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TS 420
Stihl TS 420 User Manual
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ST
I
H)
STIHL TS 410, 420
2007-0
9
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
4
2 Safety Precautions
6
3 Specifications
7
Shortblock
7
Fuel System
7
Ignition System
7
Cutting Wheels
7
Tightening Torques
8
4 Troubleshooting
10
Clutch
10
Cast Arm with Guard
11
Rewind Starter
12
Ignition System
13
Carburetor
15
Engine
18
5 Cast Arm with Guard
19
Water System
19
Cast Arm with Guard
20
Testing Radial and Axial
25
Truth of Running
25
Test Sequence
26
Ribbed Poly V-Belt
27
Tensioner
28
Starter Cup
29
6 Clutch
31
Belt Pulley
32
Clutch Drum
32
Studs for Securing the Cast Arm with Guard
33
7 Shortblock
34
Muffler / Spark Arresting
34
Screen
34
Leak Testing
35
Preparatory Steps
35
Vacuum Test
35
Pressure Test
36
Oil Seals
37
Removing and Installing
38
The Shroud
38
Cylinder
40
Crankshaft
42
Removal and Installation
42
Grooved Ball Bearing / Crankcase
47
Piston
48
Removal
48
Installation
49
Piston Rings
51
Decompression Valve
51
8 Ignition System
52
Ignition Module
52
Removal and Installation
52
Ignition Timing
54
Testing the Ignition Module
54
Spark Plug Boot
55
Flywheel
56
Short Circuit Wire / Switch
57
Testing
57
Removal and Installation
57
Troubleshooting, Ignition System
59
9 Rewind Starter
62
General
62
Removal and Installation
62
Pawl
62
Rope Rotor
63
Starter Rope / Starter Grip
64
Tensioning the Rewind Spring
65
Replacing the Rewind Spring
66
10 Repairing the AV System
68
AV Spring on the Handlebar
68
AV Spring in the Support
69
AV Spring at the Bottom
69
Of the Crankcase
69
AV Spring on the Carburetor
70
Handlebar
70
Rubber Buffers / Support
72
11 Actuating Levers
74
Switch Shaft / Choke Lever
74
Switch Shaft, Removal and Installation
74
Throttle Trigger / Trigger Interlock, Removal and Installation
75
Choke Lever / Holder, Removal and Installation
77
12 Fuel System
78
Air Filter
78
Carburetor, Removal and Installation
78
Leakage Testing
80
Repairing the Carburetor
80
Metering Diaphragm
80
Inlet Needle
81
Fixed Jet
82
Pump Diaphragm
82
Air Valve
84
Choke Shaft / Choke Shutter
86
Throttle Shaft / Throttle Shutter
88
Adjusting Screws
90
Carburetor Adjustment
91
Basic Setting
91
Standard Setting
92
Choke Rod and Throttle Rod
93
Intake Elbow, Removal and Installation
94
Impulse Hose
95
Tank Vent
96
Testing
96
Removal and Installation
97
Manual Fuel Pump
97
Fuel Intake
98
Pickup Body
98
Fuel Hoses
99
Fuel Tank Filler Cap
100
Tank Housing, Removal and Installation
100
13 Special Tools
102
14 Servicing Accessories
104
Other manuals for Stihl TS 420
Instruction Manual
96 pages
Original Instruction Manual
24 pages
5
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Stihl TS 420 Specifications
General
Engine Power
4.4 bhp
Weight
21.2 lbs
Arbor Size
20 mm
Maximum Wheel Size
350 mm
Maximum Cutting Depth
125 mm
Displacement
66.7 cc (4.1 cu. in.)
Fuel Capacity
710 cc
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