Elem Garden Technic TRACT84-AR Traduction Des Instructions Originales page 142

6.3.5 Dismantling, replacing and remounting the blade
never try to repair them! ALWAYS USE MANUFACTURER'S GENUINE
REPLACEMENT BLADES BEARING THE SYMBOL!
SHARPENING THE BLADE
Check that the blade is sharpened properly and firmly fixed to the bracket.
-- - A badly sharpened blade pulls at the grass and causes the lawn to turn yellow.
-- - A loose blade causes unusual vibrations and can be dangerous.
WARNING!
All operations on the blade (dismantling, sharpening,
balancing, remounting and/or replacing) require a certain familiarity and
special tools. For safety reasons, go to a specialized centre if you do not
have the right tools or experience.
2 blades -> Ref 692312(
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Always wear work gloves when handling the blade.
Damaged or bent blades must always be replaced;
Φ 43 mm blades R), Ref 692313( Φ 43 mm blades L),