Description

Hitachi Sumitomo ZX170W-3, ZX190W-3 2007 Workshop Manual

If you’ve ever wasted an afternoon chasing down a torque spec from a third-party reprint, you understand why this 604-page OEM manual earns its spot on the bench. Hitachi Sumitomo ZX170W-3, ZX190W-3 2007 Workshop Manual — factory issued, Part No. WCGB-E-00. Pulled from the original Hitachi Construction Machinery files, not scanned from a dog-eared copy. This is the same document that dealers used off the floor in 2007.

Tightening Torque Specifications – Where the Real Work Starts

Section 1, Group 2 of this manual is titled “Tightening Torque Specifications” and includes a full torque chart. Torque values for metric fasteners, piping joints, and periodic replacement parts. No guesswork. If your service manual doesn’t list the ft-lb for a M14 bolt in the swing motor mount, it’s useless. This one does. The torque chart is printed with the same specifications Hitachi sent to the assembly line. Get the right torque data from page W1-2-3 (the consecutive page numbering system is explained on page IN-01).

Pump Device: Disassembly and Assembly

Section 2, Group 4 covers the pump device from removal to full teardown. Steps for disassembly of the regulator, assembly of the regulator, and the structure of the pilot pump are included. You get the exact clearances and preload settings that keep the hydraulic system alive. Third-party manuals skip these details because they don’t have access to the factory drawings. This one doesn’t.

Control Valve: 4-Spool and 5-Spool Sides

Section 2, Group 5 goes deep into the control valve. Two separate disassembly procedures — one for the 4-spool side, one for the 5-spool side. Then you get assembly instructions for both. The positioning control valve is covered separately, with removal, disassembly, and assembly procedures. If you’ve ever rebuilt a spool valve with the wrong O-ring stack, you know why this level of detail matters. No generic “reassemble in reverse order” — each spring, shim, and seal has a specified orientation.

Swing Device and Swing Motor – Factory Procedure

Section 2, Group 6 covers the swing device and swing motor. Disassembly and assembly of both units, plus the structure of the swing dampener valve. The maintenance standard table lists wear limits and clearances. The swing brake valve also appears in Section 3, Group 2 under the travel motor — that section includes brake valve disassembly and assembly. You get the same procedures that Hitachi provides to their own service network. If you need to understand a Manual Transmission for the roadability of this wheeled excavator, that knowledge is separate, but the driveline is fully detailed in Group 4 and 5 of Section 3.

Brake Valve and Steering Valve – Safety Critical

Section 2, Groups 13 and 14 cover the steering valve and brake valve. Removal and installation for the steering valve; full disassembly and assembly for the brake valve. No shortcuts. Brake valve internal seals must be replaced with the correct tooling — the manual lists required tools. For the steering system, the signal control valve and shockless valves are also detailed (Groups 9 and 10). When you’re working on a machine that travels on public roads, the steering and brake specs are non-negotiable.

Source Authenticity: OEM vs. Aftermarket

Every page in this manual was produced by Hitachi Construction Machinery Co., Ltd., printed in Japan in August 2007. It’s not a composite of multiple sources. The introduction states the manual is written for an experienced technician, and it references three separate volumes — the Technical Manual (Operational Principle), Technical Manual (Troubleshooting), and this Workshop Manual. Aftermarket vendors can’t reproduce the piping joint torque standards or the swing dampener valve spring specifications because those are proprietary to Hitachi. What you get is the exact PDF that was distributed to dealer service departments. For related factory documentation, see Hitachi Sumitomo SH330 SH330LC 350HD-3B 2006 Workshop Manual – Factory Specs and Hitachi Sumitomo SCX1500-2, SCX1200-2 Workshop Manual.

Who Needs This Manual?

If you own a ZX170W-3 or ZX190W-3 and you’re doing anything beyond fluid changes, you need this. The manual covers everything from cab glass dimensions (Section 2, Group 1) to axle differential assembly (Section 3, Group 5). Hydraulic bleeding procedures are in Section 1, Group 4. Painting specs for touch-up are in Section 1, Group 3. The safety section at the front includes the safety alert symbol and weight warnings — don’t ignore that. This is written for the technician who knows the basics but needs the factory spec to complete the job correctly. Beginners should also have the separate Troubleshooting manual (TTCGB-E) and Operational Principle manual (TOCGB-E) on hand. Remember, the Workshop Manual is for maintenance and repair — not for diagnosing system failures.

Frequently Asked Questions

Does this manual include engine repair procedures?

No. The engine manual is a separate document referenced in the introduction. This workshop manual covers the hydraulic, structural, and driveline systems only.

What torque values are listed in the manual?

Section 1 Group 2 contains a complete torque chart with values for standard metric bolts, piping joints, and periodic replacement parts. Additional torque specifications appear throughout the assembly procedures — for example, the swing device assembly page calls out specific torque for mounting bolts. The chart uses ft-lb and Nm. If you need to torque a control valve spool end cap, the value is there. The manual also lists torque for piping joints with O-rings and flared fittings, which is critical for hydraulic leaks. The torque values are the same as those used on the Hitachi assembly line in 2007. Without this chart, you are guessing. With it, you have a number that was tested for that specific thread and material combination. That is the difference between a joint that holds and one that seeps after 50 hours.

Is this a reprint or a scan?

This is a direct OEM factory file — original PDF from Hitachi, not a reprint or a photocopy. The page numbering (e.g., W1-2-3) matches the official manual.

How many pages does the manual have?

604 pages. The PDF includes bookmarks for every section and group for easy navigation.

This is the manual you want on the bench when an axle seal is leaking or the pump regulator needs tuning. It’s the same document that factory-trained technicians used. Access the Factory Manual and keep it within arm’s reach — every torque spec, every shim thickness, every assembly step is there. No fluff, no missing pages, just the OEM data.

• Hitachi Sumitomo SCX1500-2, SCX1200-2 Workshop Manual – 506 Pages
• For general transmission theory, see Manual Transmission