Case Tractor C, D, L, LA, R, S, V, VA Series, 200B, 300, 300B 350, 400B, 500B, 600B Series, and 400, 700B, 800B Series Tractors I & T Manual. If you work on your own tractors, you need this service manual. Service procedures on all these tractors is packed into this 1 manual. It would cost hundreds of dollars to own service manuals for these tractors individually. We stock other manuals as well. Let us know your needs.