Fiat Hitachi EX50UR EX700 1993 Service Manual – 332 Pages

Description

Fiat Hitachi EX50UR, EX700 1993 Service Manual – if you have ever rebuilt an undercarriage using a copy of a copy from some forum, you already know the cost of guessing. I have seen guys install a master pin with the wrong clearance because they trusted a third-party data sheet. That pin sheared inside a week. This is the actual binder Hitachi sent to dealer techs in 1993. It is 332 pages of what the factory expects you to know before you touch the machine.

Section 01 alone gives you the serial number locations, dimensions for crawler and wheel configurations, noise levels, and the exact antifreeze mixing ratio table. Page 5 has the conversion table – every torque value in the book is in kgf·m, and you will also get N·m and lbf·ft references. I have worked on EX series machines that came in with aftermarket manuals that listed swing bearing play as “replace if loose.” This book gives you a number. You measure it, you decide. That is what a real service data book does.

Fiat Hitachi EX50UR, EX700 1993 Service Manual: What’s Inside

Five sections split by machine system. Section 02 covers upperstructure: engine specs, radiator and oil cooler capacities, pump device, control valve, swing device, and the steering valve that only applies to wheel-type excavators. If you are swapping a swing motor on an EX50UR, the component spec table gives you the motor displacement and relief pressure. Do not start that job without this page.

Section 03 goes through the undercarriage with maintenance standards for sprockets, idlers, upper and lower rollers, links, master pins, track pins, bushings, and shoes. There is a table of wear limits for each part – for example, the front idler (1) and (2) have separate measurements because of design changes. You need the right specification for your serial number range.

Safety Section: 31 Warnings You Cannot Skip

The safety chapter runs from “Follow Safe Procedures” through “Live With Safety” – there are 31 individual bulletins. I have seen what happens when a tech skips the line about supporting the machine properly. This manual tells you where to put the jack stands and what capacity they need to be. It also covers battery explosion prevention, acid burns, high-pressure fluid injection risks, and the procedure for removing paint before welding or heating. Do not assume you know all of these. Read them.

Does the Manual Cover Both EX50UR and EX700?

Yes. The title block says EX50UR-EX700, and the Service Data Book covers the entire EX Series 1 from 50 to 700 class. If you are working on a wheel-type backhoe versus a crawler-type, the dimension and weight tables in Group 02 separate the two. Fuel and lubricant recommendations also split by crawler and wheel. You get filter element part numbers for both.

For the home garage guy rebuilding a retired EX50UR: you are going to need the pin and bushing wear standards from Section 04. The backhoe attachment component specs include boom, arm, bucket, and offset cylinder dimensions. Want to know the maximum pin clearance before bushing replacement? It is in the maintenance standards table. Do not guess.

7 Systems of Component Specifications

Section 02 lists seven main component groups: engine, radiator/oil cooler, pump device, control valve, swing device, steering valve (wheel only), and starter/generator. Each group gives you the factory torque values, pressures, flow rates, and adjustment points. For the pump device, you get the displacement per revolution in both cm³/rev and in³/rev – see the conversion table on page 5 if you need to switch units. I have used these numbers to set pump flow on an EX700 that had been rebuilt with the wrong relief setting. The manual fixed it in fifteen minutes.

Source Validity: This Is the Factory Data Book, Not a Reprint

Aftermarket manuals for Hitachi excavators often delete the confidential notice, skip the revision tracking, and leave out the serial-number-specific tables. This PDF came from the original Hitachi Construction Machinery Co., Ltd. publication (KH-070-00, 1993). The page numbering system is factory-original: section number plus consecutive page number (example 01-05). If you have dealt with a reprint that missed a page, you know why this matters. Every torque value in this book came from the same engineering department that designed the machine. If you want another factory-level reference for a different model, check the Fiat Hitachi SH330 Service Manual – OEM Factory Specs for SH330-5, SH350HD-5″>Fiat Hitachi SH330 Service Manual – same standard.

Related manuals on the EX series: HITACHI ZX140W/170W/190W/210W-3 Sales Manual”>HITACHI ZX140W/170W/190W/210W-3 Sales Manual and Hitachi 4JJ1 Engine Service Manual – Section: Engine Manual (1/2)”>Hitachi 4JJ1 Engine Service Manual. For transmission-related service, see Manual Transmission”>this external guide on manual transmissions or Manual Transmission”>another reference on manual transmissions – though keep in mind those are not OEM excavation specs.

Get the Right Torque Data Before You Turn a Bolt

Section 05 (Operational Performance Standards) includes engine speed, compression pressure, travel speed, swing speed, swing motor leakage, and hydraulic cylinder cycle time. For the swing function drift check, the manual gives you the allowable drift in degrees per minute. Do not rely on a video from someone who tightened a swing motor to “feel.” Use the book.

FAQ

Does the manual include wiring diagrams?

Not in the sense of a full electrical schematic. Section 02 gives component specs for the starter, generator, battery, relays, and switches (EX-1 and EX-2), but there is no fold-out wiring diagram. You will need a separate service manual for that.

What torque spec is given for the track shoe bolts?

Look under Section 03, Group 03 Maintenance Standards for grouser shoe and flat shoe. The manual specifies tightening torque in kgf·m. Use the conversion table in the introduction.

Can I use this for an EX400?

No. This data book covers EX50UR through EX700. The EX400 is not in the serial number range. You need the specific book for that model.

Is this the complete service manual or just a data book?

It is the Service Data Book – a supplement to the full service manual. It gives you specifications, maintenance standards, and performance standards. It does NOT contain step-by-step disassembly procedures. You will still need the service manual for overhaul instructions.

If you maintain or rebuild an EX50UR or EX700 excavator, do it with the document the factory uses. Access the Factory Manual now from AutoRepairManuals.