Great Plains DVN8552 Operator Manual - Manual (Page 27)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 23
2014-02-12 550-353M
Machine
Plugging Coulter/disc gangs running deeper than
sweeps.
Machine not level front to back.
Too much residue in the rows.
Disc gangs not cutting residue.
Improperly spaced shanks.
Running too low.
Ground too wet.
Raise coulter/disc gangs.
Level machine front to rear with turnbuckle, See “Front
to Rear Leveling” on page 14.
Run at a slight angle to the rows.
Check for sharpness.
Check shank layout for proper shank placement.
Speed up (6-7 m/h)/(9-11 km/h).
Allow ground to dry some.
Machine
Bouncing Operating speed too fast. Slow down (6-7 m/h)/(9-11 km/h).
Uneven
Working
Depth Lift cylinders out of phase.
Timed detent not set correctly.
Timed detent not allowing depth stop to
engage.
Rephase (See Operators Manual).
Set flow for 0.5 after machine is raised.
Adjust detent timer to allow for depth stop to engage.
Overheatin
g Hydraulic
System Flow set to continuous. Disengage continuous flow.
Coulter/Disc Gang Performance
Problem Cause Solution
Coulter/
Disc Blades
Do Not Pen-
etrate Blades too dull.
Improper spring preload. Sharpen blades (if applicable).
Raise disc gangs.
Reset spring preload, See “Disc Gang Depth Calibra-
tion” on page 15.
Coulter/
Disc Gangs
Are
Plugging Scrapers are not set properly.
Gangs are running too shallow.
Ground too wet.
Set scraper according to specs, See “Scraper Set-
tings” on page 18.
Increase gang depth or raise completely.
Fix leaking gang cylinder, See pages 30-31 of “Parts
Manual”.
Allow ground to dry some.
Entire
Coulter/
Disc Gang
Depth
Changes Gang circuit leak in tractor Completely extend/re phase cylinders periodically.
Wing
Coulter/
Disc Gangs
Coming Out
Of Ground Leaking slave cylinder on same side as
wing. Repair or replace leaky cylinder, See pages 30-31 of
“Parts Manual”.
General Performance
Problem Cause Solution