Echo SRM-410ES Operator's Manual page 21

1. Bracket
2. Bolt
3. Button
1. Blade retainer fixing slot
2. Blade retainer
1. Locking tool
4. Shield (for nylon line
cutting head)
5. Shield (for metal
blade)
3. Washer
4. Nylon line cutting head
2. Nylon line cutting head
Before you start
Method to change shield
There are two types of shields: namely the one used exclusively
for nylon line cutting head and the other one used exclusively for
metal blade. When metal blade is used, use the shield for metal
blade.
Fully loosen the bolt on the right side of the bracket to slide the
shield. The bolt itself cannot be removed from the bracket. Push-
ing the button, slide the shield to the left and remove it. Put shield
of other type into groove and slide it to the right until it stops. Be
sure to tighten the bolt.
Installing nylon line cutting head
Use only flexible, non-metallic line recommended by
YAMABIKO CORPORATION.
Fasten output shaft using locking tool securely in order
to avoid the possibility of output shaft rotating when
mounting nylon line cutting head.
Insert locking tool into a hole located on the right side of angle
transmission while forcing retainer spring to the left side. Insert
locking tool further into blade retainer fixing slot to fix output shaft.
Thread nylon line cutting head onto shaft (anticlockwise) until it is
tight.
Remove locking tool.
Nylon line cutting head
Type: DS-5
Thread: Left-hand thread M10×1.25 pitch
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CAUTION