Great Plains YP1625A Operator Manual - Manual (Page 84)

80 YP1125A & YP1625A Table of Contents Index Great Plains Manufacturing, Inc.
401-625M Table of Contents Index 2013-08-13
Overall
Low
Population
(cont.) Seeds are not falling from disk, and get
carried past drop zone. Static electricity can
cause small, lightweight seeds to cling to the
pocket and not fall out. The graphite component of Ezee Glide Plus addresses
this issue. Increase the amount of Easy Glide Plus
and/or more thoroughly mix the lubricant into the seed.
Air pressure too low, false information
driving the DICKEY-john
®
software.
Compare the air pressure reported on the monitor
console to the mechanical gage. If they do not match:
• Inspect the
1 ⁄
4
inch 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
insufficient air for seed delivery Install blank disks and close shutters on unused rows.
Inadequate contact wheel spring pressure Check for correct spring and gap setting, page 50.
Air pressure in contact wheel incorrect Check for correct tire air pressure, page 127.
Excess field speed Plant within speed ranges recommended in seed rate
charts.
Improper gap on speed sensor. Check speed sensor on planter for
1 ⁄
16
inch to
1 ⁄
8
inch
(1.6 to 3.2 mm) gap from wheel. Improper gap can
cause erratic speed signal causing monitor to falsely
report improper planting rate.
Incorrect speed sensor constant Perform speed calibration per DICKEY-john
®
monitor
manual.
Low
Population,
One Wing Ground Drive only:
LH and RH Range setup not matched. Make sure LH and RH Range settings are identical,
and that sprockets are on proper DRIVING/DRIVEN
shafts.
Ground Drive only:
LH and RH Transmission setup not
matched. Make sure LH and RH Transmission settings are
identical, and that sprockets are on proper
DRIVING/DRIVEN shafts.
Clutch slipping, due to contaminants in
clutch, or wear Lock-up clutch (page 38) until it can be overhauled or
replaced
Skipping chain from drive to wing Check chain slack.
Replace worn chain.
Population Too Low
Problem Cause Solution