Oregon Harvester - Replacing Nose Sprockets on HS Harvester Guide Bars

Guide Bar
79 Mechanical Timber Harvesting Handbook
Sprocket Nose Replacement: HS
Replacing Nose Sprockets on HS Harvester
Guide Bars
Select a new Harvester nose sprocket with the correct gauge for
your guide bar and saw chain.
1. Using a 1/4" drill bit, drill out head
from each of the nose sprocket
rivets.
2. Punch out the remainder of the
rivets. Use a punch narrow enough
to keep from damaging the rivet
holes in the nose of the guide bar.
3. Use a small screwdriver to spread
the guide bar nose rails just
enough to remove the old nose
sprocket. Clean debris from the
sprocket area.
WARNING: Wear eye protection and gloves.