Furukawa Unic UBA260, UBA340, UBA500, UBA263, UBA264 Installation Manual

I’ve been turning wrenches for 28 years. One thing I know: marine crane installation is not a job for guesswork. If you’re mounting a Furukawa Unic UBA260, UBA340, UBA500, UBA263, UBA264 Installation Manual gives you the factory data you need to get the base right, the hydraulics plumbed, and the load meter set. This 52-page document from Furukawa Unic is the only source for dimensions and procedures that keep the crane from twisting off the deck. I’ve seen guys skip the base mounting specs and end up with a wreck. Don’t be that guy.

What’s in the 52 Pages?

This manual covers exactly what you need to install one of these cranes on a vessel. Starts with a general view of each model – dimensions and center of gravity. Then the installation guide: position, base dimensions, base mounting, optional round base, boom and hook storage. Section 2 pages 2-1 through 2-5. After that, pump and electric motor selection, oil tank, then the piping procedures – that’s section 5, the longest part. Zero-point adjustment of the load meter, rated load sticker placement, and a full list of recommended components. Overall views for every boom configuration: UBA263 (3-section), UBA264 (4), UBA343 (3), UBA344 (4), UBA345 (5), UBA503 (3), UBA504 (4), UBA505 (5). That’s 52 pages of nothing but factory data. Aftermarket manuals don’t have this.

Check the Base Mounting Specs Before You Weld

Page 2-1 shows the dimensions of the crane base for installation. Page 2-2 gives you the base for mounting the crane – weld pattern, bolt size, plate thickness. This is not a suggestion. I’ve pulled cranes off boats where the installer used a thinner plate because they thought “close enough.” The crane twisted the base within three lifts. The manual also covers an optional round-shaped base on page 2-3. You want the factory numbers or you want to re-weld the deck? Your call.

Piping Procedures: Factory Routing and Back Pressure Limits

Section 5 (pages 5-1 through 5-10) is where most mistakes happen. Control valve mounting, hose connections, piping port connections – each one has a specific orientation. Page 5-8 has a caution paragraph that will save your hydraulics: minimum bend radius, hose routing away from hot surfaces. Page 5-9 tells you how to check the recommended allowable back pressure of the control valve. That’s a spec you won’t find in a generic hydraulic guide. Treat the hydraulic circuit like a Manual Transmission – every component has a specific place, and swapping parts without checking the factory diagram will cost you time and money. The hydraulic circuit diagram is on page 5-10. Don’t memorize it; use the book.

Three Reasons to Stick with OEM Documentation

First: zero-point adjustment of the load meter (section 6, page 6-1). That’s how you ensure the crane’s load indicator reads correctly. If you skip this step or use a third-party calibration, you’re guessing at your lift capacity. Second: the rated load stickers (section 7, page 7-1). These are legally required for marine use. The manual shows exactly where and how to attach them. Third: recommended components (section 8). Factory-specified pump, electric motor, optional hydraulic equipment, piping components, mounting base for control valves, even radio remote controller installation. None of that is in a generic manual. Don’t confuse this with a standard Manual Transmission – the back pressure limits are critical and specific to each model.

Zero-Point Adjustment – Not Optional

Page 6-1 is the one you need. The load meter on these cranes has a zero-point that drifts if the crane is installed at a different angle than the factory test stand. The manual walks you through the adjustment procedure step by step. It’s two pages. Do it before the first lift. I’ve seen load meters read 500 kg heavy because the installer thought it didn’t matter. That gets people hurt.

Frequently Asked Questions

Does this manual cover the UBA260 series only?

No, it covers UBA260, UBA340, UBA500, UBA263, and UBA264 – five model series in one manual.

How many pages?

52 pages.

Can I use this for a land-based installation?

The manual is written for marine use – the base mounting section assumes a vessel deck. However, the piping, pump selection, zero-point adjustment, and load sticker requirements apply equally to land-based cranes. The base dimensions will still work for a concrete pad or truck frame, but verify local regulations for land-mounted crane certification.

What is the difference between UBA263 and UBA264?

UBA263 has a 3-section boom, UBA264 has a 4-section boom. Overall views on pages 9-1 and 9-2 show the dimensions and center of gravity for each.

Related Manuals

• Furukawa Unic URW295C1UR Operators Manual – Factory Specs
• Furukawa Unic URA343 URA344 URA345 Operators Manual – OEM Specs
• Furukawa Unic URV290 Operators Manual – Factory Crane Specs

If you’re installing one of these cranes, you need the factory data to get it right. No aftermarket summary replaces the Furukawa Unic installation instructions. Download the Factory Manual and keep it on the workbench – your welders, your hydraulics tech, and your load meter will thank you.