. FOREWORD NECESSARY INFORMATION NECESSARY INFORMATION When requesting service or ordering replacement parts, please inform your Komatsu distributor following items. 1 - 6 of the PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE This is at t he front bottom rig ht of the operator's sea The desig n of the nameplate differs according to the ENGINE SERIAL NO. PL This is at t he front of the side face of the engine cyli nder block on the left sid e of the machine.