Bedknife Replacement And Grinding - Toro Greenmaster 1000 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. Discard screws. Remove bed-
knife from the bedbar (Fig. 30).
3. Use a scraper to remove all rust, scale and corro-
sion from bedbar surface before installing new bedknife
(Fig. 31).
4. Install bedbar to frame (see Bedbar Installation).
Replacement
1. Make sure bedbar threads are clean.
2. Use new screws. Apply anti–seize lubricant to the
screw before installing.
IMPORTANT: Do not use an impact wrench to tight-
en screws into the bedbar.
3. Using a torque wrench and bedknife screw tool,
tighten screws to a torque of 200 to 250 in–lb (230 to 288
kg–cm). Use a torquing pattern working from the center
toward each end of the bedknife (Fig. 32).
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. 33).
1. Remove bedbar from the mower (see Bedbar Re-
moval).
Note: When grinding, be careful to not overheat the
bedknife. Remove small amounts of material with each
pass of the grinder.
2. Use TORO Sharpening Reel and Rotary Mowers
Manual, Form No. 80-300 PT, for grinding the bedknife.
Bedknife Grinding Specifications
Relief Angle
Relief Angle Range
Front Angle
Front Angle Range
3. Reinstall bedbar to the mower (see Bedbar Installa-
tion).
Cutting Unit
5
3 to 6
15
13 to 17
Page 7 – 16
1
3
Figure 30
1. Screw
2. Bedbar
Figure 31
12 11
9 7 5 3
Figure 32
Relief Angle
Front Angle
Figure 33
2
3. Bedknife
1 2 4 6 8 10 12
Top Face
Front
Face
Greensmaster 1000/1600