Description

Kubota KX 121-2 Parts Catalog – 354 Pages of Factory Part Numbers

If you’re ordering parts for a Kubota KX 121-2 without the factory Parts Catalog, you’re wasting time and money. I’ve seen guys throw a water pump at an engine because the aftermarket cross-reference was one digit off and then wonder why the flange didn’t match. This catalog—354 pages of OEM part numbers, exploded illustrations, and destination codes—is what you need sitting on the bench next to the laptop. Not a scanned reprint from some third-party site, not a condensed cheat sheet. The original factory file.

3 Model Configurations – Crawler, Rubber, Cabin, Accumulator

Page 3 of the catalog shows the Table of Models. You’ve got multiple machine code variants: iron crawler, rubber track, with or without cabin, accumulator-equipped, different arm lengths (1275 mm and 1600 mm). Each code—like RG709-0100 or RG709-0111—points to a specific destination: KE for France, KDG for Germany, KUK for UK. If you order a water pump for a KDG machine using a KE part number, you get the wrong flange. The manual lists exactly which part numbers apply to which serial range. See the WATER PUMP group on drawing page S023. The Assy Pump, Water 15800-7303-0 is for machines up to serial 15000; 15800-7303-2 for 15001 and later. That level of detail saves you a return shipping label.

Water Pump Assembly – Flange Variations and Bearing Specs

Look at the WATER PUMP section in the catalog. Flange part number 15800-7352-0 vs. 15800-7352-2. Bearing 15830-7335-0. The drawing page is S023, and the illustration shows the assembly with callouts. You get the exact quantity per machine and the serial number break. No guesswork on whether a bolt pattern changed mid-production. If you’re rebuilding a KX 121-2 engine and need the water pump gasket set, you cross-reference the group number here, not some online forum.

Does This Catalog Include Torque Specs or Repair Procedures?

This is a Parts Catalog, not a service manual. It does not list torque values, tightening sequences, or disassembly steps. What it does contain: exploded parts diagrams, part numbers, quantities, and remarks like “Example – 2” indicating illustration details. If you need torque specs, you want the Automotive Industry Overview from the service manual. But for ordering parts, this catalog is the source. Never guess when you can verify.

Audience Fit – Who Needs This on the Workbench

Professional mechanics maintaining fleet excavators, rental yard shops that replace wear parts fast, and serious home owners who don’t like throwing money at wrong bearings. If you’re a DIY owner-operator of a KX 121-2 and you’ve ever ordered a blade part that didn’t fit, this catalog fixes that. You get the destination code (KE, KDG, KUK) and the exact code number for your machine. Match that against your machine’s serial plate, then order the part. No call to the dealer asking “what’s the part number for the water pump?” – you already have it.

Source Validity – Why Factory OEM Beats Aftermarket

Aftermarket parts catalogs often combine models, skip destination variants, or use generic illustrations. This one is scanned from the original Kubota document (file name Kubota_KX_121-2_Parts_Catalog_en-fr-de-29114005715.pdf). Notice on page 2 the multilingual notice: “This Partlist is for the following purposes… When ordering parts, check with this Parts List to confirm the Part No.” Kubota themselves wrote that. You can verify part numbers against the actual printed edition. The catalog includes model codes like RG709-0100 and specifies iron vs. rubber track, cabin presence, and accumulator. Aftermarket catalogs rarely track that granularity. If you want to see what a real manufacturer produces, check the Automotive Industry Overview for context – but for your KX 121-2, stick with the factory file.

Does this catalog cover the hydraulic pump or track motor?

It includes crawler, rubber track, blade, bucket, arm, and engine groups. The Table of Models lists configuration codes for each variant. Hydraulic components are typically covered in separate sections; the catalog groups them by machine code. Check the drawing page numbers to find your specific assembly.

Is this a service manual with torque values?

No. It is a parts catalog. No torque specs, no repair steps. You need the separate service manual for that.

Can I get a digital access after purchase?

Yes. The file is a PDF with 354 pages. You can search by part number or illustration group. No watermarks, no password restrictions.

What if my machine has an aftermarket cab or modified arm?

The catalog only covers OEM configurations. Aftermarket modifications use different part numbers not listed here. You’ll need to measure and cross-reference manually.

Don’t waste another hour cross-referencing used parts on forums. Get the factory document that tells you exactly what part number fits your KX 121-2, whether it’s a KE France unit or a KDG Germany machine. Access the Factory Manual and start ordering with confidence that only verified OEM data gives you.

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