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214323
87
Revision B
3.7.7
Draper Speed
Correct draper speed is important for achieving a good flow of cut crop away from the cutterbar.
The side drapers and feed draper operate independently of each other, therefore, the speeds are controlled differently. The
side draper speed is adjusted with a manually adjustable control valve that is mounted on the adapter. The adapter feed
draper speed is fixed to the combine feeder house speed and cannot be independently adjusted.
Adjust the draper speed to achieve efficient crop feeding onto the adapter feed draper. Refer to
Adjusting Side Draper Speed
The side drapers carry the cut crop to the adapter feed draper which then feeds it into the combine. The speed is
adjustable to suit crops and crop conditions.
A
1006122
Figure 3.98: Side Drapers
Side drapers (A) are driven by hydraulic motors and a pump that
is powered by the combine feeder house drive through a
gearbox on the adapter. Side draper speed is set by using the
flow control valve on the adapter which regulates the flow to
the draper hydraulic motors.
1001264
A
Figure 3.99: Flow Control Valve
Flow control (A) valve has settings from 0
–
9 on the barrel that
line up with a notch on the hydraulic compartment cover to
indicate the draper speed. The flow control valve is factory-set
to 6 which should be sufficient for normal crop feeding.
To change the draper speed, shut down the combine and rotate
the flow control valve dial to adjust the control.
Refer to one of the following for recommended draper speed
settings:
•
3.6.2 Header Settings, page 43
•
3.6.3 Optimizing Header for Straight Combining Canola,
page 49
NOTE:
Insufficient draper speed may be caused by low relief pressure.
See your MacDon Dealer for checking and adjusting the CA25
hydraulic relief pressure.
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