Part of the Yanmar Parts Manuals.
Somewhere between pulling the head and phoning in the parts order, every 4TNV98CT-WTB rebuild stalls on the same question: which O-ring, which camshaft bush, which cap bolt does Yanmar actually call for. This parts catalog (Yanmar publication YOOF2161, spec P-TB290EBA) answers it with exploded views and factory part numbers across 50 pages, from the cylinder block through the gasket set.
Every major group gets its own figure: crankshaft and piston, camshaft and driving gear, the turbocharger, the fuel supply pump and injection valves, the DPF and EGR hardware, starter, alternator, and ECU. When you are alone at the bench with the engine in pieces and nobody to ask, matching a worn part to its exact number is the difference between one order and three.
It downloads as a PDF, prints figure by figure, and once bought it is yours to keep for as long as you run this engine.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 6-7 | Block Assy Cylinder, Plug, Bolt Metal Cap, Bush Camshaft, Bearing Thrust, Gasket Cyl Head |
| Gear Housing | 8-9 | Case Gear, O-Ring, Pump Assy Oil, Cover Filler, Pipe, Seal Oil |
| Flywheel Housing & Oil Sump | 10-11 | Housing Flywheel, Seal, Sump Assy Oil, Plug Drain, Sensor Flywheel Rev |
| Cylinder Head & Bonnet | 12-13 | Head Assy Cylinder, Valve, Rocker Arm, Bonnet Assy, Breather, Plug Glow |
| Suction Manifold | 14-15 | Manifold Assy Intake, Sensor Air Temp, Duct Intake, Collector Assy, EGR Valve, Throttle Body |
| Exhaust Manifold | 16-17 | Manifold Exhaust, Sensor Exh Temp, Pipe Exh Pressure, EGR Cooler, EGR Valve, Clamp Assy |
| Diesel Particulate Filter (DPF) | 18-19 | DPF Assy, Sensor Exh Temp, Case DOC, Silencer DPF, Stiffener DPF, Sensor Unit Pressure |
| Camshaft & Driving Gear | 20-21 | Tappet, Shaft Assy Cam, Gear Camshaft, Pulser Cam Gear, Gear Assy Idle, Gear Supply Pump |
| Turbine | 22-23 | Turbocharger, Gasket, Stud, Nut |
| Crankshaft & Piston | 24-25 | Crankshaft Assy, Gear, Pin, V-Pulley, Flywheel Assy, Piston Assy, Ring Assy, Rod Assy |
| Lub.Oil System | 26-27 | Cooler Assy, O-Ring, Bracket, Pipe, Dipstick, Filter |
| Lub.Oil Line | 28-29 | Switch, Pipe Assy, Retainer, Valve Assy, Nozzle, Pin |
| Cooling Water System | 30-31 | Pump Assy, V-Pulley, V- |
| Fuel Supply Pump | 32-33 | |
| Fuel Injection Valve | 34-35 | |
| Fuel Line | 36-37 | |
| Starting Motor | 38-39 | Starter, Armature Assy, Coil Assy, Switch Assy, Pinion Assy, Clutch Assy |
| Generator | 40-41 | Alternator, Adjuster, Spacer, Relay |
| Electronic Control Unit (ECU) | 42-43 | |
| Electric Parts | 44-45 | Bracket, Harness, Connector, Boot, Band |
| Gasket Set | 46-50 | Packing, Gasket, Seal, O-Ring, Driver, Wrench |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 4TNV98CT-WTB (Common-Rail Diesel, DPF+ECU) | ||
| Takeuchi P-TB290EBA / TB290 | ||
| Parts Catalog | ||
| YOOF2161 | ||
| 50 | ||
| Fuel Injection Valve (p.34), Lub Oil Cooler/Filter (p.26), DPF Assembly (p.18) |
