Bedknife Replacement And Grinding - Toro Reelmaster 5200-D Service Manual

Bedknife Replacement and Grinding

Replacement
1. Remove bedbar.
2. Remove bedknife screws and remove bedknife.
3. Remove all rust, scale and corrosion from bedbar
surface before installing the new bedknife.
4. Install new bedknife as follows:
A. Make sure bedbar threads are clean.
B. Use new bedknife screws (Toro Part No.
57-4910). Apply anti-seize lubricant to the screw
threads before installing.
IMPORTANT: Do not use an air or manual impact
wrench.
C. Bedknife screws must bottom out on the bed-
knife, not the bedbar. Tighten screws to a torque of
180 to 200 in-lb (20.3 to 22.6 N-m); work from the
center toward each end of the bedbar (Fig. 34)
NOTE: Since there can be variations in the mounting
surface of the bedbar, a new bedknife will not be perfect-
ly 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 bedknife and grind only enough to make sure the top
surface is true.
NOTE: For proper grinding of bedknife, follow proce-
dures in the Toro Sharpening Reel and Rotary Mowers
Book, Part No. 80300SL.
Note: When grinding, be careful to not overheat the
bedknife. Remove small amounts of material with each
pass of the grinder.
Note: If the height of cut is a 1/2 inch or lower on the
cutting unit, the front angle can be increased to 30_ for
improved performance.
5. Grind bedknife.
6. Install bedbar and tighten bedbar mounting bolts to
35 to 40 ft-lbs (47 to 54 Nm).
Reelmaster 5200-D/5400-D
7 5
Bedknife Regrinding Specifications
Relief Angle
Front Angle
Page 8.1 - 19
Rev. A
3 1 2 4
Figure 34
Top Face
Relief Angle
Front
Face
Front Angle
Figure 35
 2_
10_
 2_
15_
(If the height of cut is a 1/2 inch
or lower on the cutting unit, the
front angle can be increased to
30_ for improved performance)
Cutting Units
(Model 03527, S/N 210000001 & Up)
(Model 03528, S/N 210000001 & Up)
6