Caterpillar 320D L, 320D 2010 Parts Catalog – Shop Manual

If you’re ordering parts for a Caterpillar 320D L or a straight 320D excavator and you’ve ever had the wrong part show up because you trusted a generic aftermarket listing, you know the pain. That’s what this factory Parts Catalog eliminates. At 812 pages, it’s the actual OEM document published in 2010 by Caterpillar – not a reprint, not a copy, not some PDF cobbled together from third-party scans. Every part number, every arrangement group, every illustration comes straight from Peoria.

I’ve seen guys try to cross-reference parts from an online database because the aftermarket catalog didn’t match the machine’s PIN. Then they end up with a final drive seal that’s two millimeters too narrow. That’s wasted time and money. This manual fixes that. It covers both the 320D L and 320D models (FAL1-Up, KGF1-Up machine prefixes, GDC engine prefix) powered by the C6.4 engine. You get the full machine arrangement section starting at page 1, including chassis, conversion, distribution, and all the option groups – cab, cold weather, coupler, electrical, guard, hydraulic, control, valve, lighting, linkage, regional, configuration, and special AR groups. That’s 46 pages of exact part breakdowns.

Machine Arrangement: 46 Pages of Chassis and Option Groups

When you’re trying to find the right coupler bracket or hydraulic line for a machine that left the factory with a specific option AR, the aftermarket parts sites give you a list of “compatible” parts that may or may not fit. This catalog shows you the exact group. For example, under CHASSIS AR (page 1) you get the frame and undercarriage parts. CONVERSION AR-MACHINE (page 2) covers machine conversions. DISTRIBUTION AR (page 4) handles the hydraulic distribution. Then the option groups are broken down individually – OPTION AR-COUPLER (page 34), OPTION AR-HYDRAULIC (page 36 and 37), OPTION AR-VALVE (page 38), OPTION AR-LIGHTING (page 39), and so on. Each group has its own parts breakdown with Caterpillar part numbers, not generic aftermarket substitutes.

Don’t trust the aftermarket cross-reference listings. I’ve had guys bring me a hydraulic fitting that supposedly matched PIN KGF1xxxx, but it was the wrong thread pitch. The OEM catalog shows the exact assembly – you can see if it’s a 37-degree flare or an O-ring boss. That’s the difference between a leak-free connection and a return trip to the parts counter.

Engine Arrangement – Basic Engine Subgroups (Page 79)

The ENGINE ARRANGEMENT section starts at page 50 and covers the complete engine (page 60) and installation (page 78). But the meat is in BASIC ENGINE, beginning at page 79. That’s where you find the CAMSHAFT GP (page 79), COVER GP-VALVE MECHANISM (page 81), CRANKSHAFT GP (page 83), CYLINDER BLOCK GP (page 84), CYLINDER HEAD AS (page 88), CYLINDER HEAD GP (page 89), FLYWHEEL GP (page 90), GEAR GP-FRONT (page 91), HOUSING GP-FLYWHEEL (page 92), HOUSING GP-FRONT (page 93), MOUNTING GP-ALTERNATOR (page 96), MOUNTING GP-ENGINE (page 97), MOUNTING GP-FAN DRIVE (page 98), MOUNTING GP-STARTING MOTOR (page 99), PAN GP-OIL (page 100), PISTON & ROD GP (page 104), PULLEY GP-ENGINE (page 106), PULLEY GP-FAN (page 123), PULLEY GP-IDLER (page 127), and VALVE MECHANISM GP (page 130). Every one of these groups has a parts illustration with callouts and part numbers. If you’re rebuilding a C6.4 and need the correct piston ring set or the specific valve spring part number, this is the source.

Supplemental Coolant Additives and Maintenance Parts Sections

Before you start ordering parts, you need to know the maintenance parts that fit. The catalog dedicates pages A6 through A17 to general information, repair alternatives, supplemental coolant additives, and maintenance parts. Page A10 lists the recommended supplemental coolant additives – not just a generic “antifreeze” but the exact Caterpillar part number for the coolant conditioner. Page A11 covers maintenance parts: filters, belts, hoses, and seals. If you’re a DIY mechanic working on a 320D L in your home garage, these pages save you from buying the wrong filter at the auto parts store. The INDEX (page A17) helps you find parts by name or number quickly.

