MacDon FD75 OM - Manual (Page 329)

MAINTENANCE AND SERVICING
4. Open the access cover (A) on the endsheet behind
cutterbar to provide clearance between the knife drive
box pulley and the endsheet.
Figure 6.120: Cover
5. Remove belt (A) from drive pulley (B).
6. Slip belt (A) over and behind the knife drive box
pulley (C). Utilize notch in pulley to assist in
removing belt.
Figure 6.121: Knife Drive
7. Manually stroke knife to its outer limit and clean area
around the knifehead.
8. Remove bolt (A).
9. Remove the grease zerk (B) from the pin.
10. Use a screwdriver or a chisel in slot (C) to release load
on knifehead pin.
11. Pry pin upward with a screwdriver in pin groove until
pin is clear of knifehead.
12. Push the knife assembly inboard until it is clear of the
output arm.
13. Seal bearing in knifehead with plastic or tape.
Figure 6.122: Knifehead
169894 315 Revision A