Part of the Yanmar Parts Manuals.
Strip a 3TNC80L-RB to a bare block and every collar, washer, and O-ring has to go back exactly where Yanmar put it, with the right replacement on order before the head goes back on. This Yanmar parts catalog, publication Y00B4461-1, is what makes that possible: 35 pages of exploded views and numbered parts lists for the complete engine.
Coverage runs from the cylinder block, gear housing, and flywheel housing through the camshaft, crankshaft and pistons, cylinder head, fuel injection pump and pipes, governor, lube oil and cooling water systems, starting motor, and generator. It also flags previous-model parts and repair parts where the factory lists them. Whether the engine sits in a tractor, a genset, or on a stand in your shop, the part numbers are the same.
The bookmarked PDF is small enough to carry on a phone to the parts counter, so the rebuild does not stall waiting on a second shipment because the first number was a guess.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 1 | Small Vertical (B), Tnc |
| Cylinder Block | 2-3 | Cylinder Block Assy, Main Bearing, Thrust Bearing, Camshaft Bush, Head Gasket |
| Gear Housing | 4-5 | Gear Housing Assy, Oil Seal, Lub. Oil Supply Cap, Gears Housing Flange, Hydraulic Oil Pump Cover, Gasket, Knock Pipe, Blind Cover |
| Flywheel Housing & L.O Sump | 6-7 | Flywheel Housing, Flywheel Cover Cap, Lub. Oil Sump Spacer, Oil Sump Assy, Oil Seal Case Assy, Oil Seal |
| Cylinder Head & Bonnet | 8-9 | Cylinder Head Assy, Suction Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap, Rocker Support Assy |
| Suc/Exh Manifold | 10-11 | Suction Manifold, Gasket, Exhaust Manifold, Exhaust Manifold Gasket, Air Heater |
| Camshaft & Driving Gear | 12-13 | Camshaft Assy, Thrust Bearing, Camshaft Gear, Idle Gear Shaft, Gear W/ Bush, Idle Gear Bush, Tappet, Push Rod |
| Crankshaft & Piston | 14-15 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel W/ Gear, Ring Gear, Piston W/ Rings, Ring Set, Connecting Rod Assy |
| Lub. Oil System | 16-17 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Lub. Oil Dipstic, Dipstick Guide, Gasket, Oil Inlet Pipe Assy, Strainer Bracket, Filter 90X80L |
| Cooling Water System | 18-19 | Cooling Water Pump, Cooling Water Pump Gasket, V-Belt, V-Pulley, Cooling Fan, Spacer, Thermostat Cover, Gasket |
| Fuel Injection Pump | 20-22 | Camshaft, Thrust Ball Bearing, Cam Shaft Support, Plunger W/ Barrel, Retainer a, Plunger Spring Shoe, Plunger Spring |
| Fuel Injection Pipe | 23-24 | Fuel Injection Valve Assy, Fuel Injection Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer |
| Fuel Pipe | 25-26 | Fuel Strainer Assy, Taper Valve, Taper Valve Spring, Lever, Strainer Cup, Retaining Ring, Spring, Element |
| Governor | 27-28 | Governor Case, Governor Case Gasket, Governor Case Cover, Case Cover Gasket, Link, Governor Weight Assy, Sleeve, Control Shaft Assy |
| Starting Motor | 29-30 | Starter, Armature Assy, Bearing, Field Coil Assy, Brush, Rear Cover, Brush Holder Assy, Brush Spring |
| Generator | 31-32 | Collar, Plate Assy, Stator, Coupler, Flywheel Assy, Adjuster |
| Gasket Set (Optional) & Tool | 33-35 | Gasket Set, Head Gasket, Bonnet Gasket, Exhaust Manifold Gasket, Lub. Oil Pump Gasket, Cooling Water Pump Gasket, Flex Horn, Liquid Gasket |
Every system also includes an exploded view and a parts list.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Parallel Pin Size | 8x16 mm | p. 6 |
| Plug/Drain Plug Thread Size | M22 | p. 6 |
| Pipe Plug Thread Size | PT1/4 | p. 8 |
| Nut Thread Size & Pitch | M8xP1.0 | p. 8 |
