Description

Fiat-hitachi EX120 Parts Catalog – OEM Factory Parts Breakdown

If you have ever ordered a part for an EX120 and got the wrong one because you guessed at the serial number break or used a third-party list, you know the frustration. This Fiat-hitachi EX120 Parts Catalog runs 418 pages of factory-sourced exploded diagrams and OEM part numbers. It is the same document the dealer parts counter pulls up when you call in a hurry. I have seen too many guys bolt on a fuel pump that does not match the engine serial and then wonder why the machine runs lean. This catalog fixes that before you spend the money.

Engine and Fuel System Parts – Exact OEM Breakdown

The ENGINE section (pages not numbered in the catalog, but the bookmark tree shows it clearly) covers every component from the block to the injector lines. The FUEL PIPINGS, FUEL TANK, FUEL FEED PUMP (OPTION), and FUEL DOUBLE FILTER (OPTION) sections give you the exact part numbers for fuel lines, filters, and tank hardware. If you need the charge pressure regulator on a 4BD1T engine, the catalog lists the service code Z for engine-related parts. Do not trust aftermarket cross-reference lists for these numbers – the factory indexing is the only way to be sure.

Undercarriage and Track Frame Components

Track frames, front idlers, adjusters, upper and lower rollers, travel device, center joint – all broken down in the UNDERCARRIAGE chapter. For the rubber crawler option, there is a separate RUBBER CRAWLER PARTS section with different part numbers for the track frame and rollers. The catalog includes service codes like D (assembly-only replacement) and S (service-only parts), so you know whether you can buy the roller separately or have to order the whole assembly. That kind of detail saves a phone call to the dealer.

Hydraulic Piping Schematics – 20+ Pages of Oil Cooler and Main Lines

OIL COOLER PIPINGS (1) through (3), MAIN PIPINGS (1) through (4), SWING PIPINGS, and every PILOT PIPINGS subsection from 1-1 to 6-2 – this catalog lays out each hydraulic circuit with individual part callouts. If you are rebuilding a valve bank or chasing a leak in the pilot lines, you need these diagrams. The part numbers include O-rings, fittings, and hoses listed by length and bend. One look at the PILOT PIPINGS (3-1) page tells you exactly which hose goes from the control lever to the main valve. No guessing.

Optional Attachments and Special Configurations

The catalog covers every option Fiat-hitachi offered: multi lever pipings, air conditioner units, tropical covers, long arm (3.01m), short arm (2.1m), bucket sizes from 0.3 to 0.9 JIS 94, clamshell buckets, hose rupture valves for boom and arm, and slope-finishing blades. Each option has its own bookmark section with unique part numbers. If your machine has the pressure-type air-conditioner controller, the catalog lists those parts separately from the standard type. You will not find that level of granularity in a generic aftermarket parts list.

Why You Want Factory Documentation, Not a Reprint

I have seen reprints where the part numbers are smudged, the serial number breaks are missing, and the service codes are left out because the copier could not read the original. This is a direct scan of the original Fiat-hitachi publication. The foreword explains the part numbering system and the service code meanings (W for local machining required, H for precision parts, K for service kit, R for shims, Z for engine parts, OP for optional). If you ever need to order a bucket-hook assembly or a one-point rupper [sic], the catalog gives you the correct illustration and the part number sequence. Pair this with the related HITACHI EX120 Parts Catalog or the HITACHI EX120 Hydraulic Excavator Parts Catalog if you need the operator’s manual as well. For larger Fiat-hitachi models, check Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog.

FAQ

Does this parts catalog include torque specs or repair procedures?

No. This is strictly a parts catalog – exploded diagrams, part numbers, quantities, and service codes. For torque values and disassembly steps, you need the service manual.

Can I use this catalog to order parts for an EX120 with a different serial number range?

The catalog is printed for serial number 12V-40001 and later. If your machine is older, some part numbers may differ. The foreword advises contacting your nearest Fiat-hitachi branch if your serial falls outside that range. Do not guess – check the serial number on the main frame nameplate.

Are the part numbers in this catalog still current?

Fiat-hitachi updates part numbers over time. This catalog reflects the parts as of its publication date. Some numbers may have been superseeded. Use the part number to cross-reference with the dealer’s current system. The catalog is the original reference, not the final word – but it gets you 95% of the way there without the markup of a dealer lookup.

Does the catalog cover the engine internally?

The engine chapter includes mounting brackets, fuel system components, and external parts. Internal engine components (pistons, rings, bearings) are covered in a separate Isuzu diesel engine parts catalog (4BD1T). The foreword says to refer to the separate Isuzu catalog. Do not expect to find a piston ring part number for this engine in this document.

Stop burning billable hours chasing wrong part numbers. Access the Factory Manual and get the OEM exploded views that match your machine’s serial number break. You will have the part numbers, service codes, and quantities ready before you call the dealer. Access the Factory Manual.