Description

Hitachi Sumitomo EX33Mu, 58Mu Technical Manual

I’ve been turning wrenches for 28 years. When a machine like the Hitachi Sumitomo EX33Mu, 58Mu Technical Manual comes across my bay, I reach for the factory manual. Not a reprint, not a third-party copy. The original OEM. This 789‑page document is what you need to keep those excavators digging without burning billable hours on guesswork.

On page 1, the manual opens with the machine identification and model breakdown. On page 3, you’ll find the units conversion table – critical when your torque wrench reads in lb‑ft but the spec is in Nm. That’s the kind of detail that saves a blown seal or a stripped bolt.

789 Pages of Factory Specs – What You Get

This isn’t a condensed overview. It’s the full Technical Manual paired with a Workshop Manual. You get the upperstructure section covering the pump device, swing reduction gear, brake valve, and parking brake. The control valve section details the flow combiner valve, main relief valve, overload relief valve, and make‑up valve. Every valve clearance spec is there – the engine section alone lists valve clearance, injection timing, and compression pressure. The hydraulic system section gives you the outline and operation of the main pump and swing motor.

Engine and Brake Valve Coverage – No Guesswork

The engine test procedure on the operational performance test section tells you exactly how to check engine speed, compression pressure, valve clearance, and fuel injection nozzles. The brake valve section inside the swing device – that’s where you get the parking brake and swing motor relief valve pressures. You want the swing motor leakage test? It’s in there. The travel brake valve and counterbalance valve are covered in the undercarriage section. If you’re swapping a travel motor or adjusting the swash angle, you need the specs from this manual.

Does This Manual Cover the Electrical System?

Yes, and it does it right. Section 4 is the electrical system – includes the auto boom‑stop system, height restriction system, and initial setting procedures. The troubleshooting chapter has fault code lists, monitoring item lists, and system operation status. It walks you through voltage checks and continuity checks without jumping around. If the monitor panel shows a malfunction of the coolant temperature gauge or the alternator indicator, the flow chart will get you to the root cause. This is how you avoid replacing good parts.

3 Critical Sections for the Shop Floor

Section 6 – Operational Performance Test. This is the one that separates competent shops from the rest. You get travel speed test, track revolution speed, mistrack check, swing speed, drift checks, and cylinder cycle times. The performance standard table gives you pass/fail numbers.

Section 7 – Troubleshooting. Over 30 pages of diagnostic flow charts. Engine control system, monitor system, auto boom‑stop function, and machine operation system. If the starter doesn’t rotate, the manual tells you where to check battery voltage first.

Workshop Manual Section – Tightening Torque Specifications. The torque chart and piping joint torque specs are all there. You can stop guessing whether a bolt needs 50 or 70 ft‑lb. The manual gives you the number.

Why OEM Documentation Matters

I’ve seen aftermarket manuals that list the wrong main relief valve pressure or skip the brake valve disassembly precautions. This is the original Hitachi Sumitomo release. The component interchangeability list tells you which parts swap between the EX33Mu and 58Mu. The electrical part layout maps every connector. You get the factory hydraulic circuit diagrams for both models. That’s something a third‑party reprint will never have.

If you’re working on a Hitachi Sumitomo 330LC, 350H, 350LCH, 370MTH, ZX330 Technical Manual or a Hitachi Sumitomo SH200-3 SH220-3 Technical Manual 166 Pages, you’ll find the same level of detail. For the SH240‑5, check out the Hitachi Sumitomo SH240-5 Technical Manual – Factory OEM Specs. All factory prints, no shortcuts.

Understanding the travel reduction gears is like reading about a Manual Transmission – you need the gear ratios and clutch pack specs. This manual gives them.

Period. That’s the level of detail you’re buying.

Does this manual include torque specifications for the swing motor?

Yes. The swing motor relief valve pressure setting is in the Component Test subsection of Section 6. The tightening torque specs for the swing reduction gear are in the Workshop Manual torque chart.

How many pages is the manual?

789 pages. You get both the Technical Manual and the Workshop Manual bound together.

Is this the official factory manual from Hitachi Sumitomo?

Yes. This is the original OEM document. No reprints, no copy‑paste jobs. The ISBN block and the page numbering (T 01‑03‑xx) match the factory release.

Does it cover the auto boom‑stop system and the height restriction system?

Yes. Section 4 has the control system outline, the auto boom‑stop system initial setting procedure, and the height restriction system. Section 7 has detailed troubleshooting flow charts for the angle sensor system and the pilot control shut‑off lever circuit. If you need to understand how the Manual Transmission of the travel motor works, the manual covers the swash angle control and counterbalance valve as well.

You want to fix these excavators right the first time. Don’t waste time on generic PDFs. Access the Factory Manual now and get the exact specs the dealer uses.