STIH)
STIHL MS 440
2006-05
1
MS 440, MS 440 C
q
© ANDREAS STIHL AG & Co. KG, 2006
Contents
1.
Introduction
3
2.
Safety Precautions
4
3.
Specifications
5
3.1
Engine
5
3.2
Fuel System
5
3.3
Ignition System
5
3.4
Chain Lubrication
5
3.5
Tightening Torques
6
4.
Troubleshooting
Chart
7
4.1
Clutch, Chain Drive,
Chain Brake,
Chain Tensioner
7
4.2
Rewind Starter
8
4.3
Chain Lubrication
9
4.4
Ignition System
10
4.5
Carburetor
11
4.6
Engine
13
5.
Clutch, Chain Drive,
Chain Brake and
Chain Tensioner
14
5.1
Clutch Drum /
Chain Sprocket
14
5.2
Replacing the
Chain Catcher
15
5.3
Clutch
15
5.4
Chain brake
17
5.4.1
Checking correct
operation
17
5.4.2
Removing
18
5.4.3
Installing
20
5.5
Chain Tensioner
22
5.6
Bar Mounting Studs
23
6.
Engine
24
6.1
Muffler / Spark
Arresting Screen
24
6.2
Leakage Test
25
6.2.1
Preparations
26
6.2.2
Pressure Test
27
6.2.3
Vacuum Test
27
6.3
Oil Seals
28
6.4
Removing the shroud 30
6.5
Cylinder and Piston
30
6.5.1
Removing
30
6.5.2
Installing
32
6.6
Piston Rings
35
6.7
Crankcase
35
6.7.1
Removing the
crankshaft
35
6.7.2
Installing the
crankshaft
38
6.8
Decompression Valve 43
7.
Ignition System
44
7.1
Ignition Module
44
7.1.1
Ignition Timing
44
7.1.2
Removing and
Installing
45
7.1.3
Testing the ignition
system
46
7.2
Ignition Lead /
Spark Plug Boot
47
7.3
Flywheel
48
7.3.1
Removal
48
7.3.2
Installation
49
7.4
Stop switch
49
7.5
Wiring harness
49
7.5.1
Testing Wiring
Harness
50
7.6
Ignition System
Troubleshooting
51
8.
Rewind Starter
54
8.1
General
54
8.2
Removing and
Installing
54
8.3
Pawls
54
8.4
Rope Rotor
55
8.5
Starter rope
55
8.5.1
Tensioning
56
8.6
Starter Rope Guide
Bushing
57
8.7
Replacing the
Rewind Spring
58
9.
AV handle system
59
10.
Single lever master
control /
handle system
60
10.1
Switch shaft
60
10.2
Throttle Trigger /
Interlock Lever
61
11.
Chain Lubrication
62
11.1
Pickup Body /
Suction Hose
62
11.2
Valve
63
11.2.1 Cleaning
63