Kato HD820III Parts Catalog – OEM Parts List for Hydraulic Excavator

Description

Look, I’ve been turning wrenches for 28 years. Nothing burns my time faster than ordering a part from a third-party catalog and getting the wrong one because the diagram was drawn by someone who’s never touched a wrench. If you’re a mechanic or an owner keeping a Kato HD820III excavator running, you need the real thing: the factory Parts Catalog. Not a scan from a copy of a copy. This is a 339-page document from Kato themselves, covering the HD820III fully hydraulic excavator. It’s not a repair manual—it’s the parts bible.

FUEL SYSTEM: Parts Breakdown for the HD820III

Every machine has a fuel system that needs parts replaced. This catalog breaks down the FUEL SYSTEM (フュエルシステム) into individual components. You get the exact part numbers for fuel tanks, filters, lines, and fittings. No guessing. Page 4 shows the table of contents where you can locate the FUEL SYSTEM section. That’s where you start.

BOOM, ARM, and BUCKET: Component Sections

The front attachment section covers the boom, arm, bucket, and optional attachments. You get exploded diagrams with part numbers. If you need to replace a pin or bushing, this is where you find the right size. The ARM and BUCKET sections are listed separately in the MACHINE COMPONENT PARTS CONTENTS on page 5.

Why the OEM Parts Catalog Matters

Aftermarket part catalogs often combine multiple model years or use generic drawings. That’s fine for a loose idea, but when you’re holding a bolt that needs to thread into a specific casting, you need the factory number. Kato designed the HD820III with specific part numbers for each revision. This catalog matches serial numbers 1501 and up. You get the exact list. No cross-referencing errors.

Are You Using Aftermarket Part Numbers?

If you’ve been ordering parts from an online listing that says ‘fits Kato HD820III’ without a factory number, you’re risking downtime. The cost of the wrong part plus the return shipping eats your profit. This factory Parts Catalog eliminates that. Every part number is verified by Kato. Use it to order from any dealer. They’ll recognize the numbers.

339 Pages of Factory Specs

That’s the bulk of this document. You get 339 pages of part listings, diagrams, and indexes. Sections include POWER TRAIN, SLEWING SYSTEM, OPERATING SYSTEM, COOLER & HEATER, TRACK SHOE, LOWER STRUCTURE, CAB & ACCESSORY, HYDRAULIC PIPING, LUBRICATION SYSTEM, ELECTRIC EQUIPMENT, and TOOLS & OTHERS. Plus a full MACHINE COMPONENT PARTS INDEX and SUPERSTRUCTURE section. You also get the crane attachment parts if your unit has that option. The index at the end lets you search by part number if you have one. Keep this on your tablet in the shop.

You want the right part. You need this catalog.

To use this catalog effectively, start with the table of contents on page 4. Find your section, then flip to the page indicated. Each part is listed with a reference number and description. Cross-reference the MACHINE COMPONENT PARTS INDEX for quick lookup.

Frequently Asked Questions

Is this a repair manual or a parts catalog?

Parts catalog only. No repair procedures.

How do I use the part numbers from this catalog?

Each part is listed with a reference number and description. Cross-reference with the index on page 4 to find the correct section. For example, the FUEL SYSTEM section uses the heading ‘フュエルシステム FUEL SYSTEM’. You’ll see part numbers for fuel tank, filters, lines, and fittings. Use those numbers when ordering from Kato dealers. Do not trust aftermarket conversions.

Access the Factory Manual now and stop guessing your part numbers.