Husqvarna TC 450 Workshop Manual page 31

Trouble
Rear transmission chain noise
Clutch slip
Clutch drag
Gears not engaging
Gearchange lever doesn't
return
Slips out of gear
Engine lacks power
Engine overheating
Part. N. 8000 H1344 (10-2009)
TROUBLES AND REMEDIES
Cause
Clutch noise
1. Discs worn
2. Excesive free play between clutch drum and driving discs
Gearbox noise
1. Gears worn
2. Gear splines worn
1. Chain stretched or badly adjusted
2. Engine sprocket and rear wheel sprocket worn
1. Clutch springs weak
2. Clutch discs worn
1. Spring tension uneven
2. Clutch discs bent
1. Gearshift forks bent or seized
2. Gearchange pawls worn
3. Gearshift forks' control pins damaged
1. Selector return spring weak or broken
2. Gearshift forks worn
1. Sliding dogs worn
2. Gear splines worn
3. Sliding dog seats on gears worn
4. Splines gearshift forks' control shaft worn
5. Gearshift forks control pins worn
1. Air filter dirty
2. Carburettor main jet blocked or wrong size (TC, TXC)
3. Poor quality fuel
4. Intake manifold loose
5. Spark plug gap too large
6. Inadequate compression
7. Incorrect valve play
8. Faulty valve guides or seats
9. Valve springs weak or seized
1. Excessive coke on combustion chamber and/or
piston crown
2. Insufficient engine oil, or wrong oil used
3. Radiator air flow blocked
4. Poor seal at cylinder head gasket
5. Clutch slipping
6. Faulty cooling fan (TE, SMR)
C.3
Remedy
Replace
Replace
Replace
Replace
Replace or adjust
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Clean
Clean or replace
Replace
Tighten
Adjust
Find cause
Adjust
Replace
Replace
Clean
Top up or replace
Clean
Replace
Adjust
Replace the thermoswitch