Description

Yanmar TCR50 1990 Parts Catalog

If you’ve ever ordered a part for a Yanmar TCR50 1990 Parts Catalog based on a vague description or an aftermarket website and ended up with a fuel injection pump that doesn’t match the boost port, you know the headache. This is the factory catalog—92 pages of part numbers, exploded diagrams, and assembly references that Yanmar printed in 1990. No translations lost in the mail, no reprints from third parties who scanned something sideways. That’s why I keep a stack of these on the shelf next to the torque wrenches.

Yanmar TCR50 1990 Parts Catalog: What You Get in 92 Pages

You get the full Engine section for the TCR50, covering the 4TNE106-TB and 4TNV106-NTB powerplants. The CYLINDER BLOCK chapter is broken down by component groups, each with its own parts index. Every page lists the OEM reference, the quantity per assembly, and the model variant it fits. For example, the fuel injection pump/boost assembly shows part numbers like 4J2R-OT and 4J2R-DT2A with specific engine codes next to them. You match the code, you get the right pump. Period.

Cylinder Block and Engine Assembly Breakdown

The cylinder block section covers the block itself, liners, pistons, rings, bearings, and all internal hardware. Because this is an OEM parts catalog, you aren’t guessing which main bearing shell matches a 4TNE106-TB versus the 4TNV106-NTB. The diagrams show exactly which bolts go where. No need to cross-reference a generic Chilton page. You want the part that Yanmar shipped from the factory? It’s here.

One thing that catches guys who only use online parts lookups: the catalog lists part numbers in groups by revision date. You see a column marked “90.10.23” — that’s the print date for that drawing. If your engine has a later serial number, you check the next column. That level of detail saves you from ordering a pump that was superseded three months after your engine left the plant.

Two Engine Versions – 4TNE106-TB and 4TNV106-NTB

These are not the same block. The 4TNE106-TB is an indirect-injection, mechanically governed engine. The 4TNV106-NTB is a direct-injection variant with a different fuel system. The catalog separates them completely: each has its own CONTENTS and PARTS INDEX sections. If you mix up the injector nozzles between the two, you’ll get a misfire you’ll waste a morning diagnosing. Use the right index.

I’ve seen guys slap a 4TNE106 injection pump onto a 4TNV106 block because the bolt pattern looked the same. Then they wonder why the boost compensator doesn’t respond. This catalog shows you the part number difference on the page. Check the code: (A) 4J2R-OT vs (B) 4J2R-DT2A. Different pumps. Different part numbers. Don’t guess.

Need the Right Fuel Injection Pump Part Number?

The fuel injection pump/boost section lists multiple sub-variants: 4J2R-OT, 4J2R-DT2A, 4J2R-OT2P, 4J2R-DT2P, 4J2R-OT2F, 4J2R-DT2F. Each one has its own row in the table with reference numbers like GSNK-0001SC and 396Y-029666. You also get the boost compensator part numbers separately. If your TCR50 is throwing black smoke and you need a replacement boost diaphragm, you can find the exact Yanmar part without ordering three wrong ones first.

Why Factory Parts Indexes Beat Aftermarket Reproductions

Aftermarket catalogs often compress multiple engine families into one table to save paper. That leads to mismatches. This Yanmar catalog uses separate index pages for each engine variant—4TNE106-TB and 4TNV106-NTB have their own CONTENTS and then PARTS INDEX. You flip to the right section, find the part number, and order it. No cross-referencing a third-party website that might have copied the data from a faxed page. For related equipment, check the Ammann Yanmar B12 B17 1991 Parts Catalog – OEM Factory Specs”>Ammann Yanmar B12 B17 1991 Parts Catalog or the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs”>Yanmar YB271, B27 1994 Parts Catalog. You can also see the Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM”>Yanmar YB301 YB351 1991 Parts Catalog for larger chassis. For broader context on why OEM documentation matters, read the Automotive Industry Overview and Automotive Industry Overview”>Automotive Industry Overview.

FAQ

Does this catalog include part numbers for the fuel injection pump?

Yes. The Fuel Injection Pump/Boost section lists multiple part numbers with engine variant codes.

How do I use the parts index to find the correct cylinder head gasket?

Each engine variant (4TNE106-TB or 4TNV106-NTB) has its own PARTS INDEX at the end of the section. Look up “CYLINDER BLOCK” in the index, find the gasket entry, and note the part number and quantity. Verify the revision date column to ensure your engine’s serial number falls within the valid range. If your block has a later serial number than the catalog print date (90.10.23), check for a parts update bulletin separately. This method keeps you from ordering a gasket intended for an earlier cylinder block design that may have different coolant passage locations.

If you’re tired of returning mismatched parts, get the book that Yanmar engineers signed off on. Access the Factory Manual now and put the part numbers where they belong: in your parts bin, not in the return pile.