8knife speed, Table 4.6, Knife speed – MacDon FD75 OM User Manual
Page 164: 8 knife speed

4.7.8
Knife Speed
The header knife drive is driven by the adapter hydraulic pump which is driven by the combine feeder house. There
is no separate adjustment to control the knife speed.
IMPORTANT:
For variable speed feeder houses, the values
in the table are the MINIMUM feeder house
speeds.
Reduce the flow to the knife drive
motor if operating above these values to prevent
over-speeding the knife and knife failure.
Combine
Feeder House Speed
(rpm)
John Deere
490
CIH
575
Gleaner
624
Massey
624
Challenger
624
New Holland
575
Lexion
2
420
IMPORTANT:
Check that the knife speed is within the values in
the Table. Refer to
Table 4.6
Recommended Knife Drive
Speed Range (rpm)
Header Size
SKD
DKD
30 ft
600–700
—
35 ft
550–650
—
40 ft
525–600
550–700
45 ft
—
550–700
2.
420 is the rear shaft speed on Lexion combines (speed shown on cab monitor will also be 420). The output shaft speed is
actually 750 rpm.
169894
150
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