Description

Fiat-hitachi EX100-2 Parts Catalog – 511 Pages of Factory Specs

If you’ve ever tried to order a part for a Fiat-hitachi EX100-2 using a generic cross-reference, you know the drill. You get a box, it doesn’t fit, and you’re down a day and a half of billable time. This manual stops that. It’s the factory parts catalog—511 pages—direct from the people who built the machine. Aftermarket catalogs leave out the compatibility codes and serial-number breaks that tell you exactly which part goes on your unit. That’s not a gamble you want to take when a wrong seal can drain your hydraulic system overnight.

On page 3 you’ll find the service code legend: W for weld-to-fit, H for precision parts you don’t touch, D for assembly-only replacement, K for kit parts. These codes are why a factory catalog matters. You don’t get that from a third-party scan. Automotive Industry Overview

Upperstructure and Undercarriage: The Core Sections

Two sections you’ll reference most: UPPERSTRUCTURE and UNDERCARRIAGE. Upperstructure covers the swing frame, cab, engine mount, hydraulics, and control valve groups. Undercarriage includes track frames, final drives, idlers, rollers, and sprockets. Each part number is tied to a serial-number range (starting from Serial No. 30001). If your machine falls outside that range, the catalog still applies—check the “Applicable Serial No.” notes on each page. Fiat-hitachi issued this catalog for standard, North American, and Northern European specs, all flagged with , , or tags. Don’t order a part for a Texas machine unless you’ve verified fitment.

Reading the Service Codes: W, H, D, K, and More

Page 3 lists every service code you’ll encounter. W means the part needs field modification before installation—call the dealer. H means it’s a precision component (like a hydraulic pump cartridge); you don’t repair it, you replace it. D means you can’t buy the part alone; you buy the assembly it belongs to. K means the part is inside a service kit—order the kit, not the individual piece. R is for shims or adjustment parts where the quantity varies per machine. S indicates a service-only part not installed at the factory. Z marks engine-related parts (engine is covered in a separate Isuzu 4BD1 catalog). OP is optional equipment. OS and US are oversized and undersized parts. Ignoring these codes leads to returns and downtime. Respect them.

Does This Catalog Cover Offset Boom and Rubber Crawler Parts?

Yes. The table of contents lists OFFSET BOOM PARTS and RUBBER CRAWLER PARTS as separate chapters. If your EX100-2 has an offset boom configuration, you’ll find the boom cylinder, pivot pin, and linkage groups under that chapter. Rubber crawler sections include the rubber track bands, sprocket adapters, and unique idler assemblies. Don’t assume undercarriage parts are interchangeable between steel and rubber track machines—the catalog flags the differences with separate part numbers. HITACHI EX100-2 Parts Catalog

3 Reasons to Choose OEM Over Aftermarket Parts Catalogs

First, accuracy. Aftermarket catalogs often copy the original and miss the revision notes. This manual includes a “*” mark next to newly added parts, plus a compatibility column with symbols I, P, T, Y that tell you if a part supersedes or substitutes. Second, serial-number tracking. Every part is tied to a specific machine serial range, including break points marked by date (D90/10 for October 1990) or by front attachment number (F prefix). Third, the service codes I just described. Without them, you’re guessing whether a part can be replaced individually or requires an assembly. That’s not a risk you take on a 20-ton excavator. Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog

Parts Index: Find Any Part Number in Seconds

Flip to the end—the PARTS INDEX lists every part number in numeric order with the page number. If you have a part number from an existing component, you can look it up without flipping through the whole catalog. The index also marks new parts with an asterisk. This is the fastest way to confirm if a part has been superseded. You cross-reference the part number, find the page, and check the “Interchangeability” column for I, P, T, or Y. That tells you if you can use a different part number or if the original is obsolete. Fiat-hitachi ZX50U-2 Parts Catalog – 120 Pages of OEM Specs

How do I find the correct part for my machine’s serial number?

Look at the top of each page for the “Applicable Serial No.” field. If your serial number 12L-30001 falls after the listed break, the parts on that page apply unless a specific part has its own serial range noted in the column.

What do the compatibility symbols I, P, T, Y mean on page 3?

I means you can substitute the listed replacement part for the original, but not vice versa. P marks a prohibited part—use the replacement only. T means you must replace the part with a set of multiple parts. Y means full bidirectional interchangeability. Always check the “Interchangeability” column before ordering—ordering a P-part will get you the wrong item. Automotive Industry Overview

You’ve got a 511-page factory document that tells you exactly which part to order, how it interacts with other components, and whether you need to buy a whole assembly. That’s the difference between a day on the job and a day waiting for a return label. Access the Factory Manual and keep it next to your laptop in the shop. You’ll use it every time a customer brings in an EX100-2 with a leaking track motor or a cracked offset boom pivot.