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Section 5: Maintenance & Lubrication
RC2512 Series 2 S/N Rotary Cutters 330-725M
10/7/21
2. Disconnect main driveline from tractor power take-off
and secure cutter deck in the up position with solid
supports before servicing underside of cutter.
Refer to Figure 5-1:
3. Remove rubber plug (#5) above cutter blade (#6).
Rotate blade bolt (#1) until in alignment with access
hole (A).
4. Unscrew locknut (#3) to remove cutting blade (#6).
Blade bolt (#1) is keyed and will not turn freely.
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" (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. difference. Unbalanced blades will
cause excessive vibration which can damage
gearbox bearings and create structural cracks.
Refer to Figure 5-2:
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 5-1:
WARNING
!
To avoid serious injury or death:
Locknuts can lose their ability to lock properly once removed.
Always use a new locknut when installing blades.
7. Insert blade bolt (#1) through blade (#6),
dishpan (#4), and flat washer (#2). Secure blade with
a
new locknut (#3)
and torque locknut to 450 ft-lbs
(610 Nm).
8. If replacing dishpan (#4), nut (#7) on gearbox output
shaft should be torqued to 450 ft-lbs (610 Nm)
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 power take-off
shaft.
IMPORTANT:
Examine blade bolts and their flat
washers for excessive wear and replace if worn.
Cutter Blade Assembly
Figure 5-1
Blade Rotation
Figure 5-2
30628
Use 1-11/16"
Socket Wrench
On Blade Nut #3
Blade Bolt Kit & Dishpan Part No’s.
Item 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 PN
3
803-170C NUT HEX TOP LOCK 1 1/8-12 PLATE
4
DISHPAN (See Parts Manual for Part No.)
5
840-273C PLUG LP 3" ID RUBBER
6
820-198C CUTTER BLADE 1/2 x3x25 CCW (CTR Deck)
6
820-437C CUTTER BLADE 1/2 x3x19 CCW (LH Wing)
6
820-438C CUTTER BLADE 1/2 x3x19 CW (RH Wing)
CW
CCW
CCW