Oregon 511A Instruction Manual page 2

O W N E R ' S I N F O R M A T I O N A N D R E S P O N S I B I L I T Y
SAFETY SYMBOLS AND WARNINGS
The following symbols are used to draw special attention to operator and/or
bystanders to help prevent possible injury. Also designed to help prevent
mechanical failure or damage to the machine and/or product.
Wear hand protection
INSTALLING/DRESSING THE GRINDING WHEEL
A grinding wheel that has been
improperly installed may crack and
disintegrate during operation resulting
in severe injury to the operator.
A damaged grinding wheel may
disintegrate during use due to high-
speed operation of the unit. This can
cause wheel fragments to eject at very
high rates of speed.
Always maintain proper grinding wheel
maintenance, check for visible cracks
and perform a "ring test." (A good
grinding wheel will sound a clear musical
tone when tapped gently with a metal tool
like an Allen wrench.) See Fig 8, page 7.
Do not force a grinding wheel onto the
machine or alter the size of the mounting
hole. Do not use a wheel that does not fit
exactly. We recommend use of Oregon
grinding wheels only.
Make sure the mounting-flange nut is
serviceable and not damaged in any way.
If grinding wheel vibration should occur
when the grinder is started, or running,
remove and inspect the mounting flange
and the grinding wheel.
There is the risk of severe personal injury
from high speed ejection of material.
Read and follow all instructions in this
manual. Wear eye and hand protection.
®
Wear eye protection
To avoid possible grinding-wheel failure,
always allow a new grinding wheel to run
at operating speed for at least one minute
before grinding or dressing.
The hazard of kickback resulting in serious
injury to operator is increased if cutting
chain guard drive links or guard tie straps
have been reversed, removed, or filed
down. To avoid injury Do not use a cutting
chain that has been altered in any way.
Cutting chain depth gauges not properly
filed can substantially increase the risk of
kickback and injury. To reduce likelihood
of injury, always file depth gauges to
original profile.
Dressing the grinding wheel places the
fingers of the operator in close proximity
to the grinding wheel. Contact with a
rapidly turning wheel may result in injury.
Wear gloves.
Always work cautiously, maintain a strong
grip on the dressing brick, and watch
what you are doing at all times.
Do not use the side of the grinding wheel
for grinding.