Part of the Yanmar Parts Manuals.
The injection pump internals are where a 4TNV98T parts order goes wrong: plungers, delivery valves, and governor components differ between the GGE build and the NSA and NSA2 builds, and guessing costs you the wrong element and a second teardown. This Yanmar parts catalog, publication Y00R5680-1, keeps the variants separate, with dedicated inner parts sections for each.
The rest of the 35 pages runs the whole engine, system by system: cylinder block, cylinder head, camshaft, crankshaft and piston, turbocharger, lubrication and cooling, fuel injection valve, starter, alternator, and the complete gasket set. Real numbers come straight off the tables, oil filter 123907-55800, air cleaner element 129935-12520, so you order once.
It downloads as a bookmarked English PDF, small enough at 0.78 MB to keep on a phone at the bench, and each of the 24 bookmarks drops you on the section you need while the engine is still on the stand.
Other edition of this manual
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-3 | Block Assy, Main Bearings, Plugs, Head Bolts, Head Gasket |
| Gear Housing (NSA/NSA2 & GGE Variants) | 4-5 | Gear Case Cover, Oil Seal, Oil Pump Assy, Ball Bearing, O-Rings, Tachometer Gear |
| Flywheel Housing & Oil Sump (NSA/NSA2 & GGE Variants) | 6-7 | Flywheel Housing, Oil Pan Assy, Drain Plug, Oil Seal |
| Cylinder Head & Bonnet | 8-9 | Cylinder Head Assy, Bonnet, Valves, Rocker Arm, Injector Nozzle Holder |
| Suction Manifold | 10-10 | Intake Air |
| Exhaust Manifold | 11-11 | Gasket, Heat Shield |
| Camshaft & Driving Gear | 12-12 | Camshaft Assy, Driving Gear, Cam Followers, Timing |
| Turbocharger (Turbine) | 13-13 | Turbocharger, Turbine Assy, Boost Control |
| Crankshaft & Piston | 14-14 | Crankshaft Assy, Piston, Connecting Rod, Main Bearings, Rings |
| Lubrication Oil System | 15-15 | Oil System, Oil Filter 123907-55800, Separator 119802-55700, Element 119802-55710 |
| Lubrication Oil Lines | 16-16 | Oil Lines, Cooler Hose, Oil Pressure |
| Cooling Water System | 17-17 | Water Pump, Thermostat, Coolant Hoses, Water Jacket |
| Fuel Injection Pump | 18-18 | Fuel Injection Pump Assy, Fuel Feed Pump, Injection Timing |
| Fuel Injection Valve | 19-19 | Injection Valve, Nozzle Holder, Nozzle Tip |
| Fuel Lines | 20-20 | Fuel Filter, Return Lines, Bleeding Screw |
| Starting Motor | 21-21 | Starter Motor, Solenoid, Drive Pinion, Ring Gear |
| Generator (Alternator) | 22-22 | Alternator, Regulator, Belt Tension |
| Gasket Set | 23-23 | Complete Gasket Set, Overhaul Kit, Seal Set |
| Fuel Injection Pump Inner Parts (NSA/NSA2) | 24-25 | Governor Inner Parts, Plunger, Delivery Valve, Pump Element |
| Fuel Injection Pump Inner Parts (GGE) & Governor | 26-27 | Governor Inner Parts GGE, Speed Control, Plunger Element |
| Engine Foot & Air Cleaner | 29-30 | Engine Foot Mounting, Air Cleaner 129933-12500, Outer Element 129935-12520 |
| Exhaust & Silencer | 31-32 | Exhaust Manifold Option, Silencer, Tall Pipe, Muffler |
| Oil Cooler & Radiator | 33-34 | Oil Cooler, Radiator, Cooling Circuit |
| Electric Parts | 35-35 | Electrical Components, Wiring Connectors, Sensors |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SPRING PIN dimensions | 6x12 mm (implied) | p. 3 |
| PARALLEL PIN dimensions | 8x16 mm (implied) | p. 4 |
| PACKING 3075 dimensions | 3075 (dimension, mm implied) | p. 4 |
