Land Pride RC5020 User Manual
Page 35
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Section 5: Maintenance & Lubrication
5/29/13
RC5020 (540 RPM) and RCM5020 (1000 RPM) Rotary Cutters 318-474M
Refer to Figure 5-2:
3.
Remove wing nuts (#11), lock washers (#10), flat
washer (#9)and access cover (#6). Rotate blade
bolt (#1) until in alignment with access hole (A).
4.
Unscrew locknut (#5) to remove cutting blade (#2).
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" 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.
Blade Rotation (Rear of Cutter Shown)
Figure 5-1
Refer to Figure 5-1:
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. Airfoil (lift) must be
oriented towards the top of deck.
CW
CCW
CCW
Refer to Figure 5-2:
Cutter Blade Assembly
Figure 5-2
7.
Insert blade bolt (#1) through blade (#2),
dishpan (#3), and flat washer (#4). Secure blade with
a new locknut (#5) and torque to 450 ft-lbs.
8.
If replacing blade carrier (#12), 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 access cover (#6) with flat washers (#9),
lock washers (#10), and wing nuts (#11).
10. Reconnect main driveline to tractor PTO shaft.
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.
26675
Use 1-11/16"
Socket Wrench
On Blade Nut #5
Land Pride Cutter Blade Parts
Item Part No.
Part Description
318-586A
BLADE BOLT KIT (Item No’s 1, 4, & 5)
)
1
802-277C
BLADE BOLT 1 1/8-12 x 3 7/16 WITH KEY
2
820-168C
CUTTER BLADE 1/2 x 4 x 29 CCW
2
820-249C
CUTTER BLADE 1/2 x 4 x 29 CW
3
330-482D
DISHPAN
4
804-147C
WASHER FLAT 1 HARD ASTMF436
5
803-170C
NUT HEX TOP LOCK 1 1/8-12 PLATE
6
312-812D
ACCESS COVER PLATE