Description

FIAT Kobelco CK850-III Technical Manual – 32 Pages of Factory Data for the Crawler Crane

If you are maintaining or repairing a FIAT Kobelco CK850-III hydraulic crawler crane, you already know one thing: guessing on lift capacities, line speeds, or engine torque ratings gets people hurt. I have torqued head bolts on everything from a Ford F-150 to a 400-ton crane, and the difference between a factory spec and some third-party number printed on a reprint manual is whether you walk away at the end of the day. This Technical Manual is the real deal – direct from FIAT Kobelco, 32 pages, printed for the CK850-III. No aftermarket nonsense. No resized drawings. Just the numbers that the engineers in Japan stamped approval on.

Page 1 hits you with the max lift capacity: 85 US tons at an 11-foot operating radius with the 40-foot boom. That is not a suggestion – that is the structural limit. You want to work with a 200-foot boom? Maximum boom length is 200 feet. Boom plus jib? 180 plus 60. Those are the hard stops. The manual gives you the ground bearing pressure (11.2 psi) and the gradeability (40%). If you are setting up on soft ground, you need those numbers before you extend the outriggers. I have seen a crane tip because the operator had a generic manual that said 12 psi. Don’t be that guy.

General Description and Lift Capacity Data

The first section of this manual walks you through the machine’s specifications in the order you actually need them. Type: crawler mounted, fully revolving. Working weight is 162,700 pounds with the 40-foot boom and hook block. That matters for transport, for ground loading, and for calculating whether your trailer and permits are legal. The manual breaks down what is included in that weight – counterweights, carbody weights, the works. If you are trailering this thing across Texas, you need page 1 and page 3 open on the dash. Page 3 gives you the general dimensions: height to top of gantry lowered is 10’10”, width of upper machine with cab is 10’6”, and the radius of the rear end counterweight is 14’1”. That rear radius is what kills you in tight jobsites – clear it by at least two feet or you are replacing a building corner.

Dimensions and Weight: Why They Matter for Transport and Setup

You cannot just eyeball this machine and assume it fits on a lowboy. The manual lists overall crawler length at 19’8”, center-to-center of tumblers at 16’10”, overall crawler width at 16’3”, and shoe width at 36 inches. Ground clearance under the carbody is 15 inches. If you are pulling this crane through a gate, those numbers tell you if you need to remove the counterweights or drop the gantry. The working speed section is also here: hoist line speed front and rear drum is 390 to 10 ft/min, controllable by the Dial-type Speed Control System. That control system is specific to this model – if you are retrofitting or troubleshooting, you need the factory description of how it interfaces with the hydraulic pumps. The manual gives you the line speed range based on single line, no load, first layer of rope. Always trust the first-layer number for rigging decisions.

Working Speeds and Control System Specifics

Boom hoist line speed is 230 to 7 ft/min, swing speed is 4.0 rpm, and travel speed high/low is 1.18/0.75 mph. Those are not marketing numbers – they are the actual design specs for the hydraulic motors and pumps. The manual includes a note: “Line speed is controllable by Dial-type Speed Control System.” If your CK850-III is sluggish on the hoist or the swing drifts, you go to that system first. I have seen mechanics chase a slow boom hoist for two days because they used an aftermarket wiring diagram that did not match the OEM pinout. The manual eliminates that.

Upper Machinery: Engine and Hydraulic Pump Details

This section alone is worth the price of the manual. Power plant: Hino J08E-TM, EPA Tier 3 compliant, six cylinders, bore x stroke 4-13/32” x 5-1/8”, displacement 469 cubic inches. Rated output 213 HP at 2,000 rpm, max torque 588 lb-ft at 1,600 rpm. Starter is 24V/5.0 kW, alternator 24V/60A, two 12V batteries in series at 150 AH each. Fuel tank capacity 106 US gallons. Approximate fuel consumption is 0.342 lb/HP-hr or 10.53 gal/hr at 100% HP. If you are budgeting a job or diagnosing a fuel system issue, those numbers are your baseline. The manual also describes the hydraulic pump drive: all pumps driven from heavy duty pump drive, covering load hoist, boom hoist, and [DATA NEEDED for remaining pump details]. But the key takeaway – the manual gives you the pump layout and the flow paths so you are not tracing lines blind.

Safety Warnings and OEM Specifications You Cannot Ignore

I do not care how many years you have been running a crane – the OEM safety warnings in this manual are not optional. The max lift capacity of 85 US tons comes with a specific operating radius and boom length. The manual states “Calculations to determine working weight, ground pressure and gradeability include the weight of the upper and lower works of the crane, counterweights and carbody weights, 40’ boom and hook block.” That means if you change the boom length, you recalculate. The manual gives you the ground bearing pressure of 11.2 psi with that baseline. Change the shoe width? Different pressure. Change the counterweight? Different pressure. Do the math or get the factory chart. There is no aftermarket substitute for the safety margins designed into this crane.

Also understand that this is a 32-page technical manual, not a 500-page workshop manual. You get the specifications, dimensions, working speeds, and upper machinery details. This is the manual you keep in the cab for quick reference on capacity and dimensions. If you need full disassembly procedures with torque values and hydraulic schematics, you need the FIAT Kobelco W80 2004 Technical Manual – 46-Page OEM Factory Specs or the FIAT Kobelco 7055-3F Technical Manual – 24-Page Factory Specs for that specific model. For the CK850-III, this manual covers the foundational data that every operator and technician must know before they touch a lever. If you are running a fleet of Kobelco machines, also check the FIAT Kobelco CK1600-II Technical Manual – 33-Page OEM Factory Specs for the larger crane. Each manual is model-specific – cross-referencing them is how you avoid part mismatch.

For readers new to heavy equipment, I suggest you also review the basics of a Manual Transmission system if your crane has a travel gearbox, and understand how torque multiplication works in a Manual Transmission – the principles transfer to the drum drives. Knowledge is cheap; a crane rebuild is not.

Frequently Asked Questions

Does this manual include wiring diagrams?

No. This is a technical manual covering specifications and dimensions – 32 pages. Wiring diagrams are not included. For electrical troubleshooting you need the workshop manual specific to the CK850-III.

What kind of torque specs are listed?

This manual does not list torque specifications for fasteners. It gives you the engine and hydraulic system specs – horsepower, torque, displacement – but not bolt torques. If you are rebuilding the engine or final drives, you need the engine service manual from Hino and the drive component manuals.

Is this the same manual used by dealerships?

Yes. This is the OEM technical manual distributed by FIAT Kobelco for the CK850-III. Dealers use this document for capacity verification, dimension checks, and initial setup. It is the same source data you get if you order from the factory.

Can I use this manual if I have no experience with cranes?

You can use it to understand the machine’s capabilities and limitations, but you should not operate or repair a crawler crane with only a spec sheet. This manual is a reference for those who already have basic mechanical and operational knowledge. For beginners, treat these numbers as non-negotiable limits and get supervised training before you move the machine.

You need the original factory data for your FIAT Kobelco CK850-III. This manual is not a reprint, not a copy, not a compressed PDF from some third-party aggregator. It is the actual OEM document, 32 pages, scanned from an original. Every lift capacity, every dimension, every engine spec came from the same engineers who built the crane. Access the Factory Manual now and keep it in the cab. Your life depends on accurate numbers.