MacDon PW7 Pick-Up Header - Manual (Page 41)

SECTION 5
OPERATING INSTRUCTIONS
Form 169149 Revision E 35
5.1 OPERATING SPEED
Performance of the pickup in various crop
and field conditions largely depends upon its
operating speed. If the swath is pushed
ahead, the pickup speed is too low and some
of the crop may remain unpicked. If the
swath is torn apart and is pulled toward the
combine header, the pickup speed is too high
and uneven combine feeding will occur.
Pickup operating speed is adjusted from the
combine cab by regulating oil flow to the
pickup hydraulic motor.
RAKE-UP: As a guide for initial settings of
pickup operating speed, a ratio of 11 RPM of
idler or drive rotor per 1 MPH of combine
ground speed can be used. For example:
when a combining speed of 5 MPH (8 km/h)
is selected, the rotors shall run at 11 x 5 = 55
RPM: at 3.5 MPH (5.6 km/h), the rotors shall
turn at 11 x 3.5 = 38.5 RPM.
If a shaft tachometer is available, set the rear
roller shaft speed at 73 RPM per 1 MPH of
combine speed. For example: when a
combining speed of 5 MPH (8km/h) is
selected the rear roller shaft shall run at 73 x
5 = 365 RPM.
SWATHMASTER: As a reference for
initial settings of pickup operating speed, a
ratio of 13 RPM of the front draper belt per 1
MPH of combine ground speed can be used.
For example: when a combining speed of 5
MPH (8km/h) is selected, the front draper
belt shall run at 13 x 5 = 65 RPM; at 3.5
MPH (5.6km/h) the draper belt shall run at
13 x 3.5 = 45.5 RPM.
If a shaft tachometer is available, set the rear
draper - rear roller shaft speed at 73 RPM per
1 MPH of combine speed. For example:
when a combining speed of 5 MPH (8km/h)
is selected the rear draper - rear roller shaft
shall run at 73 x 5 = 365 RPM.
In general, maximum pick up speed for picking
conditions shall be selected so that the swath is
always pushed slightly ahead.
IMPORTANT: The maximum front draper belt
speed on a SwathMaster pickup should not
exceed 104 RPM equivalent to a combine speed
of 8 MPH. The maximum idler or drive rotor
speed on a Rake-Up pickup should not exceed
88 RPM equivalent to a combine speed of 8
MPH. Over speeding the pick up may cause
premature wear of drive components and
minimize performance
ATTENTION : Do not over-speed pickup.
Over-speeding pickup will cause premature
wear of drive components and adversely
affect pickup performance.
HEADER: The header is supplied with an auger
drive sprocket to match your combine. In certain
crops, a higher or slower auger speed may be
desired. Contact your dealer for available
sprocket options.