Chapter 9 - Service
909793/BP0805 28 Printed in U.S.A.
Disc Removal & Replacement
(Figs. 19, 20 & 21)
NOTE: Place a block of wood between the discs
so the discs will NOT rotate when removing the
mounting hardware.
Left Disc
1. Remove four self-locking cap screws (Fig. 21,
Ref. 1) to remove the flat cover (Ref. 2).
2. Remove four each cap screws (Ref. 3) and conical
spring washers (Ref. 4).
3. Remove the left disc assembly (Ref. 5); if the disc
is tight, pry up with two levers at opposite sides of
the disc.
4. The spacer (Ref. 6) is only used if the clearance
between the knife mounting bolt head and the cut-
terbar guard is less than 1/32” (1 mm). Refer to
Fig. 19 for measurement details.
5. Position the new disc and spacer, if required, on
the cutterbar hub. BE SURE the disc is rotated 90°
from the adjacent disc and that each knife is posi-
tioned with the small arrow pointing in the direc-
tion of disc rotation. Secure the disc with four each
cap screws and conical spring washers. Tighten
the cap screws to 90 ft.-lbs. (120 Nm) torque.
IMPORTANT: BE SURE the conical spring
washers are positioned with the crown up as
shown in Fig. 20.
6. Install the flat cover (Ref. 2) using four self-lock-
ing cap screws (Ref. 1). Tighten the cap screws to
65 ft.-lbs. (85 Nm) torque.
1 - 1/32 in. (1 mm) Minimum Clearance
Fig. 19
1
1 - Conical Spring Washer
Fig. 20
1
Right Disc
1. Remove four self-locking cap screws (Fig. 21,
Ref. 1) to remove the curved cover (Ref. 9).
2. Remove four each cap screws (Ref. 3) and conical
spring washers (Ref. 4).
3. Remove the right disc assembly (Ref. 10). If the
disc is tight, pry up with two levers at opposite
sides of the disc.
4. The spacer (Ref. 6) is only used if the clearance
between the knife mounting bolt head and the cut-
terbar guard is less than 1/32” (1 mm). Refer to
Fig. 19 for measurement details.
5. Position the new disc and spacer, if required, on
the cutterbar hub. BE SURE the disc is rotated 90°
from the adjacent disc and that each knife is posi-
tioned with the small arrow pointing in the direc-
tion of disc rotation. Secure the disc with four each
cap screws and conical spring washers. Tighten
the cap screws to 90 ft.-lbs. (120 Nm) torque.
IMPORTANT: BE SURE the conical spring
washers are positioned with the crown up as
shown in Fig. 20.
6. Install the curved cover (Ref. 9) using four self-
locking cap screws (Ref. 1). Tighten the cap
screws to 65 ft.-lbs. (85 Nm) torque
Flat (Intermediate) Discs
1. Remove two cap screws (Fig. 21, Ref. 3) and coni-
cal spring washers (Ref. 4) to remove the conical
cover (Ref. 7).
2. Remove the remaining two cap screws (Ref. 3)
and conical spring washers (Ref. 4) to remove the
disc (Ref. 8). If the disc is tight, pry up with two
levers at opposite sides of the disc.
3. The spacer (Ref. 6) is only used if the clearance
between the knife mounting bolt head and the cut-
terbar guard is less than 1/32” (1 mm). Refer to
Fig. 19 for measurement details.
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