A crawler vehicle having a lower works comprising a carbody and a pair of crawler assemblies. Each of the crawler assemblies are removably connected to the carbody by a plurality of carbody to crawler connections. The carbody to crawler connection each comprise at least one keyway for aligning the connection components of the crawler assembly with the connection components of the carbody, and for preventing these connection components from becoming misaligned in response to eccentric forces or deflections generated between the carbody and each of the crawler assemblies.