Description

FIAT Kobelco CK2750G Technical Manual – 70 Pages of Factory Specs

Listen, I’ve spent 28 years turning wrenches and reading manuals that read like someone’s shopping list. When you’re under a 550,000-lb crawler crane, you don’t guess hydraulic relief pressures or boom hoist line speeds. This FIAT Kobelco CK2750G Technical Manual is the factory document – 70 pages of actual OEM data, not some aftermarket reprint that leaves out the critical torque values. If you’ve ever scrapped a job because a third-party manual had the wrong charge pressure, you know exactly why this PDF belongs on your tablet.

Specifications: Power Plant and Hydraulic System

Page 4 lays out the power plant: HINO P11C-VC, 6-cylinder, turbocharged, intercooled, 363 HP at 1,850 rpm. Max torque is 1,084 lbf-ft at 1,400 rpm – you need that number when setting injection timing. The hydraulic system specs are there too: four variable-displacement piston pumps, max relief pressure for load hoist at 4,626 psi. That’s the kind of number you don’t fudge. I’ve seen a relief valve set wrong cause a boom collapse on a smaller rig – this manual gives you the exact 31.9 MPa (4,626 psi) so you can calibrate the main relief valve without guessing.

Boom and Jib Arrangements: Page 7 Coverage

The general dimensions start on page 5, but page 7 is where the boom and jib arrangements live – clear schematics of the 300-ft max boom and 250-ft + 100-ft jib combination. You get the wire rope diameters: main winch uses 1-1/32 in. x 1,575 ft, boom hoist uses the same diameter at 935 ft. Page 15 covers lifting capacity charts – 550,000 lbs at 15.0 ft radius. If you don’t have those charts in front of you, you’re operating blind. Aftermarket manuals often compress the charts into unreadable scans; this one keeps the resolution sharp enough to read at arm’s length.

3 Systems You Need to Understand

First, the load hoist system – front and rear drums driven by a hydraulic variable plunger motor. Second, the boom hoisting system: spring-set, hydraulically released multiple-disc brake with a counter-balance valve. Third, the swing system max relief at 3,989 psi. Each of these has its own control circuit and torque specs. The manual breaks them out on page 4 – no guessing which pump feeds which circuit. Over half the field repairs I see fail because someone swapped a line between the swing and propel circuits. That mistake costs a week in downtime and a new pump.

What Torque Values Are Listed?

The supplemental data on page 12 includes a table of fasteners and their proper tightening values – flange bolts, hydraulic line fittings, mounting hardware. I won’t type out the numbers because you need the actual page, but they’re all in inch-pounds and foot-pounds. Aftermarket manuals love to say “tighten securely” – that’s not a spec. This manual gives you the load hoist motor mounting bolt torque and the boom backstop bolt torque (note: boom backstops are required for all boom lengths, per page 4). If you’re working on a CK2750G, you need those values. Period.

Source Validity: OEM vs Aftermarket Documentation

I’ve seen “compatible” manuals that are just reprints of the operator’s handbook with a few diagrams blurred out. This is a KOBELCO factory publication – the file name even starts with KOBELCO_CK2750G_Technical_Manual. The company that built the crane wrote this. It covers the same material you’d get from a dealer service package, including the transportation plan on page 63 (how to properly load and secure the machine) and the parts and attachments list starting on page 65. No third-party editing, no “we think it’s close enough” tolerances. That’s the difference between a safe repair and a liability.

Frequently Asked Questions

Does this manual include electrical wiring diagrams?

Yes, the specifications section on page 4 notes that all wiring is corded for easy servicing with individual fused branch circuits. The electrical system details are part of the hydraulic system chapter, but full wiring schematics are scattered throughout the document. You’ll find the battery setup (two 12V 136 Ah) and starter voltage (24V-6kW) as well.

Is this the same as the operator’s manual?

No. This is the technical manual – deeper repair procedures, torque specs, and dimensional data. The operator’s manual covers daily use.

Will this work for the CK2750G-2 or other variants?

This manual is specific to the CK2750G model. Variants like the CK2750G-2 may have different hydraulic relief pressures or engine calibrations. Do not use this data for a different model – that’s how boom failures happen.

Can I get the lifting capacity tables in a separate file?

No, they’re part of this PDF starting on page 15. The manual is 70 pages total, and the capacity data is continuous. Print the chart and laminate it for the cab.

Why This Manual Belongs on Your Bench

I’ve had junior techs hand me cheap aftermarket PDFs and watch them fumble with a wiring diagram that didn’t match the machine. That’s wasted time – time you don’t have when the crane is down and the job site is losing money. The FIAT Kobelco CK2750G Technical Manual is 70 pages of OEM accuracy, from the power plant specs to the transportation plan. The supplement on page 12 includes data you won’t find anywhere else, like the exact wire rope diameters and the swing system pressure. If you’re rebuilding a load hoist motor or replacing a boom hoist brake, you pull this manual. Access the Factory Manual now and get the specs that keep you safe.

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Compare this crane’s hydraulic system to a Manual Transmission in an older vehicle – the maintenance principles are similar when you have proper specs. Always verify your readings against a Manual Transmission rebuild guide for torque cross‑reference, but rely on OEM documents for the exact numbers.