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Section 5: Maintenance & Lubrication
11/11/12
RCB6610 & RCBM6610 Series 2 S/N 944730+ Rotary Cutters 330-584M
Table of Contents
5. Both blades should be sharpened at the same angle
as the original cutting edge and must be replaced or
re-ground at the same time to maintain proper
balance in the cutting unit. The following precautions
should be taken when sharpening blades:
a. Do not remove more material than necessary.
b. Do not heat and pound out a cutting edge.
c. Do not grind blades to a razor edge. Leave a blunt
cutting edge approximately 1/16" thick.
d. Always grind cutting edge so end of blade remains
square to cutting edge and not rounded.
e. Do not sharpen back side of blade.
f. Both blades should weigh the same with not more
than 1 1/2 oz. difference. Unbalanced blades will
cause excessive vibration which can damage
gearbox bearings and create structural cracks.
Refer to Figure 5-7 & Figure 5-8:
6. Carefully check cutting edges of blades in relation to
blade carrier rotation to ensure correct blade
placement. Cutter blades must be installed with
cutting edge leading in rotation.
Refer to Figure 5-6 on page 42:
7. Insert blade bolt (#1) through blade (#6),
dishpan (#4), and flat washer (#2). Secure blade with
a new lock nut (#3) and torque to 450 ft-lbs.
8. If replacing RC56 Series dishpan (#4) or RC66
Series blade bar (#10), nut (#7) on gearbox output
shaft should be torqued to 550 ft-lbs. minimum and
secured with cotter pin (#8) with both legs bent
opposite directions around the nut.
9. Replace rubber plug (#5).
10. Reconnect main driveline to tractor PTO shaft and
remove support blocks.
IMPORTANT: Examine blade bolts and their flat
washers for excessive wear and replace if worn.
IMPORTANT: Locknuts can lose their ability to lock
properly once removed. Always use a new locknut
when installing blades.
Standard Blade Rotation
Figure 5-7
Special Reverse Blade Rotation
Figure 5-8
CCW
CCW
27590
CW
CW
30247