Description

Kelly T-108, R-312 HD, R-412 HD, R-516, R-208 2003 Parts Catalog – Factory Spare Part Tables

Trying to track down a clutch pack or mechanical lock for an old Kelly telescopic boom and getting nowhere with aftermarket part numbers? Been there. You order what the online parts house says fits, and it doesn’t, and you’re down a machine and out the cost of shipping both ways. This Kelly T-108, R-312 HD, R-412 HD, R-516, R-208 2003 Parts Catalog is the factory spare part tables – the exact 438-page binder that Kelly service centers used to pull part numbers. No guessing. No cross-referencing four different websites. Just OEM codes, load ratings, and bore diameters for the models listed below.

Models Covered: T-108, R-312 HD, R-412 HD, R-516, R-208

This catalog covers five primary telescopic boom models – T-108 (cannotto Ø 324), R-312 HD (cannotto Ø 355), R-412 HD (cannotto Ø 355), R-516 (cannotto Ø 406), and R-208 (cannotto Ø 324). It also includes supplementary tables for R-518, R-622 HD, R-722 HD, R-725, R-825, and others (see OCR data). Each model gets its own section with part numbers for frizione (clutch) and blocco meccanico (mechanical lock) assemblies, broken down by number of plates and load capacity. For instance, the T-108 lists clutch cod. 03230572 (3 x 7000) and mechanical lock cod. 03230573 (3 x 7000). Those load figures – 7,000 lb? kg? – are critical for safety. Bolt the wrong rated clutch into a 25-ton boom and you’re asking for a drop. This catalog gives you the factory-specified rating so you don’t have to guess.

Frizione (Clutch) and Blocco Meccanico (Mechanical Lock) Part Numbers

Look at the OCR excerpt: every part code ends with a suffix like “4 x 9000” or “5 x 12000”. That’s the number of clutch plates and the maximum load in lbs (for the US market) or kg. The R-412 HD, for example, uses clutch cod. 03230450 (4 x 9000) and cod. 03230452 (5 x 9000). The mechanical lock options go up to 12,000 lbs. When you’re rebuilding an arm, you need to match the original load capacity exactly – not just the bolt pattern. Using a 4-plate clutch where a 5-plate was spec’d will slip under load and could cause the boom to drift. The catalog also shows which part numbers interchange across models. The R-516 and R-518 share many of the same clutches and mechanical locks, but you wouldn’t know that without the factory cross-reference tables on page 73 (clutch assembly identification table).

Why an OEM Parts Catalog Beats Aftermarket Lists

Aftermarket parts catalogs for telescopic booms are often compiled from old photocopies or guesswork. I’ve seen listings where a $2,500 clutch pack is listed under the wrong model because someone transcribed a handwritten note wrong. This Kelly catalog was printed in 2003 from the factory master files. The part numbers match what Kelly actually stamped on the components. When you’re ordering a blocco meccanico HD (cod. 03230579 – 4 x 8000), you need to be 100% sure that’s the right one for your R-312 HD. The factory table shows the specific load rating and bore diameter (Ø 355). No third-party guesses. For safety-critical parts like these, you don’t want “close enough.”

And speaking of safety – never trust a parts catalog that doesn’t show the load rating. This one does, right in the part number string. If you’re rebuilding an R-208, the clutch cod. 03230512 (4 x 8000) means four plates rated at 8,000 lbs. That’s stamped on the part itself, so you can verify before you install. Aftermarket catalogs often omit those numbers, leading to mix-ups. Stick with the OEM data.

What You Get in 438 Pages

438 pages of factory part tables – not a repair manual. This is a parts catalog, pure and simple. You get exploded-view drawings (some tables are “tavole disegnate” – drawn tables), the part code, description, and the model application. You also get a legend at the start (page 2) that explains the marks: ABC Tavole Disegnate (drawn tables), ABC Tavole Aggiornate (updated tables), and ABC NO DISTINTA (no bill of materials – updated to July 2003). If you’re trying to figure out whether a part has been superseded, the legend tells you. The catalog also includes model groups like CM-40, R-412/R-10, R-515/R-12, R-618/R-15/R-12 with their own bore diameters (Ø 299). That’s the kind of granular detail you need when you’re dealing with 20-year-old machines. Massey-Harris-Ferguson FF 30 GS 1957 Parts Catalog | OEM Fastener Guide Futura FC200-FC400 Parts Catalog – OEM Wear Parts Specs Longagribusiness 410 DTC, 450, 450 DTC, 470 DTC, 530 DTC 2002 Parts Catalog – those are other factory parts catalogs we carry, but for Kelly, this is the one you need.

External references: For background on why OEM specs matter in heavy equipment, see Automotive Industry Overview. Also check Automotive Industry Overview for the broader context of parts traceability.

FAQ

Can I use this catalog to find repair procedures or torque specs?

No. This is a parts catalog, not a service manual. It lists part numbers, components, and load ratings. You need a separate repair manual for assembly steps and torque values.

How do I decode the part numbers for frizione and blocco meccanico?

The numbering system includes a base code (e.g., 03230572) followed by the plate count (3,4,5) and load rating (e.g., 7000 = 7,000 lbs). The catalog’s legend on page 2 explains the update status. Use the table on page 73 to cross-reference which models share the same part. For example, the R-412 HD and R-516 both use clutch cod. 03230450 for 4 x 9000, but check the bore diameter – R-516 is Ø 406, R-412 HD is Ø 355 – so the clutch housing might differ. Always verify the model-specific drawing table (tavola disegnata) before ordering.

If you’re rebuilding a Kelly telescopic boom and want to avoid the headache of returning wrong parts, get the factory source. Access the Factory Manual now and have every part number, load rating, and cross-reference at your fingertips.