Forty-two pages, one engine: this Yanmar 3TNC80L-RB1, SUM30 Parts Catalog (OEM #Y00B4731) maps every component of the 3-cylinder diesel from cylinder block to generator, giving you the factory parts reference for accurate ordering and identification. Open to any of the 19 system sections and you get a clean exploded view paired with a numbered parts list: gear housing, flywheel housing, fuel injection pump, governor, engine stop device, starting motor, and more. Identify the exact part number before you call the dealer and stop second-guessing what fits. Confirm your main bearing undersize at 0.25 mm; air cleaner hose clamp sits at size 60. No more hunting through the dealer's parts fiche. Bookmarked by system; open your tablet, search by keyword, and pull the right part number before you walk to the counter.
What's Inside This Yanmar 3TNC80L-RB1, SUM30 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 |
| Knock Pipe Length | 18 | p. 4 |
| O-Ring 1A P-type Size | 16.0 | p. 4 |
| Bolt M8x12 Plated | M8x12 | p. 4 |
| Parallel Pin Size | 8x16 | p. 6 |
| 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 |
Yanmar 3TNC80L-RB1, SUM30 Common Problems This Manual Covers
Yanmar 3TNC80L-RB1 fuel injection nozzle part number unclear, need correct replacement for rough running and white smoke p. 27
Check the exploded view starting at page 27 under Fuel Injection Pipe. The nozzle holder assembly, nozzle case, and nozzle assembly are listed separately — order each by its individual part number. Verify the nozzle assembly part number against your serial number range before ordering, as classified mark variants exist in the fuel injection pump section on page 23.
Manual Section: Fuel Injection PipeNeed correct fuel filter and feed pump parts for engine won't start after long storage p. 29
Locate the Fuel Pipe section starting at page 29. The feed pump connection and associated fuel line components use clamps sized 12 mm and 8 mm — confirm you order clamps to those specs. Cross-reference part numbers in the parts list before ordering; fuel pipe and filter connections are itemized separately from injection pump components on page 23.
Manual Section: Fuel PipeCooling water pump impeller and thermostat part numbers needed for overheating diagnosis p. 21
Turn to the Cooling Water System exploded view on page 21. Water pump components, impeller, and thermostat are listed individually with separate part numbers. The cooling drive uses a V-Belt type A-39 — include that in your parts order if the belt shows cracking or glazing. Verify each part number in the diagram before sourcing.
Manual Section: Cooling Water SystemGlow plug part number and air cleaner element identification for hard cold-weather starting p. 11
Locate glow plug part numbers in the Cylinder Head & Bonnet section on page 8 — the parts list covers head-mounted components including 6 valve springs and associated hardware. For the air cleaner element, go to page 11 under Suc.Manifold & Air Cleaner; the air cleaner assembly and element are listed separately with distinct part numbers. Order both by part number to avoid substitution errors.
Manual Section: Suc.Manifold & Air CleanerOil filter and lubrication system gasket part numbers needed after bearing damage or oil pressure drop p. 19
Reference the Lub. Oil System parts list starting on page 19. Oil filter, oil supply components, and associated gaskets are itemized there. For main bearing replacement, the Cylinder Block parts list on page 2 shows main bearing undersize at 0.25 mm — confirm whether you need standard or undersize shells before ordering. Crankshaft and piston components are on page 17.
Manual Section: Lub. Oil SystemExhaust manifold gasket and motor mount part numbers needed for vibration and exhaust leak repair p. 13
Find exhaust manifold gaskets and hardware in the Exhaust Manifold & Silencer section on page 13; the parts list includes manifold, gasket, nuts with washers, silencer, and stay as separate line items. For motor mounts, check the Flywheel Housing & L.O. Sump section on page 6 — the M22 drain plug and parallel pin (8x16 mm) are also listed there as reference points for ordering adjacent hardware.
Manual Section: Exhaust Manifold & SilencerFrequently Asked Questions
What are the replacement specifications for fuel filters?
The manual identifies the fuel strainer assembly with part number 119810-55621 and its element with part number 119810-55650. However, it does not provide specific replacement intervals or procedural specifications for these parts.
What are the replacement specifications for fuel injection nozzle?
The manual lists the fuel injection valve assembly as part number 719807-53100 (quantity 3) and the fuel injection nozzle assembly as part number 119807-53000 (quantity 3). Specific replacement intervals or detailed procedural specifications are not provided.
How do you fix yanmar 3TNC80L-RB1 fuel injection nozzle part number unclear, need correct replacement for rough running and white smoke?
Check the exploded view starting at page 27 under Fuel Injection Pipe. The nozzle holder assembly, nozzle case, and nozzle assembly are listed separately — order each by its individual part number. Verify the nozzle assembly part number against your serial number range before ordering, as classified mark variants exist in the fuel injection pump section on page 23.
How do you fix need correct fuel filter and feed pump parts for engine won't start after long storage?
Locate the Fuel Pipe section starting at page 29. The feed pump connection and associated fuel line components use clamps sized 12 mm and 8 mm — confirm you order clamps to those specs. Cross-reference part numbers in the parts list before ordering; fuel pipe and filter connections are itemized separately from injection pump components on page 23.
What format is this manual in?
This is a 42-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Document Quality
This document is a mix of scanned image pages and pages with an OCR text layer. You can search and copy text from the OCR pages, but text within diagrams is part of the image and not searchable. Digital text is crisp and easy to read, while text in diagrams is rasterized but remains readable. All diagrams are raster images, clear enough for identification, with legible labels. The pages are clean, free of scan artifacts or notable blank pages.
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