MacDon FD75 OM - Manual (Page 307)

MAINTENANCE AND SERVICING
4. Loosen bolt (A) securing idler sprocket (B).
5. Rotate auger in reverse to take up slack in lower strand
of chain (C).
Figure 6.75: Auger Drive
6. Push idler sprocket (A) down to eliminate remaining
slack in upper strands (B).
7. Rotate auger back and forth to check slack, and repeat
above step if necessary. A slight amount of slack is
acceptable.
NOTE:
Do not use excessive force on idler sprocket (A)
to tighten chain (B).
8. Torque idler bolt (C) to 121–134 ft·lbf (163–181 N·m).
Figure 6.76: Auger Drive
169894 293 Revision A