All 40 pages of this Yanmar 4TNE84T-BS Parts Catalog (OEM #Y00B6190) are built around one job: finding the exact part number for your industrial diesel engine the first time. Inside, you get exploded-view diagrams and OEM part numbers across every major system: cylinder block, gear housing, turbocharger, fuel injection pump and pipes, governor, starting motor, generator, and the complete lubrication and cooling circuits. Each assembly breaks all the way down to individual fasteners, seals, and hardware with precise component-level identification. Part entries carry exact specs like O-Ring 1A P-16.0 and Pipe 16×950, so you're matching the factory component, not guessing from a generic description. Wrong part ordered? That's a week you don't have. Bookmarked and keyword-searchable, so you jump straight to the right assembly, pull the number, and call your dealer with the answer already in hand.
What's Inside This Yanmar 4TNE84T-BS (B50W-1) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 1-2 | - |
| Cylinder Block | 3-4 | - |
| Gear Housing | 5-6 | Parallel Pins (Parallel Pin 8X16), Housing, Sump Assy, Lub.Oil, Seals and O-Rings (O-Ring 1A P-18.0, Case Assy, Oil Seal, Case, Seal, Oil), Flywheel |
| Flywheel Housing & Lub. Oil Sump | 7-8 | Bonnet Assy, Breather, Shelter, Baffle, O-Rings (O-Ring 1A: S-50.0, P-32.0, P 12.0), Gaskets (Gasket, Bonnet), Plate |
| Cylinder Head & Bonnet | 9-10 | Intake, Plug Pt3/8, Heater, Air, Air Cleaner Assy (Cover Assy, Valve, Unloader, Element, Element Assy, Inner), Manifold, Screw, Bolts (Bolt M 35 Plated) |
| Suc. Manifold & Air Cleaner | 11-12 | Exh.Manifold, Exhaust, Silencer, Support, Manifold, Bolts (Bolt M: 8X 65 Plated, 8X 85 Plated, 8X100 Plated, 8X 22), Gasket |
| Exhaust Manifold & Silencer | 13-14 | Exh. Manifold & Silencer Assembly, Rod, Push, Camshaft Assy, Idle Gear, Gear W/Bush, Bolt M 8X 45 Plated |
| Camshaft & Driving Gear | 15-16 | Protector, Heat, Hose, Rotor Set, Turbine, Housing Set, Blower |
| Turbocharger | 17-18 | Crankshaft Assy, Parallel Pin 8X16, Crankshaft, Spring Pin 4X10, Washer, Flywheel Assy, Ring Gear |
| Crankshaft & Piston | 19-20 | Lub. Oil, L.O. Pump, Bolt M 6X 25, Cooler, O-Ring 1A P-20.0, O-Ring 1A P-21.0, O-Ring 1A G-55.0 |
| Lub. Oil System | 21-22 | Bolt 10, Oil Pressure, L.O., Bolt 8, Bolt M 8X 10 Plated, Seal Washer 8S, Elbow, Lub.Oil Return |
| Lub. Oil Pipe | 23-24 | C.Water, C.W. Pump, Elbow Pt 1/4, Bolt M 8X 60 Plated, V-Belt, Fan, Cooling, Bolt W/Washer 6X 30 |
| Cooling Water System | 25-26 | F.I.Inject, Feed Pump, Cam Shaft Support, Key, Plunger W/Barrel, Barrel Locking, Retainer a, Spring Shoe |
| Fuel Injection Pump | 27-28 | F.Inject, Nozzle Assy, Nozzle Case, Holder Assy, Seat, Nozzle Spring, Inj. Pipe |
| Fuel Injection Pipe | 29-30 | Joint 12, Fuel Oil, Clamp 8, Fuel, Fuel Return, Gasket 12, Strainer Assy |
| Fuel Pipe | 31-32 | Packing, Link L=30, Link L=31, Link L=30.5, Weight Assy, Gov., Sleeve, Revol. Limit |
| Governor | 33-34 | Armature Assy, Washer Kit, Stopper Kit, Coil Assy, Field, Brush, Holder |
| Starting Motor | 35-36 | Rotor Assy, Starter Assy, Brush Assy, Regulator, Fan Side, Diode Assy, Condenser |
| Generator | 37-38 | Flex Horn, Liquid, Gasket |
| Tool | 39-40 | - |
Every system also includes assembly.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Plug size | PT1/4 | p. 2 |
| Bolt size | M8x14 | p. 2 |
| O-ring size | 1A P-16.0 | p. 4 |
| Spring pin size | 6x12 | p. 4 |
| Pipe size | 16x950 | p. 8 |
| Clamp size | 70 | p. 10 |
| Key size | 7x14 | p. 14 |
| Circlip size | 26 | p. 18 |
| V-belt type | A-36 | p. 24 |
| Cooling fan diameter | 370mm | p. 24 |
Yanmar 4TNE84T-BS (B50W-1) Common Problems This Manual Covers
Yanmar 4TNE84T-BS fuel injector nozzle part number unclear, multiple assemblies listed in catalog p. 29
Check the Fuel Injection Pipe exploded view on page 29. The nozzle assembly, nozzle case, holder assembly, nozzle spring, and injection pipe are listed as separate line items. Order each component individually by its PcNo, or verify whether a complete Nozzle Assy is available as a single part number before ordering individual pieces.
