Caterpillar 320C / 320C L Track-Type Excavator Service Manual (P/N XEBP7956-03)

• Covers 2004 Caterpillar 320C and 320C L Track-Type Excavators powered by the 3066 engine.
• Official Caterpillar publication XEBP7956-03, released December 2004.
• This 1,229-page parts book provides the specific group and component data required to identify serviceable parts for the FBA, GAA, MAA, and PAA machine serial number prefixes.
• Contains 58 exploded-view assembly diagrams with complete part identification lists spanning 12 component categories.

Parts Arrangement and Assembly

Tearing down a piece of heavy equipment means you need exact part numbers to get it back on the job site. This parts catalog is structured specifically for workshop technicians and fleet owners who need to quickly match hardware to factory specifications. It breaks down the entire machine by assembly group. You will find detailed individual part breakdowns for the 3066 basic engine, covering the cylinder head, valve mechanism, block assemblies, and the complete lubrication system.

The diagrams do not just show the big pieces. They isolate auxiliary attachments like boom lines, track guides, and various bucket configurations. Clear exploded-view illustrations separate early and late production runs. This distinction is critical when ordering serviceable items for specific FBA or GAA prefixes to prevent costly downtime.

Component Identification and Specifications

Accurate documentation eliminates guesswork at the parts counter. The text catalogs exact OEM part numbers for complex assemblies like unit injectors and fuel injection pump components. Cooling system breakdowns cover radiator cores and fan assemblies down to the exact hoses and clamps required for your specific serial range. Engine assembly data highlights internal components—valves, pistons, and connecting rods—giving you a reliable reference for major overhauls.

Beyond part numbers, the manual includes essential reference capacities to support routine maintenance and major teardowns. Specification records confirm the cooling system capacity, while capacity reference data lists the fuel tank volume at 410 L. Hydraulic standards dictate a main relief system pressure of 34,300 kPa.

Working on heavy machinery carries inherent risks. High-pressure hydraulic systems and heavy components require proper training. Verify all service procedures with a certified heavy equipment technician before initiating any teardown or parts replacement.