Part of the Yanmar Parts Manuals.
Halfway through a 4TNE98 teardown, with the crankpin bearings out and the ring lands cleaned up, the next hour goes to matching what you measured against part numbers. Guess wrong and the rebuild sits on the stand for another week waiting on a second order.
This is Yanmar publication Y00R4580, the factory parts catalog for the 4TNE98-SA and 4TNE98-G1A diesel engines: 21 pages organized by system, from cylinder block, cylinder head and bonnet, camshaft, and crankshaft and piston through the fuel injection pump, injection valves, governor, cooling water system, and feed pump, with bookmarks for each section. It lists the 0.25 undersize main bearings, the 80X80L lube oil filter, and a complete gasket set down to O-rings and seal washers.
Working alone with nobody to ask, the correct part number is the answer. Buy the PDF once and it stays on your bench as long as this engine does.
Other edition of this manual
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 1 | Cylinder Block Assembly, Main Bearings, Camshaft Bushings, Head Bolts, Cylinder Head Gasket |
| Gear Housing | 2 | Gear Housing Cover, Lube Oil Pump, Tachometer Gear Unit, Oil Supply Cap, Seals and O-Rings |
| Flywheel Housing & Oil Sump | 3 | Flywheel Housing, Oil Sump Assembly, Drain Plug, Oil Seal, Flywheel Cover Cap |
| Cylinder Head & Bonnet | 4 | Cylinder Head Assembly, Rocker Arm Shaft, Valve Guides, Intake/Exhaust Valves, Valve Springs, Nozzle Seats, Bonnet Gasket |
| Suction Manifold | 5 | Intake Manifold, Manifold Gasket, Air Heater, Earth Cord |
| Exhaust Manifold | 6 | Exhaust Gasket, Stud Bolts, Manifold Nuts |
| Camshaft & Driving Gear | 7 | Camshaft Assembly, Tappets, Push Rods, Camshaft Gear, Idle Gear Assembly, Idle Shaft, Fi-P Gear |
| Crankshaft & Piston | 8 | Crankshaft, Flywheel Assembly, Ring Gear, Pistons with Rings, Piston Pins, Connecting Rods, Crankpin Bearings, V-Pulley |
| Lub. Oil System | 9 | Oil Dipstick, Lube Oil Filter 80X80L, Oil Pressure Switch, Lube Oil Pipe, O-Rings, Seal Washers |
| Cooling Water System | 10 | Water Pump, Thermostat, Water Temperature Switch |
| Fuel Injection Pump | 11-12 | Fuel Injection Pump Assembly, Delivery Valves, Plungers, Pump Housing, Fuel Injection Timing |
| Fuel Injection Valve | 13 | Fuel Injection Nozzle, Nozzle Holder, Pressure Spring, Nozzle Cap Nut, Injection Valve Assembly |
| Fuel Line | 14 | Fuel Supply Pipes, Fuel Return Lines, Fuel Filter, Fuel Line Fittings and Joints |
| Engine Stop Device | 15 | Engine Stop Solenoid, Stop Device Assembly, Fuel Shutoff Mechanism |
| Starting Motor | 16 | Starting Motor Assembly, Pinion Gear, Brush Set, Magnetic Switch, Motor Housing |
| Generator | 17 | Alternator Assembly, Rotor, Voltage Regulator |
| Gasket Set | 18 | Complete Gasket Set, Cylinder Head Gasket, Manifold Gaskets, O-Rings and Seal Washers |
| Governor | 19-20 | Mechanical Governor Assembly, Governor Springs, Flyweights, Control Lever, Governor Housing |
| Feed Pump | 21 | Fuel Feed Pump Assembly, Pump Valves, Priming Handle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Thermo switch operating temperature | 110 C | p. 10 |
| Plug Size | PT3/8 | p. 1 |
| Main Bearing Undersize | 0.25 | p. 1 |
| O-Ring Size | P20 | p. 2 |
| Drain Plug Size | M22 | p. 3 |
| Nut Size | M8XP1.0 | p. 4 |
| Circlip Size | 18 | p. 4 |
| Oil Filter Size | 80X80L | p. 9 |
| Thermo Switch Temperature | 110 C | p. 10 |