Manual Section: Fuel Injection PipeFuel filter and strainer part numbers needed, hard to locate in parts list p. 31
Inspect the Fuel Pipe section starting on page 31. The strainer assembly and fuel return components are listed there with individual PcNo entries. Cross-reference the clamp size 70 (page 10) when ordering inline fuel line hardware to confirm fitment with the existing fuel pipe routing.
Manual Section: Fuel PipeGlow plug or intake heater part number needed for cold-start repair order p. 11
Locate the Suc. Manifold & Air Cleaner section on page 11. The intake heater is listed alongside the air cleaner assembly, element, and unloader valve. Identify the correct PcNo for your serial number range before ordering; the air cleaner element inner and element assembly are separate line items.
Manual Section: Suc. Manifold & Air CleanerCooling water pump impeller or thermostat part number missing from order sheet p. 25
Pull the Cooling Water System diagram on page 25. The C.W. pump, elbow PT 1/4, V-belt type A-36, and 370mm cooling fan are all itemized there. Confirm the V-belt spec (A-36, page 24) before ordering to avoid receiving an incorrect belt with the pump kit.
Manual Section: Cooling Water SystemOil pump or lub. oil cooler part number needed after lubrication failure teardown p. 21
Reference the Lub. Oil System diagram on page 21. The L.O. pump, lub. oil cooler, and associated O-rings (1A P-20.0 and 1A P-21.0) are listed as individual parts. Order O-rings by exact size designation; substituting a similar size risks seal failure on reassembly.
Manual Section: Lub. Oil SystemExhaust manifold gasket or silencer part number needed for oil-leak or exhaust repair p. 13
Check the Exhaust Manifold & Silencer section on page 13. The exhaust manifold, silencer, support bracket, and gasket are listed with separate PcNo entries. Bolts are specified as M8x65, M8x85, M8x100, and M8x22 plated; order the correct length for each mounting position to avoid hardware mismatches.
Manual Section: Exhaust Manifold & SilencerFrequently Asked Questions
What are the replacement specifications for fuel filter?
The manual identifies the fuel filter element with part number 129100-55650. This element is listed with a quantity of 1. For detailed replacement specifications beyond the part number, refer to a service manual.
What are the replacement specifications for air filter?
The air cleaner assembly, part number 129418-12510, includes an air filter element, part number 129062-12560, and an inner element, part number 119005-12571. These part numbers are provided for replacement purposes.
How do you fix yanmar 4TNE84T-BS fuel injector nozzle part number unclear, multiple assemblies listed in catalog?
Check the Fuel Injection Pipe exploded view on page 29. The nozzle assembly, nozzle case, holder assembly, nozzle spring, and injection pipe are listed as separate line items. Order each component individually by its PcNo, or verify whether a complete Nozzle Assy is available as a single part number before ordering individual pieces.
How do you fix fuel filter and strainer part numbers needed, hard to locate in parts list?
Inspect the Fuel Pipe section starting on page 31. The strainer assembly and fuel return components are listed there with individual PcNo entries. Cross-reference the clamp size 70 (page 10) when ordering inline fuel line hardware to confirm fitment with the existing fuel pipe routing.
What do I get after purchasing this Yanmar 4TNE84T-BS, 4TNE84T-BS (B50W-1)?
You get a 40-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this Yanmar 4TNE84T-BS, 4TNE84T-BS?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Document Quality
This document is a high-quality scanned PDF with an OCR layer, which means you can search and copy the full text. All text throughout the document is crisp and clear, making it easy to read. The diagrams and illustrations are sharp line drawings with all labels distinctly legible, even at higher zoom levels. Pages are consistently clean, free from any scan artifacts, stains, or skewed content. There are no blank or filler pages included in this document.
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