To replace a bearing, the snap ring must be removed. The old bearing and Protect-O-Shield should then be
pressed out of the housing. Clean and wash out old grease and carefully check the housing. Replace the
housing if it is damaged. Check the Protect-O-Shields and replace if they are damaged before installing. Press
the new bearing straight into the housing. Always press against the outer race of the bearing. NEVER press
against the seal or inner race of the bearing. Check location of the grease hole in the outer race of the bearing.
This hole must align with the grease groove in the bearing housing. Rotate the bearing in the housing after it is
pressed in to be sure it turns freely. Install the other Protect-O-Shield. Install the snap ring in the housing.
After cleaning, checking, and replacing all damaged parts, the gang should be assembled. Be sure the grease
fittings in the bearing housings face to the rear. Be sure the snap ring in the bearing housing is turned toward the
convex (back) side of the disk blades. The l-l/2'' square gang bolt nut should be torqued to 800-1000 ft/lbs. The
axle nut should be locked in place with the lock strap.
After the gang is assembled it should be attached to the harrow. The bearing risers should be carefully spaced to
match the bearing housings. Poorly spaced bearing risers will overload the bearings and cause premature
failure. The gang should be rotated 4 or 5 complete revolutions to be sure that all parts are aligned and the gang
The bearings should be greased each week or every 50 hours of use with a good grade of clean, number 2,
lithium soap base grease. Use of dirty grease or a grease with metallic additives will reduce bearing life. A hand
operated grease gun should always be used. Excessive greasing will damage bearing seals.
Check for proper
Adjust gang angle to angle best suited for soil
Disk not cutting
High-speed disking sometimes results in excessive
lateral movement of the soil. This may leave an
uneven surface behind the disk harrow known as
Front to rear
''ridging" or "furrowing." In extremely hard
ground, it may be necessary to shorten the stabilizer
Spring stabilizer to force the front gang into the ground.
In normal adjustment conditions, the stabilizer should be
adjusted so that the disk harrow is level front to rear
Improper scraper adjustment
Dirt sticking to
blades and spools
Ground too wet. Excess moisture in certain soils
make it very difficult to keep from plugging. Give
ground time to dry out.
NOTE: Read operating instructions and safety suggestions before using this equipment.