Description

FIAT Kobelco K903C 1987 Parts Catalog

I’ve seen techs order a counterweight for the wrong variant and sit on a $2,000 paperweight for six months. That’s the kind of waste you dodge when you have the actual FIAT Kobelco K903C 1987 Parts Catalog on the bench in front of you – 322 pages of factory-correct part numbers, exploded illustrations, and serial-number-specific breakdowns. No aftermarket reprint, no scanned-and-OCR’d mess. This is the original print from Kobe Steel, printed in Japan in March 1987, covering machines from serial number K903C LE-5701 onward.

UPP FRAME ASSY and COUNTER-WEIGHT ASSY: Critical Assemblies

The table of contents lists the Upper Group first. You get exploded views for the UPP FRAME ASSY (page 011-01) and the silence version (011-03). Counterweight assemblies come in standard, silence, and gain variants – pages 012-01, 012-03, 012-20 for standard, plus the gain versions on 014-01 and 014-03. If you’re swapping a counterweight on a K903C that has the optional silence package, the standard part won’t bolt up. This catalog makes that obvious before you cut a PO.

Hydraulic and Fuel Tank Assemblies

Hydraulic tank assembly is on page 031-01. Fuel tank assembly on page 041-01, with a second listing on 042-35. Fuel pump assembly sits on 043-28, and the filter assembly on 045-20. Each entry gives you the part number, description, and quantity per machine. No guesswork – you order exactly what came from the factory. Compare that to a generic aftermarket list that lumps “fuel tank – fits K903C” and leaves you wondering if it includes the sending unit or the mounting brackets.

CAB & GUARD GROUP: Factory Breakdown

The Cab & Guard group starts on page 051-01 with the cab installation. You get separate listings for cab assembly (052-01), and variants for different serial ranges (052-28, 052-35). The cab pages show every bracket, seal, and fastener. If a customer’s door latch breaks and you need the correct striker, you find it here. No need to pull apart a good cab just to measure something.

Why OEM Parts Catalogs Beat Aftermarket Lists

Aftermarket part catalogs usually copy the factory numbers but drop the revision codes or ignore the “for silence” / “for gain” panels. Then you get a part that almost fits. I’ve had a tech order a back-mirror assembly (page 016-35) from an aftermarket source and get a different shape because they didn’t specify the enclosure variant. This FIAT Kobelco K903C manual shows every variant listed by the original equipment manufacturer. You match your machine’s serial number to the appropriate section, and you’re done. Also note: the foreword clearly states that engine parts are in a separate engine parts manual – don’t expect to find pistons or injectors here.

Who Needs This 322-Page Manual?

If you own or service a K903C backhoe loader from the late ’80s, you need this. Whether you’re a home-garage operator trying to rebuild a hydraulic tank mount, or a shop that sees a K903C once a month, the 1987 Parts Catalog saves you the phone calls to the dealer that no longer stocks these parts. You can cross-reference the Kobelco number to aftermarket equivalents – but you need the right number first. This manual gives you that number, the exact description, and the page location. It’s also useful for pre-purchase inspection: you can check whether a machine still has the factory counterweight or has been swapped with a mismatched unit.

Get the Right Part Numbers from the Factory Source

The manual includes a serial number entry page (page 003) where you record your machine number and engine number. That’s not decoration – it’s the correct way to use this document. Every section heading references the applicable serial range. If your machine falls outside LE-5701, this manual won’t be the right one. For machines in that range, every page is guaranteed by Kobelco Construction Machinery America LLC, copyrighted 2004 for the U.S. edition, but printed from the original 1987 Japanese plates.

If you need the service manual for this machine rather than the parts book, check out the KOBELCO K903C 1986 Service Manual. For newer FIAT Kobelco models, the FIAT Kobelco ED150, ED150-IE 2013 Parts Catalog OEM and FIAT Kobelco ED150, ED150-2 2009 Parts Catalog OEM Manual are also available. For broader context on construction machinery documentation standards, read the Automotive Industry Overview and Automotive Industry Overview.

Does this parts catalog include engine parts?

No. The foreword on page 5 explicitly states that engine parts are in a separate engine parts manual. This catalog covers the backhoe loader chassis, cab, hydraulic system, fuel system, and attachments.

How do I use the table of contents to find a part?

Each assembly has a page number like 031-01 for the hydraulic tank. Find the group (Upper, Cab & Guard) then the subsection. The Japanese and English descriptions are listed side by side. Write down your machine serial number first – some assemblies have multiple variants (standard, silence, gain). Match your machine’s spec to the correct page before ordering.

Will this manual work for a K903C with serial number lower than LE-5701?

No. The cover states “Applicable K903C LE-5701~”. Machines built before that serial number use different parts assemblies. You need the earlier edition.

What is the difference between the standard and silence counterweight versions?

The silence version (page 012-03) includes additional damping and mounting hardware for reduced noise. The gain version (014-01) is a heavier counterweight for machines equipped with extra attachments. The exploded views show the differences clearly. Using the wrong one can affect stability.

Factory documentation like this doesn’t come up often. Access the Factory Manual now and put the correct part numbers in your next order.