Echo SRM-3611T Operator's Manual page 28

Maintenance and care
6. When the line is wound to the end hook both line ends into
respective notch of spool for retaining tentatively the line
while leaving line ends approximately 10 cm beyond notch.
7. Align notches of spool for the line with grooves of eyelets
and fit spool into cover.
8. Pull out the line from cover. (A) Remove the line from "re-
spective notch of spool", and (B) pass it through "groove of
respective eyelet".
9. Fit cover and housing together. (C) Align "eyelets" of cover
with "recesses" of housing, and (D) press pawls of housing
into respective window of cover until the pawls are firmly fit-
ted into the windows.
Make sure each outer periphery of pawls of housing
spreads almost fully up to the outer periphery of respec-
tive window of cover. If they are loosely fitted and the cut-
ting head is turned, cover or inside components can fly off
which is dangerous.
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DANGER