Description

Caterpillar C27 2008 Parts Catalog – Factory OEM (695 Pages)

If you’ve ever spent a Saturday afternoon with a parts counter guy reading you part numbers off a computer screen that don’t match what you pulled off the engine, you know the headache. I’ve been there – that’s why I won’t touch a rebuild or a major overhaul without the factory parts breakdown in front of me. The Caterpillar C27 2008 Parts Catalog is exactly that: the same binder of exploded diagrams and part numbers that Caterpillar dealerships use. 695 pages. No aftermarket shortcuts. No guesswork on what bolt or seal goes where.

What This Parts Catalog Actually Covers

This is a Parts Catalog, not a service manual. It doesn’t tell you how to rebuild the fuel injection pump – it tells you what part number goes into the pump and what the factory calls it. For the C27 Industrial Engine (Serial Number TWM1-up), the catalog is broken into major systems. You get the full engine arrangement – core assembly, basic engine, lubrication, cooling, air inlet/exhaust, fuel, electrical/starting, operator station, hydraulic, and enclosures. Each group has its own exploded view with reference numbers tied to the part descriptions.

CAMSHAFT GP and Cylinder Head – Getting the Right Parts

When you’ve got a valve train issue – worn cam lobes, broken rocker arms, or a cylinder head that needs a full set of valves and guides – you need the exact factory part numbers. The Camshaft GP section (page 26 in the PDF) lists every camshaft, bearing, and thrust washer. The CYLINDER HEAD AS and CYLINDER HEAD GP sections break down the head casting, valve guides, seats, springs, and retainers. I’ve seen guys order a cylinder head gasket set from an aftermarket supplier only to find the coolant port alignment is wrong – that doesn’t happen when you’re working from the OEM catalog.

Lubrication and Cooling System Groups

Oil leaks and coolant leaks are the most common problems on high-hour C27s. The LUBRICATION SYSTEM section covers the oil pump, filter base, lines, and the entire turbocharger oil supply circuit. The COOLING SYSTEM section gives you the water pump, radiator, coolant conditioner element, and all the water line assemblies. If you’re replacing an oil cooler core, the CORE GP- OIL COOLER page shows you the gasket set and the correct core part number. Same for the water pump – you get the pump GP and all the gaskets and seals separately, so you can order exactly what you need instead of buying a whole assembly.

Air Inlet and Exhaust System – Turbo and Manifolds

The AIR INLET AND EXHAUST SYSTEM section covers everything from the air cleaner and precleaner to the turbocharger and exhaust manifold. The TURBOCHARGER GP page gives you the cartridge, turbine housing, and compressor cover parts. The MANIFOLD GP- EXHAUST lists the manifold with gaskets and mounting hardware. If you’re replacing a cracked exhaust manifold, you get the correct bolt torque specs referenced in the service manual – this catalog doesn’t include torque values, but it does list the fastener part numbers. That matters because using the wrong bolt length can strip the threads in the cylinder head.

3 Reasons to Choose OEM Documentation

First, aftermarket parts catalogs often use generic descriptions that don’t match the factory nomenclature – you can end up with a seal that’s close but not right. Second, the OEM catalog includes supersession information: if a part has been updated, the factory lists the new number. Third, the exploded views show you exactly how the parts fit together, so you can spot missing o-rings or brackets. Caterpillar C27 Training Manual – Factory ACERT Specs covers the service procedures, but this parts catalog is what you use when you’re standing at the parts counter.

Fuel and Electrical Systems – Injectors, Sensors, and Wiring

The FUEL SYSTEM section is critical for anyone working on the high-pressure common rail injection. It includes the fuel injection pump GP, fuel transfer pump, water separator/fuel filter, and all the fuel lines. The ELECTRICAL AND STARTING SYSTEM section covers the alternator, starting motor (both air and electric), battery cables, and the whole sensor family – coolant level, liquid level, position, pressure, speed, and temperature sensors. If you’re replacing a wiring harness, the WIRING GP- ENGINE ELECTRONIC page gives you the harness part number with all the connector shells and terminals listed separately. Automotive Industry Overview This level of detail is what separates an OEM catalog from a generic one.

Who Should Buy This Catalog?

If you’re a shop owner or a DIYer working on an industrial C27 engine that powers a generator set, pump, or marine application, this catalog saves hours of phone calls. Beginners will appreciate the structured layout – each system is broken into groups, and the index at the back (in English, French, German, Spanish) lets you find any part by name. Professionals will use it to cross-reference serial number changes. The catalog covers the C27 engine only – not the vehicle or equipment it’s installed in. For the chassis or hydraulic attachment parts, you’d need the specific equipment manual. Automotive Industry Overview

Source Authenticity: OEM vs Aftermarket

I’ve seen aftermarket parts catalogs that list the wrong valve seat insert material for a C27 cylinder head. Caterpillar uses specific hardness and interference fits. The only way to get the correct part number is from the factory source. This PDF is an exact reproduction of Caterpillar’s internal SEBP4496-11 manual, published June 2008. It’s not a scan of a scan – it’s the original digital file with bookmarks that let you jump to any section. I’ve been turning wrenches since 1995, and I will not use aftermarket documentation for critical engine parts. Period. Caterpillar C15 C27 C32 C18 2004 Training Manual Review is a companion if you need the theory, but for part numbers, this catalog is the only source I trust.

FAQ

Does this catalog include part numbers for the fuel injection pump?

Yes. The PUMP GP- FUEL INJECTION section lists the injection pump assembly, along with seals, gaskets, and mounting hardware. Each component has its own part number.

Can I use this to order parts for a C27 engine in a different application?

The catalog is for the C27 Industrial Engine with core arrangement TWM1-up. If your engine is in a different serial number range or application (e.g., marine propulsion), the parts may differ. Check the engine serial number against the table in the GENERAL INFORMATION section. For a C27 in a heavy-duty truck, you would need the vehicle-specific parts manual.

How are the parts grouped?

Each system (e.g., BASIC ENGINE) contains groups like CAMSHAFT GP, CYLINDER HEAD GP, PISTON & ROD GP. Each group has an exploded diagram with callouts. The part number, quantity, and description are listed below the diagram.

Is this the same as the service manual?

No. This is a Parts Catalog – it lists part numbers and assembly views. The service manual contains torque specs, repair procedures, and diagnostic information. Caterpillar C27 C32 DWB1 SXC1 WDR1 2008 Service Manual | OEM Factory Specs is the companion you need for repairs.

Bottom line: if you’re tearing into a C27 and need the right parts, don’t rely on a generic supplier’s website. Get the factory document. Access the Factory Manual now and have the original 695-page PDF on your tablet or printed out. It’ll pay for itself the first time you avoid ordering the wrong camshaft bearing.