Troubleshooting - Yetter 3400 Series Operator's Manual

Problem
Premature bearing failure
Rotary hoe arm bending or breaking
3500 Series Wings float up
Hydraulic cylinders fail to operate
properly (3500 model only)
Rotary hoe wheels plug with trash
materials
Hoe wheels won't penetrate
Rotary hoe wheels are too aggressive
TROUBLE SHOOTING
Cause
Excessive strain on the hoe wheel
bearings
Excessive strain on the arms and
wheels
Air in system
Gauge wheels not properly adjusted
Wing deflection not properly adjusted
Hinge levers not properly installed
Hydraulic system improperly installed
Air in system
Blocked restrictors
Excessive trash conditions
Hard soil conditions
Rotary hoe wheels running too fast
Rotary hoe wheels running too deep
Solution
Don't turn with rotary hoe wheels on
the ground
Store the rotary hoe inside to help
protect the bearings from freezing
weather, moisture, blowing sand, and
dirt
Keep all wheel bolts tight. Check
rotary hoe wheels for loose rivets and
bent teeth. Check for bent arm
castings
Don't turn with the rotary hoe wheels
on the ground
Don't back the rotary hoe with wheels
on the ground
Check for air in hydraulic system and
purge system
Check proper adjustment of wing
gauge wheels
Maintain center tool bar height above
or parallel with outer wings
Check assembly of hinge levers
Install 3500-107 Wing Lock Kit
Check for correct assembly of the
hydraulic system
Check for air in the hydraulic system
and purge system
Check restrictors for malfunctions
Decrease operating depth of hoe
wheels and increase ground speed to
create momentum so the hoe wheels
may clean themselves
On softer, mellow soils, decrease
operating depth so that hoe wheels
do not pickup trash material
Install optional Min-Till Conversion
Kit, (3412-3434-125)(3541or3546-
125)
Install optional trash guard (part no.
3400-147)
Lower tool bar to maximize
aggressiveness of rotary hoe
Lengthen center link on tractor to tilt
tool bar back to increase spring
tension
Install optional helper spring (part no.
3400-150)
Slow tractor ground speed
Decrease operating depth of rotary
hoe wheels
Install toolbar gauge wheels except
on model 3412 and 3415
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