Part of the Yanmar Parts Manuals.
Hold a worn injection pump plunger from a 4TNE98 next to a new one and your eyes will not tell them apart; the part number will. This catalog is Yanmar publication Y00B5472 for the 4TNE98-BV engine, listed in its VIO70 application, so before you order anything you can confirm it matches the engine on your stand.
The 40 pages break the engine into thirteen bookmarked sections, from Cylinder Block and Crankshaft & Piston through the Lub. Oil System, Cooling Water System, Fuel Injection Pump, Governor, and Fuel Injection Valve, each one itemizing the assemblies, gaskets, seals, and hardware that go back together in that group.
Guessing at a bearing shell or a nozzle shim costs real money: the wrong part on the bench, another week of downtime, sometimes a second teardown. Buy the PDF once and it stays yours for the life of this engine.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Block Assy, Cylinder, Plug, Bolt, Bush, Bearing Assy, Gasket |
| Gear Housing | 5-6 | Cover, Seal, Pump Assy, Lub. Oil, O-Ring, Bolt, Nut |
| Flywheel Housing & Lub. Oil Sump | 7-8 | Housing, Flywheel, Sump Assy, Oil, Drain Plug, Seal, Bolt, Parallel Pin |
| Cylinder Head & Bonnet | 9-10 | Head Assy, Cylinder, Valve, Spring, Seal, Support Asy, ROCK.ARM, Gasket |
| Suc. Manifold | 11-12 | Manifold, Int, Gasket, Air Heater, Bolt |
| Exh. Manifold & Silencer | 13-14 | Manifold, Exhaust, Gasket, Bolt, Stud, Nut, Silencer |
| Camshaft & Driving Gear | 15-16 | Camshaft Assy, Gear, Tappet, Rod, Push, Shaft, Idler, Bush |
| Crankshaft & Piston | 17-18 | Crankshaft Comp, Piston W/RING, Rod Assy, Connecting, Flywheel Assy, Gear, Bearing, Pin |
| Lub. Oil System | 19-20 | Dipstick, Filter, Pipe Assy, Oil Pressure Switch, O-Ring, Seal Washer |
| Cooling Water System | 21-23 | Water Pump, Pulley, V-Belt, Fan, Thermostat, Gasket |
| Fuel Injection Pump | 24-26 | Plunger, Delivery Valve, Tappet, Control Rack, Lever, Shim |
| Governor | 27-28 | Lever, Spring, Control Rack, Flyweight Assy, Shim, Camshaft |
| Fuel Injection Valve | 29-40 | Fuel Valve, Nozzle, Nozzle Holder, Nozzle Spring, Shim Pack, Injection Pipe |
