Description

Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog

If you are ordering parts for a Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 excavator and you are tired of cross-referencing aftermarket catalogs that show the wrong part number, this is the document you need. I have been wrenching on heavy equipment for 28 years, and I have seen more jobs held up by a wrong seal or a misidentified valve than by any mechanical failure. This Parts Catalog is the factory-issued book — 148 pages of exploded views, OEM part numbers, and interchange codes. It covers serial numbers from 020001 onward. You get the same information the dealer parts counter uses.

148 Pages of Factory Part Data

Every page in this catalog is laid out the way Hitachi intended. The table of contents breaks down into five major sections: PUMP, MOTOR, VALVE, CYLINDER, and PARTS INDEX. Under VALVE alone, you get 14 subsections — CONTROL (1/4 through 4/4), PILOT (FRONT, SWING), PILOT (TRAVEL), FC, SHUTTLE (1/5 through 5/5), SOLENOID, CHECK, RELIEF, LOCK, plus the OIL FILTER and JOINT CENTER. That level of detail means you can find the exact shuttle valve or relief valve without flipping through generic diagrams. Need a part number for the boom cylinder seal kit? Go to CYL.; BOOM (R) or CYL.; BOOM (L). The parts index at the back lets you search by part number if you have a scrap tag.

Valve Section: What You Actually Need

The valve section alone is worth the price of this catalog. You get control valve breakdowns in four separate pages because the spool configurations change between the 850-3 and the 870H-3. The shuttle valve section runs five pages — SHUTTLE (1/5) through SHUTTLE (5/5) — because these machines use multiple shuttle valves in the pilot circuit. If you have ever had a machine that drifts or fails to swing properly, you know how critical those little valves are. The catalog shows you the exact part number for each shuttle, the o-ring sizes, and the spring specifications. No guessing which valve goes where.

Does This Catalog Cover the Pump and Motor Assemblies?

Yes. The PUMP section includes PUMP DEVICE, PUMP ; MISSION, PUMP ; PISTON, PUMP ; REGULATOR, PUMP ; GEAR, and PUMP ; PISTON (FAN DRIVE) with its own regulator. The MOTOR section covers SWING DEVICE, MOTOR ; OIL (SWING), T. MISSION (SWING), TRAVEL DEVICE, MOTOR ; OIL (1/2), MOTOR ; OIL (2/2), and MOTOR ; OIL (FAN DRIVE). Each subsection gives you an exploded view with callouts. You get the part number for the piston shoe, the swash plate, the regulator spring — everything down to the last snap ring. If you are rebuilding a travel motor, you need the MOTOR ; OIL (1/2) and (2/2) pages to see the internal seal arrangement.

Source Validity: OEM vs Aftermarket

This is a genuine Hitachi factory document, not a third-party compilation. The original file name — HITACHI_850-3-850LC-3-870H-3-870LCH-3_Parts_Catalog_ja-en-27514020637.pdf — confirms it came from Hitachi’s own distribution. The catalog includes the Japanese and English text side by side, with the same interchange codes (Y, I, P, D, H, F) that the dealer system uses. Aftermarket catalogs often skip the interchange notes, which means you might order a part that supersedes to a different number. This catalog shows you the supersession chain. If you want to see how the OEM documentation compares to aftermarket options, check out the Automotive Industry Overview for context on why factory data matters.

For related service information, the Hitachi ZAXIS 850-3 870H-3 2006 Technical Manual – Section: Workshop Manual gives you the disassembly and assembly procedures that pair with this parts catalog. If you are diagnosing a problem, the Hitachi ZAXIS 850-3 850LC-3 870H-3 870LCH-3 Troubleshooting manual walks you through hydraulic and electrical fault finding. For daily operation, the Hitachi 850-3 2006 Operator’s Manual covers controls and maintenance intervals.

FAQ

Does this catalog include torque specifications for the valve body bolts?

No. This is a parts catalog, not a service manual. It lists part numbers and quantities. Torque specs are in the workshop manual.

Can I use this catalog to order parts for a 870LCH-3 with a different serial number range?

This catalog covers serial numbers 020001 and up. If your machine is older than that, some parts may have been superseded. The interchange codes (Y, I, P) in the catalog tell you if a part is a direct replacement or if you need to order the superseded number. For machines below 020001, you should verify with a dealer before ordering.

What is the difference between the SHUTTLE (1/5) and SHUTTLE (2/5) sections?

Each shuttle valve subsection covers a different location in the pilot circuit. SHUTTLE (1/5) typically covers the swing brake release circuit, while SHUTTLE (2/5) covers the travel pilot circuit. The exploded view shows the port orientation and the spring length, which is critical because installing the wrong shuttle can cause the machine to fail to release the brake. The catalog gives you the part number for each specific shuttle assembly, including the o-ring kit.

Is the parts index searchable in the PDF?

Yes. The PDF includes a bookmarked table of contents and a text-based parts index. You can search by part number or by description. The index lists every part number from the catalog with the page reference. If you have a part number from an old machine, you can look it up in the index and see if it still applies to the 850-3 series.

You have the machine. You have the serial number. Now get the right parts the first time. Access the Factory Manual and keep this catalog on your tablet or printed out in the shop. It will save you the headache of ordering a valve that does not fit.