WHEEL BEARINGS

TM-5-3710-200-13P Disk Harrow F41 Wheel Offset Tandem Manual
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WHEEL BEARINGS: The wheel hubs are equipped with tapered roller bearings. These hubs are packed with grease and adjusted at the factory. They should be repacked and the spindle nut properly adjusted each season or every 300 hours of operation. Use a good grade No. 2 gun grease (Lithium Base). Wheel bearings should be repacked with grease and adjusted annually. Under extreme conditions, they should be serviced more frequently. Check occasionally for excessive end play. Adjust as required to eliminate excessive end play. To disassemble the hub, remove the wheel, then remove the dust cap by prying around it. Remove the cotter pin, slotted nut, and flat washer. Carefully remove the hub and bearings from the spindle. Thoroughly clean and carefully inspect all parts for wear. All parts that appear to be worn or damaged must be replaced. Use the following procedure when repairing or servicing wheel hubs: 1. Clean all parts that are to be re-used. 2. Carefully inspect the metal case on the grease seal. Discard the seal if the case is bent or damaged. Check seal lips for cuts, tears, or excessive wear. Seal must fit snugly on extended inner race of bearing. 3. Carefully inspect both sets of bearing cones. Bearing bore and rollers must be smooth and free of nicks and scratches. Replace cones if damaged. 4. Inspect hub to make sure that the hub holes have a full thread. Bearing cones must be smooth and free of surface blemishes. Cups must be removed from the hub and replaced if damaged. Cups should be fully pressed into the hub and rest squarely against the shoulder inside the hub. Hub cap and grease seal should fit snugly inside the hub. Severely damaged hubs should be replaced. 5. Threads on spindle must be in good condition. Bearing cone seats must be smooth and free of blemishes. Bearing cones must fit squarely on the spindle. 6. Flat washer, slotted nut, cotter pin and hub cap must be in good condition. Replace if worn or damaged. To reassemble the hub, repack each bearing cone with grease and fill the hub cavity 1/3 full of grease. Place inner bearing assembly in hub, press grease seal into hub and carefully re-install the hub on the spindle. Install the outer bearing assembly into the hub and replace the flat washer and slotted nut. Tighten the slotted nut to seat the bearings, until the hub binds when rotated. Back the slotted nut to the nearest slot. Rotate the hub five or six revolutions in each direction to seat all parts. Re- tighten the slotted nut while rotating the hub. When the hub binds, back the nut off to the nearest slot, and install the cotter pin. Install the hub cap, and re-mount the wheel on the hub. 24

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