MacDon D65 SP DHOM - Manual (Page 175)

MAINTENANCE AND SERVICING
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. Refer to Tensioning
Non-Timed Knife Drive Belts, page 163 .
Figure 6.72: Knife Drive
3. Reinstall the access cover (A) and secure it with bolt.
4. Close endshield. Refer to Closing Endshields, page
38 .
Figure 6.73: Access Cover
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 Opening Endshields,
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.
Figure 6.74: Left-Hand Shown – Right-Hand
Opposite for Double-Knife Headers
169899 163 Revision A