Need OEM part numbers for your Yanmar 3TNV84T-XBL or 4JH-DT engine? This 26-page parts catalog (OEM #0CB10-M73401EN) covers the complete 4JH family: DT, DTZ, DTZA, DTZY, and DTZP variants. Inside: exploded-view diagrams for every major assembly, from the cylinder block and crankshaft through the fuel injection pump, governor, and starter motor. Each view pairs with an itemized list showing OEM part numbers, interchangeability symbols, and effective machine serial numbers so you pull the right part on the first order. The 3TNV84T-XBL thermostat carries a 71C operating rating; cross-reference the V-belt to size A38.5 before you order. Guessing at part numbers kills your lead time. Bookmarked by assembly and searchable by keyword: pull up the crankshaft section or cooling water system in seconds and have the exact OEM number ready when you call the dealer.
What's Inside This Yanmar 3TNV84T-XBL / 4JH-DT Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Reference Materials | 2 | Fuel Injection Pump, Fuel Injection Pump N, Camshaft, Roller Bearing, Retainer |
| Cylinder Block | 4 | Cylinder Block Assy, Camshaft Bush, Camshaft N Bush, Main Bearing Assy, Main Lower N Bearing, Thrust Bearing Assy, Thrust N Bearing Assy, Head Gasket |
| Gear Housing | 5 | Gear Case Assy, Oil Seal, Oil N Seal, Cover Assy, Pump Cover, Relief Valve, Spring, Gear Case Flange |
| Mounting Flange & Oil Sump | 6 | Oil Seal Case Assy, Oil Seal, Oil-Pan Spacer, Mounting Flange, Oil Sump Assy |
| Cylinder Head & Bonnet | 7 | Engine Lifter, Rocker Shaft Assy, Rocker Arm Shaft, Rocker Arm Support, Rocker Spring, Rocker Arm Assy, Valve Cap, Cylinder Head Assy |
| Suction Manifold | 8 | Air Intake Pipe, Air Intake Manifold, Manifold Gasket, Air 11V Heater, Air 11V N Heater, Air Heater Gasket, Air Heater Bend |
| Exhaust Manifold | 9 | Exhaust Manifold Gasket, Bolt |
| Camshaft & Driving Gear | 10 | Tappet, Push-Rod, Camshaft Assy, Thrust Bearing, Camshaft Gear, Idle Shaft, Idle Gear Assy, Idle N Gear Assy |
| Turbine & Silencer | 11 | Gasket, RHB31w/ G Turbine, Silencer, Silencer Bracket, Silencer F Bracket, Pulley Spacer, Spacer S |
| Crankshaft & Piston | 12 | Crankshaft Assy, Crank V-Pulley, Flywheel Assy, Ring Gear, Piston Assy, Piston Ring Set, Ring, Connecting Rod Assy |
| Lub. Oil System | 13 | Oil Dipstick, Dipstick Guide, Gasket, Oil Inlet Pipe Assy, Cooling Nozzle, Filter Bracket Assy, Lo Filter, Hydraulic Switch |
| Lub. Oil Pipe | 14 | Oil Pipe Assy, Rubber Joint, Joint M8 Bolt Assy, 8X1 Gasket |
| Cooling Water System | 15 | Water Pump Assy, Water Pump Gasket, Pump Plate, Joint, Thermostat Gasket, V-Pulley, A38 V-Belt, Cooling D380 Fan |
| Fuel Injection Pump | 16-17 | Injection Pump Assy, Over Flow Joint, Tappet Stopper, Delivery Valve Assy, Delivery Spring, Delivery Holder, Cooling Water Joint, Link Lifter |
| Governor | 18 | Gasket, Governor Case Cover, Governor Case N Cover, Return Spring, Regulator Lever, Shaft Stopper, Stop Solenoid |
| Fuel Injection Valve | 19 | Fuel Injector Assy, F.i Nozzle Assy, Nozzle Spring, Spring Seat, Spacer, Cap, Cap N, Pipe Retainer |
| Fuel Pipe | 20 | Filter Bracket, Filter R Bracket, Fo Filter, D13XL220 Hose Assy, Fuel Hose, Corrugated Tube, Nylon Band |
| Starter Motor | 21 | Starter Assy, Switch Assy, Armature Assy, Field Coil Assy, Brush, Cover, Brush Holder Assy, Brush Spring |
| Generator | 22 | 40A Generator Assy, Rotor Assy, Bearing Cover, Generator Frame Assy, Retainer, Frame Assy, Cover, Generator Pulley |
| Gasket Set & Tool | 23 | Gasket Set, Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Bonnet Gasket, Air Heater Gasket, Exhaust Manifold Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Thermostat operating temperature | 71C | p. 15 |
| Air Heater Voltage | 11V | p. 8 |
| Thermostat Opening Temperature | 71C | p. 15 |
| V-Belt Type/Size | A38.5 | p. 15 |
| Thermo Switch Temperature | 110C | p. 15 |
Yanmar 3TNV84T-XBL / 4JH-DT Series Common Problems This Manual Covers
Yanmar 3TNV84T-XBL fuel filter part number needed, engine hard starting and losing power under load p. 20
Check the Fuel Pipe diagram on page 20. The Filter, Bracket, Hose Assy, corrugated Tube, and Clamp are each listed as separate Ref. No. items. Cross-reference the index to confirm correct part numbers for your serial number range before placing the order.
