2 6 Using Skip Tooth Mode - Oregon 720-120 Original Instruction Manual

5 Operation
II– clockwise to increase the height of the
depth gauge (and therefore grind less
of it), or
III– counterclockwise to decrease
the height of the depth gauge (and
therefore grind more of it).
• Repeat the sharpening test until the
height of the depth gauges is correct. Use
the template provided with the machine
and refer to the top-plate angle chart to
determine the correct height.
17 Set the chain pusher switch to ON. The chain
pusher arm will push the chain forward.
18 Monitor the grinding wheel movements, and
check if the chain is sharpened.
19 If required: Turn the grinding depth knob,
located on the back of the grinding head, to
make minor adjustments for the grinding
depth.
20 If required: Turn the chain pusher
adjustment to make minor adjustments for
the grinding length.
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585124ab_Auto Chain Grinder_OM_720-120.indd 32
21 Set the chain pusher switch to OFF when
the grinding head is in its uppermost
position and the chain lock is not engaged.
IMPORTANT If the chain has double-links,
pull the chain back so that the grinding starts on
the second double-link. If the chain has a joint
with an irregular cutter sequence, start grinding
behind it.

5 2 6 Using skip tooth mode

Oregon 720-120 Auto Chain Grinder has 2 chain
pusher modes:
• The standard mode, used for sharpening
standard chains.
• The skip tooth mode, used for sharpening
3/8" pitch "standard skip sequence
chains" that have twice the distance
between the cutting teeth.
Adjust the chain pusher mode so it accurately
sharpens the type of chain you're using.
To set the machine into skip tooth mode:
1 Use a finger or a tool to press plate B away
from plate A until it unlocks, and then move
it in the direction of the "Skip tooth" arrow.
B
720-120
A
3/1/17 3:05 PM