UNIT SIDE DRAFTS OR MOVES SIDE TO SIDE
Lift wheels not carrying enough weight:
adjust
depth stop and raise implement.
Unit not level front to rear:
adjust unit to be level.
Level unit side to side:
level center frame and wing
frame to center frame side to side.
Gauge wheels too high, allowing wings to go to
deep:
properly reset gauge wheels.
FRAMES BUCKLING, NOT EVEN
Lift wheels not carrying enough weight:
adjust
depth stop and raise implement
Wing frames and center frame not level to each
other
: level wing frames to center frame
Gauge wheels not set correctly or uneven:
set
gauge wheels properly.
WHEEL BEARING FAILURE
Triple-lip seals not installed correctly:
install seals
with the lips pointing outward away from the hub.
HYDRAULIC - LIFT CYLINDERS NOT FULLY
EXTENDING
Lift cylinders not in phase:
fully extend cylinders
and hold hydraulic lever until all cylinders are fully
extended.
Cylinders not installed in proper series:
Wing
cylinders are smaller diameter than center cylinders.
Reinstall cylinders properly.
Hoses not properly connected:
check hose routing
HYDRAULIC - ENTIRE UNIT SETTLING
Depth stop valve not working:
repair valve
HYDRAULIC - UNIT SETTLING, ONE WING
RAISING
Center frame cylinder leaking internally on side
of unit that wing is raising:
repair center master
cylinder
HYDRAULIC - WING SETTLING
Wing cylinder leaking:
repair cylinder
DISC GANG PLUGGING
Scrapers set too far from disc blade:
adjust
scrapers to meet disc blade closer and evenly.
Operating depth too deep:
raise unit.
Conditions too wet:
wait until conditions more
favorable.
In drier conditions, set scraper farther away from
disc blade to improve residue flow
DISC GANG WILL NOT TURN OR
PUSHES SOIL
Scrapers set too tight:
readjust scrapers.
Depth set too deep for loose or wet conditions:
raise implement or wait until conditions are more
favorable.
Gang bearing failure:
replace bearing
5-2
Summary of Contents for 7430 Series
Page 3: ...MODEL 7430 VERTICAL HARROW OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i...
Page 4: ...NOTES ii...
Page 8: ...NOTES 1 2...
Page 16: ......
Page 44: ...NOTES 3 28...
Page 65: ...NOTES 4 21...
Page 66: ......
Page 70: ...NOTES 5 4...