 Metering diaphragm / hand pump............................... 92
		13.4.2 Inlet needle................................................. 93
		13.4.3 Fixed jet.................................................... 94
		13.4.4 Pump diaphragm............................................... 95
		13.4.5 Adjusting screws............................................. 96
	13.5 Carburetor adjustment.............................................. 97
		13.5.1 Basic setting................................................ 97
		13.5.2 Standard setting............................................. 98
	13.6 Spacer flange, removal and installation............................ 99
	13.7 Tank vent..........................................................100
		13.7.1 Check........................................................100
		13.7.2 Removal and installation.....................................101
	13.8 Fuel intake........................................................102
		13.8.1 Pick-up bodyf................................................102
		13.8.2 Fuel hoses...................................................103
		13.8.3 Fuel filler cap..............................................104
		13.8.4 Fuel tank, removal and installation..........................105
14. Special tools...........................................................106
15. Servicing accessories...................................................108

PLEASE NOTE:

⦁ This is not a physical manual but a digital manual – meaning no physical copy will be couriered to you. The manual can be yours in the next 2 mins as once you make the payment, you will be directed to the download page IMMEDIATELY.
⦁ This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
⦁ Require some other service manual or have any queries: please WRITE to us at [email protected]