Service Manual for Case 621 Wheel Loader. Manual No. 8-73742. Issued November, 1989. 9 tabbed sections. Sections include: 1. General, 2. Engines, 3. Fuel Systems, 4. Electrical, 5. Steering, 6. Power Train, 7. Brakes, 8. Hydraulics, 9. Chassis/Mtd. Equipment. In correct Case binder. This is a large and very comprehensive manual over 4 1/2" thick and nearly 11 lbs. Includes schematics. First 5 sections show more use than the remaining sections which are like new.