Use rug upholstery shampoo on non-washable areas and dry thoroughly. Replace fuses one at a time to check individual circuits. If a fuse blows, look for the short. If an accessory fails to operate, check for broken wires or loose connections. Have brakes and steering mechanisms checked before you drive the vehicle.
Fresh lubricant is cheaper than paying for additional repairs.
For other farm implements, clean all exposed gears with kerosene or solvent, then coat with a light oil. Clean all chains by soaking or dipping them repeatedly in a bath of kerosene or solvent, then soak for several hours in a bath of light oil. Drain off excess oil upon completion. Enclosed gear cases should be inspected for water and grit. Drain water and grit from cases, flush with kerosene, refill with clean oil, and grease all bearings that do not have protective seals.