Description

Hitachi Sumitomo ZAXIS 135US, ZAXIS 135US-E, ZAXIS 135USK Parts Catalog

Mike Callahan here. I’ve spent twenty-eight years wrenching on everything from compact excavators to heavy iron. The one thing I’ve seen eat up shop hours is ordering the wrong part because someone used a generic diagram. This Hitachi Sumitomo ZAXIS 135US, ZAXIS 135US-E, ZAXIS 135USK Parts Catalog is 602 pages of factory–original part numbers and exploded views. No third-party redraws. No guesswork on which thread pitch or gasket thickness matches your serial number. If you are rebuilding an upperstructure, replacing an engine mount, or tracking down that elusive fuel feed pump, this catalog puts the right number in your hand.

Engine and Fuel Sections: Real Part Numbers for Real Machines

Pop open the catalog and you land on the ENGINE section. It covers the Isuzu CC-4BG1T power plant used across the ZAXIS 135US, 135US-E, and 135USK. Inside you get diagrams for the engine support brackets, oil filter piping, intercooler piping, and radiator assemblies. The Fuel section breaks down the fuel tank, support brackets, fuel piping, feed pump, and the double filter assembly. Every item has a Hitachi Sumitomo part number, quantity per machine, and the specific model variant it fits. Need a fuel line for a 135US-E? The catalog uses markers so you know exactly which page to flip to. No fuzzy photocopies.

Upperstructure Breakdown: Frame, Counterweights, and Control Assemblies

Start a full upperstructure teardown and you need the FRAME section plus CENTER JOINT SUPPORT. The catalog shows the boom foot pin and separate listings for counterweights—one for <135, E> and another for . Additional counterweight (0.8t) is also listed. Further down you get the pump device and swing device with their supports. Each solenoid valve, control lever, and pilot pipe run (A through J) has its own grouping. That means when a technician calls you saying “the pilot piping kit for the right console is missing a fitting,” you can pull up the PILOT PIPING (D-1) or (D-2) page and spot the exact banjo bolt or union. The manual does not leave you guessing which hose goes where.

Why OEM Parts Catalogs Beat Aftermarket Diagrams

Aftermarket documentation is a gamble. I have seen reprinted catalogs that swap model years or skip regional variants like [NA] for North America or [EU] for Europe. This manual is a direct Hitachi Sumitomo print. It includes the original Japanese and English text—no translation errors. The SERVICE CODE column tells you if a part is orderable as a service kit (K), if it requires on-site modification (W), or if it is oversize/undersize (OS/US). The interchangeability codes (Y, I, T, P) show whether a newer part supersedes the old one. That level of detail keeps you from bolting on a part that will fail in 50 hours. If you want to understand the broader context of why these standards matter, check out the Automotive Industry Overview on Wikipedia.

602 Pages: A Real Reference Tool for the Bench

Six hundred and two pages. That is not a PDF you skim once. This catalog sits on the workbench next to the laptop. You flip to the ELECTRIC PARTS sections (A through G) for the wiring harness, fuse box, and boom light circuits. The CAB group runs over a dozen subsections covering glass, seat variants (cloth, vinyl, suspension, with/without heater), and floor plates. Each part number ties back to a specific model code. If your machine has the auto engine control option, the catalog splits the switch box and motor assemblies between <135, K> and variants. No room for ambiguity.

Audience: Who Should Buy This?

If you own a Hitachi Sumitomo ZAXIS 135US, 135US-E, or 135USK excavator and you order your own parts, this catalog pays for itself the first time you avoid a wrong part return. Shop owners managing a fleet can hand a tech the manual and say “look it up yourself.” Home garage enthusiasts who maintain a compact excavator on a farm or ranch will appreciate seeing every nut and o-ring called out. Beginners need to know: this is not a repair manual. It does not show you how to remove the engine or torque the head bolts. It is a parts identification tool. Pair it with the HITACHI ZAXIS 135US Parts Catalog service manual for complete rebuild procedures. Also check the Hitachi Sumitomo ZAXIS 135US, 135USK, 225USR, 225US, 125US 2006 User Manual and the Hitachi Sumitomo ZAXIS850-3 Series Parts Catalog – 451 Pages for larger machines in the lineup.

Can I use this catalog for both the ZAXIS 135US and the 135USK models?

Yes. The catalog uses <135>, , markers to indicate which parts apply to each model.

Does the manual include torque specs or removal procedures?

No. This is a parts catalog, not a service manual. It lists part numbers, quantities, and interchangeability codes only. For example, if you need to replace the engine oil filter, the catalog shows the part number and filter kit (HIGH PERFORMANCE FILTER KIT), but does not include oil capacity or torque specs. You will need the official Hitachi Sumitomo service manual for those values. The advantage of this catalog is that you can confirm the exact part before you order, which keeps the job moving. I’ve seen guys order a radiator for the 135US-E only to find it uses a different shroud than the 135US—this catalog catches that discrepancy before the part arrives.

Bottom line: if you are tired of cross-referencing aftermarket catalogs that miss the variant differences, grab this OEM Hitachi Sumitomo Parts Catalog. Access the Factory Manual and start ordering parts with confidence—the same confidence that comes from having the actual factory document on your screen.