Tracking down the right components is effortless with this 32-page Yanmar 3TNE68-NBAB, TNE parts catalog PDF (OEM #Y00B5780) covering the complete industrial engine. You get crystal-clear exploded views for the entire assembly, from the cylinder block and gear housing to the complete fuel injection device. Detailed parts lists break down every single component with exact OEM numbers so you can order hardware without second-guessing. Verify the exact HTC456208 oil seal dimension for the gear housing or confirm the M22 drain plug thread before calling the parts counter. Waiting on backordered parts because of a wrong digit ruins your entire week. Grab this bookmarked download, pull up the exploded diagrams right on your shop tablet, and get your spares ordered with absolute confidence.
What's Inside This Yanmar 3TNE68-NBAB, 3TNE68-NBAB (B15AY), TNE Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Cylinder, Plug, Main Bearing, Thrust Bearing, Bush, Cylinder Head Gasket |
| Gear Housing | 5-6 | Gear Case, Oil Seal, Lub. Oil Pump, Gear Assy, Ball Bearing, O-Ring |
| Flywheel Housing & Lub. Oil Sump | 7-8 | Flywheel Housing, Flywheel Cover, Oil Seal, Oil Sump, Drain Plug, Seal Washer |
| Cylinder Head & Bonnet | 9-10 | Cylinder Head, Bonnet, Valve, Valve Spring, Valve Stem Seal, Rocker Arm, Glow Plug |
| Suction & Exhaust Manifold | 11-12 | Suction Manifold, Exhaust Manifold, Manifold Gasket, Bolt, Stud, Nut |
| Camshaft & Driving Gear | 13-14 | Camshaft, Camshaft Gear, Thrust Bearing, Tappet, Push Rod, Idle Gear, Ball Bearing |
| Crankshaft & Piston | 15-16 | Crankshaft, Crankshaft Gear, Fly |
| Lub. Oil System | 17-18 | - |
| Cooling Water System | 19-20 | Pump Assy, C. Water, Switch, Thermo, V-Pulley, Thermostat, Fan |
| Fuel Injection Device | 21-22 | Pump Assy, F.INJECT., Plunger W/BARREL, Nozzle Assy, F.INJECT, Pipe, Fuel Inject, Fuel INJECT.VALVE As |
| Fuel Pipe | 23-24 | Pipe W/JOINT, Fuel, Joint, Pipe, Clamp, Pipe Assy, Fuel Oil, Strainer |
| Governor | 25-26 | Cover, Case, Weight Assy, Gov., Lever Assy |
| Starting Motor | 27-28 | - |
| Generator | 29-30 | - |
| Gasket Set (Optional) & Tool | 31-32 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Lubricating Oil Filter Quantity | 1 filter | p. 16 |
| Thrust Bearing Undersize | 0.25 US | p. 14 |
| Oil Seal Dimension | HTC456208 | p. 4 |
| O-Ring 1A P-type Dimension | 12.0 | p. 4 |
| Drain Plug Thread | M22 | p. 6 |
| Pipe Dimension | 12x700 | p. 8 |
| Bolt Thread | M12x1.25 | p. 14 |
| Piston Assembly Oversize | 0.25 | p. 14 |
| Fan Diameter | 290 | p. 18 |
| Fuel Pipe Length | 500 | p. 22 |
| Link Length (White) | 88.8 | p. 24 |
| Link Length (Red) | 89.0 | p. 24 |
Yanmar 3TNE68-NBAB, 3TNE68-NBAB (B15AY), TNE Common Problems This Manual Covers
Need to find replacement part numbers for Yanmar 3TNE68-NBAB undersize thrust bearings after finding crank damage p. 14
Review the Camshaft & Driving Gear section on page 14. Identify the 0.25 US thrust bearing undersize components for your specific serial number. Cross-reference the required M12x1.25 bolt thread replacements while ordering your rebuild parts to ensure proper assembly.
Manual Section: Camshaft & Driving GearTrying to identify the correct fuel injection pipes and lines after a hard starting or no-start condition p. 22
Check the fuel parts diagram on page 22 to find the exact injection line part numbers. Verify the required fuel pipe length is 500 before ordering your replacements. Match the pipe assemblies and clamps to your pump configuration to ensure proper fitment.
Manual Section: Fuel Injection DeviceLeaking gear case cover requiring new seals and replacement drain plugs due to stripped threads p. 6
Inspect the gear housing parts list on page 6 to locate the correct replacement plug featuring an M22 drain plug thread. Order the corresponding seal washers and O-rings listed in the diagram to secure the housing and prevent further lubrication loss.
Manual Section: Gear HousingCannot locate the exact front or rear main oil seal part numbers to fix a massive oil leak p. 4
Review the engine parts diagram on page 4 to find the correct cylinder block seals. Locate the specific seal matching the HTC456208 oil seal dimension for your unit. Order the matching 12.0 P-type O-rings shown in the exploded view to complete the reseal.
Manual Section: Cylinder BlockFrequently Asked Questions
What are the replacement specifications for fuel filters?
The fuel strainer, which functions as a fuel filter, is identified by part number 119255-55620. This assembly also includes a cup, part number 121254-55510, and an O-ring, part number 102103-55520, for replacement.
How do you fix need to find replacement part numbers for Yanmar 3TNE68-NBAB undersize thrust bearings after finding crank damage?
Review the Camshaft & Driving Gear section on page 14. Identify the 0.25 US thrust bearing undersize components for your specific serial number. Cross-reference the required M12x1.25 bolt thread replacements while ordering your rebuild parts to ensure proper assembly.
How do you fix trying to identify the correct fuel injection pipes and lines after a hard starting or no-start condition?
Check the fuel parts diagram on page 22 to find the exact injection line part numbers. Verify the required fuel pipe length is 500 before ordering your replacements. Match the pipe assemblies and clamps to your pump configuration to ensure proper fitment.
How do you fix leaking gear case cover requiring new seals and replacement drain plugs due to stripped threads?
Inspect the gear housing parts list on page 6 to locate the correct replacement plug featuring an M22 drain plug thread. Order the corresponding seal washers and O-rings listed in the diagram to secure the housing and prevent further lubrication loss.
What format is this manual in?
You get a 32-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Is this Yanmar 3TNE68-NBAB, 3TNE68-NBAB (B15AY), TNE Parts Catalog printable?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text quality is crisp and easy to read throughout. Diagrams and illustrations are clear, with all labels perfectly readable, appearing to be high-quality vector or high-resolution raster images. All pages are clean, free from scan artifacts, stains, or skewed content. There are no notable blank or filler pages included.
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