Description

Sperry New Holland OM 402 Parts Catalog – Factory Parts Breakdown for the 900.004 Engine

If you are rebuilding a Mercedes-Benz OM 402 engine in a Sperry New Holland machine, the last thing you need is a generic parts list from some third-party website. I have seen guys order a cylinder head gasket set based on a Chilton cross-reference and end up with the wrong part. That downtime costs money. This Sperry New Holland OM 402 Parts Catalog gives you the actual factory diagrams and part numbers. No guessing. No aftermarket shortcuts. Every assembly is broken down by OEM group: crankcase, oilsump, cylinder head, timing, injection pump, fuel filter, manifolds, starting motor, oil pump, oil filter, and water pump. The index runs across five languages. You get 39 pages of verified data. That is what keeps a job on schedule.

Cylinder Head and Cover: Page 9 – Exploded View with Part Numbers

The cylinder head section (page 9) shows every bolt, washer, valve guide, and gasket associated with the OM 402. You get the factory indexing so you can order from Sperry New Holland directly. Need the fuel injector line clamps? The injection pump section on page 13 covers it. The diagram includes reference numbers that tie to a parts table with OEM numbers. That means you are not relying on an aftermarket cross-reference that might use a superseded number. If the head gasket has a specific thickness or the valve cover uses a different seal, it’s all there. I have used this catalog to source a cylinder head bolt set that the local parts house swore was discontinued. The factory number was still active.

Fuel Filter Layout and Part Numbers – Page 15

Fuel system parts are notorious for being misidentified. Page 15 details the fuel filter assembly including the mounting bracket, filter head, and lines. The OM 402 uses a specific spin-on filter base, and if you grab the wrong one, you will have a leak. The catalog shows the exploded view with the correct seal rings and banjo bolts. When you are ordering a fuel filter kit, you want the exact part number that matches the canister and the water separator (if equipped). This page gives you that. No guessing which double-page spread matches your serial number – it’s all in the 39 pages.

3 Reasons to Use an OEM Parts Catalog Instead of Aftermarket Lists

First, the diagrams are drawn from the actual production drawings. The cylinder wall thickness, the oil pan baffle shape, the water pump impeller clearance – all reproduced from what came off the line. Second, the part numbers match Sperry New Holland inventory. That means you can walk into a dealer or order online with confidence that the number will not bounce back as “interchange unknown”. Third, the index on page 27 lets you cross-reference in English, French, German, Dutch, and Italian. If your machine has European heritage, you can find the part under its original language. That is not fluff – it saves you from buying a part that looks right but is dimensionally wrong.

Does This Catalog Cover the Timing Case and Injection Pump?

Yes – the timing section on page 11 shows the chain, gears, and cover. The injection pump page 13 has the pump assembly and drive coupling. If you are rebuilding the front of the engine, you need these pages open on your bench. The OM 402 uses a gear-driven injection pump, and the timing marks are critical. The catalog does not give you installation torque values – that is in the service manual – but it does give you the correct part numbers for the timing chain tensioner, the pump mounting gasket, and the drive gear. If you are replacing the injection pump, you need to see how the fuel lines connect; page 13 shows the layout with the delivery pipes and return line. A common mistake is ordering the wrong seal kit because the parts book skips a variation. This catalog has the variations listed by serial number range.

Index: Fast Part Lookup in Five Languages – Page 27

The index is printed in English, French, German, Dutch, and Italian. That is not marketing fluff – it means if you have a machine imported from Europe, you can still find the part number using the original language label. The index on page 27 is organized alphabetically within each language. I have used it to find a “Kurbelgehäuse” when the English term “crankcase” was not on the diagram because of a translation glitch. The index saved me 20 minutes of flipping pages. For a 39-page catalog, that is fast. You also get the page reference and the grid location (B 2, B 4, etc.) so you can jump directly to the drawing. Every mechanic should have this index memorized for the engine they work on most.

One more thing: do not trust a third-party PDF that claims to have this content but has a blurry scan or missing pages. The original file for this Sperry New Holland OM 402 Parts Catalog is a clean digital copy with all 39 pages intact. If you want to see similar documentation, check out Sperry New Holland OM 352 Parts Catalog – 48 Pages of Factory Parts Data or Sperry New Holland OM 352 Engine Parts Catalog. For the six-cylinder version, grab Sperry New Holland OM 401 Engine Parts Catalog. And if you need broader context on how these engines fit into the machinery market, read the Automotive Industry Overview and the Automotive Industry Overview.

Can I use this catalog to order parts for the OM 402 in my truck?

Only if the engine is in a Sperry New Holland machine.

How do I know if the part I need is listed?

The catalog covers the entire engine: cylinder head, crankcase, oil sump, fuel system, injection pump, manifolds, starting motor, alternator, oil pump, oil filter, water pump. Each section has an exploded diagram with reference numbers and a table of part numbers. If your component is not in those 39 pages, it is not an OEM engine part – it may be a chassis or attachment part. You would need the machine’s main parts catalog for those.

So if you are tearing down a Sperry New Holland OM 402, do yourself a favor. Access the Factory Manual and keep it on your tablet while you work.