Most OEM service manuals will also include troubleshooting flow charts, error codes and exploded views of components which are a great help for disassembly and re-assembly. An Operator's Manual typically describes basic equipment operation and maintenance.
A Parts Catalog is often large and broken down in to sections for different parts of your equipment. Parts Catalogs cover absolutely every aspect of your machine unless mentioned otherwise. Sometimes, the engine is covered in a separate parts catalog that is written specifically for the engine.Most of the time though, it's included in the main parts catalog. A parts catalog will arm you with the same exact information that your local service center has and includes exploded views of assemblies that are a great help with disassembly and re-assembly. Parts catalogs also include all part numbers for every part of your machine which makes for easy ordering of parts. Some of the printed versions of the older manuals won't have a good print quality, but most are fine. SECTION 1 - GENERAL TORQUE SPECIFICATIONS.
SCETION 2 - ENGINE AND RADIATOR REMOVAL ANDINSTALLATION. SECTION 3 - FUEL SYSTEM. SECTION 6 - POWER TRAIN. SECTION 9 - MOUNTED EQUIPMENT.