7 Installing The Grinding Wheel - Oregon 720-120 Original Instruction Manual

4 Installation

4 7 Installing the grinding wheel

Note: The first step in preparing the grinder for
use is installing the appropriate grinding wheel.
1 The grinder comes with 2 wheel sizes:
1/8" (3.2 mm) and 3/16" (4.8 mm).
These wheels are 5 7/8" (150 mm) in
diameter with 5/8" (16 mm) arbor size.
It is critical to select the wheel of the
appropriate thickness for each chain.
2 The correct wheel size for a particular
Oregon saw chain can be found in
several sources: this manual, the back
of the Oregon chain packaging, Oregon
Maintenance and Safety Manual, or
online at OregonProducts.com.
WARNING Inspect the grinding wheel
and make sure that it is not cracked or
damaged. There is a simple test (called the
"ring test") that you can do to check for
damage to a grinding wheel. Hold the
grinding wheel up by its center hole. Knock
the edge of the grinding wheel gently with a
non-metallic object (like the plastic handle
of a screwdriver). If the grinding wheel
makes a dull, non-metallic noise, then the
wheel could be damaged. DO NOT USE IT.
CRACKED GRINDING WHEELS MUST BE
REPLACED IMMEDIATELY. See also section
6.3, "Change the grinding wheel and fit the
grinding wheel guard."
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3 Once the grinding wheel has been verified,
you're ready to begin the install.
4 Start by removing the grinding wheel shield
(C) to access the wheel attachment nut (B).
Use the provided Allen wrench to loosen the
retaining screw (D).
A
5 Remove the wheel attachment nut from
the hub.
720-120
D
C
B
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