When sourcing spare parts for Wirtgen milling machines, pavers, or recyclers, the most critical factor is Part Number Accuracy. Always cross-reference the OEM part numbers from the Wirtgen parts manual to ensure 100% compatibility. For wear parts like cutting picks (teeth), prioritize tungsten carbide tips with high cobalt content for superior abrasion resistance. For conveyor belts, ensure the tensile strength and heat resistance meet the original machine's operating parameters to prevent premature snapping or melting.