All 32 pages of this Yanmar 3TNE68L-UBC Parts Catalog PDF focus on one thing: tracking down the exact part number for your 3TNE68L-UBC (B19) or T-series industrial engine without guessing. Inside you get exploded-view diagrams for every major assembly: cylinder block, gear housing, flywheel housing, cylinder head, suction and exhaust manifolds, crankshaft and piston, camshaft and driving gear, lube oil system, cooling water system, fuel injection device, governor, starting motor, and generator. Each diagram pairs with a numbered parts list so you can match any component to its exact Yanmar part number in seconds. When you need the .25US thrust bearing or the M6x12 plated cylinder block bolt, the parts list hands you the factory designation, no catalog diving required. Stop burning time hunting part numbers across forums. Bookmarked and keyword-searchable, pull it up on any device and find the right part before you call the counter.
What's Inside This Yanmar 3TNE68L-UBC, 3TNE68L-UBC (B19) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Block Assy, Cylinder, Plug, Main Bearing, Thrust Bearing, Bush, Camshaft, Gasket |
| Gear Housing | 5-6 | Housing Assy, Gear, Cover Assy, Gear Case, Seal, Cap, LUB.OIL Supply, O-Ring |
| Flywheel Housing & Lub. Oil Sump | 7-8 | Housing, Flywheel, Cap, Flywheel Cover, Case Assy, Oil Seal, Sump Assy, Oil |
| Cylinder Head & Bonnet | 9-10 | Bonnet Assy, Head, Head Assy, Cylinder, Valve, Suction, Exhaust |
| Suction & Exhaust Manifold | 11-12 | Manifold, Suction, Gasket, SUC.MANIFOLD, Exhaust, EXH.MANIFOLD |
| Camshaft & Driving Gear | 13-14 | Camshaft Assy, Gear, Camshaft, Tappet, Rod, Push, Cam Assy, F.I. Pump |
| Crankshaft & Piston | 15-16 | Crankshaft Assy, Flywheel Assy, Piston W/RINGS, Pin, Piston, Rod Assy, Connecting, Bearing |
| Lub. Oil System | 17-18 | Pump Assy, Lub. Oil, Dipstick, Filter, Valve Assy, Oil Press, Pipe Assy |
| Cooling Water System | 19-20 | Pump Assy, C.W, Switch, Thermo, V-Pulley, V-Belt, Thermostat |
| Fuel Injection Device | 21-22 | Pump Assy, F.INJECT., Plunger W/BARREL, Valve W/SEAT, Deliv., Nozzle Assy, F.INJECT, Pipe |
| Fuel Line | 23-24 | Pipe W/JOINT, Fuel, Clamp, Pipe Assy, Fuel Oil, Strainer, Element |
| Governor | 25-26 | Governor Case, Weight Assy, Gov., Shaft, Governor Lever, Lever Assy, Spring |
| Starting Motor | 27-28 | Starter, Amature Assy., Pinion Assy, Brush, Housing, Gear, Switch, Magnetic |
| Generator | 29-32 | Plate Assy, Stator, Coupler, Adjuster, Belt |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| PLUG type/size | PT1/8 | p. 2 |
| PLUG size | 6X10 | p. 2 |
| BOLT size | M 6X 12 PLATED | p. 2 |
| BEARING, THRUST size | .25US | p. 2 |
| STUD size | M 8X 22 | p. 4 |
| SPRING PIN size | 4X10 | p. 4 |
| OIL SEAL type | HTC456208 | p. 4 |
| O-RING size | 1A P 12.0 | p. 4 |
| FAN diameter | D=290 | p. 18 |
| PIPE length | L=500 | p. 22 |
Yanmar 3TNE68L-UBC, 3TNE68L-UBC (B19) Common Problems This Manual Covers
Yanmar 3TNE68L-UBC engine fails to start in cold conditions with white smoke and abnormal noise p. 9
Inspect the cylinder head exploded view on page 9 to locate the replacement glow plugs. Review the detailed parts list for the exact component numbers. Confirm the block requires a PT1/8 type plug as shown on page 2 before ordering.
Manual Section: Cylinder Head & BonnetEngine overheating and reduced power output with E02 high coolant temperature error code p. 18
Review the parts diagram on page 18 to identify the correct cooling fan assembly. Verify the required fan diameter of D=290 against your existing setup. Cross-reference the fan and associated mounting hardware part numbers in the index before ordering replacements.
Manual Section: Lub. Oil SystemE03 fuel injection malfunction code with poor combustion and suspected cracked injection lines p. 21
Examine the fuel injection device assembly on page 21 to find the correct replacement fuel pipes. Check the parts table on page 22 to confirm the exact L=500 pipe length required for your setup. Order the matching pipe and joint components.
Manual Section: Fuel Injection DeviceSevere oil pressure drop and E01 code with oil leaking near the gear housing p. 5
Check the gear housing exploded view on page 5 to identify the replacement seals. Review the hardware list on page 4 to ensure you order the exact 1A P 12.0 size O-ring and HTC456208 type oil seal for a proper fit.
Manual Section: Gear HousingFrequently Asked Questions
What are the replacement specifications for Fuel filters (primary and secondary)?
The manual identifies the 'STRAINER, FUEL' with part number 119255-55620 and the 'ELEMENT, FUEL' with part number 124550-55700. These part numbers serve as replacement specifications for the fuel filters.
What are the replacement specifications for Glow plugs?
The replacement specification for the glow plug is identified by part number 129155-77801 for the 'PLUG, GLOW'. Additionally, the 'CONNECTOR, GLOW PLUG' has part number 119620-77820.
How do you fix yanmar 3TNE68L-UBC engine fails to start in cold conditions with white smoke and abnormal noise?
Inspect the cylinder head exploded view on page 9 to locate the replacement glow plugs. Review the detailed parts list for the exact component numbers. Confirm the block requires a PT1/8 type plug as shown on page 2 before ordering.
How do you fix engine overheating and reduced power output with E02 high coolant temperature error code?
Review the parts diagram on page 18 to identify the correct cooling fan assembly. Verify the required fan diameter of D=290 against your existing setup. Cross-reference the fan and associated mounting hardware part numbers in the index before ordering replacements.
Is this Yanmar 3TNE68L-UBC, 3TNE68L-UBC (B19), T-series manual a digital?
Instant PDF download. You get the full 32-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this Yanmar 3TNE68L-UBC, 3TNE68L-UBC?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Document Quality
This document is a scanned PDF with an OCR text layer, allowing you to search and copy text from the main content. The text quality is crisp and easy to read throughout the document. Diagrams and illustrations are clear raster images, and their labels are generally readable, though they may pixelate at high zoom levels. All pages appear clean with no significant scan artifacts or marks, and there are no notable blank pages.
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