Great Plains 3N-4020 Operator Manual - Manual (Page 96)

92 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
Point Row Troubleshooting
Hydraulic Drive Troubleshooting
Drive will not rotate:
(see Troubleshooting Flow Chart and Electronics Over-
view, page 96 and page 97)
1. Check cab console:
a. No power to cab console - check with voltmeter.
b. Upper line (set) is visible but no lower line (out
rate and speed) on display: move to Communi-
cation troubleshooting below.
Press wheel or openers
plugging Planting conditions too wet. Wait until drier weather.
Coulters set too deep, bring up excess
dirt and moisture. Check coulter adjustment.
Drill not set to run level from front to rear,
carrying enough weight on wheels to pre-
vent “nosing over”, or set too low on rear
caster eyebolts allowing it to run “nose
high”. Check Leveling Frame Front-to-Rear,
page 102.
Backed up with drill in the ground. Clean out and check for damage.
Failed disk bearings. Replace disk bearings.
Disk blades worn. Replace disk blades.
Scraper worn or damaged. Replace scraper.
Seed cup sprockets locked
up or seed drive shaft
twisted Foreign matter lodged in seed cup
sprockets. Clean out seed cup sprockets.
Build-up of dried liquid insecticide in seed
cups. Remove build-up by disassembling each
seed cup and scraping the foreign sub-
stance from turning surfaces.
Problem Cause Solution
no seed
metering, all
rows fuse blown Check fuse. Correct
underlying fault before
replacing fuse.
height switch
not tripping Check adjustment of
height switch.
no metering,
one section clutch failure Lock-up clutch until
repaired or replaced.
shearing Replace 1 ⁄
4
-20 bolts and
1 ⁄
4
in roll pins in clutch
assembly.
seed rate low
or uneven lubricant in
clutch Disassemble and
degrease clutches.
meters
always on CAL mode
on Move Master switch han-
dle from CAL to ON.
height switch
always on Check adjustment of
height switch.
Problem Cause Solution