Maintenance of the F41
KEEP ALL BOLTS TIGHT.
Check before placing in service.
Visually inspect all bolts daily.
Check after first 50 hours or one week's operation.
Check each season.
KEEP WHEEL BEARINGS PROPERLY ADJUSTED.
Clean and repack each season or every 300 hours.
Replace worn or damaged parts.
In disassembling and reassembling the wheel hub assemblies, care must be taken to not damage the grease seal
lips. In reassembly, to seat the bearings, carefully tighten the hex nut until the hub drags. Rotate hub to help
seat the bearing cups and cones. Re-tighten the hex nut until the hub drags, then back off the hex nut to the
nearest slot and secure with cotter pin.
DO NOT RUN WITH LOOSE DISK BLADES.
Keep gang bolts tight! Tighten gang bolts to 800-1000 ft. lbs. of torque.
KEEP SCRAPERS PROPERLY ADJUSTED.
GREASE BEARINGS AND RETAINER PINS REGULARLY.
Grease gang bearings and rockshaft retainer pins every week or 50 hours, at the start of each
season, and at the end of each season. Apply with low pressure, low volume hand grease gun.
Use a good No. 2 gun grease (Lithium Base). Rotate gangs while greasing for best results.
CAUTION: Use care to prevent damage to seals.
DISK BLADE, BEARING, AND SPOOL REPLACEMENT.
Remove the nuts that hold the gang bearing housing trunnion clamps.
Raise the harrow and roll the gang away from the frame.
Remove the gang nut lock plate.
Remove the gang hex nut from the end of the shaft.
Slide off the bearings, spools, spacers, and blades.
Avoid thread damage.
Tear the entire gang down and clean all parts. Check disk axle for straightness. Bowed, bent, or worn axles
must be replaced.
Check spacer spools for damage caused by running disk with loose gangs or hitting underground obstructions.
Replace spool if it is damaged.
Carefully check all end bells. The large end must contact the disk blade around the entire circumference of the
end bell. The small end must be smooth and perpendicular to the axle. The end bells must be replaced if they
are cracked or worn on the surface adjacent to the bearing.
Check all the bearings on the gang. Running a harrow for one hour or more after a bearing failure will seriously
damage other bearings on the gang. This damaged bearing will then fail within a few hours after the failed
bearing has been replaced. Continued operation with this failed bearing will damage the new bearing thus it will
fail after a few hours use. In most cases it will be best to replace all bearings on a gang when it is torn down for
repairs. A triple lip sealed bearing should always be used for bearing replacement. Also, a regreasable type
bearing should always be used.