Section 5: Maintenance & Lubrication
RC3614 & RCM3614 Rotary Cutters 330-918M
1/20/21
44
Cutter Blade Assembly
Figure 5-5
Direction of Blade Rotation
Figure 5-6
33871
Use 1-11/16"
Socket Wrench
On Blade Nut #3
Land Pride Cutter Blade Parts
# Part No. Part Description
318-586A BLADE BOLT KIT (Item No’s 1, 2, & 3)
1 802-277C BLADE BOLT 1 1/8-12 x 3 7/16 WITH KEY
2 804-147C WASHER FLAT 1 HARD ASTMF436
3 803-170C NUT HEX TOP LOCK 1 1/8-12 PLATE
4 330-796H BLADE CARRIER
5 840-273C PLUG LP 3" ID RUBBER
6 820-249C CUTTER BLADE, CW (Center Deck)
6 820-249C CUTTER BLADE, CW (Right Wing)
CW
CW
Refer to Figure 5-5:
7.
Remove rubber plug (#5) above cutter blade (#6).
Rotate blade bolt (#1) until in alignment with access
hole (A).
8. Unscrew locknut (#3) to remove cutting blade (#6).
Blade bolt (#1) is keyed and will not turn freely.
9. 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 5-6:
10. 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 5-5:
WARNING
!
To avoid 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.
11. Insert blade bolt (#1) through blade (#6),
dishpan (#4), and flat washer (#2). Secure blade with
a
new locknut (#3)
and torque to 450 ft-lbs.
12. If replacing dishpan (#4), 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.
13. Replace rubber plug (#5).
14. Reconnect main driveline to the tractor power take-
off shaft and remove support blocks.
IMPORTANT:
