Stihl Hs81 Hs86 Service Manual
FILE DETAILS:
LANGUAGE:ENGLISH
FILE TYPE:PDF
PAGES:110
DOWNLOADABLE:YES
DESCRIPTION:
- 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. The special tools mentioned in the text are listed in the chapter “Special tools” in this manual.
- The tools can also be identified in the manual “STIHL special tools” on the basis of their part number. This manual lists all the tools supplied by STIHL.
- The following graphic symbols are used in the text and illustrations in order to make this manual easier to use and understand:
IMAGES:
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TABLE OF CONTENTS:
Stihl Hs81 Hs86 Service Manual
Contents
1. Foreword 3
2. Safety 4
3. Specifications 5
3.1 Power unit 5
3.2 Fuel system 5
3.3 Ignition system 5
3.4 Tightening torques 6
4. Troubleshooting 8
4.1 Clutch 8
4.2 Cutting attachment 9
4.3 Rewind starter 10
4.4 Ignition system 11
4.5 Carburetor 12
4.6 Engine 14
5. Cutting attachment 15
5.1 Removal and installation,
trimmer versions 15
5.2 Removal and installation,
cutter versions 18
5.3 Disassembly of cutting
attachment HS 81 20
5.4 Disassembly of cutting
attachment HS 86 22
5.5 Disassembly HS 81 T/
HS 86 T, adjustment
set for blade clearance 25
6. Gear 26
6.1 Gear wheel, trimmer
versions 26
6.2 Gear wheel, cutter
versions 28
6.3 Drive pinion 29
6.3.1 Bearing 30
6.4 Gear housing 31
6.5 Grease gearbox 31
7. Clutch 32
7.1 Removal and
installation 32
7.2 Clutch drum, trimmer
versions 34
7.3 Clutch drum
cutter versions 35
8. Engine 36
8.1 Muffler, spark
arresting screen 36
8.2 Leakage testing 37
8.2.1 Preparations 38
8.2.2 Vacuum test 38
8.2.3 Pressure test 39
8.3 Oil seals 40
8.4 Complete engine 41
8.4.1 Removal and
installation 41
8.4.2 Engine housing 42
8.5 Crankshaft 43
8.5.1 Removal 43
8.5.2 Installation 45
8.5.3 Ball bearing,
crankcase 49
8.6 Piston 50
8.6.1 Removal 50
8.6.2 Installation 51
8.7 Piston rings 53
9. Ignition system 54
9.1 Ignition module 54
9.1.1 Removal and
installation 54
9.2 Ignition timing 55
9.3 Testing the ignition
module 56
9.4 Spark plug terminal /
ignition lead 57
9.5 Flywheel 58
9.6 Short circuit wire 59
9.6.1 Testing 59
9.6.2 Removal and installation,
engine side 59
9.6.3 Removal and installation,
handle side, HS 81 61
9.6.4 Removal and installation,
handle side, HS 86 63
9.7 Troubleshooting chart,
ignition system 65
10. Rewind starter 68
10.1 General 68
10.2 Pawls 68
10.3 Rope rotor 69
10.4 Starter rope / grip 70
10.5 Tensioning the rewind
spring 70
10.6 Replacing the rewind
spring 71
10.7 Starter rope guide
bushing 73
11. Anti-vibration
system, repair 74
11.1 Rear anti-vibration buffer,
cutter versions 74
11.2 Front anti-vibration buffer,
cutter versions 75
11.3 Springs 76
11.4 Handle frame HS 81 77
11.4.1 Handlebar HS 81 77
11.5 Handle frame HS 86 78
11.6 Exhaust pipe 79
12. Operating levers 79
12.1 Throttle trigger / throttle
trigger interlock HS 81 79
12.2 Twist lock HS 81 81
12.3 Starting throttle lock
HS 81 82
12.4 Handle mouldings
HS 81 82
12.5 Throttle trigger / throttle
trigger interlock HS 86 84
12.5.1 Slide control 85
12.5.2 Handle mouldings
HS 86 86
13. Fuel system 87
13.1 Air filter 87
13.2 Filter housing 88
13.3 Carburetor 89
13.3.1 Removal and
installation 89
13.3.2 Choke lever 90
13.3.3 Leakage testing 90
13.4 Servicing the
carburetor 91
13.4.1 Metering diaphragm /
hand pump 91
13.4.2 Inlet needle 92
13.4.3 Fixed jet 93
13.4.4 Pump diaphragm 94
13.4.5 Adjusting screws 95
13.5 Carburetor adjustment 96
13.5.1 Basic setting 96
13.5.2 Standard setting 97
13.6 Spacer flange, removal
and installation 98
13.7 Tank vent 99
13.7.1 Check 99
13.7.2 Removal and
installation 100
2 HS 81, HS 86
Contents
13.8 Fuel intake 101
13.8.1 Pick-up body 101
13.8.2 Fuel hoses 102
13.8.3 Fuel filler cap 103
13.8.4 Fuel tank, removal
and installation 104
14. Special tools 105
15. Servicing
accessories 107
PLEASE NOTE:
⦁ This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
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