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 4.183: Knife Speed Adjuster Screw
Setting Knife Speed (without Expansion Module MD #B4666)
1. Check head
er knife drive box pulley speed with a
handheld
tachometer.
2. Multiply
the rpm reading by 2 to obtain the knife speed
in stroke
s per minute.
3. Compare r
eading to Table 4.1 D-Series Knife Speed ,
page 175.
4. If requi
red, adjust knife speed. Refer to Step 9., Setting
Knife Sp
eed (with Expansion Module MD #4666), page
176.
Figure 4.184: Knife Drive Box on Header
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Revision A