Description

Hitachi Sumitomo 200-3, 210H-3, 210K-3, 210LCN-3, 240N-3 Workshop Manual

If you’ve ever rebuilt a hydraulic pump using a generic PDF from some forum, you know the cost of guessing. A misread torque spec on a swing motor bolt means a leak that takes half a shift to find. I’ve seen it. The Hitachi Sumitomo 200-3, 210H-3, 210K-3, 210LCN-3, 240N-3 Workshop Manual is the factory binder, not a reprint from a third party who never touched a wrench. 696 pages of the data Hitachi’s own techs use when they assemble and disassemble these machines.

Start with Section 1 — General. That’s where the torque tables live. You get separate tightening torque specifications for each class: ZX200-3, ZX225US-3, ZX240-3, ZX270-3. On page 73, the full torque chart covers bolt grades, piping joints, and periodic replacement parts. Do not mix classes. A 200-3 flange bolt is not the same as a 240-3. The manual gives you the exact foot-pounds for your machine.

Understanding the Hitachi Sumitomo 200-3, 210H-3, 210K-3, 210LCN-3, 240N-3 Workshop Manual

This is a workshop manual, not a service manual that glosses over procedures. It’s written for experienced technicians — but if you are a home garage enthusiast who follows torque specs to the letter, you can use it. Every section follows the same format: remove and install, then disassemble and assemble. The pump device section alone has eleven sub-sections: removal, disassembly, assembly, regulator, solenoid valve, pilot pump structure. No skipped steps.

Torque Specs by Class — Don’t Guess the Foot-Pounds

Hitachi divided the torque tables by machine class because the bolt sizes and materials change between models. The ZX200-3 class uses different values than the ZX225US-3 class. You get the chart for piping joints, which is critical for hydraulic leaks. Also see the “Periodic Replacement of Parts” table — it tells you when to replace O-rings and seals based on operating hours. Use it. I’ve seen shops skip that and pay for a blown swing motor seal.

Pump Device: Full Disassembly and Assembly Procedure

Section 2 covers the pump device for all models. The manual walks you through removing the pump from the main frame, then disassembling the regulator, the solenoid valve, and the pilot pump. The assembly procedure includes the order of tightening bolts and the correct torque. This is not a “remove in reverse” note — they give you the sequence. On page 113 you’ll find the assembly steps for the regulator with the correct shim thicknesses. Pay attention to the maintenance standard table: it lists wear limits for piston shoes and cylinder blocks.

Control Valve: 4-Spool and 5-Spool Sides

The control valve section is split into 4-spool and 5-spool sides. Each side has its own disassembly and assembly instructions. The manual includes removal and installation of the auxiliary control valve as an option. If you’re replacing a spool, the clearances are specified in the maintenance standard. Don’t rely on aftermarket documentation — it usually omits the internal clearances. This manual gives them for both main and auxiliary valves.

How to Bleed Air from the Hydraulic Oil Tank

This is a small but crucial procedure in Section 1. Bleeding air from the hydraulic oil tank prevents pump cavitation. The manual tells you the exact steps: loosen the air bleed plug, operate the engine at idle, watch for steady oil flow. Safety warning is included — keep hands away from moving parts. You won’t find this in a third-party manual because it’s considered basic. But if you drain and refill the tank, you need this procedure to avoid destroying the pump on startup.

Swing Device Maintenance Standards and Assembly

The swing device section covers removal and installation for ZX200-3, ZX240-3, and ZX270-3 classes. The disassembly of the swing motor includes two variants: one for the 200-3 through 240-3, and a different one for the 270-3. Each has its own torque sequence for the swash plate bolts. The maintenance standard table gives you the acceptable clearance for the swing parking brake switch valve. If you skip that, the brake may drag and overheat the motor.

Undercarriage: Travel Device Removal and Install

Section 3 covers the undercarriage — swing bearing and travel device. The travel device removal includes a weight list so you know how much the assembly weighs before you lift it. Disassembly and assembly procedures for the travel motor are detailed. Pay attention to the assembly order of the travel motor’s brake piston — the manual shows the correct orientation of the spring and plates.

Related manuals you may need for complete coverage:

• HITACHI 200-3 Series Hydraulic Excavator Technical Manual
• Hitachi ZAXIS 200-3 Series Troubleshooting Manual
• HITACHI ZAXIS 200-3 225US-3 240-3 270-3 Workshop Manual

This manual is not like a Manual Transmission repair book that relies on generic patterns. It’s specific to Hitachi’s hydraulic system. When I teach apprentices, I tell them to treat every bolt like it’s a Manual Transmission input shaft bolt — use the factory torque. That’s what this manual gives you: the factory data, no shortcuts, no omissions. Stop trusting forum uploads. Access the Factory Manual and put it on your tablet next to the machine.

Does this manual include the engine removal procedure?

Yes, Section 2 covers engine removal for all ZX200-3 class through ZX270-3 class models.

What torque specs are provided?

The manual includes dedicated tightening torque specification tables for each class: ZX200-3 class, ZX225US-3 class, ZX225USR-3 class, ZX240-3 class, and ZX270-3 class. These are not generic values — they come from Hitachi’s engineering. Additionally, there is a torque chart covering bolt grades, piping joint torques, and periodic replacement parts. Top priority: use the class-specific table, not the general chart, for critical fasteners like swing motor bolts and pump mounting bolts. On page 73 you’ll find the full torque chart, but the class-specific tables are on the preceding pages. Always verify you are applying the correct value for your machine serial number.