Part of the Yanmar Parts Manuals.
Chase one wrong digit in a bearing number and you will pull a fresh rebuild back apart to fix it. That is what Yanmar's own parts catalog for the 3TNE68-EBVB, publication Y00B6920, is there to prevent: every component on its exploded diagrams carries the factory part number, so what you order is what the engine left the plant with.
The catalog runs 33 pages across 16 bookmarked sections, from Cylinder Block and Crankshaft & Piston through the Lub. Oil System, Cooling Water System, Fuel Injection Device, Governor, Starting Motor, and Generator, closing with the Gasket Set & Tools listing. It applies to the engine itself, whatever it happens to power.
As a 0.59 MB PDF download, it opens on the phone beside the stand or prints page by page, so the injection pump listing can sit next to the pump while you order plungers, delivery valves, and shims.
What's Inside This Yanmar 3TNE68-EBVB, Y00B6920 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 2-3 | Cylinder Block Assy, Bush, Main Bearing, Thrust Bearing, Cylinder Head Gasket |
| Gear Housing | 4-5 | Gear Assy Case, Gear Case Cover Assy, Oil Seal, Knock Pipe, Cover, Gasket, Filler Cover, Blind Cover |
| Flywheel Housing & L.O. Sump | 6-7 | Flywheel Housing, Flywheel Cover Cap, Oil Seal Case Assy, Oil Seal, Oil Sump Spacer, Lub. Oil Sump Assy, Oil Drain Hose Assy |
| Cylinder Head & Bonnet | 8-9 | Bonnet Assy, Filler Cover, Breather Joint, Shelter Plate, Gasket, Bonnet Gasket, Engine Lifter, Pipe * |
| Suction & Exhaust Manifold | 10-11 | Intake Manifold, Suction Manifold Gasket, Exhaust Manifold, Exhaust Manifold Gasket |
| Camshaft & Driving Gear | 12-13 | Camshaft Assy, Camshaft Gear, Thrust Bearing, Push Rod, Tappet, Fuel Cam Bearing, Fuel Injection Pump Cam Assy, Flange |
| Crankshaft & Piston | 14-15 | Crankshaft Assy, Flywheel Assy, Ring Gear, Crankshaft Pully, Piston W/ Rings, Ring Set, Connecting Rod Assy, Crankpin Bearing |
| Lub. Oil System | 16-17 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Dipstick, Dipstick Guide, Lub. Oil Switch, Oil Intake Pipe Assy, Lub. Oil Filter, Oil Press Valve Assy |
| Cooling Water System | 18-19 | Cooling Water Pump Assy, Cooling Water Gasket, V-Belt, Cooling Water Pump V-Pulley, Fan, Spacer, Cover_thermos O_ring, Thermostat Cover |
| Fuel Injection Device | 20-21 | Fuel Injection Pump Assy, Plunger W/ Barrel, Retainer, Plunger Spring, Delivery Valve W/ Seat, Delivery Valve Spring, Delivery Valve Holder, Delivery Gasket |
| Fuel Pipe | 22-23 | Fuel Oil Pipe Assy, Pipe Joint, Fo-T, Fuel Oi Filter Assy, Taper Valve Spring, Lever, Strainer Cup, Retaining Ring |
| Governor | 24-26 | Gasket, Governor Case Cover, Governor Weight Assy, Governor Sleeve, Governor Case, Link Color, Shaft, Governor Lever Assy |
| Starting Motor | 27-28 | 12V- .8KW Starter, Shift Lever Kit, Pinion Stopper Set, Thrust Washer Kit, Armature, Rear Cover Assy, Brush Holder Assy, Brush |
| Generator | 29-30 | Plate Assy, Stator, Collar, Coupler, Flywheel, Pulley, Shaft |
| Gasket Set & Tools | 31-33 | Gasket Set, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Gasket, Bonnet Gasket, Suction Manifold Gasket, Exhaust Manifold Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bearing, Thrust Undersize | .25US | p. 2 |
| Bolt M6x16 Plated | M 6X 16mm | p. 4 |
| Pipe Dimensions | 12*700mm | p. 8 |
| Plug Thread Size | PT3/8 | p. 8 |
| Oil Pressure Switch Activation | 0.5KG | p. 16 |
| Starter Motor Power | 0.8KW | p. 27 |
| Parallel Pin Size | 8X16mm | p. 6 |
Yanmar 3TNE68-EBVB, Y00B6920 Common Problems This Manual Covers
Hard starting after fuel contamination
Dirty fuel plugs the filter and pulls air into the lines, and the engine cranks without firing. The Fuel Pipe section lists the fuel filter assembly, pipes, joints, and clamps by part number, so you can renew the whole fuel run instead of chasing one leak at a time.
Manual Section: Fuel Pipe p. 22Overheating from cooling system neglect
A tired water pump, a stuck thermostat, or a glazed V-belt will cook this engine before the gauge tells the whole story. The Cooling Water System section identifies the water pump assembly, thermostat, thermo switch, V-belt, and V-pulley so every worn piece goes back new.
Manual Section: Cooling Water System p. 18Low oil pressure at idle
Low pressure warm at idle points to a worn oil pump, a clogged filter, or a lazy pressure switch. The Lub. Oil System section carries part numbers for the lube oil pump assembly, filter, dipstick, and oil pressure switch.
Manual Section: Lub. Oil System p. 16Compression loss from valve wear
Older engines lose compression through burned valves, weak springs, and a tired head gasket, and the fix means a full head job. The Cylinder Head & Bonnet section lists the head assembly, valves, springs, rocker arm parts, and gaskets you will need on the bench.
Manual Section: Cylinder Head & Bonnet p. 8White smoke and rough running
A worn plunger and barrel or a fouled nozzle ruins injection and shows up as white smoke and uneven firing. The Fuel Injection Device section breaks the pump down to plunger with barrel, delivery valve with seat, shim packs, and nozzle assemblies.
Manual Section: Fuel Injection Device p. 20Bearing wear caught at teardown
If the crank needs a regrind, the bearings that go back in must match the cut, not the guess. The Cylinder Block section lists main bearings and thrust bearings, including a .25US undersize thrust bearing, alongside the block assembly, plugs, and gaskets.
Manual Section: Cylinder Block p. 2Starter drags or fails to engage
A dragging or silent starter on a diesel this small is often the motor itself rather than the battery. The Starting Motor section lists the 0.8 kW starter and its related parts so you can order a replacement by number.
Manual Section: Starting Motor p. 27Frequently Asked Questions
Which engine does this parts catalog cover?
It covers the Yanmar 3TNE68-EBVB diesel engine and is Yanmar's own publication, number Y00B6920. The part numbers apply to the engine itself, whatever machine or application it is mounted in.
Does it list undersize bearings for a reground crankshaft?
Yes. The Cylinder Block section lists main bearings and thrust bearings, including a .25US undersize thrust bearing, so you can order shells to match the machinist's cut instead of guessing. p. 2
Are individual fuel injection pump parts listed?
Yes. The Fuel Injection Device section breaks the injection pump into plunger with barrel, delivery valve with seat, shim packs, and nozzle assemblies, each with its own factory part number. p. 20
Does it cover the starter and charging system?
Yes. The Starting Motor section lists the 0.8 kW starter and its parts, and a separate Generator section covers the charging side, so the electrical end of a rebuild is ordered from the same book. p. 27
What do I get after purchasing this Yanmar 3TNE68-EBVB manual?
Immediate download of the complete 33-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
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.
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