Description

Fiat-hitachi EX300-5, EX300LC-5, EX330LC-5, EX350H-5, EX350LCH-5 Parts Catalog

You’ve got a machine down because the seal kit you ordered is off by a millimeter. Or worse, you bolted on the wrong swing motor and now the hydraulic lines don’t line up. I’ve seen it happen. Parts catalogs aren’t sexy, but they keep you from turning a two-hour job into a two-day parts chase. This Fiat-hitachi EX300-5, EX300LC-5, EX330LC-5, EX350H-5, EX350LCH-5 Parts Catalog is exactly what the dealer uses – 120 pages of OEM exploded views and part numbers. No aftermarket interpretations.

Pump Section: Exploded Views and Seal Kits

The main hydraulic pump assembly – both piston and gear pumps – is broken down into individual components. Main pump housing, port block, swash plate, piston slipper assemblies, and every O-ring, backup ring, and square-cut seal. Page 101 covers the regulator and compensator stack. If you’re swapping a failed regulator coil, you need the exact shim stack sequence. This book gives it to you in the same format the factory uses. No guesswork on which shim goes where.

Motor ; Oil: Drive Motors and Lubrication Diagrams

Travel and swing motors are grouped under the MOTOR ; OIL header. That’s not a typo – the OEM chose that label to bundle all rotating components and their oil circuits. Inside you’ll find the swing motor disassembly (brake piston, friction plates, output shaft) and the travel motor with its relief valve cartridge. Oil cooler and filter housing breakdowns are included. Need the charge pressure relief setting? The manual doesn’t list torque values for that, but the valve cartridge number is right there on the diagram.

Valve Group: Pilot Lines and Main Spools

Main control valve is where most hydraulic confusion lives. This section shows every spool, sleeve, spring, and plug individually. The PDF bookmark calls it VALVE, and it covers the entire bank – from the PPC pilot valve to the main relief. If you’ve ever mixed up the boom drift reduction spool with the arm flow control, you’ll appreciate the numbered callouts. Each part gets a unique identifier. Cross-reference that against the Parts Index at the back.

Cylinder Breakdown: Piston Seals, Rods, and Gland Nuts

Boom, arm, and bucket cylinders each get their own exploded view. Head end seal kit, rod end bearing, wiper seal, and cushion ring. Page 73 (the cylinder section) shows the exact orientation of the lip seals. One common mistake – installing the buffer ring backwards – creates leak paths within a hundred hours. This catalog prevents that. Also lists dimensions for the piston and rod. Not all aftermarket catalogs show that.

Parts Index: Finding the Number Fast

The last several pages are a numerical parts index. Every part number used in the book is listed alphabetically by number. That’s the fastest way to order a replacement without flipping through every page. If you’re dealing with a salvage yard or want to check availability, the part number is the only language the parts counter understands. This index covers all models in the series: EX300-5, EX300LC-5, EX330LC-5, EX350H-5, EX350LCH-5. The EX330LC-5 is identical to the EX300LC-5 – the manual even has a note on page 5 about that North America designation.

Related Manuals

• HITACHI EX300-5 Series Parts Catalog
• Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog
• Fiat-hitachi ZX50U-2 Parts Catalog – 120 Pages of OEM Specs

For a wider look at heavy equipment documentation, you can check Automotive Industry Overview. Also relevant: Automotive Industry Overview.

FAQ

What models are covered in this parts catalog?

EX300-5, EX300LC-5, EX330LC-5, EX350H-5, and EX350LCH-5.

How do I identify the correct part number for my machine?

Find your machine’s product identification number (PIN) from the mainframe nameplate under the cab. Then locate the assembly diagram for your hydraulic component (pump, valve, cylinder) in the catalog. Each part has a figure number and callout. Match the callout to the parts list next to the diagram. That list gives you the OEM part number exactly as Hitachi defines it. Cross-reference with the Parts Index if you need alternative lookup. Order using that number and your PIN – the parts counter may require both to confirm superseded revisions.

Every time I walk into a shop where they rely on generic parts catalogs, I see reuse of old gaskets and mismatched piston rings. That costs money. Get the genuine reference. Access the Factory Manual and keep it on your tablet next to the coffee cup.