Description

Terex Schaeff HML 20 1993 Parts Catalog – OEM Diagrams & Part Numbers

You ever chase down a hydraulic fitting for a 1993 mobile excavator, only to find the aftermarket catalog swapped the thread pitch? I have. More times than I care to count. That’s why when you need a part for the Terex Schaeff HML 20 1993 Parts Catalog, you go straight to the source – the factory-issued book from Schaeff-Terex GmbH & Co. This is not a reprint, not a generic parts list. It’s the original 264-page catalog published in 1993, covering Series A machines from serial number 131/0340 up to 131/0425. Three languages (German, English, French) so you don’t misread a part number because the translation got lazy.

Page 3 gives you the preamble and the “Benutzerführung” – the guide for user. This is where they tell you how the catalog is structured: by main groups, then subassemblies. No guessing which group contains the slew column. Page 4 shows the actual breakdown with an example – step 1: main group “working equipment” (4.000), step 2: subassembly “slew column” (4.001). If you’ve ever wasted billable hours flipping through a disorganized PDF, you’ll appreciate this setup.

Main Groups: How the Catalog Organizes the HML 20

The catalog splits the machine into “Haugruppen” – that’s Hauptgruppen, main groups. From the table of contents you get the contents by group (Inhaltsverzeichnis nach Gruppen) and an alphabetic index (Inhaltsverzeichnis nach Alphabet). Need a part for the undercarriage? Go to the right group number. The group numbers, like 4.000 for working equipment, are consistent across the series. You don’t need to cross-reference three different spreadsheets.

Each subassembly page has an exploded drawing with reference numbers that match the parts list. The part numbers are the factory OEM numbers – not some aftermarket renumbering that leads to a different bolt length. If you’re rebuilding the swing drive or replacing hydraulic cylinders, you need the correct casting numbers. This catalog has them.

Order References and Bestellhinweise

Section 0.002 is “Bestellhinweise” – order references. The catalog tells you exactly how to order parts: what information you need to provide (type, serial number, part number). It also lists the main groups and their descriptions. If you’ve ever had a parts counter guy ask for a serial number and you didn’t have it, you know the headache. This manual walks you through the process so you get the right part the first time.

Does This Catalog Cover Your Specific HML 20 Serial Range?

The edition is 1.93, valid from serial number 131/0340 to 131/0425. Not all HML 20s are the same – earlier or later machines may have different component suppliers. The pages clearly mark where part numbers change with serial number cutoffs (look for the “> xxxx / x xxxxx = bis Fz.-Nr.” notation). If your machine falls outside that range, you need a different edition. Check the related manuals below for other year ranges.

Audience Fit: Who Should Buy This Catalog

If you own a 1993 Schaeff HML 20 and you’re doing your own maintenance or restoration, this catalog saves you from ordering the wrong boom cylinder seal kit. Also useful for equipment dealers who need to look up parts for customers. It’s not a repair manual – no torque specs, no service procedures. It’s a parts identification tool. But for parts ordering, it’s the only document you should trust. Aftermarket part catalogs often combine multiple models and mis-label components. This one is machine-specific.

Professional mechanics working on older compact excavators will appreciate having the original drawings. When a customer brings in a HML 20 that won’t steer, you can trace the hydraulic hose routing from the diagram and identify the exact hose assembly number.

Source Validity: OEM vs Aftermarket Catalogs

This is a direct scan of the factory-printed catalog from Schaeff-Terex GmbH & Co., Langenburg, Germany. The PDF includes the original cover with the serial number range, the preamble from the manufacturer, and the complete parts breakdown by subassembly. No third-party renumbering, no omitted illustrations. I’ve seen aftermarket catalogs that list a part for the HML 20 that actually belongs to a different model – that’s how you end up with a 12mm bolt hole that needs a 14mm bolt. Is it worth the risk? For a $19 part maybe not, but when you’re rebuilding a $50,000 excavator, get the factory data.

Check out the Schaeff Terex HML 20 Parts Catalog 1.91 if your machine is a 1991 build. For other Schaeff-Terex models, see the Schaeff-Terex SKL 863 2003 Parts Catalog and SCHAEFF-TEREX SKL 853 2003 Parts Catalog.

Need background on the Automotive Industry Overview? The same principles of parts sourcing apply to construction equipment: OEM documentation is the only guarantee of fitment. Automotive Industry Overview – though this is off-road gear, the documentation philosophy is identical.

FAQ

Can I use this catalog to find torque specifications for the cylinder head bolts?

No. This is a parts catalog, not a service manual. It contains exploded views and part numbers only. For service procedures, you need a separate repair manual.

How do I know if my HML 20 serial number is covered? The serial number on my machine is 131/0387 – will the diagrams match? Yes, because 131/0387 falls between 131/0340 and 131/0425. The catalog covers that exact range. But you should still verify the specific subassembly page notes any serial number cutoffs – the catalog uses symbols like “> xxxx / x xxxxx = from s/n” to indicate when a part changed. If you see a notation that the part is valid only up to a certain series number, order accordingly. If you ignore those notations, you may get a component that doesn’t fit. Also check that the machine is “Serie A” – the catalog title says “HML 20 Serie A”. If your machine is a later series (B or C), this catalog will not match. In that case, look for the appropriate edition.

Stop wasting money on wrong parts. Access the Factory Manual – get the actual OEM parts catalog in PDF, with all 264 pages, and start ordering the correct components for your Terex Schaeff HML 20.