This is a flat rate manual, or service pricing guide (O-5) and does not give any actual service information. It gives you a time schedule telling how long it should take to complete a job on the listed equipment. This manual would be helpful to verify the hours you are being charged for labor, or to figure how many hours to charge for a job you are doing. Covered in this manual are the following tractors: 55 60 66 70 77 80 88 90 99 & 99GM.