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Reelmaster 3550−D
Cutting Units
Page 7 − 22
Bedknife Replacement and Grinding
Bedknife Removal
1. Remove bedbar from cutting unit (see Bedbar Re-
moval in this chapter.
NOTE: 18” cutting units use 6 screws to secure bed-
knife to bedbar. 22” cutting units use 8 screws to secure
bedknife to bedbar.
2. Remove screws from bedbar using a socket wrench
and bedknife screw tool (see Special Tools in this
chapter). Discard screws. Remove bedknife from the
bedbar (Fig. 26).
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. Apply antiseize lubricant
to the threads of new screws. Take care to keep anti-
seize lubricant from taper on screw heads.
IMPORTANT: Do not use an impact wrench to tight-
en screws into the bedbar.
3. Use new screws to secure bedknife to bedbar. Install
all screws but do not tighten fully. Then, using a torque
wrench and bedknife screw tool, torque screws from
200 to 250 in−lb (23 to 29 N−m) for 18” cutting units, or
from 250 to 300 in−lb (29 to 33 N−m) for 22” cutting
units. Use a torquing pattern working from the center to-
ward each end of the bedknife (Fig. 27).
4. After installing bedknife to bedbar, grind bedknife.
1. Screw
2. Bedbar
3. Bedknife
Figure 26
Antiseize
Lubricant
250 to 300 in−lb
(29 to 33 N−m)
Lightly Oil
Bedbar
1
2
3
Surface
18” Cutting Unit Components Shown
Figure 27
124 635
# TOR510880