. FOREWORD NECESSARY INFORMATION NECESSARY INFORMATION When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following items. ENGINE SERIAL NO. PLATE This is at the top at the rear of the engine on the right side of the machine. 1 - 6 PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIA On the center right of the fro nt frame. differs according to the territory. The design of the nameplate EPA: Environmental Protect ion Agency, U.S.A.