Great Plains 3PYP Operator Manual - Manual (Page 54)

50 3PYP Table of Contents Index Great Plains Manufacturing, Inc.
401-312M Table of Contents Index 2014-09-09
Transmission Adjustments
For singulating and finger pickup meters, rate
adjustments should never be necessary. If the seed
spacing is not correct, it is likely that there is a planter
configuration error or malfunction. Find and correct the
problem. Do not attempt to compensate for it by
adjusting the target population rate.
For volumetric seeds, after checking initial planting rate,
per the Seed Rate manual, it may be necessary to make
changes to the transmission sprocket configuration.
If the error is small, a few percent, choose a slightly
higher or lower target population from the Seed Rate
chart, and install new sprockets for that rate.
If the error is large, it is likely that there is a planter
configuration error or malfunction. Find and correct the
problem. Do not attempt to compensate for it by
adjusting the target population rate.
Gauge Wheel Adjustments
The gauge wheels, which may also be contact drive
wheels, serve three functions:
1. Regardless of meter drive type, the gauge wheels
each establish the heights of their respective wings.
A spring-loaded yoke assembly provides some
flexibility over rocks and uneven ground. See
“Gauge Wheel Tension” on page 51 to set this
spring.
2. In ground-drive (contact-drive), the gauge wheels
mutually contribute drive power for the row unit
mechanisms. See “Gauge Wheel Sprocket
Selection” on page 47.
3. In ground-drive, the gauge wheels control the
planting rate at the meters, via three sprocket setup
positions. See “Gauge Wheel Sprocket Selection”
on page 47.
Figure 50
Gauge Wheel - Ground Drive
25257
Figure 51
Gauge Wheel - Hydraulic Drive
25434