Bedknife Replacement And Grinding - Toro GREENSMASTER 3100 Service Manual

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
Front Angle
Front Angle Range
3. Reinstall bedbar to cutting unit (see Bedbar Installa-
tion).
Greensmaster 3100
3_ (see Fig. 15)
NOTE: Relief angle is 7
13_
13_ to 17_
Page 10 - 13
1
3
Figure 13
1. Screw
2. Bedbar
13 11 9 7 5 3
Figure 14
Relief Angle
Front Angle
Figure 15
o
for special "extended" bedknives
Rev. D Dual Point Adjust Cutting units
2
3. Bedknife
1 2 4 6 8 10 12
Top Face
Remove
Burr
Front
Face