Workshop Manual
Husqvarna Chain Saws
101
Anti-vibration system
LIST OF CONTENTS
Air filter
Tank unit
General
Safety
Updates
INTRODUCTION
Dismantling and reassembly of the entire chain saw
Repair of a specific sub-assembly
INTRODUCTION
General Instructions
SAFETY REGULATIONS
Special instructions
6 - English
TECHNICAL DATA
TECHNICAL DATA
8 - English
TECHNICAL DATA
TECHNICAL DATA
10 - English
TECHNICAL DATA
TECHNICAL DATA
12 - English
TECHNICAL DATA
TECHNICAL DATA
502 50 18-01 4 mm 502 50 19-01 3 mm 502 50 88-01 5 mm
TOOLS
Tools for all chain saws
502 50 57-01 3/16 502 50 16-01 6 mm 502 50 64-01 5 mm
compl 502 50
Tools for saws 36 and
Tools for saws 40, 45, 51 and
TOOLS
compl 502 51
Tools for saws 42, 242 and
Tools for saws 254, 257 and
TOOLS
compl 502 51
Tools for saws 61, 268 and
Tools for saws 281 and
TOOLS
compl 502 51
Tools for saws 394 and
TOOLS
3 mm 4 mm 5 mm 3/16 8 mm 10 mm 502 50
Designation
List of tools
TOOLS
Order number
Character key
SERVICE DATA Saws 36 and
English
SERVICE DATA
Character key
SERVICE DATA Saws 42, 242 and
22 - English
English
SERVICE DATA
24 - English
Saws 40 and
SERVICE DATA
Character key
English
SERVICE DATA
26 - English
Saws 51 and
SERVICE DATA
Character key
3-4English
SERVICE DATA
28 - English
SERVICE DATA Saws 254 and
5254
Character key
English
SERVICE DATA
Character key
SERVICE DATA
30 - English
English
SERVICE DATA
Character key
SERVICE DATA Saws 61, 268 and
32 - English
English
SERVICE DATA
Character key
SERVICE DATA Saws 281 and
34 - English
English
SERVICE DATA
Character key
SERVICE DATA
36 - English
3-5 5-6
SERVICE DATA
20-22,5 10-12 12-14
30-40 2-3
Character key
SERVICE DATA Saw
38 - English
English
SERVICE DATA
Idling low rpm cont
TROUBLE SHOOTING Trouble shooting schematic
Starting
Idling low rpm
Acceleration and retardation
TROUBLE SHOOTING
Trouble shooting methods
High rpm
Wear protective glasses
SAFETY EQUIPMENT
Chain brake
Dismantling
SAFETY EQUIPMENT
44 - English
Cleaning and Inspection
Assembly
SAFETY EQUIPMENT
SAFETY EQUIPMENT
46 - English
SAFETY EQUIPMENT
SAFETY EQUIPMENT
Checking brake operation
The engine should not be running during the test
Description
SAFETY EQUIPMENT Chain catcher
Replacing
Do not touch the muffler until it has cooled. Risk of burns
Muffler
SAFETY EQUIPMENT
Dismantling
when working on a catalytic converterWARNING
SAFETY EQUIPMENT
Cleaning and Inspection
Assembly
Dismantling
SAFETY EQUIPMENT Stop switch
Cleaning and Inspection
Assembly
The fuel used in the chain saw poses the following hazards
Throttle lock
SAFETY EQUIPMENT
Dismantling
SAFETY EQUIPMENT
Check that the springs, where fitted, are
Cleaning and inspection
SAFETY EQUIPMENT
Clean all parts
1. The liquid and its vapours are poisonous
SAFETY EQUIPMENT
Assembly
The fuel used in the chain saw poses the following hazards
56 - English
SAFETY EQUIPMENT
Dismantling
STARTER
Wear protective glasses
Remove the parts of the old ferrule
Changing the ferrule
Cleaning and Inspection
STARTER
STARTER
Assembly
Check the cord tension
STARTER
60 - English
Dismantling
ELECTRICAL SYSTEM Ignition system
ELECTRICAL SYSTEM
ELECTRICAL SYSTEM
Cleaning and Inspection
Assembly
Clean all parts, especially the flywheel and shaft taper
64 - English
Stop switch
Fitting the spark plug cover
ELECTRICAL SYSTEM
Description
Trouble shooting
Handle heating
ELECTRICAL SYSTEM
Checking the heat loops in the rear handles
Checking the power switch
ELECTRICAL SYSTEM
Checking the generator
