Description

FIAT Kobelco Construction Machinery S.p.a EX355 2002 Technical Manual

You’re staring at an EX355 that’s losing swing power. The aftermarket PDF you bought says the relief valve should be set to 3,200 psi, but the machine blows the seals at that pressure. You’ve just wasted a set of O-rings and a day of labor. That’s the difference between a generic manual and the 970-page FIAT Kobelco Construction Machinery S.p.a EX355 2002 Technical Manual from the OEM. I’ve been turning wrenches for 28 years, ASE Master, and I’ve seen more ruined components from wrong torque specs and pressure settings than from wear. This is the real deal.

Skip the generic manuals.

970 Pages of Factory-Authorized Data

This manual is split into three volumes: theory of operation, diagnostics, and repair instructions. The PDF you’re getting is the complete technical manual covering principle of operation and diagnostics. That’s 970 pages of factory specs, not some rewritten third-party summary. The bookmarks alone list sections like “INSTALACIONES – Grupo 1 – Mandos” and “Grupo 2 – Hidráulicas” with detailed circuit descriptions. You get the manufacturing data: machine dimensions for monobloc, BEH, and triple articulation versions, engine data, hydraulic component specs, and equipment electrical data. For other equipment, check out Drogobych Crane КТА-16, КТА-25, КТА-28 2004 Installation Manual for crane-specific repairs, or Injectocean Diablo, Murciélago, Defender, Discovery, Freelander Technical Manual for injection system diagnostics. Larger fleet operators might need Minsk MMVZ-3.11212 Technical Manual – Factory Specs.

Hydraulic and Electrical Theory – Principio de Funcionamiento

This section is the core. It breaks down the main hydraulic circuit, servo circuit, neutral circuit, single service operation, and combined operation. Then it goes into the electrical installation: starting circuit, charging circuit, cold start aid, protection circuit, and control panel circuits. Each circuit is described with component locations and flow paths. If you’ve ever tried to trace a short in the cab without a schematic, you know the pain. This manual gives you the full installation layout, including the switch panel, control panel, battery compartment, and fuse locations. You get the actual factory diagrams, not a redrawn version missing a ground point. If you need a refresher on how a Manual Transmission works, external resources can help.

Does the Manual Cover Diagnostics and Performance Testing?

Yes. The second half is “DIAGNÓSTICO DE INCONVENIENTES” – troubleshooting. It includes safety norms (read them, they’re not optional), performance test preparation, standard performance tables, and pump P-Q curves. There’s a dedicated section on engine speed controls and adjustments. You get procedures for testing travel speed, swing chain speed, travel deviation, parking brake efficiency, and swing speed. Each test has a table of acceptable values. For example, the swing speed test tells you the minimum RPM for the swing motor. The travel speed test includes measurements for both high and low gear. The pump P-Q curve test requires you to plot pressure vs. flow and compare to the factory curve. If your machine’s curve is below the limit, the pump is worn. This is the kind of data that aftermarket manuals either omit or copy incorrectly. I’ve seen aftermarket manuals list the wrong test port locations. This manual includes the exact component location diagrams from the “Situación componentes” section, showing the main components, electrical installation, switch panel, battery compartment, and fuse boxes. Without that, you can’t even find the test ports.

Component Operation – Pumps, Rotating Device, and Travel Motors

Understanding how the main pumps, regulator, servo pump, engine speed sensor, and discharge pressure sensor work together is critical for diagnosing performance issues. Similarly, the rotating device section covers the swing motor, parking brake, valve group, and reduction gear. The travel device section details the travel motor, parking brake, travel gear selection, and travel brake valve. Each component section starts with a general overview and then dives into the specific valves and circuits. For example, the distributor section lists the valve names: combinadora de caudal, control bomba, regulación de presión principal, seguridad, recirculación penetrador, recirculación brazo, mantenimiento penetrador, control caudal cuchara, control caudal traslación, exclusión bypass, and válvula de aguja. That’s 13 different valves in the main control valve. Without knowing each function, you’re lost. The travel reduction gear is somewhat similar to a Manual Transmission in principle.

Source Authenticity – Why This Is Not a Reprint

This is a direct scan of the original FIAT Kobelco printed manual from July 2002. Printed number 604.13.209. It’s not a third-party rewrite. The aftermarket manuals I’ve seen copy the torque specs but leave out the diagnostic procedures. They skip the “Grupo 3 – Installación Eléctrica” circuit descriptions and the “Grupo 4 – Manipuladores” control functions. This manual has it all. The file is searchable, so you can find “valvula de seguridad” instantly. I’ve bought enough aftermarket junk to know: you pay for what you get. Get the OEM or waste time.

Is this manual in English?

The manual is primarily in Spanish, as it was published for the Latin American market. However, technical terms and numbers are universal. If you read Spanish, you’re good. If not, the diagrams and specs are still usable.

Does it include torque specifications for the cylinder head?

Yes, the engine data section (Grupo 1 – Características y datos) includes motor data and accessories. Torque values are listed there. Follow those exactly to avoid warping the head.

Will this manual help me fix a hydraulic leak?

It will help you understand the circuit so you can identify the source of the leak. The component operation section describes each valve type, including the makeup valves, relief valves, and check valves. The diagnostic section includes detailed pressure tests for the main pumps, servo pump, and control valve. You measure pressures at test ports and compare to the standard performance tables. That tells you if the leak is internal to the pump or in the control valve spool. For actual seal replacement, you need the repair instructions volume (sold separately), which covers disassembly and reassembly with specific seal part numbers. This manual gives you the theory and diagnostics to pinpoint the problem without tearing everything apart first.

Is it a downloadable PDF?

Yes. After purchase, you get immediate access to the full 970-page searchable PDF. No shipping, no waiting.

Stop wasting money on aftermarket junk that misses half the data. The factory 970-page FIAT Kobelco EX355 Technical Manual is waiting. Access the Factory Manual now and get the specs that actually match your machine.