MacDon FD75 OM - Manual (Page 330)

MAINTENANCE AND SERVICING
14. Remove bolt (A) that clamps the knife drive arm to the
knife drive box output shaft.
15. Remove the knife drive arm (B) from the knife drive box
output shaft.
16. Remove the four knife drive box mounting bolts (C)
and (D).
NOTE:
Do NOT remove bolt (E), this is factory set. It is
used to position the knife drive box in the proper
fore-aft position.
17. Remove knife drive box with pulley and place on a
bench for disassembly.
CAUTION
Knife drive box with pulley weighs over 65 lbs (35 kg).
Use care when removing or installing. Lug (L) can be
used for lifting. If speed sensor is installed at this
location, you will need to remove it before using it
for lifting.
18. For double knife headers, repeat procedure for
opposite end. Figure 6.123: Knife Drive Box
Removing Knife Drive Box Pulley
To remove knife drive box pulley, follow these steps:
1. Loosen and remove the knife drive box pulley clamping
bolt (A) and nut (B) and remove knife drive box
pulley (C).
2. Remove pulley using a three-jaw puller.
Figure 6.124: Knife Drive Box and Pulley
169894 316 Revision A