Description

Hitachi Sumitomo SCX700 Technical Manual

You ever try to set up a 70-ton crawler crane using aftermarket data? I have. You end up chasing numbers that don’t match the machine in front of you. That’s how lifts get dangerous. This Hitachi Sumitomo SCX700 Technical Manual is the factory document—27 pages of the exact specs Hitachi Sumitomo stamped on the production line. No reprints, no third-party guesswork. If you’re running an SCX700 on a job site in North America, this is the binder you want on the seat next to you, not a photocopy from someone’s uncle.

Specifications on Page 3: What You Actually Get

Page 3 lists the max rated load at 70 t × 3.7 m working radius, basic boom length 9 m, and max boom 54 m. Winch line pull is 15.6 t max, with rated line pull at 6.5 t. Line speeds on the main hoist drum hit 110/74/37 m/min depending on load. You also get the Isuzu 4HK1X engine specs—147 kW at 2,100 rpm, 688 N·m torque at 1,500 rpm. Travel speed is 1.5/1.1 km/h. Ground contact pressure 82.2 kPa (0.83 kgf/cm²). Operating weight 64.9 t with the 9 m boom and 70 t hook. Those numbers are factory-measured, not somebody’s approximation after a second cup of coffee.

Crane Ratings: 360° Working Area (Pages 9–11)

Pages 9 through 11 cover the main boom and jib ratings for full 360° rotation. Page 9 gives the main boom chart; pages 10–11 handle jib ratings. If you’re rigging a fly jib, you need those specific values because the crane’s capacity drops faster than a rock when you add that stick. The manual breaks it down by boom length and radius. I’ve seen guys try to fudge these numbers using a general chart from another model. That’s how you end up with a crane on its side. Stick with the factory numbers printed here.

Full-Luffing Tower Crane Setup (Pages 13–22)

Starting on page 13, the manual switches to full-luffing tower crane configuration. You get dimensions, tower jib construction, and specifications. Then pages 14 through 20 list rated loads for tower lengths from 25 m up to 43 m in 3 m increments—each with its own working range diagram. Page 21 shows tower boom and jib construction along with fly jib and tower/crawler crane combo builds. Component weights for transport are on page 22. That section alone saves you hours of calculating what fits on a lowboy trailer. If you’re converting the SCX700 between crawler and tower mode, this section is your roadmap.

Clamshell and Dragline Attachments (Pages 23–24)

Page 23 covers clamshell dimensions, specs, working ranges, and bucket data. Page 24 does the same for dragline. Both attachments change the load dynamics significantly. The manual gives you the correct working ranges so you don’t overreach and drop the load. I’ve seen dragline buckets swing into the cab because someone thought the standard crane chart applied. It doesn’t. These pages keep you out of that kind of trouble.

Technical Data: Standard Equipment (Pages 25–26)

Pages 25 and 26 list standard and optional equipment straight from the factory. You get the full lineup of what ships with the machine and what you can add. No guesswork on whether your crane came with the auxiliary hoist or a particular boom section. That’s critical when you’re ordering parts or prepping for a job miles from the shop.

Before you pick up a wrench or a load chart, understand that the SCX700’s travel drive is hydraulic—not a Manual Transmission like you’d find in a pickup. The hydraulics need specific pressures and flows. The manual doesn’t cover every internal rebuild, but it gives you the specs to verify system performance. For operation and daily use, pair this technical manual with the Hitachi Sumitomo SCX700 Operators Manual – 402-Page Factory Operation Guide’>Hitachi Sumitomo SCX700 Operators Manual – 402-Page Factory Operation Guide. For deeper repair work, the Hitachi Sumitomo SCX700 Technical Manual – Factory Specs for 70t Crawler Crane’>Hitachi Sumitomo SCX700 Technical Manual – Factory Specs for 70t Crawler Crane is what you’re already looking at. And if you need part numbers, grab the Hitachi Sumitomo SCX700 Parts Catalog – 814-Page Factory Original’>Hitachi Sumitomo SCX700 Parts Catalog – 814-Page Factory Original.

One last thing: if you’ve ever had a load chart mismatch because someone used Manual Transmission gear ratios to estimate hydraulic motor speeds, you’ll appreciate that this manual gives you the real numbers. Don’t rely on aftermarket data for crane work. Access the factory manual.

Frequently Asked Questions

Does this manual cover the engine overhaul?

No. This is a technical manual focused on dimensions, load charts, specifications, and equipment lists. For engine repair, get the service manual for the Isuzu 4HK1X.

Are the load ratings in imperial or metric tons?

The manual uses metric tons (1 t = 1,000 kg). Page 3 notes that all values are in SI units with conventional units in parentheses where applicable. Convert as needed for your region.

What configurations are included in the 27 pages?

You get crawler crane, full-luffing tower crane (25 m to 43 m tower lengths), clamshell, dragline, and standard/optional equipment lists. Each section has rated loads, working ranges, and component weights. That covers the primary roles of the SCX700.

Can I use this manual for a non-Asian market SCX700?

The cover states this specification is for the Asian issue and is not applicable to European and North American areas. However, the machine structure is often identical; the difference is in local safety regulations. Cross-check with your regional manual if available. The load data will be the same because the crane’s mechanical limits don’t change by continent.

Factory specs are the only specs for crane work. Whether you’re setting up a 9 m boom or a 43 m tower, the numbers in this 27-page technical manual come straight from Hitachi Sumitomo. Don’t trust aftermarket copies. Access the Factory Manual and keep it within arm’s reach on the job site.