MacDon PW7 Pick-Up Header - Manual (Page 35)

SECTION 4 - ADJUSTMENTS
Form 169149 Revision E 29
4.6 PICKUP DRIVE BELT TENSION
Both Rake-Up and SwathMaster models come
equipped with self-tightening v-belts.
SwathMaster units have an additional method
to increase tension if required.
SwathMaster adjustment is as follows:
1. Remove drive shields. (See Service-Section
7)
2. Eliminate v-belt tension. (See Service-
Section 7)
3. Remove tension spring and reposition so
the extension is outside the mount bracket.
4. Tighten the tension spring hardware and
put v-belt back on sheaves.
4.7 SPEED CONTROL & HEIGHT
CONTROL
Depending of availability of these features on
various combine makes, the units may be
factory equipped with the speed control and
height control features. Refer to the following
for information to adjust and operate these
features.
Speed Control
In order for the speed control to operate properly
the sensor must be adjusted to read the target or
sprocket teeth.
The sensor height can be adjusted up or down by
loosening the 3/4” jam nuts with a wrench.
Adjust to a horizontal clearance of 3/16”(5mm).
Loosen the target sensor and slide it on the roller
shaft until the desired clearance is achieved
between the sensor and a sprocket tooth. When
proper alignment is achieved, tighten the lower
nut to lock the sensor into place and tighten the
setscrew to maintain target adjustment. Refer to
Section 5.1 for optimum pick up speeds and your
combine operator’s manual for the combine
portion of Dial-a-Speed operation.
ATTENTION : Loosen the lower nut first
when removing or adjusting the sensor.
Sensor Details
(Target May Not Be As Shown)
Height Control
NOTE: Never make any adjustments to the
AHC while the AHC unit is active in the
combine. Adjusting the AHC unit will cause
the feeder house to raise and lower.
Under normal conditions, the optimum pick up
height is achieved when the rear draper roller is
14” off of the ground. For normal conditions, set
the AHC so that it is in the neutral position when
Factory
Setting
Extension Spring
Position for
Increased Tension
P00687
D00126