Manual Section: Fuel PipeWater pump impeller and thermostat part numbers missing, cooling system rebuild parts list incomplete p. 15
Open the Cooling Water System diagram on page 15. The impeller and thermostat are listed as separate sub-assemblies. For the 3TNV84T-XBL, the thermostat opens at 71C; match that temperature rating to the listed part number before ordering. The V-belt (size A38.5) is also itemized on page 15 and commonly ordered at the same interval.
Manual Section: Cooling Water SystemAir intake heater and suction manifold gasket part numbers needed, hard cold starts persisting p. 8
Find the Suction Manifold exploded view on page 8. The Air Heater assembly and manifold gasket are listed separately with distinct Ref. No. entries. On the 3TNV84T-XBL, the air heater operates at 11V; verify that rating against the part number listed to avoid ordering a mismatched replacement. Confirm the gasket part number by cross-referencing page 23.
Manual Section: Suction ManifoldFuel injection nozzle and nozzle holder part numbers unclear, white smoke and rough running p. 19
Turn to the Fuel Injection Valve diagram on page 19. The nozzle, nozzle holder, and all associated seal components are each itemized separately with individual Ref. No. entries. Identify your engine variant using the Effective Machine No. column explained on page 2 to confirm part number validity for your specific serial range.
Manual Section: Fuel Injection ValveCrankshaft main bearing and piston ring part numbers needed, engine rebuild after oil pressure loss p. 12
Locate the Crankshaft and Piston diagram on page 12. Main bearings, connecting rod bearings, and piston rings are all listed with separate Ref. No. entries. Cross-reference the Cylinder Block assembly on page 4 for thrust bearing and camshaft bearing part numbers. Verify the Interchangeability Symbol on page 2 against your serial range before ordering.
Manual Section: Crankshaft & PistonFrequently Asked Questions
How do you fix yanmar 3TNV84T-XBL fuel filter part number needed, engine hard starting and losing power under load?
Check the Fuel Pipe diagram on page 20. The Filter, Bracket, Hose Assy, corrugated Tube, and Clamp are each listed as separate Ref. No. items. Cross-reference the index to confirm correct part numbers for your serial number range before placing the order.
How do you fix water pump impeller and thermostat part numbers missing, cooling system rebuild parts list incomplete?
Open the Cooling Water System diagram on page 15. The impeller and thermostat are listed as separate sub-assemblies. For the 3TNV84T-XBL, the thermostat opens at 71C; match that temperature rating to the listed part number before ordering. The V-belt (size A38.5) is also itemized on page 15 and commonly ordered at the same interval.
How do you fix air intake heater and suction manifold gasket part numbers needed, hard cold starts persisting?
Find the Suction Manifold exploded view on page 8. The Air Heater assembly and manifold gasket are listed separately with distinct Ref. No. entries. On the 3TNV84T-XBL, the air heater operates at 11V; verify that rating against the part number listed to avoid ordering a mismatched replacement. Confirm the gasket part number by cross-referencing page 23.
How do you fix fuel injection nozzle and nozzle holder part numbers unclear, white smoke and rough running?
Turn to the Fuel Injection Valve diagram on page 19. The nozzle, nozzle holder, and all associated seal components are each itemized separately with individual Ref. No. entries. Identify your engine variant using the Effective Machine No. column explained on page 2 to confirm part number validity for your specific serial range.
How quickly can I access this manual after buying?
This is a 26-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.
Can I print specific sections of 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 scanned PDF, but it includes an OCR layer, so you can search and copy all text within the catalog. The text throughout the document is crisp and easy to read, with no blurriness or fading. All diagrams and illustrations are raster images, but they are clear, and their labels are fully readable. The pages are clean, free of scan artifacts, stains, or skewed content. There are no notable blank or filler pages present.
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