Part of the Yanmar Parts Manuals.
Every subassembly on the 3TNV84T-XBL gets its own exploded view here: cylinder block, gear housing, cylinder head and bonnet, camshaft and driving gear, crankshaft and piston, fuel injection pump, governor, injection valves, turbine and silencer, cooling water system, starter motor and generator, right down to the gasket set. This is Yanmar's own parts catalog, publication 0CB10-M73401EN, and it also lists the 4JH-DT, 4JH-DTZ, 4JH-DTZA, 4JH-DTZY and 4JH-DTZP.
When the engine is apart on a stand and there is nobody to ask which main bearing assembly or valve stem seal fits, the effective machine number columns and interchangeability symbols settle it against your serial. Prefixes E00185, E/#21868, E/#25364, E/#27323, E/#30635 and E/#32451 are covered.
The whole catalog is a 26 page PDF, about 1.1 MB, delivered as a download the moment you pay. Print the page you are working from, take it to the bench and let it get oily; the file stays clean.
What's Inside This 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 |
