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X7502310908
© 03/2014 ECHO Inc.
SRM-280U
ASSEMBLY
3. Thread line head (J) onto PTO shaft by turning it
counter-clockwise until head is tight against upper plate (A).
4. Remove locking tool (G).
Semi-automatic nylon line heads must be used only with plastic
debris shield with cut-off knife. Using nylon line heads with
metal debris shield can result in trimmer damage, caused by
operation with excessive line length.
Note: Your nylon line head may appear different than nylon line head shown.
To Advance Trimmer Line
See Maintenance Section for nylon line replacement.
Note: To advance trimmer line, tap trimmer head against the ground while the head is turning at normal
operating speed.
Remove Nylon Line Head
Note: Do not disassemble nylon line head.
1. Align locking hole in upper plate with notch in edge of gear
housing and insert head locking tool (G).
2. Remove line head (J) by turning it clockwise until head is
completely off of shaft.
3. Remove locking tool (G).
Blade Installation
You must install the U-Handle and all Blade Conversion parts shown in the following instructions
before operating this unit with a metal blade, otherwise serious injury may result.
Note: includes U-Handle, and necessary blade conversion parts. Blades must be selected for type of
cutting being performed. See “Blade Selection.”
Install Metal Shield
1. If installed remove nylon line head, upper fixing plate, shield
plate, and plastic shield.
Parts Required:
Metal Shield, Shield Bracket,
3 - 5 x 16 mm screws (metal shield
to gear housing).
2 - 5 x 8 mm screws, 2 - 5 mm nuts,
2 - 5 mm lockwashers, (bracket to
shield).
2 - 5 mm nuts, 2 - 5 mm lockwashers
(bracket to gear housing)
G
J
G
J
H
G
J
