The Massey Harris 30 and 30K tractors, produced primarily in the late 1940s and early 1950s, represent a significant era in North American agricultural machinery. These tractors, often equipped with gasoline, diesel, or LPG engines and typically offering around 25-35 horsepower, are recognized for their robust design and historical importance. Known for their manual transmission with typically four forward and one reverse gear, they were built for durability and functionality in demanding agricultural environments. The Massey Harris brand itself is noted for its innovation, and these models are highly regarded by collectors and users for their enduring quality and operational capability.

This manual serves as an essential resource for the Massey Harris 30 and 30K tractors, providing comprehensive parts identification and listing. It covers a wide array of systems, including the engine, transmission, drive train, braking system, hydraulic system, PTO, and electrical components, among others. Detailed illustrations with part numbers and exploded diagrams are included to aid in the precise identification of OEM replacement parts. This document is invaluable for owners, mechanics, and technicians seeking to maintain, repair, or restore these vintage tractors, ensuring their continued functionality and preserving their historical integrity.