MacDon M105 - Setting Knife Speed (Without Expansion Module MD #B4666)

OPERATION
12. Loosen jam nut (A).
13. Turn adjuster screw (B) clockwise (screw in) to
decrease knife speed, and counterclockwise (screw
out) to increase the knife speed.
NOTE:
One turn of the adjuster screw (B) will change the knife
speed by approximately 116 strokes per minute (spm),
or the knife drive box pulley speed by 58 revolutions per
minute (rpm).
14. Once adjust
ment has been made, torque jam nut (A).
15. Close hood,
start engine, and recheck knife speed.
Figure 4.192: Knife Speed Adjuster Screw
Setting Knife Sp eed (Without Expansion Module M D #B4666)
1. Check header knife drive box pulley speed with a
handheld tachometer.
2. Multiply the rpm reading by 2 to obtain the k n ife sp eed
in strokes per minute .
3. Compare reading to Table 4.2 A-Series Knife Speed,
page 182.
4. If required, adjust knife speed. Refer to step 9., Setting
Knife Speed (With Expansion Module MD #4666
Installed), page 183.
Figure 4.193: Knife Drive Box on Header
169890 184 Revision A