Description

Yanmar 4TNV98T-GGE Parts Catalog – OEM Factory Specs

You’ve got a Yanmar 4TNV98T-GGE Parts Catalog sitting in front of you, and you’re asking: “Why do I need a parts catalog when I already have a service manual?” Because the service manual tells me how to put it together. The parts catalog tells me what actually goes in there. I’ve spent too many afternoons chasing a part number that doesn’t match, or worse, ordering a piston that’s 0.25mm oversize when the block is already bored. This catalog stops that guesswork cold. 35 pages of factory-fresh diagrams, genuine Yanmar part numbers, and exploded views that show you exactly which bolt goes where. No reprints, no third-party scanning artifacts. Straight from the manufacturer’s print.

5 Critical Sections You’ll Use First

Flip to page 3 for the Cylinder Block assembly. The first thing I check is the main bearing set (part 729900-02800) and the thrust bearing options. The catalog lists undersize and oversize parts — US=0.25 and OS=0.25 — so you can order the right bearing without pulling the crank a second time. Page 4 covers the gear housing, including the oil seal (129900-01780) and the gear case cover. If you’re swapping a camshaft, the Camshaft & Driving Gear section (fig. 9) has the timing gear and thrust plate part numbers. The Cooling Water System (fig. 14) gives you the water pump and thermostat housing bits. Fuel Injection Valve (fig. 16) covers injector nozzles and holders. Every exploded view includes the reference part number, even the spring pins and O-rings. You don’t need to hunt through three websites.

How the Parts Catalog Saves Your Wallet

If you’re rebuilding a 4TNV98T-GGE for a skid steer or irrigation pump, ordering the wrong part once eats your budget. This catalog gives you the exact factory part number — not a “compatible” aftermarket number that might be a hair off. You can cross-reference across variants too. The catalog covers multiple models: 4TNV98T-NSA, 4TNV98T-NSA2, and your 4TNV98T-GGE. The cylinder block table shows which parts fit which variant. For example, the cylinder block assembly (729908-01560) fits all three, but the gear housing (fig. 3) is specific to the GGE. That’s the kind of detail that keeps you from buying a gear cover that won’t bolt up. Pair this catalog with the service manual and you’ll have both the procedure and the part number. Check out related manuals for other Yanmar models: Ammann Yanmar B12 B17 Parts Catalog, Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs, and Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM.

OEM Data vs Aftermarket Junk

Aftermarket parts catalogs love to group parts into “fits” lists that leave out critical details — like which side the fuel injector line goes, or whether the camshaft bushing is a press-fit or bolt-on. This Yanmar catalog doesn’t do that. Every part number is cross-referenced with the original engineering drawings. The governor inner parts for the GGE (fig. 24) are separated from the NSA versions. The lubrication oil line section (fig. 13) shows the exact routing clips. If you’re not using OEM documentation, you’re relying on someone else’s interpretation. For context on why OEM specs matter in the broader Automotive Industry Overview, the standard for original equipment documentation is non-negotiable. Automotive Industry Overview.

Cylinder Block and Camshaft Details

The Cylinder Block section lists the camshaft bush (129900-02410), cylinder head bolts (129900-01200), and the gasket set (fig. 20). The Camshaft & Driving Gear section (fig. 9) shows the camshaft gear and thrust plate. Notice the part numbers for the cylinder head gasket (129907-01331) — it’s specific to the GGE. Don’t try to substitute. The Valve section? The Fuel Injection Valve (fig. 16) includes the valve body, nozzle assembly, and seating washers. Each component has a level code (A, B, C) to indicate which variant it belongs to. If you’re working on the Cooling system, the water pump gasket and housing bolts are on fig. 14. The Fuel Injection Pump inner parts (fig. 23) cover the plunger and barrel for the GGE. This catalog doesn’t skip the little things — even the spring pins and plugs have part numbers.

Cooling and Fuel Systems: Parts Breakdown

The Cooling Water System (fig. 14) shows the water pump assembly, thermostat, and hoses. Part numbers for the water pump gasket (24351-030750 packing) are right there. The Fuel Injection Pump (fig. 15) and Fuel Line (fig. 17) give you every banjo bolt and washer. The Fuel Injection Valve (fig. 16) lists the valve assembly with a note: “Remarks (1) OPTIONAL PART.” That optional marking matters when you’re ordering — if the part is optional, your engine might not need it. Don’t buy it unless you’re replacing an existing one. The catalog uses imperial equivalents? No, everything is metric as supplied by Yanmar. But you can convert: 1.0 mm is about 0.0394 in. For your workbench, a metric thread gauge is required. If you’re a home garage guy, get a good set of metric taps before you start.

FAQ – Yanmar 4TNV98T-GGE Parts Catalog

Does this parts catalog include torque specs?

No. This is a parts catalog, not a service manual. Torque specs belong in the repair manual.

Can I use this to rebuild my 4TNV98T-GGE engine completely?

Yes and no. You can identify every part you’ll need — pistons, rings, bearings, gaskets, even the camshaft and valve components. But for procedures like cylinder head bolt tightening sequences or bearing clearance measurements, you need the Yanmar service manual. This catalog gives you the shopping list; the service manual gives you the recipe. Together they’re a complete rebuild package. Many DIYers buy both, and I recommend it. The part numbers here are 100% OEM — no aftermarket substitutions — so you can order directly from Yanmar or any dealer with confidence.

Is this catalog available in English?

Yes. The catalog has English, Danish, German, and French. The original file name includes “en-da-de-fr”. All part numbers and descriptions are in English.

Does it cover the 4TNV98T-GGE only, or other variants?

It covers the 4TNV98T-GGE specifically, but many sections include part numbers for the 4TNV98T-NSA and 4TNV98T-NSA2 variants as well. Check the column headers in each figure — they show which part fits which model.

That’s the straight truth. 35 pages of factory Yanmar part numbers, cross-referenced diagrams, and variant-specific breakdowns. If you’re rebuilding, repairing, or just stocking spares, this catalog saves you from ordering the wrong piece. Access the factory manual now and get back to turning wrenches without the part-number guessing game.