Description

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. Access the Factory Manual now and keep it on your tablet or printed out in the shop.