Dismantling
CENTRIFUGAL CLUTCH
Clean all parts and inspect the following
Cleaning and Inspection
CENTRIFUGAL CLUTCH
CENTRIFUGAL CLUTCH
Assembly
NOTE! The bearing can also be greased later through the hole on the crankshaft
Dismantling
LUBRICATION SYSTEM
70 - English
LUBRICATION SYSTEM
72 - English
LUBRICATION SYSTEM
36/41
40/45
51/55
LUBRICATION SYSTEM
40/45
LUBRICATION SYSTEM
74 - English
Turn the screw until the worm gear is removed
Dismantling the oil pumps worm gear
LUBRICATION SYSTEM
First screw the tool onto the entire worm gear
That the taper on the adjuster screw shows no signs of wear
Cleaning and Inspection
LUBRICATION SYSTEM
Assembling the oil pump
Assembling the worm gear
LUBRICATION SYSTEM
78 - English
LUBRICATION SYSTEM
LUBRICATION SYSTEM
Saws 42, 61, 242, 246, 254, 257, 262, 268, 272, 281, 288, 394 and
LUBRICATION SYSTEM
40/45
36/41
50/51
LUBRICATION SYSTEM
82 - English
LUBRICATION SYSTEM
40/45
51/55
The fuel used in the chain saw poses the following hazards
CARBURETTOR
Description
Design
Operation
CARBURETTOR
1. The liquid and its vapours are poisonous
CARBURETTOR
Dismantling
The fuel used in the chain saw poses the following hazards
86 - English
Tillotson HS 228 B
Tillotson HS 255 B
CARBURETTOR
Walbro HDA and HD
Tillotson HS 260 A
CARBURETTOR
88 - English
Walbro WJ
Walbro WG
CARBURETTOR
ZAMA C1Q-EL1
Walbro WT
CARBURETTOR
1. The liquid and its vapours are poisonous
Cleaning and Inspection
CARBURETTOR
The fuel used in the chain saw poses the following hazards
The fuel used in the chain saw poses the following hazards
Assembly
CARBURETTOR
Plugs
Tillotson HS 228 B
CARBURETTOR
92 - English
Tillotson HS 255 B
CARBURETTOR
Tillotson HS 260 A
CARBURETTOR
94 - English
CARBURETTOR
Walbro HDA och HD
Walbro WJ
CARBURETTOR
96 - English
Walbro WG
CARBURETTOR
Walbro WT
CARBURETTOR
98 - English
ZAMA C1Q-EL1
CARBURETTOR
The fuel used in the chain saw poses the following hazards
Pressure testing
Refitting onto chain saw
CARBURETTOR
Compressed air at a high pressure can damage the foam
AIR FILTER
268K, 272K and 272S
Prefilter
Main filter
AIR FILTER
102 - English
The fuel used in the chain saw poses the following hazards
TANK UNIT
Cleaning and Inspection
Dismantling
268K
Bolts placed at
TANK UNIT
262XP
TANK UNIT
Assembly
Ensure that the fuel pipe and throttle cable are not damaged
106 - English
ANTI-VIBRATION SYSTEM
Description
Dismantling
ANTI-VIBRATION SYSTEM
Assembly
Dismantling
PISTON AND CYLINDER
108 - English
PISTON AND CYLINDER
Cleaning and Inspection
1. The piston crown 2. The top of the cylinder bore
PISTON AND CYLINDER
Faults and causes
PISTON AND CYLINDER
Assembly
112 - English
PISTON AND CYLINDER
Crankcase and cylinder
Pressure testing
PISTON AND CYLINDER
Decompression valve
Dismantling
CRANKCASE AND CRANKSHAFT
Ensure that no dirt or foreign particles enter the bearings
CRANKCASE AND CRANKSHAFT
CRANKCASE AND CRANKSHAFT
Cleaning and Inspection
116 - English
CRANKCASE AND CRANKSHAFT
Assembly
Ensure that dirt and foreign particles do not enter the bearing
118 - English
CRANKCASE AND CRANKSHAFT
Ensure excess gasket material does not fall into the crankcase
CRANKCASE AND CRANKSHAFT
Ensure that dirt and foreign particles do not enter the bearing
CRANKCASE AND CRANKSHAFT
120 - English
CRANKCASE AND CRANKSHAFT
Bar bolts
CRANKCASE AND CRANKSHAFT
Changing the seals
Dismantling
CRANKCASE AND CRANKSHAFT
Assembly
3120
CRANKCASE AND CRANKSHAFT
3.5 mm
42, 242, 246 1 mm