Land Pride RC4710, Operator'S Manual

Page: 52 / 72

Section 5: Maintenance & Lubrication
RC(L)4710 & RCM(L)4710 Rotary Cutters 334-863M 7/31/20
48
Table of Contents
Remove cutting blades and sharpen or replace:
1. Secure cutter deck in the up position with solid,
non-concrete supports before servicing underside of
cutter.
2. Shut tractor down properly before dismounting. Refer
to
“Tractor Shutdown Procedure”
on page 15.
3. Disconnect main driveline from the tractor.
Refer to Figure 5-11 on page 49:
4. Remove rubber plug (#11). Rotate dishpan (#4) until
blade bolt (#1) aligns with access hole (A).
5. Unscrew locknut (#3) to remove cutter blade (#10).
Blade bolt (#1) is keyed and will not turn freely.
6. 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" (2 mm) 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. (0.04 kg) difference. Unbalanced
blades will cause excessive vibration which can
damage gearbox bearings and create structural
cracks.
7. Ensure blades are installed with cutting edge leading
in rotation.
a. RCL4710 and RCLM4710 models will have
cutting edge of blades leading in a counter
clockwise rotation. See figure Figure 5-9 on page
48.
a. RC4710 and RCM4710 models will have cutting
edge of blades leading in a clockwise rotation.
See figure Figure 5-10 on page 48.
Refer to Figure 5-11 on page 49:
WARNING
!
To prevent serious injury or death:
A locknut that has been removed can lose its thread locking
properties. Reusing a used locknut can result in a thrown
blade. Always use a new locknut when installing blades.
8. Insert blade bolt (#1) through blade (#10),
dishpan (#4), and flat washer (#2). Secure blade with
a new locknut (#3) and torque to 450 ft-lbs (610
N· m
).
9. Replace rubber plug (#11).
10. Reconnect main driveline to tractor power take-off.
IMPORTANT:
Examine blade bolts and their flat
washers for excessive wear and replace if worn.
RCL(M) Blade Rotation
Figure 5-9
RC(M) Blade Rotation
Figure 5-10
72511
Cutting edge
Rear of Cutter
CCW ROTATION
CCW ROTATION
30247
Cutting edge
CW Rotation
CW Rotation
Rear of Cutter