Service Manual

Greensmaster 3320/3420
DPA Cutting Units
Page 8 − 18
Bedknife Replacement and Grinding
Bedknife Removal
1. Remove bedbar from cutting unit (see Bedbar Re-
moval in this section).
2. Remove screws from bedbar using a socket wrench
and bedknife screw tool (see Special Tools in this chap-
ter). Discard screws. Remove bedknife from the bedbar
(Fig. 20).
3. See bedknife grinding information on the following
pages.
Bedknife Installation
1. Use scraper to remove all rust, scale and corrosion
from bedbar surface. Lightly oil bedbar surface before
installing bedknife.
2. Make sure that screw threads in bedbar
(5/16−18UNC−2A) are clean.
IMPORTANT: Do not use an impact wrench to tight-
en screws into the bedbar.
3. Use new screws to secure bedknife to bedbar. Apply
antiseize lubricant to the threads of new screws. Do not
apply antiseize lubricant to the taper of the screw heads.
4. Install all screws but do not tighten.
5. Using a torque wrench and bedknife screw tool,
tighten the 2 outer screws to 10 in−lb (1 N−m).
6. Working from the center of the bedknife toward each
end (Fig. 21), tighten screws from 200 to 250 in−lb (23
to 28 N−m).
7. After installing bedknife to bedbar, grind bedknife.
1. Screw (13)
2. Bedbar
3. Bedknife
Figure 20
2
1
3
Antiseize
Lubricant
200 to 250 in−lb
(23 to 28 N−m)
Lightly Oil
Bedbar Surface
Figure 21
34 681057911 12 14
1315
# TOR510880
1st − 10 in−lb (1 N−m)
2nd − 200 to 250 in−lb (23 to 28 N−m)
12