Saw Chain Maintenance - Echo CS-680 Operator's Manual

Switch off the engine before sharpening the chain.
Always wear gloves when working on chain.
The following faults will increase the risk of kickback considerably.
1) Top plate angle too large
2) File diameter too small
3) Depth gauge too large
NOTE
These angles are referred to as Oregon 73LGX and Carlton A2LM saw chains.
For other branded saw chain, follow it's chain manufacturer's instruction.
Properly filed cutters are shown below.
A: Top plate angle A2LM; 30°, 73LGX; 25°
B: Top plate cutting angle A2LM; 60°, 73LGX; 55°
C: Depth gauge A2LM; 0.71 mm, 73LGX; 0.65 mm
D: Parallel
1. Left hand cutter
2. Tie strap
3. Right hand cutter
4. Depth gauge
5. Drive link
6. Rivet
Never operate a chain saw with a dull or damaged chain.
If the chain requires excessive pressure to cut or produces dust instead of wood chips then
inspect the cutters for damage.
When sharpening the chain the objective will be to maintain the same angles and profiles
throughout its life as when it was new.
Inspect the chain for damage or wear every time you refuel your chain saw.

Saw chain maintenance

WARNING
CAUTION
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