MacDon PW8 Pick-Up Header - Manual (Page 71)

OPERATION
If your combine is factory equipped with Auto Header
Height Control (AHHC), refer to the following for operating
and adjustment information.
1. The optimum pick-up height is 12 in. (305 mm) off the
ground under normal conditions, and the AHHC should
be set to the Neutral position.
2. Use the AHHC to change the pick-up operating height
to suit your specific crop condition. Refer to your
combine operator manual for details.
3. If the AHHC sensor requires adjustment, refer to the
PW8 Pick-Up Header Technical Manual MD #169841,
or your MacDon Dealer.
Pick-Up Height
Pick-up height (A) is the distance between the pick-up
finger and the ground.
The recommended pick-up height is 1 in. (25 mm), and
may need to be changed to suit field conditions.
Two general symptoms will indicate that an adjustment is
required:
• If the pick-up leaves material in the swath, the pick-up
height is too high.
• If the pick-up fingers are wearing quickly or are picking
up dirt and stones, the pick-up height is too low.
Figure 3.77: Pick-Up Height
Adjusting Pick-Up Height
Adjust the pick-up height as follows:
1. Check that tire pressure is 35–45 psi (240–310 kPa).
2. Adjust the operating height (A) so that the rear roller
is 12 in. (300 mm) off the ground.
Figure 3.78: Operating Height
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Revision A