-24-
Model T28959 (Mfd. Since 2/19)
Do not touch grinding wheel while it is spin-
ning. Serious injuries to fingers and hands
will occur.
12. Lower grinding wheel into cutter gullet until it
stops, then thread depth knob bolt down until
it reaches depth stop (see
Figure 28).
9. Position edge of advancement guide behind
cutter to be sharpened, then pull chain left
until guide catches and stops chain (see
Figure 27).
Figure 28. Depth stop and controls.
Depth
Knob Bolt
Knob
Lock Nut
Depth Stop
Note: When adjusting depth knob bolt, sharp-
en angles that may be worn or damaged. Do
not make gullet any deeper than necessary.
Also, taking deep cuts with the grinding wheel
could burn the metal, which will damage the
temper of the steel. Chain cutters that are
overheated during sharpening become brittle
and dull quickly. It is better to make a few
light passes than one deep one!
13. Back depth knob bolt away from depth stop
by a
1
⁄
4
turn, then tighten knob lock nut to
secure setting (see
Figure 28).
14. Adjust advancement guide so that chain
moves slightly to right. This will remove a
small amount from top and side plates and
provide sharpened angles.
15. Connect sharpener to power, turn ON, and
wait for grinding wheel to reach full speed.
16. Using a slow and steady pace, lower grinding
wheel into first cutter link until depth bolt hits
stop, then let swing arm raise grinding wheel.
Figure 27. Advancement guide and controls.
Note:
Attaining the proper setting for the
advancement guide requires trial and error.
This setting is critical to properly sharpen
the cutters, so take the time to find the cor-
rect setting. The goal is to position the cutter
in relation to the grinding wheel so that top
plate angle, top plate cutting angle, and gullet
angle will be correctly sharpened.
Guide
Adjustment
Controls
Advancement
Guide
Cutter
10. With machine still disconnected from power,
lower grinding wheel into the gullet.
— If wheel matches gullet profile and is
against top and side plates when com-
pletely lowered, advancement guide is
properly set for now. Tighten knob lock
nut on adjustment controls behind guide
to secure setting.
— If wheel hits top plate or depth gauge and
does not completely lower into gullet, or it
is not against top and side plates, adjust
advancement guide until it successfully
stops chain in proper position. Be sure to
secure setting by tightening knob lock nut.
11. Tighten clamp lever to firmly secure chain
between chain holder clamp plates.
Summary of Contents for T28959
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