MacDon M Series Unloading And Assembly Instructions page 368

For windrowers NOT equipped with the optional
sensors expansion module (MD #B4666):
6. Check the knife drive box pulley (A) speed with a
hand-held tachometer.
7. Multiply the rpm reading by two to obtain the knife
speed in strokes per minute (SPM).
8. Compare the reading to Table
page 352.
9. Adjust the knife speed if required. Refer to Step
page 353 to Step 5., page
147962
PERFORMING PREDELIVERY CHECKS
5.5 Knife Speed Setting,
353.
1.,
Figure 5.51: Knife Drive Box Pulley
354
Revision A