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343R 345RX 343F 345FX 345FXT
Workshop manual
Model 343R, 345RX, 343F, 345FX, 345FXT Contents
General recommendations ___________________
1.Starter __________________________________
2.Electrical system _________________________
General recommendations
Remember
Special tools
Fire risk
Contents
1 Starter
1Starter
Dismantling
Dismantling
Assembly
Starter
Assembly
Replacing the drive dogs
1Starter
Replacing the drive dogs
Electrical system
Contents
Assembly _________________________________
Checking the ignition spark ____________________
Electrical system
Checking the ignition spark
502 71
Checking the ignition spark
Electrical system
Replacing the spark
plug cover
502 50
Electrical system
502 54
Electrical system
Dismantling
Dismantling
Drive dogs
Heated handles
Do not pry off the heating element
before the locking catch has been
Wiring diagram
Electrical system
Electrical system
Fuel system
Contents
Assembly _________________________________
Carburettor settings _________________________
Fuel system
Air filter
Air filter
Tank venting
Fuel filter
Massage the oil into the air filter
Fuel system
Fuel pump
Carburettor
Dismantling
Fuel system
The carburettor’s design
The metering unit
The blending unit
Fuel system
The pump unit
Dismantling the carburettor
Fuel system
The pump unit
Fuel system
In the event of leakage – remove the needle valve
Note how the jets are
positioned
For example, the H-needleis a
little shorter than the L-needle
Assembling the carburettor
Use Loctite on the valve screws
Fuel system
Assembling the carburettor
are not bent or pinched when the
The H-needleis a little shorter
than the L-needle
Check carefully that the fuel hoses
Carburettor settings
Basic setting
Fine adjustment
Function
setting
Correctly adjusted carburettor
The recommended max. speed must not be exceeded
Idling speed T-screw
Carburettor adjustment 345RX/FX
adjustment 345RX/FX
Adjusting the L-needle
Adjusting the H
Check for wear on pins A and B
Fuel system
Disassemble the throttle control A, the lock to prevent accidental throttle operation B, the start throttle lock C and the throttle stop D in order to check if replacement is necessary
Fuel system
Page
4 Centrifugal clutch
Contents
Assembly _________________________________
Dismantling ________________________________
Centrifugal clutch
502 21
Dismantling
Dismantling
Centrifugal clutch
502 54
Clutch drum
502 11
Assembly
Assembly
Change the bearings in the clutch housing if necessary
Centrifugal clutch
Page
5 Angle gear
Contents
Assembly _________________________________
Dismantling ________________________________
Angle gear
Let the small circlip around the axle remain
Dismantling
Dismantling
503 97
Assembly
Angle gear
Shaft
503 80
Angle gear
Shaft
6 Cylinder and piston
Contents
Cleaning, inspection _________________________
Assembly _________________________________
Cylinder and piston
Dismantling
Turn the valve the right way when fitting
Decompression valve
Cylinder and piston
Decompression valve
Cleaning, inspection
manifold is fitted using a
Inlet manifold
Exercise caution if the inlet
Analysis and actions
Insufficient lubrication
Cause
Action
Piston scoring caused by heavy carbon deposits
Cylinder and piston
Cause
Action
Piston damage caused by a too high engine speed
Piston ring breakage
Piston ring guide pin
Damage caused by
Foreign objects
Cylinder and piston
Cause
Action
Service tips
Defect
Be careful with the lower edge of the piston ring
groove. If this is damaged, or if carbon deposits
Wear tolerances
Cylinder bore
Piston ring gap
Piston ring groove
7 Crankshaft and crankcase
Contents
Assembly _________________________________
Leakage testing the crankcase _________________
Crankshaft and crankcase
Dismantling
Dismantling
Crankshaft and crankcase
502 52
Inspecting the
crankshaft
Crankshaft and crankcase
Inspecting the
Assembly
Assembly
Crankshaft and crankcase
502 50
Leakage testing the
crankcase
Press down the sealing plates as
far as possible between the bolts
Husqvarna E-Tech
503 55
Crankshaft and crankcase
Page
Tools
Contents
Starter __________________________________
Electrical system __________________________
List of tools
505 38
Starter
Electrical
List of tools
gear
Crankshaft
Workshop
114 01
2003W24