Shindaiwa BP510S Operator's Manual page 28

Maintenance and care
Checking the nylon line cutting head
Replacing nylon line
Shut down trimmer engine without fail and make sure nylon line cutting head has stopped rotating before starting
replacement procedure.
To do so could lead to an accident or serious injury.
Use only flexible, non-metallic line recommended by YAMABIKO CORPORATION.
Failure to do so could lead to an accident or serious injury.
1. Make sure each periphery of the 2 retaining pawls of housing
spreads almost fully up to the outer periphery of the respec-
tive cover window.
2. Check mount of cutting head on trimmer and tighten if it is
loose.
3. Check the cutter head for deflection or abnormal noise rotat-
ing it by hand. Deflection or abnormal noise can cause ab-
normal vibration to occur or mount to trimmer to loosen
during rotation which is dangerous.
4. Inspect cover and tap knob for wear. When slot appears on
bottom of the tap knob or when slot appears on cover bottom
close to outlet for nylon line, replace them with new parts
without fail.
5. Check the cutting head for crack or chip. Replace parts that
show any crack or chip with new ones without fail.
DANGER
WARNING
1. Press "retaining pawls" (at two places) inward and remove
cover. It is easier to remove one after another.
2. Remove spool.
3. When nylon line on the spool is almost exhausted, remove
remaining line from spool and wind "new line" according to
the procedures (4) and beyond. When the line on the spool
is "melted and stuck" remove the entire line while peeling off
the "melted and stuck" portion and wind the "removed line"
anew according to procedures (4) and beyond.
4. Bend the line at the point 12 cm away from the middle of
whole length and hook the bent portion into the "notch" of the
intermediate separator.
5. Wind the line firmly into groove of the spool following "wind-
ing direction for the arrow".
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