Using A Brushcutter With A Trimmer Head; Maintenance - Shindaiwa B450 Owner's/Operator's Manual

Using a Brushcutter With a Trimmer Head

You may install one of several types of Shin-
daiwa trimmer heads on your TC350/B450
trimmer or brushcutter, each with features
for specific applications and/or operational
requirements.
For proper operation, always refer to the
instructions accompanying the trimmer
head being used. Available trimmer head
styles include:
 Semi-automatic. Trimmer line is
indexed when the operator taps the trim-
mer head on the ground during opera-
tion.
 Manual. The operator indexes line man-
ually with the grass trimmer stopped.
 Fixed. The operator must stop the unit
and add new lengths of trimmer line
manually.
 Flail. This device, designed for clearing
weeds and light brush, features three
nylon blades attached to the head by
pivots.
CAUTION!
Do not push the rotating line into trees,
wire fences or any material that could
tangle or break line ends.
16
Engine Operating Speeds
Operate at full throttle while cutting grass.
CAUTION!
Operation at low rpm can lead to pre-
mature clutch failure.
Trimming and Mowing Grass
Hold the grass trimmer so the trimmer
head is angled slightly into the area to be
cut. To ensure maximum trimmer-line
service life, cut only with the tip of the trim-
mer line. Cut grass by swinging the unit's
trimmer head from left to right. Keep the
trimmer head horizontal.
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23041
Edging
Tilt the handle about 100° to the left (from
horizontal) and move forward, holding the
trimmer or brushcutter vertically as shown.
23042

Maintenance

sure the engine and cutting attachment
are completely stopped. Disconnect
the spark plug wire before performing
service or maintenance work.
ing, or by modifying its shape. An
altered blade may break during op-
eration, resulting in serious personal
injury.
CUTTING
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Daily Maintenance
Prior to each work day, perform the
following:
 Remove the dirt and debris
from the engine, check the
cooling fins and air cleaner
for clogging, and clean them
as necessary.
 Carefully remove any
accumulations of dirt or
debris from the muffler and
fuel tank. Dirt buildup in
these areas can lead to
engine overheating, fire, or
premature wear.
 Check for loose or missing
screws or components. Make
sure the cutting attachment
is securely fastened.
 Check the machine for
leaking fuel or grease.
WARNING!
Before performing any main-
tenance, repair, or cleaning
work on the machine, make
WARNING!
Never repair a damaged
blade by welding, straighten-