Part of the Yanmar Parts Manuals.
Tracking down exact replacement components for your engine is simple with this 35-page Yanmar 3TNC80L-RB, Y00B4461 parts catalog PDF. Inside, you get complete exploded views breaking down the entire cylinder block, gear housing, and fuel injection pump assembly. Every section provides detailed component lists showing exact factory part numbers and hardware cross-references for the cooling water system, governor, and starting motor. Always verify your hardware orders using factory dimensions, like the M22 drain plug thread size and the 8x16 mm parallel pins required for the flywheel housing. Ordering the wrong component kills your shop's uptime and wastes valuable hours. Download this bookmarked file directly to your phone or tablet, find the exact part number instantly, and get your equipment running again.
What's Inside This Yanmar 3TNC80L-RB, Y00B4461 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 |
Yanmar 3TNC80L-RB, Y00B4461 Common Problems This Manual Covers
Need Yanmar 3TNC80L-RB main bearing part numbers after engine knock and rapid bearing wear p. 2
Inspect the exploded view on page 2 to identify replacement bearings. Locate the correct part number for the 0.25 mm undersize main bearing option. Match the numbers against your serial plate to order the correct components for your block rebuild.
Manual Section: Cylinder BlockCan't identify the correct drain plug part number for the oil pan after finding a leak p. 6
Review the parts list on page 6 to find the exact M22 thread size drain plug for the sump assembly. Check the surrounding diagram for the matching sealing washer part number to ensure a perfectly tight seal when installing the new plug.
Manual Section: Flywheel Housing & L.O SumpTrying to find cylinder head pipe plug part numbers during a complete top end rebuild p. 8
Examine the cylinder head diagram on page 8 to locate the correct replacement plugs. Find the exact part number for the PT1/4 thread size pipe plug. Cross-reference the required quantities in the index before ordering replacements for your engine.
Manual Section: Cylinder Head & BonnetNeed replacement sealing components for the front gear housing to fix a severe oil leak p. 4
Check the gear housing parts breakdown on page 4. Identify the correct part numbers for the 16.0 mm and 32.0 mm diameter O-rings required for the assembly. Ensure you order the exact quantities listed in the right-hand column to prevent future leaks.
Manual Section: Gear HousingFrequently Asked Questions
How do you fix need Yanmar 3TNC80L-RB main bearing part numbers after engine knock and rapid bearing wear?
Inspect the exploded view on page 2 to identify replacement bearings. Locate the correct part number for the 0.25 mm undersize main bearing option. Match the numbers against your serial plate to order the correct components for your block rebuild.
How do you fix can't identify the correct drain plug part number for the oil pan after finding a leak?
Review the parts list on page 6 to find the exact M22 thread size drain plug for the sump assembly. Check the surrounding diagram for the matching sealing washer part number to ensure a perfectly tight seal when installing the new plug.
How do you fix trying to find cylinder head pipe plug part numbers during a complete top end rebuild?
Examine the cylinder head diagram on page 8 to locate the correct replacement plugs. Find the exact part number for the PT1/4 thread size pipe plug. Cross-reference the required quantities in the index before ordering replacements for your engine.
How do you fix need replacement sealing components for the front gear housing to fix a severe oil leak?
Check the gear housing parts breakdown on page 4. Identify the correct part numbers for the 16.0 mm and 32.0 mm diameter O-rings required for the assembly. Ensure you order the exact quantities listed in the right-hand column to prevent future leaks.
How quickly can I access this manual after buying?
Immediate download of the complete 35-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Yanmar 3TNC80L-RB, Y00B4461 Parts Catalog printable?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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