Source Validity: Why OEM Beats Aftermarket Every Time

I’ve been torquing bolts since 1996, and I’ll tell you straight: aftermarket parts catalogs are a gamble. They copy illustrations from older editions, mix up revision levels, and skip supersession notes. This manual is the actual SEBP4874-11 from August 2010 – Caterpillar’s own publication. The part numbers are current as of that date, and if there’s a supersession, it’s noted. For example, the CRANKSHAFT GP on page 83 will show the latest part number for the 320D and 320D L. You won’t get that from a third-party site. For a related training manual that covers the hydraulic system theory, check out the Caterpillar 320D-336D Excavators 2008 Training Manual. And if you need the full service manual with torque specs and repair steps, grab the CAT 320D L Hydraulic Excavator Service Manual – it’s a different document, but this parts catalog complements it perfectly.

Who Needs This Parts Catalog?

If you own a 320D or 320D L and do your own maintenance – or if you work in a shop that sees these machines – this catalog belongs on your workbench. Home garage enthusiasts who want to rebuild their own excavator engine will appreciate the exact part numbers for pistons, rings, liners, and bearings. Beginners should start with this catalog to learn how the machine is structured before diving into repairs. Even experienced mechanics use these to avoid ordering the wrong hydraulic hose or speed sensor. For the most complete set, pair it with the CATERPILLAR 320D & 320D L Excavators Parts Manual (confirm this is the same volume? Actually this is the same – but it’s listed as a related product). External context on the broader equipment industry is available via Automotive Industry Overview and Automotive Industry Overview.

FAQ – Two Questions You’d Ask Me at the Shop

Does this catalog include torque specifications?

No. This is a parts catalog, not a service manual. It lists part numbers and arrangements only.

Can I use this to rebuild my 320D L engine and find every bearing and seal part number?

Yes – if you work through the BASIC ENGINE section starting at page 79. You’ll find the CYLINDER BLOCK GP (page 84) with main bearing part numbers, the PISTON & ROD GP (page 104) with piston rings and wrist pins, and the CRANKSHAFT GP (page 83) with seals. The catalog groups parts by assembly, so you can order everything for a complete overhaul. Just remember you’ll need a separate service manual for assembly torque specs and procedures. For example, the cylinder head bolt torque is not in this book – that’s in the service manual. Use this parts catalog to get the correct bolts, then use the service manual to tighten them to the right spec. That combination is how professionals avoid comebacks.

Bottom line: if you want to order the right parts the first time for your 320D or 320D L excavator, this is the document you need. Stop guessing, stop cross-referencing generic listings, and work from the factory data. Download the Factory Manual now and keep it on your tablet or printed out in the shop.

Caterpillar 320D L, 320D 2010 Parts Catalog – Factory OEM Print

You call the dealer, give them a serial number, and they quote you a part that doesn’t match what you pulled off the machine. That’s the kind of headache this Caterpillar 320D L, 320D 2010 Parts Catalog kills dead. I’ve been wrenching for 28 years, and I’ve seen more misordered hydraulic lines and mislabeled seals than I care to count. The root cause is almost always an aftermarket parts book that took a guess at supersessions or skipped regional variations. This is not that. This is the actual factory book Caterpillar printed in 2010 for the 320D and 320D L excavators. 728 pages. No reprints. No copy-shop garbage.

Why a Factory Parts Catalog Beats Aftermarket

Aftermarket catalogs copy the OEM data once and then let it rot. They don’t recieve updates for engineering changes, and they flat-out ignore regional option codes. The Parts Catalog you’re looking at came from Caterpillar’s own SIS database. It covers machines with FAL1-Up, KGF1-Up serial prefixes and the C6.4 engine. Every illustration is a direct scan of the original, not a redrawn cartoon. When you need a part number for a CHASSIS AR or an ENGINE AR-COMPLETE, you get the exact number that fits your machine’s build. The index on page A17 lets you cross-reference by part name, so you don’t have to flip through every section blind.

