When assessing a damaged baler belt, it is best to identify the exact source of the problem; usually the issue is excessive wear, a connection failure or damage from a foreign object. Another good reason to determine the exact cause of the problem is that it can help the owner determine if the baler belt needs to be repaired or replaced.
Look first for any signs of trauma on a broken baler belt. If there is no obvious reason for the break, the issue is likely just excessive overall wear. While some splice in a new section of belt at the break point, it's likely that another part of the belt will break soon enough and the problem will have to be dealt with once more. If the baler belt's edges are fraying or folded over, that may be a sign that it needs to be replaced and not repaired.
The pins or cables that secure the belt ends do not usually last as long as the belt surface does, so try replacing these every year. If a baler belt has come apart due to bent or corroded connectors, replace the pins or cables. If the source of the problem is a tear in the belt from a foreign object, examine the tear itself. If the rip runs parallel to belt length, it may not require a repair. However, if the tear is large or runs perpendicular to belt length, the torn section requires a replacement.
Cut out the damaged piece, measure it, and cut a new piece of belt to size. Grind down the gripping surface at both ends of the patch, ensuring a smooth transition when it is secured to the old belt with hook splicers or alligator rivet fasteners.