O&K RH1.22SR, RH1.25SR 2004 Parts Catalog

If you’re ordering parts for an O&K RH1.22SR or RH1.25SR excavator and using a third-party list, stop. You’re wasting time and money. This 2004 Parts Catalog from O&K gives you the exact OEM part numbers and ordering rules. 570 pages of factory data. No guessing. I’ve seen too many guys bolt on a part that looked right but had the wrong thread pitch or a different bore diameter because they used an aftermarket cross-reference. That kind of mistake puts a machine down for a day.

Ordering Parts the Right Way

The catalog starts with instructions for ordering spare parts on page 3. Read those before you touch the phone. O&K included ordering rules (page 4) that tell you what information the dealer needs: machine serial number, version, and the item number from this book. Skip that step and you’ll get the wrong part. Pages 25-27 list identification and version details—use them to confirm your machine’s build before you order anything.

7 Languages, One Catalog

This isn’t just an English document. O&K printed the entire catalog in English, French, German, Italian, Spanish, Dutch, and Portuguese. Hand it to a mechanic in any of those countries and they can read the part numbers and notes. Abbreviations are listed on page 22, and each language section has its own notes for consultation. For a machine that may have been sold anywhere in the world, this coverage matters.

Use the Conversion Table on Page 23

Fastener sizes in the catalog can be listed in inches or millimeters. Page 23 has a direct inch-to-millimeter conversion chart. If you’re working on a hydraulic line bracket or a track bolt, use that table—don’t guess. I’ve pulled apart engines where someone used a metric bolt in an inch hole because they didn’t have the conversion. That’s a failure waiting to happen. The table clears it up.

Numerical Index on Page 33

Every part number in the catalog is cross-referenced in the numerical index starting on page 33. Need to find where that seal or bearing lives? Look up the number in the index, get the page and item number. This saves hours of flipping through sections. The index covers all assemblies—engine, undercarriage, hydraulics, cab, etc. No guesswork.

Why Aftermarket Parts Lists Fail

Third-party parts catalogs often use superseded numbers or miss updates. O&K released this 1st Edition in 2004 with the data current at that time. The catalog carries O&K’s own part numbers, not a re-interpretation. When I order a part from a factory manual like this, I know it’s the right number. Aftermarket lists can be off by a digit—and one digit means a different part. Stick with OEM documentation. For context on how factory documentation sets the standard, see Automotive Industry Overview.

If you also work on other O&K models, check the O&K L45, 4500Z 1990 Parts Catalog – Parts Manual TB126, O&K L3000 Parts Catalog – Factory OEM Manual (236 Pages), and O&K L2500 Parts Catalog – Factory Specs for Part Ordering. Each one follows the same factory format.

For a broader look at why OEM documentation matters in heavy equipment, the Automotive Industry Overview explains the importance of original specs.

FAQ

What years does this parts catalog cover?

2004 only.

Does it include torque specs?

No, this is a parts catalog, not a service manual. It lists part numbers, not repair procedures. For torque values, you need the factory service manual. But the conversion chart on page 23 helps if you’re dealing with metric or inch fasteners.

Can I use this to identify my machine’s version?

Yes. Pages 25-27 list identification and version details. Cross-check your machine’s serial number to ensure correct parts.

Why is the catalog in multiple languages?

O&K exported these excavators worldwide. Having the catalog in English, French, German, Italian, Spanish, Dutch, and Portuguese means you can hand it to a mechanic anywhere and they’ll understand the part numbers. Less translation errors, fewer wrong parts.

Skip the aftermarket catalogs. Download the Factory Manual from AutoRepairManuals and get the part numbers O&K intended you to use.