Adjustments - Ryobi TR31 Operator's Manual

INSTALLING/REMOVING CUTTERS
See Figure 3.
UNPLUG YOUR TRIMMER.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.
Place your trimmer upside down on a workbench in order
to gain easy access to the spindle and collet nut.
Place the small end of one of the wrenches provided on
the spindle flats. This will hold the spindle stationary.
Place the large end of the other wrench provided onto the
collet nut. Rotate wrench counterclockwise to loosen
collet nut. See Figure 3.
WARNING:
If you are changing a cutter immediately after use, be
careful not to touch the cutter or collet with your hands or
fingers. They will get burned because of the heat buildup
from cutting. Always use the wrench provided.
If installing cutter for the first time, it can be installed once
collet nut is loose. If changing cutters, cutter will easily slip
from collet after loosening collet nut.
The collet is machined to precision tolerances to fit cutters
with 1/4 in. (6.4 mm) diameter shanks.
With your trimmer still upside down on a workbench, insert
shank of cutter into collet. The shank of your cutter should
be close to but not touching bottom of collet. This allows
for expansion when the cutter gets hot.
Tighten the collet nut securely by turning clockwise with
the wrench provided. See Figure 3.
WARNING:
If collet nut is not tightened securely, cutter may come
out during use, causing serious personal injury.
WARNING:
Avoid open area of trimmer base. Serious personal injury
will result from contact with a rotating cutter.
TO SET DEPTH OF CUT
See Figure 4.
UNPLUG YOUR TRIMMER.
WARNING:
Failure to unplug your trimmer could result in accidental
starting causing serious injury.

ADJUSTMENTS

WRENCH ON
COLLET NUT
INDICATOR
POINT(S)
WING
BOLT
Loosen the wing bolt and move the base until the tip of
cutter touches the work surface. The depth of cut is zero
at this point. See Figure 4.
Position your trimmer so that the cutter can extend below
the subbase for desired depth of cut setting.
Move the base to obtain the desired depth of cut. The
distance the cutter moves can be read on the depth of cut
scale. Each mark on the scale indicates a 1/16 in. (1.6 mm)
change in depth setting. Indicator points are located on the
base.
Securely tighten the wing bolt.
Page 8
CUTTER
WRENCH ON
SPINDLE FLATS
DEPTH OF
CUT SCALE
1
3/ 4
1/ 2
INDICATOR
POINT(S)
Fig. 3
1
3/4
1/2
1/4
0
Fig. 4