Mechanical Timber Harvesting Handbook
4
Important Safety Information
Windows
• The glazing of the operator's enclosure window should
comply with local codes for impact resistance. The glazing
should be replaced if any scratches (or other damage)
obstructs the operator's effective viewing of the cutting
operation.
• It should be noted that the UV portion of the light spectrum
degrades the properties of polycarbonates (i.e. through
time your protection decreases). Consult your equipment
manufacturer or replacement glazing supplier for
recommended replacement interval.
• Before upgrading, always check with your equipment
manufacturer as it may change the operational integrity of
the operator enclosure.
Cutting System
A saw chain based cutting system is composed of a drive sprocket,
guide bar, and a loop of saw chain.
• The illustration below is a representation of the drive end of
a cutting system and how the chain catcher and chain shot
guard interrelate.
• Every equipment operator should be aware of the safety
equipment that should always be present in the saw box.
Consult your equipment manufacturer if any of these devices
appear damaged or are missing.
Drive
sprocket
Direction of chain travel
Bar groove
Guide bar
Chain
catcher
Chain
shot
guard
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