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Great Plains YP3025A Operator Manual User Manual

Page 90

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86

YP3025A

Table of Contents

Index

Great Plains Manufacturing, Inc.

401-705M

Table of Contents

Index

02/16/2012

Overall
Low
Population
(cont.)

Air pressure too low, false information driv-
ing the DICKEY-john® software.

Compare the air pressure reported on the monitor con-
sole to the mechanical gage. If they do not match:
• Inspect the

1

4

in sample lines from the row units up

to the sensor chamber for leaks.

• Make sure all non-planting rows have blank disks.

• Re-zero the air pressure with the fan off.

Low fan speed: meter starvation due to
meter pressurization, leaving insufficient air
for seed delivery

Increase fan speed.

Leaking meters in split row: meter starvation
due to meter pressurization leaving insuffi-
cient air for seed delivery

Install blank disks and close shutters on unused rows.

Excess field speed

Plant within speed ranges recommended in seed rate
charts.

Incorrect speed sensor constant.

Perform speed radar calibration per DICKEY-john®
monitor manual. See page 167.

Speed sensor angle.

With planter lowered, check radar speed sensor angle
per DICKEY-john® recommendations.

Pass gaps too large

Check marker extension (page 166).
For GPS, check planter size programmed.

Actual field size is different

Population may be correct, and calculations are not.

Low
Population,
One
Section

Clutch slipping, due to contaminants in
clutch, or wear

Lock-up clutch (page 48) until it can be overhauled or
replaced

Skipping chain from drive to section

Check chain slack.
Replace worn chain.

Low
Population,
Single Row

Shutter opening too wide - interfering with
meter pressurization

Adjust shutter to lower setting.

Shutter opening too narrow - starving meter
of seed (low seed pool)

Adjust shutter to higher setting.

Y-tube partially or completely closed, reduc-
ing bulk flow to meter or causing bridging

Open Y-tube for row

Meter starvation due to bridging at shutter

Re-adjust for shutter bridging (page 75).
If seed is treated, increase seed lubricant.

Meter starvation due to bridging above inlet,
caused by low seed delivery air flow

Clear bridge (page 75). Check that seed delivery sys-
tem is getting sufficient fan air, and that there are no
other obstructions upstream.

Meter starvation due to bridging above inlet,
caused by high levels of seed treatment

Clear bridge (page 75). Increase seed lubricant.

Population Too Low

Problem

Cause

Solution