Echo CS-301 - Manual (Page 23)

23
SETTING THE SAW CHAIN
For setting saw chains, round file (4 mm: 5/32”) and flat file are used.
• To keep correct position and correct angle, use the file holder.
- Round file and flat file are available from your Echo Dealer.
• File cutters as below.
Type : 91VG
HOLD FILE HOLDER
LEVEL
Depth
gauge
ONE FIFTH OF FILE DIAMETER
REMAINS ABOVE CUTTER EDGE
To sharpen other type chain, follow chain manufacturer’s instructions
30°
PUSH FILE AS SHOWN
Keep this angle
1/5
30°
80° 60°
0.64 mm (0.025”)
Parallel
• Properly filed cutters are shown below.
(Top plate angle) (Side plate angle) (Top plate cutting angle) (Depth gauge)
• When setting of the chain is finished, soak it in oil and wash away filings completely before using.
• When chain has been filed on the bar, supply sufficient oil to it, rotate the chain slowly to wash away the filings
before using again.
• If the chain saw is operated with filings clogged in the groove, the saw chain and the guide bar will be damaged
prematurely
• If the saw chain becomes soiled with resin, for instance, clean it with kerosene and soak it in oil.
• Place the depth gauge tool firmly on guide bar so that depth gauge protrudes. Then file top of depth gauge with flat
file until flat with top of the gauge tool.
- Be sure to round off the front edge of the depth gauge.
Depth gauge
tool
Remove
until flat
with tool
Round
off the
edge
91
Number indi-
cates Chain
type
Number
indicates
Chain type
91S
(SPROCKET)
(DRIVE LINK)
CHAIN TYPE AND SPROCKET PITCH
Saw chain should be used with corresponding pitched
sprocket. To identify chain type and pitch of sprocket,
check as follows.
• Chain type number (A) is stamped on drive link.
• Sprocket pitch (B) is stamped on clutch drum.
A
B