Hitachi Sumitomo ZX210LC-3, ZX210LCN-3 Technical Manual – 14-Page Factory Specs

Description

You’ve got a ZX210LC-3 on the lift. The implement circuit is weak. You think it’s the relief valve, but you don’t have the factory setting. You could guess, but that’s how you end up with a blown hose and a pissed-off customer. That’s why you need the Hitachi Sumitomo ZX210LC-3, ZX210LCN-3 Technical Manual. 14 pages of factory data straight from Hitachi Construction Machinery. No aftermarket abbreviations, no translated guesses. Just the numbers Hitachi stamped on the prints.

Engine Specs: Isuzu AI-4HK1X

Page 1 of the manual spells out the engine data you’d check before any teardown. Isuzu AI-4HK1X, 4-cylinder, 4-cycle water-cooled direct injection, turbocharged and intercooled. Rated power 122 kW (164 HP) at 2000 rpm – ISO 9249 and SAE J1349 net readings are identical. Maximum torque is 655 N·m at 1500 rpm. Bore and stroke 115 mm x 125 mm, piston displacement 5.193 L. Batteries: two 12V / 88 Ah. That’s the info you need when ordering a rebuild kit or diagnosing a power loss.

What Relief Valve Settings Are Listed?

Page 2 carries the hydraulic system numbers that matter on the workbench. Implement circuit relief: 34.3 MPa (350 kgf/cm²). Swing and travel circuits match that same 34.3 MPa. Pilot circuit is 3.9 MPa (40 kgf/cm²). Power boost bumps to 36.3 MPa (370 kgf/cm²). Main pumps are two variable displacement axial piston pumps pushing a maximum oil flow of 2 x 212 L/min. Pilot pump is a gear pump at 30 L/min. If you’re chasing a weak swing or slow travel, those are the targets you set your gauge against.

3 Critical Hydraulic System Numbers

First: the main pump flow – if you’re not getting 212 L/min from each pump, you’ve got a pump or regulator issue. Second: the power boost pressure – only engage when the manual says. Third: the filter specs. The manual notes a suction filter in the suction line, full-flow filters in the return line and in the swing/travel motor drain lines. Ignoring those filter positions causes cavitation and seal failure. Seen it too many times.

Check the Attachment Fit Before You Start

This technical manual covers the Super Long Front attachment for the ZX210LC-3 and ZX210LCN-3. It also includes specs for ZX250, ZX280, ZX350, and ZX470 models in the same family. If you’re swapping a long front onto a standard chassis, you need the operating weight and engine power data to confirm the hydraulic balance. Operating weight for the ZX210LC-3 runs 21,500 to 22,300 kg. Don’t assume a bucket from a 280 fits – page 1 gives the model code breakdown. Use it.

OEM vs Aftermarket: Why It Matters

Aftermarket manuals often round pressures or miss the power boost setting entirely. This is a direct scan of the Hitachi Sumitomo factory document. The relief valve numbers on page 2 are exact to the MPa. The engine specs came from Hitachi’s engineering release. I’ve seen a $4,000 hydraulic pump killed by a generic manual that told a guy to set the relief at 32 MPa instead of 34.3. That difference doesn’t show on a tired gauge, but it shows on the repair bill.

Who Needs This Manual?

If you’re a home-garage mechanic pulling a ZX210LC-3 pump, or a shop owner verifying a tech’s work, these 14 pages save you the phone call to the dealer. The manual doesn’t have every wiring diagram – it’s a technical spec supplement. But for engine and hydraulic baseline numbers, it’s the only document you should trust. Pair it with the full service manual for complete diagnostics. Related products: Hitachi Sumitomo 330LC, 350H, 350LCH, 370MTH, ZX330 Technical Manual or Hitachi Sumitomo SH200-3 SH220-3 Technical Manual 166 Pages if you work on those platforms. And if you need a manual transmission reference for other equipment, see Manual Transmission and Manual Transmission for general background.

How many pages does this manual have?

14 pages.

Does this technical manual include wiring diagrams or full service procedures?

No, this is a technical specs manual covering engine data (Isuzu AI-4HK1X, bore, stroke, torque), hydraulic system relief settings (implement, swing, travel, pilot, power boost), pump flow rates, and Super Long Front attachment specifications for the ZX210LC-3 and ZX210LCN-3. It’s 14 pages of factory reference data. For full service procedures and electrical wiring, you need the factory service manual. Use this alongside the service manual to avoid guesswork on pressures and capacities.

Stop guessing. Access the Factory Manual from AutoRepairManuals and get the specs that keep your jobs on schedule. For the ZX210LC-3 and ZX210LCN-3, the Hitachi Sumitomo SH240-5 Technical Manual – Factory OEM Specs is also available if you work on that model.