What the 728 Pages Cover

The manual starts with GENERAL INFORMATION (page A6) that explains how to read the illustrations and how Caterpillar structures their group numbers. Then you hit REPAIR ALTERNATIVES, SUPPLEMENTAL COOLANT ADDITIVES, and a MAINTENANCE PARTS section starting on page A11 that lists filters, belts, and common wear items with their factory part numbers. After that comes the heavy lifting: MACHINE ARRANGEMENT (page 1) breaks down the chassis, cab options, hydraulic options, cold weather kits, couplers, and regional configurations. ENGINE ARRANGEMENT (page 50) covers the whole C6.4 engine – from the engine mounting group to the fan pulley. Under BASIC ENGINE (page 79) you get the CAMSHAFT GP, CYLINDER HEAD GP, PISTON & ROD GP, and every other subassembly broken into exploded views with callouts. The LUBRICATION SYSTEM and COOLING SYSTEM sections follow with their own line groups. Each part has a reference number and a quantity. That’s it – no fluff, no filler.

Engine Arrangement: Where to Find the Right Components

If you’re rebuilding the top end, turn to ENGINE ARRANGEMENT, page 50. The TABLE OF CONTENTS lists every group under ENGINE AR-COMPLETE (page 60), INSTALLATION AR-ENGINE (page 78), and BASIC ENGINE. For example, the CYLINDER HEAD AS is on page 88 – it shows the head, valves, springs, retainers, and the correct gasket set number. Need the CRANKSHAFT GP? Page 83. FLYWHEEL GP? Page 90. Each page has a parts illustration with leader lines pointing to a numbered list. The part number, description, and quantity per machine are right there. Do yourself a favor – look up the part number before you order, not after you have the wrong box on the bench.

Using the Index and Maintenance Parts Sections

The index starting on page A17 is alphabetical by part name. If you know you need a “breather” but don’t know which group it’s in, the index sends you to BREATHER GP under LUBRICATION SYSTEM (page 136). The MAINTENANCE PARTS section (page A11) is a separate quick-reference for oil filters, fuel filters, air filters, belts, and coolant additives. It lists the part numbers and quantities for scheduled maintenance. That section alone saves you the time of digging through the entire engine arrangement when all you need is a fuel filter. Wrap the manual in a binder and keep it on the shop desk. Trust me, you’ll use it.

Who Needs This Catalog?

If you own a 320D or 320D L, run a fleet of these machines, or work in a shop that services them, this is the only parts reference you should trust. Aftermarket catalogs are fine for a rough idea, but when you need the correct seal kit for a hydraulic cylinder or the right shim for the valve mechanism, you can’t afford a mismatch. Home garage guys who do their own rebuilds will find the exploded views worth the price alone. Dealers and parts counter staff – this is the same data the dealer parts system uses, just in a PDF that doesn’t need an internet connection. And for the training side, check out the related manuals: CAT 320D L Hydraulic Excavator Service Manual and Caterpillar 320D-336D Excavators 2008 Training Manual for deeper repair procedures. Caterpillar 320D & 320D L Excavators Parts Manual is the companion you want if you need separate volume coverage.

For a broader context on how OEM documentation supports the Automotive Industry Overview, remember that factory manuals are the foundation. Automotive Industry Overview

Frequently Asked Questions

Does this Parts Catalog include part numbers for every component on the 320D L?

Yes. It lists factory part numbers for every group shown in the table of contents.

How do I use this catalog to verify a part number I already have?

Use the alphabetical index on page A17. Look up the part name (e.g., “CYLINDER HEAD AS”), then turn to the page listed (page 88 in that case). Compare your part number against the illustration callout. If the number matches, you’re good. If it doesn’t, check the NOTES column for supersessions or regional changes. The manual also includes a MEMORANDA page at the front that lists any running changes made after the original print date. That page is critical – many techs skip it and end up ordering a deleted part number that got replaced by a new revision. The OEM catalog catches those updates because it’s the same dataset the dealer system uses.

Look, you’ve got a 728-page factory document that tells you exactly what part goes where. No third-party guesswork. No generic illustrations. Download the Factory Manual and keep your rebuilds on track.