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214327
155
Revision B
5.6
Knife Drive
The knife drive system transforms pumped hydraulic pressure into a mechanical motion that stokes a series of serrated
knife blades at the front of the header back and forth to cut a variety of crops.
5.6.1
Knife Drive Box
Knife drive boxes convert rotational motion into the reciprocating motion of the knife, and are belt driven by a hydraulic
motor. There is one knife drive box on single-knife headers and two knife drive boxes on double-knife headers.
CAUTION
To avoid personal injury, before servicing machine or opening drive covers, refer to
Checking Mounting Bolts
Check the torque on the four knife drive box mounting bolts after the first 10 hours of operation and every 100 hours
thereafter.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine and
remove the key before leaving the operator
’
s seat, and always engage the safety props before going under the
machine for any reason.
1009517
A
B
Figure 5.56: Knife Drive Box
1.
Torque side bolts (A) first, then torque bottom bolts (B).
Torque all bolts to 271 Nm (200 lbf·ft).
Removing Knife Drive Box
The knife drive box may need to be removed for repair at the Dealership. Follow the recommended removal procedure
provided here.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine and
remove the key before leaving the operator
’
s seat, and always engage the safety props before going under the
machine for any reason.
Timed double-knife headers:
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