Description

Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 2006 Operators Manual

If you’re wrenching on a Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 2006 Operators Manual machine without the factory book, you’re asking for trouble. I’ve seen guys guess torque values on a swing motor mount and end up with a cracked housing. This is a 366-page OEM document—not some aftermarket reprint with missing pages. It tells you exactly what Hitachi wrote for the 850-3, 850LC-3, 870H-3, and 870LCH-3. Every spec comes straight from the plant in Japan. No translations lost, no greasy fingerprints on the numbers.

Safety Warnings You Cannot Skip

Page 2 of this manual starts with an introduction that spells out the consequences of ignoring safety procedures. “Failure to do so could result in personal injury or machine damage.” That’s not lawyer talk; that’s a fact. The manual requires only qualified, licensed operators to run these machines. It also warns that modifying fuel delivery or overpowering the equipment voids the warranty. If you’re a DIY operator, read that section twice before you even sit in the cab. The book is printed on recycled paper, but the warnings are solid steel.

What the 366 Pages Cover?

From the machine numbers section on page 1 to the final service intervals, this operators manual breaks down every routine you need. You get the serial number locations, daily inspection points, fluid capacities, and travel/operation procedures. Because this is an operator-level manual, it focuses on safe running and basic maintenance—not engine rebuilds. But for the guy running his own excavation business, knowing the correct way to start the engine and check the hydraulic oil level means fewer breakdowns and shorter days.

Machine Numbers: Why They Matter

On page 1, the manual provides blank spaces to record the serial numbers of the machine and its hydraulic components. Hitachi tells you to fill these in and keep a copy off the machine. Why? Because when you call your dealer for parts or warranty work, they need those numbers. I’ve seen mechanics order the wrong hydraulic pump because they didn’t check the serial plate. This one page saves you that headache. It’s the kind of detail that aftermarket manuals leave out.

Operating Procedures: Metric System Only

This machine is of metric design. The manual states: “Use only metric hardware and tools as specified.” If you try to use a SAE wrench on a metric fitting, you’ll round it off and create a leak. The manual gives SI units with English units in parentheses—so you get familiar with the numbers. For example, hydraulic pressure is listed as 24.5 MPa (3560 psi). That’s a spec you need for setting the relief valve. Don’t trust a generic chart; this manual has the exact factory value.

3 Reasons to Trust OEM Documentation

First, the manual is copyrighted 2006 by Hitachi Construction Machinery Co., Ltd. It’s the same document that ships with the machine. Second, it includes warranty terms and field improvement policies—things no third-party reprint will ever show. Third, the printed-on-recycled-paper note and the “Permanent part of your machine” statement mean this book was designed to stay with the equipment for its entire life. You can’t get that from a PDF scrounged off a forum.

If you’re working on a ZAXIS 850-3 or 870LCH-3, you need this exact manual. The aftermarket stuff I’ve seen had the wrong torque values for the track adjuster—and that’s a safety hazard. Stick with factory data. For deeper repair work, check out the Hitachi ZAXIS 850-3 870H-3 2006 Technical Manual – Section: Workshop Manual”>workshop manual for the same year. That covers the teardown procedures. Also, the Hitachi ZAXIS 850-3 850LC-3 870H-3 870LCH-3 Troubleshooting”>troubleshooting guide can help when you have a no-start or a hydraulic issue. And if you need the 2007 version, grab the Fiat-hitachi 850-3, 850LC-3, 870H-3, 870LCH-3 2007 Operators Manual – OEM Factor”>2007 operators manual too—there might be updates.

For background on how these machines work, a good overview of Manual Transmission”>manual transmission principles is useful if your excavator has a travel drive. Also, understanding Manual Transmission”>manual transmission basics helps when diagnosing final drive noise.

Frequently Asked Questions

Does this manual cover the fuel injection pump settings?

No. This is an operators manual, not a service manual. It covers daily checks and safe operation. For pump specs, you need the workshop manual.

Can I use this manual for the 850-3 even if my machine has a higher serial number than 20001?

The manual states “Serial No. 20001 and up.” That covers all subsequent production. However, Hitachi sometimes releases revisions for later serial number breaks. If your machine is very late model (after 2007), check the 2007 edition for any changes. The basic operator procedures remain the same, but safety decal locations or fluid specs might be updated. I recommend cross-referencing with the serial number plate to be sure. The manual is printed “2006, 02” so it’s the early version. For most machines built from 2006 onward, it’s accurate. If you have a 2008 machine, the 2007 manual might be better. But this one gets you 95% of the way there.

Access the Factory Manual and keep it in the cab with the machine. You’ll save hours of guessing, avoid costly part mix-ups, and operate with the same specifications the engineers intended. That’s the only way to run heavy equipment properly.