MacDon FD75 OM - Manual (Page 333)

MAINTENANCE AND SERVICING
NOTE:
For ease of removing or installing knifehead pin,
remove grease zerk from pin.
8. Install knifehead pin (A) through the output arm and
into the knifehead.
9. Align groove (B) in knifehead pin 0.06 in. (1.5 mm)
above (C). Install 5/8 in. X 3 in. hex head bolt and
nut (D) and torque to 160 ft·lbf (217 N·m).
Figure 6.130: Knifehead
10. Install grease zerk (A) into the knifehead pin, turn the
grease zerk for easy access.
IMPORTANT:
Grease knifehead just enough to start a
slight
downward movement of knifehead.
Over-greasing will misalign knife, causing guards
to overheat and overload the drive system.
Figure 6.131: Knifehead
11. Check the knife drive box pulley and drive pulley
alignment. If adjustment is required, contact your
MacDon Dealer.
12. Tighten knife drive box side bolts (A) first, then the
bottom bolts (B). Torque to 200 ft·lbf (271 N·m).
13. Stroke the output arm to mid stroke, check and ensure
that the knife bar does not contact the front of the first
guard. If adjustment is required, contact your MacDon
Dealer.
14. Install and tension the knife drive belt(s). Refer to
Tensioning Knife Drive Belts, page 313 .
15. Close endshield. Refer to Closing Endshields, page
36 .
Figure 6.132: Knife Drive Box
169894 319 Revision A