It Is An Original Case 821F, 921F Tier IV Wheel Loader Part Catalog Manual Which Covers All The Parts Information You Need. This Manual Can Be Used By Anyone From A First Time Owner/Amateur To A Professional Technician. Even The Most Novice Mechanic Can Also Easily Follow The Step-By-Step Guides Which Are Made Simple By The Illustrations And Drawings. Keep This Manual Handy And Use It Often. Performing Routine, Preventive Maintenance Will Save You Time & Money By Helping To Prevent Premature Failure And Unnecessary Repairs.