Timing Chain Assembly; Subsequent Actions; Chain, Chain Sprocket Check; Timing Chain Check - Husqvarna TC449 Workshop Manual

H01890
H01760
ENGINE DISASSEMBLY/REASSEMBLY

Timing chain assembly

• Lubricate timing chain (1), and fit it onto countershaft gear (2) working through
crankcase from top.
Consumables
Molykote D Paste

Subsequent actions

Valve clearance check

Chain, chain sprocket check

Check
• Check timing chain for damages and wear.
Result: Worn or damaged timing chain.
Action:
• Replace timing chain.
Check
• Check gear and chain sprocket for damages and wear.
Result: Figure 1: no distortion or min. teeth distortion.
Action:
• Wheel, chain and sprocket are in good conditions.
Result: Figure 2: teeth distortion.
Action:
• Change chain and gear.
Result: Figure 3: heavily worn teeth.
Action:
• Change chain and gear.
Check
• Check camshaft for damages and wear.
Result: Worn or damaged camshaft.
Action:
• Replace camshaft.

Timing chain check

Check
• Check timing chain for damages and link smoothness.
Result: Damaged timing chain or with hard links.
Action:
• Replace timing chain.
F1.60
Clear solid lubricant
for metal part
assembling and
settling
1 edition (08-2010) _Rev. 11-2010
st