Part of the Yanmar Parts Manuals.
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 Flange, Gear Case Assy, Oil Seal, Lub. Oil Supply Cap, Hydraulic Oil Pump Cover, Gasket, Knock Pipe, Retainer |
| Gear Housing | 5-6 | Flywheel Housing, Flywheel Cover Cap, Lub. Oil Sump Assy, Oil Sump, Knock Pipe, Oil Seal Case Assy, Oil Seal |
| Flywheel Housing & Lub. Oil Sump | 7-8 | Bonnet Assy, Breather Cover, Shelter Plate, Breather Baffle, Bonnet Gasket, Lub. Oil Supply Cap, Pipe 16X, Knob |
| Cylinder Head & Bonnet | 9-10 | Intake Manifold, Gasket, Air Heater, Air Cleaner Hose, Air Cleaner Assy, Mark, Cover Assy, Unloader Valve |
| Suc. Manifold & Air Cleaner | 11-12 | Exhaust Manifold Gasket, Exhaust Manifold, Silencer, Silencer Support |
| Exhaust Manifold & Silencer | 13-14 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idle Gear Shaft, Gear w/ Bush, Idle Gear Bush |
| Camshaft & Driving Gear | 15-16 | Turbo Charger, Heat Protector, Hose, Turbine Rotor Set, Blower Housing Set, Turbine Housing Set, Bearing Housing Set, Control Assy |
| Turbocharger | 17-18 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-pulley, Flywheel Assy, Ring Gear, Piston w/ Ring, Piston Ring Set, Connecting Rod Assy |
| Crankshaft & Piston | 19-20 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Lub. Oil Cooler, Dipstick Guide, Lub. Oil Dipstick, Gasket, Oil Inlet Pipe, Bracket Assy |
| Lub. Oil System | 21-22 | Oil Pressure Switch, Lo Pipe Assy, Retainer, Round Gasket, Elbow, Lub. Oil Return Pipe, Rubber Joint |
| Lub. Oil Pipe | 23-24 | Cooling Water Pump Assy, Cooling Water Pump Gasket, Elbow Pt, V-belt, V-pulley, Cooling Fan, Spacer, Thermostat Cover |
| Cooling Water System | 25-26 | F.i.inject Pump Assy, Camshaft, Thrust Ball Bearing, Cam Shaft Support, Plunger w/ Barrel, Retainer A, Plunger Spring Shoe, Plunger Spring |
| Fuel Injection Pump | 27-28 | Fuel Injection Valve Assy, Fuel Injection Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer, Fuel Injection Pipe |
| Fuel Injection Pipe | 29-30 | Pipe Joint, Fuel Oil Pipe Assy, Fuel Pipe, Fuel Return Pipe, Joint, Cap, Check Valve Assy, Round Gasket |
| Fuel Pipe | 31-32 | Packing, Cover, Link, Governor Weight Assy, Sleeve, Control Shaft Assy, Shaft Spacer, Spacer Assy |
| Governor | 33-34 | Starting Motor, Armature Assy, Thrust Washer Kit, Pinion Stopper Kit, Field Coil Assy, Brush, Rear Cover Assy, Holder |
| Starting Motor | 35-36 | Generator, Rotor Assy, Starter Assy, Rear Cover Assy, Regulator Brush Assy, Brush Assy, Fan Side Guide, Diode Assy |
| 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.
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