Double Knife Timed - MacDon D65 Operator's Manual

Tensioning Single and Double Knife Headers With Non-Timed Drive
This procedure applies to single knife headers and to double knife headers with non-timed drives.
IMPORTANT
To prolong belt and drive life, do not overtighten
belt.
1. Open endshield. See
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 ft·lbf (80 N·m) deflects belt (C)
3/4 in. (18 mm) at mid-span.
4. Check clearance between belt (A) and belt guide (B).
It should be 0.04 in. (1 mm).
5. Loosen three bolts (C) and adjust position of guide (B)
as required.
6. Tighten bolts (C).
7. Close endshield. See
8. Re-adjust tension of a new belt after a short run-in
period (about 5 hours).

Double Knife Timed

This section applies to 35 ft. and smaller double knife model D65 Draper Headers with timed drives.
169594
MAINTENANCE AND SERVICING
Opening Endshields, page
Closing Endshields, page
37.
Figure 6.50
38.
Figure 6.51
151
Rev. C