Oregon Harvester - Drive Sprocket Alignment

Drive Sprocket
Mechanical Timber Harvesting Handbook 96
Drive Sprocket Alignment
3/4"-Pitch Drive Sprockets
Rims HarvesterLok®
• Our 3/4"-pitch drive sprockets are available in two types:
Rims and HarvesterLok®.
• Unlike rim drive sprockets on chainsaws that float and
self-align, harvester rim drive sprockets are fixed.
• Improper drive sprocket alignment can result in a thrown loop
of saw chain. It may be necessary to use shims to ensure
proper alignment of the drive sprocket groove with the guide
bar’s groove.
• Alignment can be checked using an Oregon Harvester Multi-
Purpose tool.