Description

Fiat-hitachi EX300-3, EX300LC-3, EX300H-3, EX300LCH-3 Parts Catalog

If you’re ordering parts for a Fiat-hitachi EX300-3 or one of its variants – EX300LC-3, EX300H-3, EX300LCH-3 – you need the factory parts catalog. I’ve been wrenching on heavy equipment for 28 years, and aftermarket parts catalogs are garbage nine times out of ten. This is the real deal.

This catalog runs 114 pages and covers every major hydraulic system: pump, motor, valve, cylinder. Each section shows exploded diagrams with factory part numbers. You won’t find cross-reference mistakes or missing supersessions here. The Automotive Industry Overview background aside, on a job site you need the right steel before you pull a wrench.

Pump Section: Identifying Hydraulic Components

Pump breakdowns are the first section. You get the main pump assembly with individual part numbers for gears, housings, seals. If you’ve ever ordered the wrong seal kit because an aftermarket catalog lumped two pump variants together, you know why this matters. The OEM listing distinguishes between standard EX300-3 and the high-lift EX300H-3 pump configurations.

Motor and Oil Sections: Don’t Skip the Small Parts

Travel and swing motors are under MOTOR;OIL. That semicolon in the TOC means it covers both motor assemblies and oil-related components like filters and coolers. Each motor gets its own exploded view. Service codes in the margin tell you if a part is a service kit (K) or needs local modification (W). You don’t guess – you read the code.

Valve Assembly: Exploded Views and Service Codes

The Valve section covers the main control valve, pilot valve, and any valve-related subassemblies. Page numbers aren’t listed in the TOC, but each valve gets a full page with each poppet, spring, and O-ring called out. Service codes like R (shims) and D (replace as assembly) save you from ordering parts you can’t install individually. I’ve seen guys waste a day because they didn’t check the D code.

Cylinder Parts and Rebuild Kits

Cylinder section covers all cylinders: boom, arm, bucket. Each cylinder is broken down into barrel, piston, rod, seal groups. The parts index at the back lets you cross-reference part numbers from any section. Need a rod seal for a EX300LC-3? Look up the number in the index, then flip to the cylinder page. That’s how you avoid ordering a bucket cylinder part for the boom.

114 Pages of Factory Specs – No Reprints

This is a scan of the original Hitachi parts catalog. Not a third-party reprint. Not a generic compilation. The PDF retains the Japanese/English bilingual layout and the original part number structure. If you’re maintaining a fleet that includes Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog, you’ll want this to keep consistency. Every part number starts with the correct prefix – no OCR errors that lead to wrong orders.

Related manuals: HITACHI EX300-3 Series Parts Catalog and Fiat-hitachi EX300-3 Series 1994 Operators Manual – OEM cover operations and service. This catalog is the parts companion.

Who Needs This Parts Catalog?

Shop owners and field mechanics doing rebuilds. If you’re tearing down an EX300-3 to replace a cylinder or reseal a valve, you need part numbers before you call the dealer. DIY owners with a single machine – same deal. One wrong phone order costs more than this catalog. The Automotive Industry Overview reference aside, equipment repair is about precision, not luck.

Does this catalog include torque specs?

No, it’s a parts catalog, not a service manual.

How do I find the right part number if the diagram shows multiple options?

Each exploded view lists the part number, description, quantity, and service code. If a part has variants (standard, oversize, undersize), they appear on consecutive lines. Check the service code column for OS or US. Then verify your machine serial number against the applicable serial range printed at the top of each section. The parts index at the back lists every number alphabetically – use it when you have a number but need the page.

Don’t waste time chasing wrong parts. Access the Factory Manual now and keep this catalog on your tablet or print it for the shop. You’ll reference it on every pump, valve, or cylinder job. When the parts counter asks for a number, you’ll have it.