Description

Hitachi Sumitomo 330-3, 330LC-3, 350H-3, 350LC-3, 350LCN-3 Parts Catalog

Ordering parts for a 330-3 or any of its variants without the factory interchange data is the fastest way to get the wrong seal kit or a track roller that doesn’t match your undercarriage. I’ve seen guys slap on a bracket from a 350LC-3 onto a 350H-3 boom and then wonder why the pin holes don’t line up. This Hitachi Sumitomo 330-3, 330LC-3, 350H-3, 350LC-3, 350LCN-3 Parts Catalog is what Hitachi ships to their own dealer network. 369 pages, OEM print, no aftermarket guesswork. If you want to know exactly which part number goes on your machine, this is the document.

Hitachi Sumitomo built these excavators with regional variations – North America, Europe, Asia – and the difference between a 350LC-3 and a 350LCN-3 can be as specific as the track link gauge. The catalog marks each model with codes like <330>, , , <350> alongside region tags [EU] and [NA]. Page 2 shows the memorandum table where you record your machine’s PIN and engine serial number — fill that out before you touch anything. For the interchangeability symbols, you need to look at page 3. They use Y for unconditional compatibility, I for one-way substitution, P for prohibited parts. I’ve had to explain to a green tech that an I marker means you can use the replacement part in place of the original, but not the other way around. That kind of detail keeps you from ordering a control valve that won’t bolt to your existing pump device.

Interchangeability Codes: What Y, I, P, D Mean on the Page

Page 3 lays out the symbol legend. Y means parts are fully interchangeable. I means the alternate part can replace the original but not vice versa. P means the listed part is banned – use the alternate. D indicates a changeover date, e.g., D03/09 means use the new part from September 2003 onward. R marks shims that vary per machine serial number. If you don’t read these codes, you’ll order a counterweight that doesn’t match your machine’s production run. This catalog also uses H for precision parts that require dealer repair, K for service kit items, and Z for engine-related parts. Engine components are not listed here – you need the separate engine catalog. The Automotive Industry Overview doesn’t cover excavators, but the same principle applies: OEM documentation is the only reliable source.

Upperstructure Chapter: Engine, Pump, and Control Valve Sections

The Upperstructure section runs from the frame through the cab. You get exploded views for the engine support, oil filter piping, intercooler piping, radiator, and reserve tank. Need the boom foot pin? Look under FRAME. Swing device support, pump device, main piping splits into four sub-sections (MAIN PIPING 1 through 4). The control lever assemblies are divided by region – single switch for EU/NA, triple switch for EU/NA. If you’re working on a 330LC-3 with North American spec, you need the [NA] variant of the console cover. The electric parts section has six sub‑groups (A through E plus E for HTC). There’s also a dedicated section for the GPS parts and the engine control unit. Missing a fuse? FUSE is listed under UPPERSTRUCTURE. Every bracket, hose clamp, and solenoid valve has its own exploded diagram with callouts.

Undercarriage Parts: Track Frames, Rollers, and Center Joint

Track frame, track guard, full-length guard for STD and LC models. Step, track under cover, swing bearing parts. Travel device and support. Front idler and adjuster assembly. Upper roller, lower roller for STD and LC. Track link assemblies – separate pages for STD, LC, and LCN [EU]. If you’ve got a 350LCN-3, the track link page with the [LCN][EU] tag is your reference. Center joint support and travel piping split between STD and LC models. Travel motor cover is its own section. This catalog doesn’t leave out a single bolt in the undercarriage. You can identify the correct lower roller part number by checking the machine’s serial number range and the LC marking.

Front-End Attachments: Mono Boom, Arms, and Linkage

Standard boom, H boom for the 350H-3. Arms: 2.67m, 3.20m, 4.00m, plus an H arm at 3.20m. A link with or without a hook. B link in H type and K type. Front piping for mono boom. The LU section likely covers lubrication points. If you need to replace an A link pin, you’ll find the part number and quantity per machine. The catalog also lists optional items marked OP – optional parts not included on standard machines. For example, the rotating beacon parts and rear camera are in the upperstructure electrics section but may be OP on some models.

FAQ – Two Quick Questions

Does this parts catalog include torque specs or repair steps?

No. This is a parts identification catalog only. For disassembly and torque values, you need the Hitachi Zaxis 330-3 350-3 Series Technical Manual and the HITACHI ZAXIS 330-3 350-3 Workshop Manual.

How do I know which part number applies to my 350LC-3 with serial number 050001?

The catalog uses a model indicator system at the top of each page. For the 350LC-3, look for <350> in the header. If your machine was built for Europe, you’ll see [EU] next to certain groups. The memorandum on page 2 asks you to record your Product Identification Number and engine type (AH-6HK1XYSA). Always cross-reference the serial number range printed on the page headers – the catalog applies to serials 050001 and up. When you find a part with a D marker (e.g., D03/09), that part superseded an earlier version after September 2003. If your machine is older, you may need to check the interchange column. For detailed troubleshooting procedures, refer to the Hitachi ZAXIS 330-3 350-3 Series Troubleshooting Manual. The Automotive Industry Overview is not directly relevant, but the concept of using factory data applies universally – never trust aftermarket reprints for hydraulic excavator parts identification.

If you are tired of paying dealer markups on parts you could have ordered yourself with the correct numbers, stop guessing. This factory document is the same one Hitachi dealers use. Access the Factory Manual and keep it in your laptop case next to the coffee-stained wiring diagram. Your undercarriage will thank you.