Description

New Holland TF46, TF42, TF44 Parts Catalog – Factory Specs for the Mercedes-Benz Engine

Ever order a part for a combine and end up with something that doesn’t fit because you relied on a generic diagram? I see that mistake in the shop every season. That’s why this catalog exists. Factory parts catalogs aren’t repair manuals — they’re the parts identification bible. This one covers the New Holland TF46, TF42, TF44 Parts Catalog for the Mercedes-Benz OM 422 (TF46) and OM 421 (TF42/TF44) engines. 42 pages of OEM part numbers, exploded views, and ordering instructions pulled straight from Mercedes-Benz microfiche. No reprints, no aftermarket guesswork.

Engine Block and Cylinder Head: Pages 25–27

Group 01/1 covers the engine block starting on page 25. Group 01/3 handles the cylinder head on page 27. These pages come from Mercedes-Benz pictorial catalogue print BK 0352 edition F dated 10/85. Every bolt, gasket, and cylinder sleeve is numbered with a figure reference. You trace the part number from the illustration, match it to the engine serial number, and order. The catalog tells you exactly which figure to use — no flipping back and forth through a generic online database.

What Does the Group Index Tell You?

Page 4 gives you the group index. You look up the system you need — say fuel injection equipment under group 07/2 on page 31 — then jump straight to the illustration. The index uses two numbering systems: standard Mercedes-Benz group numbers (like 01/1) and SA (Sonderaufhängungen) numbers for New Holland-specific brackets and mounts. For example, the fuel injection pump is listed under SA 018338 on page 31. If you order a fuel injection pump without specifying the SA number, you’ll likely get the wrong one because the standard Mercedes pump and the New Holland configuration use different mounting plates. That’s the kind of detail aftermarket catalogs miss.

42 Pages of Factory Grouped Parts

The catalog runs 42 pages from page 25 to page 49, plus cover and foreword. Standard engine components fill pages 25–49. Special New Holland parts (SA groups) appear after that with their own SA reference numbers. You get the full parts breakdown for the crankshaft, rocker gear, and valves on page 28 (group 03). The camshaft, piston, and flywheel show up on page 29 (group 05). Oil pump is group 18/1 on page 44; water pump on page 46. This is not a repair sequence — it’s a parts ordering tool. But if you need to know which crankshaft bearing shell to buy, this is the document.

Crankshaft, Camshaft, and Valves: Page 28–29

Page 28 covers group 03: crankshaft, rocker gear, and valves. Page 29 covers group 05: camshaft, piston, and flywheel. Each component has a figure reference. The connecting rod, for instance, is figure 25 on page 28. When you order, you give the engine serial number, the catalogue print number (BK 0352 edition F), the page number, group, figure reference, and quantity. That level of specificity is why OEM catalogs work. Aftermarket catalogs skip the engine serial number check and let you guess. That costs you time and money.

Using the Data Card to Order Correct Parts

Every Mercedes-Benz engine comes with a data card listing unique parts for the New Holland configuration. The catalog tells you on page 2: it is essential that this card is made available when ordering. Without it, parts like the fuel injection pump mounting brackets or the exhaust manifolds (SA 082240) can’t be matched correctly. The data card has the engine serial number, which you must provide. Page 3 gives two examples — one for a connecting rod using standard group/page, one for a fuel injection pump using the SA number. Do yourself a favor: keep the data card with this catalog.

Why OEM Matters for Parts Catalogs

Aftermarket parts catalogs often copy the illustrations but omit the revision dates and microfiche references. This catalog is a direct extract from Mercedes-Benz dealer microfiche. The part numbers come from the same system dealerships use. If you cross-reference a part number from this catalog with a genuine Mercedes part, it will match. I’ve seen aftermarket catalogs list a fuel injection pump without the SA number, and the pump doesn’t clear the engine mounting bracket. That’s a bleed heartache you don’t need.

If you need parts for other New Holland models, check the Ford New Holland 853 1993 Parts Catalog or the Ford New Holland 568 1991 Parts Catalog. There’s also a Ford New Holland 1915 Tractor 1993 Parts Catalog – Section: Supplement that covers similar engine configurations. For background on the engine platform, see the Automotive Industry Overview on Wikipedia. Another good reference is the Automotive Industry Overview for understanding the manufacturing standards behind these parts.

Frequently Asked Questions

Can I use this catalog to identify parts for a non-Mercedes engine?

No. It’s specific to the OM 422 and OM 421 engines used in these New Holland combines.

Do I need the engine serial number to order parts?

Yes. The catalog requires the engine serial number and the data card. Without them, you risk getting wrong parts. This is explained on page 3 of the catalog.

How many pages cover the engine block?

Page 25 covers group 01/1 for the engine block cylinder block assembly. That’s one page with multiple figure references.

What is the difference between group index numbers and SA numbers?

Group index numbers (like 01/1) refer to standard Mercedes-Benz engine components extracted from microfiche print BK 0352 edition F. SA numbers (like SA 018338) refer to special New Holland configurations such as the fuel injection pump mounting brackets or exhaust manifolds. When ordering, you need to specify either the page number and group (for standard parts) or the SA number (for special parts). The catalog on page 2 gives examples: for connecting rod use page 28 group 01 figure 25; for fuel injection pump use SA 2-SA 018338 figure 6. Understanding this system prevents ordering the wrong part, especially for items like the inlet manifolds or oil cooler that have multiple SA variants.

If you’re working on a TF42, TF44, or TF46 and need to order parts for the engine, this is the document to have on the bench. Access the Factory Manual now and keep it with the machine.