Oregon 720-120 Original Instruction Manual page 30

5 Operation
7 Visually make sure that the chain pusher
stops its movement exactly above the rivet
behind the cutter, as illustrated in the image
below.
8 Set the chain pusher switch to OFF when
the grinding head is in its uppermost
position and the chain lock is not engaged.
9 Repeat steps 5-9 until the chain pusher
stops in the correct position.
CAUTION If the pitch is not correctly set,
the chain will be pushed into an incorrect
sharpening position. This may result in a
damaged chain.
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585124ab_Auto Chain Grinder_OM_720-120.indd 30
10 Turn the grinding speed knob to set the
desired speed for the machine.
IMPORTANT If the metal of a cutter
turns blue during grinding, the speed is set
too high and the metal is overheated. This
can cause the metal in the cutter to lose its
properties. Replace the damaged cutter or
re-sharpen the chain.
11 Fold the grinding head down to its grinding
position.
12 The grinding depth for gullets is
recommended by the chain manufacturer.
To set it, turn the grinding depth knob
located on the back of the grinding head:
• clockwise, to grind shallower into the
gullet, or
• counterclockwise, to grind deeper into the
gullet.
720-120
3/1/17 3:05 PM