MacDon D65 Operator's Manual page 175

1. Route knife drive belt (A) around knife drive box
pulley (C) and knife drive pulley (B). Use notch in
pulley (C) to assist in installing belt.
NOTE:
When installing new belt, never pry belt over pulley. Be
sure drive motor is fully forward.
2. Tension knife drive belt.
Non-Timed Knife Drive Belts, page
3. Reinstall the access cover (A) and secure it with bolt.
4. Close endshield. Refer to
38.
Tensioning Non-Timed Knife Drive Belts
This procedure applies to single- and double-knife headers with non-timed drives.
IMPORTANT:
To prolong belt and drive life, do NOT overtighten belt.
1. Open left endshield. Refer to
page 37.
2. Loosen the two bolts (A) that secure the motor
assembly to header endsheet.
3. Turn adjuster bolt (B) clockwise to move the drive
motor until a force of 20 lbf (80 N) deflects belt (C)
3/4 in. (18 mm) at mid-span.
169899
MAINTENANCE AND SERVICING
Refer to Tensioning
163.
Closing Endshields, page
Opening Endshields,
163
Figure 6.72: Knife Drive
Figure 6.73: Access Cover
Figure 6.74: Left-Hand Shown – Right-Hand
Opposite for Double-Knife Headers
Revision A