MAC215990
340
Revision A
4.9
Knife Drive System
The knife drive system transforms pumped hydraulic pressure into a mechanical motion that strokes a series of serrated
knife blades at the front of the header back and forth to cut a variety of crops.
4.9.1
Knife Drive Box
The knife drive box is driven by a hydraulic motor and converts rotational motion into the reciprocating motion of
the knife.
1028072
A
B
Figure 4.170: Left Knife Drive Box Shown
–
Right Similar
Single-knife headers have a knife drive box (A) and motor (B) on
the left side of the header; double-knife headers have a knife
drive box and motor at each end.
Checking Oil Level in Knife Drive Box
There must be a sufficient level of oil in each knife drive box for the knife drive to work correctly. The knife drive
’
s oil level
can be inspected using the dipstick installed in each knife drive.
DANGER
To prevent bodily injury or death from the unexpected start-up of the machine, always stop the engine and remove the
key from the ignition before making adjustments to the machine.
1.
Lower the header fully.
2.
Adjust the header angle so that the top of the knife drive box is level with the ground.
3.
Shut down the engine, and remove the key from the ignition.
4.
Open the endshield. For instructions, refer to
Opening Header Endshields, page 39
5.
Ensure that the header is level.
