The McCormick 6677181A1 Gear is an authentic OEM component designed for critical power transmission within agricultural machinery. This durable gear is compatible with various McCormick X4 series tractors, including models X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X4.35M, X4.45M, and X4.55M. It also serves as an equivalent part for Landini 4 series tractors such as 4-060, 4-070, 4-080, 4-090, 4-100, 4-110, 4-060M, 4-070M, 4-080M, and 4-090M. Manufactured to precise specifications, this gear ensures optimal performance and longevity in demanding agricultural applications.