Description

Caterpillar C6.6 2007 Parts Catalog

Ordering parts for a C6.6 with an aftermarket catalog is a good way to get the wrong bearing set and waste a week. I have seen it happen. A guy pulls a part number from a third-party site, orders it, and finds out it doesn’t match his engine serial number. Then he is stuck with a part he cannot return. That is why you need the actual Caterpillar C6.6 2007 Parts Catalog – 1184 pages of OEM part numbers, exploded views, and cross‑references that match the factory build sheet. This is the same document the dealer parts counter uses.

Caterpillar C6.6 2007 Parts Catalog: What’s Inside

Open this manual and you get the full factory breakdown. The table of contents splits the engine into logical groups: ENGINE ARRANGEMENT, BASIC ENGINE, LUBRICATION SYSTEM, COOLING SYSTEM, AIR INLET AND EXHAUST SYSTEM, FUEL SYSTEM, ELECTRICAL AND STARTING SYSTEM, and SERVICE EQUIPMENT AND SUPPLIES. Each section lists every group (GP) and assembly (AS) with its own part number index. For example, the BASIC ENGINE section covers ADAPTER GP‑AUXILIARY DRIVE, CAMSHAFT GP, CRANKSHAFT GP, CYLINDER HEAD GP, PISTON & ROD GP, and many more – each with detailed illustrations. This is not a condensed aftermarket table; it is the real deal.

1184 Pages of OEM Part Data

Page count is not filler. Every one of those 1184 pages carries factory-verified part numbers and reference drawings. The manual starts with GENERAL INFORMATION on page 1, including instructions on how to read the parts list and where to find the engine serial number. Page 2 gives you a product and dealer information sheet to fill out – useful for record keeping. Having the full page count means you are not missing any supersession or revision. If a part was updated mid‑year, it is listed here.

Engine Arrangement Breakdown

The ENGINE ARRANGEMENT section lists seven primary engine configurations (ENGINE AR, ENGINE AR‑PRIMARY, etc.). Each configuration shows which basic engine components are installed. When you need to order a long block or a specific bracket, you look up your engine AR group first. The catalog gives the part numbers for the whole assembly and for each individual piece. This is where you verify that the flywheel housing matches your application – a mistake here means the starter won’t align.

What Parts Are Covered in the Fuel System Section?

Fuel system parts are notorious for being misordered. The FUEL SYSTEM section includes INJECTOR GP‑FUEL, PUMP GP‑FUEL INJECTION, PUMP GP‑FUEL TRANSFER, RAIL GP‑FUEL, FILTER GP‑FUEL, and LINES GP‑FUEL. Each group has its own illustration with callouts. The part number index at the end of the manual cross‑references every number used in the book. If you are replacing injectors on a C6.6, you need the correct injector group based on the engine serial number prefix. This manual tells you which one fits.

Use the Part Number Index Correctly

The last section is a PART NUMBER INDEX that lists every part number alphabetically and numerically. It also includes separate indexes in French, Spanish, Portuguese, and German. Do not guess – find the part number in the index, note the page, and verify the illustration. I have watched guys skip this step and order a water pump for a different cooling system configuration. The manual also has a SUPPLEMENTAL COOLANT ADDITIVES section that lists the correct SCA part numbers – ignore this and you could damage the cooling system.

One common mistake: using a parts catalog from a different year. The 2007 edition is specific to the C6.6 Industrial Engine with serial number prefix 6661‑Up. If you have a later engine, you need the corresponding manual. Check the serial number before ordering. Caterpillar C6.6 Industrial Engine 2008 Operators Manual covers operation and maintenance, not parts. For repair procedures, you want the Caterpillar C6.6 Industrial Engine Service Manual. And if you need the drain intervals, refer to the Caterpillar C6.6 Industrial Engine Operation and Maintenance – Section: Drain Fl which lists those intervals.

For context on why OEM documentation matters in heavy equipment, see the Automotive Industry Overview and Automotive Industry Overview. These sources explain the standards behind factory specifications.

Safety and Verification Notes

Using the wrong part can cause a failure that sends a 2‑inch chunk of steel through the block. Every time I see a customer bring in a part that came from a generic catalog, I cringe. The OEM parts catalog reduces that risk. Always cross‑reference the part number with the engine serial number and the illustration. The manual includes a REPAIR ALTERNATIVES section that lists remanufactured part numbers – useful for saving money without guessing.

Does this parts catalog include repair procedures?

No. It is a parts catalog with part numbers and illustrations, not a service manual.

How do I look up a part number if I only know the part name?

Use the index section which lists parts alphabetically in English, French, Spanish, Portuguese, and German. The index starts near the front. Once you find the part name, it gives you the page number where exploded views and part numbers are listed. Cross-check with the engine serial number range in the General Information section on page 1 to make sure the part applies to your specific engine configuration.

If you are working on a C6.6 and need the correct part numbers the first time, get the actual factory manual. Stop relying on third‑party catalogs that might have outdated information. Access the Factory Manual now and keep it on your workbench.