Description

Fiat-hitachi ZX450, ZX450LC, ZX450H, ZX450LCH, ZX460LCH Parts Catalog

If you are ordering parts for a ZX450 or any of its variants — ZX450LC, ZX450H, ZX450LCH, ZX460LCH — and you are tired of cross-referencing aftermarket catalogs that show the wrong piston seal or a control valve diagram that does not match what is bolted to your machine, this is the document that fixes that. 264 pages of factory-original part numbers, exploded views, and interchange codes. No reprints. No third-party redraws. This is the same PDF the dealer uses when you call in with a serial number.

264 Pages of OEM Part Numbers

Every page in this Fiat-hitachi ZX450, ZX450LC, ZX450H, ZX450LCH, ZX460LCH Parts Catalog comes from Hitachi’s own engineering files. The table of contents breaks down into five major sections: PUMP, MOTOR, VALVE, CYLINDER, and a PARTS INDEX. Under VALVE alone you get control valve spreads split across five sheets per model group, plus pilot valves, shuttle valves, solenoid valves, check valves, lock valves, and holding valves for boom and arm circuits. Need the part number for a holding valve on the arm rod side? That is in the VALVE ; HOLDING (ARM : ROD) subsection. The catalog does not guess — it gives you the exact Hitachi part number and the quantity per assembly.

Valve Section: Control, Pilot, Shuttle, Solenoid

The VALVE section runs longer than any other chapter because that is where the complexity lives. Control valve groups are shown in five-part spreads for the standard models and a separate five-part spread for the <450,H,MT,MTH> group. Pilot valves are broken out by function: front/swing, travel, breaker, and a general pilot valve page. Shuttle valves get five sheets, then another five for the alternate group. Solenoid valves have a dedicated page for the ZX460LCH models. If you have ever ordered a solenoid and received the wrong coil resistance because the aftermarket catalog lumped all Zaxis models together, you understand why this level of separation matters. The catalog also includes FC valves and check valves — every hydraulic control component is listed with its OEM number.

Pump and Motor Coverage

Pump section starts with the piston pump, then the regulator, the tilting-probing unit, and the gear pump. Motor section covers the swing motor and the travel motors — each travel motor gets two sheets (1/2 and 2/2) because the internal parts differ between the left and right sides on some serial breaks. If you are rebuilding a travel motor and need the correct thrust plate or brake piston, the exploded view on the motor pages shows every shim and seal. The catalog uses service codes — W, D, K, R, S, OP, OS, US — to tell you whether a part is field-replaceable or requires a dealer tool. Page 5 of the PDF explains every code in plain language. Do not skip that page.

Cylinder Breakdown: Backhoe and Loader Attachments

CYLINDER section covers boom cylinders (right and left) for the backhoe configuration, arm cylinders for standard and H-boom, bucket cylinders for standard arm and long arm, and a full set of loader cylinders if your machine is equipped with the loader attachment. Each cylinder listing includes the rod seal kit part number and the piston ring set. If you are swapping a bucket cylinder on a ZX450H with a long arm, the catalog marks that variant with <450,H,MT,MTH> so you order the correct seal kit. The parts index at the back lets you look up any part number alphabetically — useful when you have a bin of old parts and need to identify what they fit.

Who Needs This Catalog

Shop owners who stock parts for a mixed fleet of Zaxis 450-series machines. Mechanics who rebuild pumps and control valves in-house. Equipment dealers who need to verify supersessions before ordering. If you are a home-garage guy who bought a used ZX450LC at auction and want to fix the hydraulics yourself, this catalog saves you the trip to the dealer parts counter. Pair it with the service manual for torque specs and clearances — the parts catalog gives you the numbers, the service manual gives you the procedure. Related manuals you might need: Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 Parts Catalog for larger machines, or Fiat-hitachi ZX50U-2 Parts Catalog – 120 Pages of OEM Specs for compact excavators. For the ZX500LC series, see Hitachi ZX500LC ZX500LCH Parts Catalog.

Source Authenticity: OEM vs Aftermarket

Aftermarket parts catalogs for the Zaxis 450 series often combine multiple model years into one drawing, which means you get a part number that fits nothing. This catalog is the original Hitachi publication — serial number range 010001 and up. The interchange codes (Y, I, T, P) tell you exactly which parts supersede and which do not. If the compatibility column shows “P”, the part is prohibited and you must use the alternate part listed. Aftermarket catalogs omit those codes. That is how you end up ordering a shuttle valve that locks your hydraulics. For background on how hydraulic systems evolved in construction equipment, see Automotive Industry Overview. For the basics of diesel engine integration, Internal Combustion Engine provides context.

Does this catalog include torque specs or repair procedures?

No. This is a parts catalog — exploded diagrams, part numbers, quantities, and interchange codes. You need the service manual for torque values and disassembly steps.

Will this catalog work for a ZX480MT or ZX480MTH?

The cover lists ZX480MT and ZX480MTH in the title block, and several sections include <450,H,MT,MTH> tags. However, the primary focus is the 450/460 series. If you have a 480MT, check the control valve and cylinder sections for the MT tag — most hydraulic components are shared, but the boom cylinders differ. Verify your serial number against the catalog’s serial range before ordering parts.

You have the serial number stamped on the machine frame. Open this PDF, find your model in the table of contents, and pull the exact part number for that control valve spool or pump piston. No cross-referencing three different websites. No guessing whether the aftermarket drawing is correct. Access the Factory Manual and get the right part the first time.