Echo DCS-2500 Manuel D'utilisation page 30

Maintenance and care
Saw chain maintenance
 Remove the battery before sharpening the chain.
 Always wear gloves when working on chain.
 The following faults will increase the risk of kickback considerably.
 Top plate angle too large
 File diameter too small
 Depth gauge too large
NOTE
These angles are referred to as Oregon 80TXL and SUGIHARA A4S saw chains.
For other branded saw chain, follow it's chain manufacturer's instruction.
1. Left hand cutter
2. Tie strap
3. Right hand cutter
WARNING
CAUTION
4. Depth gauge
5. Drive link
6. Rivet
Properly filed cutters are shown below.
A: Top plate angle 80TXL; 25°, A4S; 30°
B: Top plate cutting angle 80TXL; 70°, A4S; 50°
C: Depth gauge 80TXL; 0.65 mm, A4S; 0.5mm
D: Parallel.
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 dam-
age.
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.
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