MacDon CA20 Operators Manual - Manual (Page 66)

OPERATION
Form 169009 64 Model Year - 2009
7.3.7 HEADER DRAPER SPEED
Speed of the header or side drapers is adjusted
at the flow control on the combine adapter.
Turn knob four turns from closed to begin and
then adjust draper speed to achieve good
feeding of crop onto adapter draper. Excessive
draper speed will reduce draper life.
NOTE
If sufficient draper speed cannot be
achieved, a possible cause is low relief
pressure. Refer to Technical Service
Manual for checking and adjusting relief
pressure.
7.3.8 HEADER SICKLE SPEED
The header sickle drive is driven by the adapter
mounted hydraulic pump. The sickle drive
speed is factory set to match the nominal speed
of your combine feeder house.
IMPORTANT
For variable speed feeder houses, this
will be the minimum speed setting. If
desired to operate variable speed feeder
house at greater than minimum speed,
flow to the sickle drive motor must be
reduced to prevent excessive speeds
which could result in premature sickle
failure. If adjustment is required, contact
your MacDon dealer or refer to the CA20
Combine Adapter Technical Manual.
Refer to the D50 and D60 Harvest
Header/FD70 FlexDraper Operator’s Manual for
detailed procedures on sickle operation.
7.3.9 ADAPTER FEED DRAPER
The adapter feed draper is driven by the
adapter mounted hydraulic pump. The speed is
factory set and cannot be adjusted.
7.3.10 AUGER SPEED
The adapter auger is chain driven from a
sprocket that is mounted on the input shaft from
the combine, and which is enclosed in the drive
gearbox. The speed is determined by the
combine input shaft and is matched to each
particular combine, so no adjustment is
necessary. However, optional drive sprockets
are available to change the auger speed to
optimize auger performance.
7.3.11 AUGER PAN CLEARANCE
Adapters are factory set to the proper auger
clearances to the pan and feed draper. See
illustration.
It is important that these clearances are
maintained. Too little clearance may result in
the tines or flighting contacting and damaging
the draper or feed pan under certain
orientations of the header. Look for evidence of
contact when greasing the adapter.
Should adjustment to the auger be necessary,
proceed as follows:
a. Extend center link to maximum for steepest
header angle and fully lower the header.
(continued next page)
FEED DRAPER CLEARANCE
AT FLATEST HEADER ANGLE
1.0-1.5 in. (25-40 mm)
PAN CLEARANCE AT
STEEPEST HEADER ANGLE
0.2-0.4 in. (5-10 mm)