MAC215986
336
Revision A
1036628
A
Figure 4.122: Knifehead
10. Reinstall grease fitting (A), and slowly apply grease. Apply
grease until the knifehead has a
SLIGHT
downward
movement, then stop.
IMPORTANT:
Do
NOT
overgrease the knifehead. Overgreasing leads to
knife misalignment causing excessive heating of guards and
overloading of drive systems. If overgreasing occurs,
remove the grease fitting to release pressure.
NOTE:
If air is trapped in the bearing cavity, the knifehead will
begin to move down before it has filled with grease.
1028389
A
B
Figure 4.123: First Knife Guard
–
View from
below Knife
11. Move the knife drive arm to the mid-stroke position, and
ensure the knife back bar doesn
’
t contact the front of first
guard (A).
12. If the knife back bar contacts the front of the first guard,
remove bolts (B), reposition the guard forward, and
reinstall the bolts. Torque bolts to 85 Nm (63 lbf·ft). If the
necessary clearance (zero contact between back bar and
front of first guard) is not achievable, then additional shims
are required between the knife drive box and the mounting
plate. Contact your MacDon Dealer.
13. Close the endshield. For instructions, refer to
4.8.6
Spare Knives
1034002
A
B
C
Figure 4.124: Spare Knives
Two spare knives (A) can be stored in the header backtube at
the right end. Ensure the spare knives are secured in place with
latch (B) and hairpin (C).
