214683 94 Revision A
3.7.9 Knife Speed Data
The header knife drive is powered by the FM100 hydraulic pump, which is driven by the combine feeder house.
There is no separate adjustment to control the knife speed.
Table 3.15 Feeder House Speed
Combine
Feeder House Speed
(rpm)
John Deere
490
Case IH
580
Gleaner 625
Massey Ferguson
625
Challenger
625
New Holland
580
CLAAS
44
420
IMPORTANT:
For variable speed feeder houses, the rpm values shown at
right represent the MINIMUM feeder house speeds.
Table 3.16 FD1 Series Header Knife Speed
Header Size
m (ft.)
Recommended Knife Drive
Speed Range (rpm)
Single-Knife
Drive
Double-Knife
Drive
9.1 m (30 ft.)
600–700
—
12.1 m (35 ft.)
550–650
—
12.2 m (40 ft.)
525–600 550–700
13.7 m (45 ft.)
—
550–700
IMPORTANT:
Ensure the knife speed is within the range of rpm values in
Table 3.16, page 94. Refer to Checking Knife Speed, page
95.
IMPORTANT:
Under normal cutting conditions, knife speed taken at the
knife drive pulley should be set between 600–640 rpm
(1200–1280 spm). If set to low side of chart, you could
experience knife stalling.
OPERATION
44. The rear shaft speed on CLAAS combines is 420 rpm (speed shown on cab display monitor also will be 420).
The output shaft speed is actually 750 rpm.
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