Description

FIAT Kobelco LK550-II 1992 Parts Catalog – Factory Specs

If you are ordering parts for a FIAT Kobelco LK550-II backhoe loader and you don’t have the factory parts catalog in front of you, you are wasting time. I have torqued more head bolts than most people have had hot meals, and I can tell you that guessing part numbers or relying on aftermarket cross-reference lists gets you the wrong seal kit, the wrong gasket, or a bucket tooth that doesn’t fit. This is the 1992 OEM Parts Catalog – 430 pages of exploded diagrams, part numbers, and the serial number breakouts that actually match your machine. The manual runs from serial number RM02201 onward. If you have an LK550-II built after that chassis stamp, this is the list you need. No reprints, no third-party scans, no junk. Factory file from Kobelco Construction Machinery America.

The opening pages lay out exactly how to read the parts list. Page 4 shows you the symbol system – what “A” means for interchangeability (new and old parts swap), what “B” means (do not try to interchange), and what “C” means (new part replaces old one way). That alone saves you from ordering a hydraulic line that won’t thread in. The catalog also tells you how to handle lengths sold by the meter – if the quantity says 2M and the remark says L=1700, you get a 2-meter piece but only need 1.7 meters. Cut it yourself. That level of detail is missing from every aftermarket digital copy I have seen.

Serial Number Mapping: Chassis and Manufacturing Serial

Page 3 gives you the serial number designation table. Your chassis number is stamped on the rear frame – something like LK500-2201. The manufacturing serial number is on the plate. The catalog lists both in a table so you can cross-reference. For example, serial 2201 in the catalog corresponds to manufacturing number RM02201 and chassis LK500-2201. If you have a machine in the range 2201 through 2999, this catalog covers it. If your serial is outside that, you need a later edition. Do not assume all LK550-II machines are the same – I have seen guys order a final drive seal for a 2999 when they had a 3000, and the part is different. Use the table.

7 Key Sections in the Parts Breakdown

The catalog is organized by section numbers – each section is a group of related components with an exploded figure page. You get the section number, the symbol key (letters like A, B, C), and the part number. The symbol with three zeros like 000A means that item is an assembly – you cannot buy the individual piece inside it separately. The catalog tells you that explicitly. I have had technicians try to order a single O-ring from an assembly because they skipped reading the symbol legend. Waste of a phone call. Stick to the symbol guide.

Interchangeability Codes – What the Letters Mean

Inside the parts list you will see columns marked A, B, C with symbols. The catalog defines them on page 2. “A” means the new part and old part are interchangeable both ways – you can put a new part on an old machine or old part on a new machine. “B” means they do not interchange at all – different bolt patterns, different thread pitch, whatever. “C” means the new part works in place of the old part but not the other way around. When you are ordering a hydraulic pump for a machine that has been updated in the field, this saves you from buying a pump that fits only the newer chassis. Check the code.

Does This Cover the Backhoe and Loader Attachments?

Yes. The catalog includes bucket type numbers stamped on the bucket body. You have to provide that number when ordering bucket parts. The manual explains where to find the stamp – it is on the bucket body, not on the machine frame. I have had to tell more than one owner that the bucket teeth they ordered don’t match because they gave me the machine serial instead of the bucket type. The bucket type number is listed separately in the catalog for each bucket option. If your bucket is not original, you may need to measure pin spacing and cross-reference with the figure page. But for OEM buckets, this catalog has the exact part numbers.

How to Use the Parts List Without Getting Lost

Start at section 1 (usually the engine group, though the catalog order is by Kobelco’s numbering). Find your section number, look at the exploded illustration, then match the symbol (e.g., 001) to the part number in the list below. The quantity column tells you how many pieces in a set. If it says 1M, you get a 1-meter length – the remark column gives actual length needed. The abbreviation “A/R” means as required – you determine the quantity based on the repair. That is common for hoses or wiring. For non-sale items, the column shows an “N”. Do not waste time looking for those – you have to buy the assembly instead.

Source Validity: OEM vs Aftermarket Parts Catalogs

This is a factory Kobelco publication – printed in Japan in 1992, book code S3RM1012. The copyright belongs to Kobelco Construction Machinery America, LLC. That means the part numbers, diagrams, and serial number ranges came straight from the engineering department. Aftermarket parts catalogs often renumber parts or use a generic cross-reference that misses the interchangeability flags. I have seen aftermarket catalogs list a single part number for a hydraulic seal that actually changed at serial 2500 – the OEM manual splits it into two separate entries. If you rely on a third-party list, you risk a seal that leaks because the groove depth changed. Use the factory document.

Related manuals: If you work on other Kobelco models, check the FIAT Kobelco ED150, ED150-IE 2013 Parts Catalog OEM for the newer compact excavator line, or the FIAT Kobelco ED150, ED150-2 2009 Parts Catalog OEM Manual for the earlier version. For the larger backhoe, the FIAT Kobelco LK650-II 1992 Parts Catalog – OEM Factory Specs follows the same structure. For background on how OEM documentation supports heavy equipment repair, see the Automotive Industry Overview or Automotive Industry Overview for broader context on standards.

FAQ

Can I use this catalog if my serial number is not listed in the table?

No. The catalog covers serial numbers RM02201 to RM02999. If your machine is outside that range, you need a later edition.

How do I find the correct part number for a seal that is not shown in the illustration?

The catalog lists parts only if they appear in the exploded diagram. Small seals that are part of an assembly (symbol 000A) are not sold separately. You must order the complete assembly. If the seal appears individually, it will have its own symbol and part number. Check the symbol column – if it has three zeros prefix, buy the assembly. If you still cannot find it, contact Kobelco with your chassis number and bucket type – the manual warns that some parts are not available for sale and are marked with an “N” in the SYM column. Do not dig through aftermarket sites; they won’t have the factory interchange codes.

Stop ordering parts blind. Access the Factory Manual – get the exact part numbers for your LK550-II, with serial number breaks, interchange codes, and bucket type references. Print out the section for your assembly, put it in a binder, and leave it in the shop. You will save yourself the trip to the parts counter and the headache of returning wrong parts. This is the same book the dealer uses. Click the button below to get the 430-page PDF.