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Rev. A
Greensmaster 3320/3420
DPA Cutting Units
Page 8 - 19
Bedknife 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 to the bedbar. Because of this, it is neces-
sary to grind a new bedknife after installing it to the bed-
bar. Follow the existing angle that was ground into the
bedknife and grind only enough to make sure the top
surface of thebedknife istrue and perfectlyflat (Fig.20).
NOTE: When grinding the bedknife, be careful to not
overheat the bedknife. Remove small amounts of mate-
rialwith eachpass of the grinder.Also, cleanand dress
grinding stone often during the grinding process.
1. Use Toro GeneralService Training Book, Reel Mow-
er Basics (part no. 09168SL) and grinder manufactur-
er’s instructions for bedknife grinding information.
2. After bedknife grinding is complete, install bedbar to
cutting unit (see Bedbar Assembly in this section).
Figure 19
12 4683579 10 12
1113
# TOR510880
Figure 20
Relief Angle
Front Angle
Top Face
Front
Face
Remove
Burr
Bedknife Grinding Specifications (see Fig. 20)
Standard bedknife relief angle 3
o
(see Fig. 21)
Fairway bedknife relief angle 3
o
(see Fig. 21)
Extended bedknife relief angle 7
o
(see Fig. 21)
Front Angle (all bedknife types) 13
o
Front Angle Range 13
o
to 17
o
Figure 21
1.708” (43.4 mm)
Standard Bedknife
Fairway Bedknife
1.689” (42.9 mm)
1.876” (47.7 mm)
Extended Bedknife
DPA Cutting
Units