Description

FIAT Kobelco K903-II 1988 Parts Catalog – The Only OEM Source for Part Numbers

Back in ’88 when this machine rolled off the line, Kobelco printed this catalog to make sure you could get the right part the first time. 406 pages. Factory diagrams. Genuine part numbers. That’s what you’re looking at. If you’ve ever ordered a counterweight bolt and got the wrong thread pitch because some online cross-reference was off, you know why this FIAT Kobelco K903-II 1988 Parts Catalog matters.

Parts catalogs aren’t sexy. They’re not supposed to be. But when you’re standing in the yard with a busted hydraulic tank and the machine number is K903-II LE-7872~, you don’t want a generic list. This book is the original. Printed in Japan in July 1988. It covers every K903-II from serial LE-7872 and up. You get exploded views broken into assembly groups – Upper Group, Cab & Guard Group, Hydraulic and Fuel Tank Assemblies, and more. Each assembly has its own page range starting with a prefix like 011-01 for the upper frame. That’s how factory catalogs work: you find your group, you locate the part number, you call the dealer. Done.

UPP FRAME ASSY and Counterweight Groups

Open to page 011-01 and you’ll find the upper frame assembly with every bolt, shim, and bushing called out. Two versions exist: standard and silence (soundproofed). Same for the counterweight assemblies – you get three variants on page 012-01, page 012-20 (standard), and 014-01 for the gain (heavier) counterweight. The part numbers are exact. No guessing. If your backhoe has the silence package, order the parts from 011-03 and 012-03. The catalog tells you that. I’ve seen guys order the wrong counterweight bracket and lose a whole day. This manual eliminates that.

Hydraulic and Fuel Tank Assemblies – Exact Part Numbers

Two hydraulic tank assemblies are listed? Yes. Page 031-01 for the standard tank assembly. Then page 041-01 and 042-35 for fuel tank assemblies. Different customer specs or regional variations – the “specification by customers” table in the front helps you match your machine’s delivery spec to the correct parts. Never order a fuel sending unit blindly again. The pump assembly (fuel) is on page 043-28, and the filter assembly on 045-20. Every bracket, cap, and O-ring is shown in exploded view with a callout number. You need the part number cross? It’s printed right there.

CAB & GUARD GROUP: Cab Installation and Assembly

Starting page 051-01, the cab installation group covers the mount kit and isolators. Three variations: 051-01 standard, 051-28, 051-46. Then the cab assembly itself appears on pages 052-01, 052-28, and 052-35. These are regional or spec differences – if your machine has a FOPS guard or a different heater, the right cab assembly is listed. You also get the back‑mirror assembly (page 016-35) and the reduction unit (015-01). No need to chase down part numbers from three different dealers.

Why an OEM Parts Catalog Beats Aftermarket Cross‑Refs

Aftermarket parts catalogs pull numbers from databases that may have been typed in wrong in 1995. Kobelco Construction Machinery America LLC holds the copyright. This is the genuine article – the same binder the dealer’s parts counter uses. The Japanese original includes machine serial number fields and ordering instructions for the dealer. You get the actual part number, not a suggestion. If you need a workshop manual to go with it, check out the KOBELCO K903-II 1988 Workshop Manual. For newer FIAT Kobelco models, there’s the FIAT Kobelco ED150, ED150-IE 2013 Parts Catalog OEM and the FIAT Kobelco ED150, ED150-2 2009 Parts Catalog OEM Manual.

Want a broad view of how construction equipment documentation evolved? Read the Automotive Industry Overview for context on why OEM specs matter.

Questions That Come Up

Does this catalog cover engine parts?

No. Engine parts are in a separate engine parts manual. The preface says that outright. You need the engine manual for the diesel side.

What serial numbers does this apply to?

K903-II from LE-7872 and up. Earlier machines might share some assemblies, but the book states applicability starting at that serial. Check your machine number before ordering.

Are there wiring or hydraulic diagrams in here?

This is a parts catalog, not a service manual. You get exploded part views and part numbers. No wiring diagrams, no torque specs. That’s what the workshop manual is for.

Can I use this to rebuild a K903-II from the ground up?

If your aim is to identify every nut and bolt by number, yes. The catalog is organized by assembly groups – upper frame, counterweights, reduction unit, fuel system, cab. You won’t find step‑by‑step rebuild instructions, but you will find every OEM part number you need to order. Use it with the workshop manual for a full rebuild.

Stop calling the dealer with a vague description and hoping they guess right. This catalog puts the exact FIAT Kobelco part number in front of you. 406 pages of factory data, printed in 1988, still the standard. Access the Factory Manual.