This is an original OEM CAT Manual on CD for C13 On-Highway Engine. This is the exact same service manual that Caterpillar dealer technicians refer to. It contains information on Specifications, Disassembly and Assembly, Testing & Adjusting, Troubleshooting, Schematics, and Operation and Maintenance Information. The files are in PDF format, Adobe Acrobat is required to view the information. Don't miss your chance to get a service manual for your machine at a great price!