MacDon R85 Rotary Disc 13 Foot - Manual (Page 85)

MAINTENANCE AND SERVICING
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83
Revision C
7.5.3.1 Disc Removal/Installation
CAUTION
Exercise caution when working around the
blades. Blades are sharp, and can cause
serious injury. Wear gloves when handling
blades.
a. Place a block of wood between two discs to
prevent disc rotation while loosening blade bolts.
b. Replacing a disc:
1. Remove four bolts (A) on disc cover (B), and
remove cover and disc (C).
2. Position new disc (C) on spindle ensuring it is
90 degrees to the adjacent discs.
3. Install cover (B), and secure with four bolts
(A). Tighten bolts to 92 ft·lbf (125 N·m).
c. Replacing disc under driven deflector:
1. Remove four bolts (D).
2. Remove cover (E), deflector (F), and disc (G).
3. Position new disc (G) on spindle, ensuring it is
90 degrees to adjacent discs.
4. Position deflector (F) on spindle so that it
clears accelerators (H).
5. Install cover (E), and secure with four bolts
(D). Tighten bolts to 92 ft·lbf (125 N·m).
d. Replacing the driveline disc:
1. Remove the four bolts (J) that secure the
driveline (K) and disc (L) to the spindle.
2. Rotate the deflector (M) as required so that
large opening in deflector faces you.
3. Remove the driveline (K) through the larger
opening in the deflector.
4. Loosen the four bolts (N) in the two plates (O)
that hold the upper driveline shield (P) in
place.
5. Move the plates (N) so that shield (P) can be
lowered into deflector (M).
6. Remove the deflector (M) and upper driveline
shield (P).
7. Remove disc.
8. Position new disc (L) on spindle ensuring it is
90 degrees to the adjacent discs.
9. Locate deflector (M) and upper driveline
shield (P) onto spindle.
10. Raise upper driveline shield (P) into position,
and move plates (O) into slots in shield. Do
NOT tighten bolts.
(continued next page)
C
B
A
F
E
D
H
G
N
P
O
O
M
K
M
J
L