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Greensmaster 3100
Dual Point Adjust Cutting units
Page 10 - 13
Bedknife Replacement and Grinding
Removal
1. Remove bedbar from frame (see Bedbar Removal).
2. Remove screws from bedbar using a socket wrench
and bedknife screw tool (see Special Tools). Discard
screws. Remove bedknife from the bedbar (Fig. 13).
3. Use scraper to remove all rust, scale and corrosion
from bedbar surface before installing bedknife.
Replacement
1. Make sure bedbar threads are clean. Use new
screws. Apply clean SAE 30 oil to the screws before
installing.
IMPORTANT: Do not use an impact wrench to tight-
en screws into the bedbar.
2. Using a torque wrench and bedknife screw tool,
tighten screws to a torque of 200 to 250 in–lb (22 to
28 Nm). Use a torquing pattern working from the center
toward each end of the bedknife (Fig. 14).
3. Install bedbar to frame (see Bedbar Installation).
Grinding
Since there can be variations in the mounting surface of
the bedbar, a new bedknife will not be perfectly flat after
it is installed. Because of this, it is necessary to backlap
or grind a new bedknife after installing it to the bedbar.
Follow the existing angle that was ground into the bed-
knife and grind only enough to make sure the top surface
is true (Fig. 15).
1. Remove bedbar from the cutting unit (see Bedbar
Removal).
Note: When grinding, be careful to not overheat the
bedknife. Remove small amounts of material with each
pass of the grinder.
2. Use Toro Service Training Book, Sharpening Reel
and Rotary Mowers (part no. 80300SL) for bedknife
grinding information.
Bedknife Grinding Specifications
Bedknife relief angle
3_ (see Fig. 15)
Front Angle
13_
Front Angle Range
13_ to 17_
3. Reinstall bedbar to cutting unit (see Bedbar Installa-
tion).
1. Screw
2. Bedbar
3. Bedknife
Figure 13
1
2
3
12 46 83579 10 12
1113
Figure 14
Figure 15
Relief Angle
Front Angle
Top Face
Front
Face
Remove
Burr
NOTE: Relief angle is 7
o
for special "extended" bedknives
Rev. D