Part of the Yanmar Parts Manuals.
An engine in pieces on the stand raises questions nobody is around to answer: which undersize main bearing the reground crank takes, which nozzle assembly fits that holder, which O-ring seals the gear housing cover. This Yanmar parts catalog for the 3TNC80L-RB1 (SUM30) diesel settles them system by system, walking the cylinder block, crankshaft and piston, camshaft and driving gear, fuel injection pump, governor, cooling water system, and lubricating oil system through to the starting motor and generator.
Across 42 pages, every system gets a parts list matched to a numbered exploded view, so you can put an exact Yanmar part number on each piece you pull, down to gaskets, snap pins, and clamps. It even lists 0.25 undersize main and thrust bearings and closes with the optional gasket set and tools.
This is factory publication Y00B4731 in searchable PDF, in English, sized to live on the bench.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine 3TNC80L-RB1 | 1 | General Information |
| Cylinder Block | 2-3 | Block Assy, Cylinder, Plug, Bolt, Main Bearing, Bush, Camshaft, Gasket |
| Gear Housing | 4-5 | Housing Assy, Gear, Seal, Oil, Cap, LUB.OIL Supply, Gasket, O-Ring |
| Flywheel Housing & L.O. Sump | 6-7 | Repair Part |
| Cylinder Head & Bonnet | 8-10 | Viewed From a |
| Suc.Manifold & Air Cleaner | 11-12 | Manifold, Suction, Gasket, Heater, Air, Silencer, Air Cleaner Assy, Element |
| Exhaust Manifold & Silencer | 13-14 | Manifold, Exhaust, Gasket, Nut W/WASHER, Silencer, Stay |
| Camshaft & Driving Gear | 15-16 | Repair Part |
| Crankshaft & Piston | 17-18 | Repair Part |
| Lub. Oil System | 19-20 | Previous Model |
| Cooling Water System | 21-22 | Cylinder Head |
| Fuel Injection Pump | 23-26 | Classified Mark, Viewed From a |
| Fuel Injection Pipe | 27-28 | Valve Assy, F.INJECT, Nozzle Assy, Nut, Nozzle Case, Holder Assy, Nozzle |
| Fuel Pipe | 29-30 | To Feed Pump |
| Governor | 31-33 | Classified Mark |
| Engine Stop Device | 34-35 | Joint, Link, Bracket, Solenoid, Stop, Washer, Snap Pin |
| Starting Motor | 36-37 | Starter, Armature Assy, Bearing, Coil Assy, Field, Clutch Assy, Shaft, Pinion |
| Generator | 38-39 | Washer, Spring, Collar, Plate Assy, Stator, Flywheel Assy |
| Gasket Set (Optional) & Tool | 40-42 | Optional Parts |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Clamp size | 60 | p. 11 |
| Main Bearing Undersize | 0.25 | p. 2 |
| Thrust Bearing Undersize | 0.25 | p. 2 |
| O-Ring 1A P-type Size | 16.0 | p. 4 |
| Drain Plug Size | M22 | p. 6 |
| Stud M6x30 Plated | M6x30 | p. 8 |
| Valve Spring Quantity | 6 | p. 8 |
| Piston Pin Diameter | 23 | p. 17 |
| Circlip Size | 23 | p. 17 |
