Echo SRM-2305 Operator's Manual page 14

Blade retainer
Blade
Lower blade retainer
Cup
Nut
Blade retainer fixing slot
INSTALLING BLADE
Inspect blades before installation. Check for sharpness.
Dull blades increase the risk of blade kickback reactions.
Small cracks can develop into fractures resulting in a piece
of blade flying off during operation.
Discard cracked blades no matter how small the crack.
Blade retainer, blade, lower blade retainer, cup and nut
finger tight.
Tighten the nut (turn anticlockwise) using a socket wrench.
Never fasten while applying your weight. Otherwise the
thread of nut could be broken.
Replace nut and cup with new ones no matter how small
the wear is.
WARNING
IF WORN NUT AND CUP FOR BLADE ARE USED,
THERE IS A DANGER OF BLADE GETTING
LOOSE. REPLACE THEM WITH NEW ONES.
CAUTION
Wear gloves to reduce the risk of injury caused
by unintentional contact with the blade.
Blade retainer fixing slot
Blade retainer
Washer
INSTALLING NYLON LINE CUTTING
ATTACHMENT
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.
SRM-2305
Socket wrench
Blade
DANGER
Nylon line cutting attachment
Blade
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.
CAUTION
Fasten output shaft using locking tool securely in
order to avoid the possibility of output shaft
rotating when mounting cutting blade which will
prevent the cutting blade fastening nut from
being tightened sufficiently.
METHOD TO CHANGE SHIELD
(FOR NYLON LINE)
Remove screw (M5×18) on the right side of the shield
and slide the shield to the left and remove it. Put shield
of another type into groove and slide it to the right until it
stops and be sure to fasten with the removed screw
(M5×18).
Nylon line cutting attachment
Locking tool
CAUTION
Fasten output shaft using locking tool securely in
order to avoid the possibility of output shaft
rotating when mounting nylon line cutting
attachment.
Thread cutting attachment onto shaft (anticlockwise)
until it is tight.
Remove locking tool.
14
Locking tool
Cut off knife
Screw
M5×18
Screw
5×12
Bracket
Shield