This Yanmar 3TNE68-TBZ engine parts catalog gives you the full exploded-view breakdown for the 3TNE68-TBZ diesel engine used in the TB15FR application. Use it to identify exact OEM part numbers and quantities across every assembly, from the cylinder block, crankshaft and piston, and cylinder head, through the fuel injection pump, governor, and injection valves, to the cooling and lubrication systems, starting motor, generator, and complete gasket set. Each section is an exploded parts diagram, so you can match the right component before you order.
What's Inside This Yanmar 3TNE68-TBZ Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 1 | Block Assy, Cylinder, Plug, Bolt, Bush, Main Bearing, Thrust Bearing |
| Gear Housing | 2 | Cover Assy Gear Case, Seal HTC456208, Gasket, Pump Assy, Hydraulic, O-Ring, Housing Assy, Gear |
| Flywheel Housing & Oil Pump | 3 | Housing, Flywheel, Cap, Flywheel Cover, Case Assy, Oil Seal, Sump Assy, Oil |
| Cylinder Head & Bonnet | 4 | Head Assy, Cylinder, Valve, Valve Stem Seal, Rocker Arm Support, Gasket, Bonnet, Glow Plug |
| Suction Manifold & Air Cleaner | 5 | Manifold, Suction, Gasket, Air Cleaner, Element, Valve, Unloader, Pipe |
| Exhaust Manifold & Silencer | 6 | Manifold, Exhaust, Gasket, Bolt, Stud, Clamp, Silencer |
| Camshaft & Driving Gear | 7 | Camshaft Assy, Tappet, Push Rod, Camshaft Gear, Idle Gear, Ball Bearing |
| Crankshaft & Piston | 8 | Crankshaft Assy, Crankshaft Gear, Flywheel Assy, Piston, Connecting Rod, Crankpin Bearing |
| Lub. Oil System | 9 | Lub. Oil Pump, Dipstick, Lub. Oil Filter, Oil Pressure Switch |
| Cooling Water System | 10 | C. Water Pump, Thermostat, Thermo Switch, Sub-Tank, Radiator, Water Pipes |
| Fuel Injection Pump | 11 | F.INJECT. Pump, Plunger, Delivery Valve, Rack, Pinion, Tappet |
| Governor | 12 | Case, Driving Set, Weight, Link, Lever, Engine Stop Device |
| Fuel Injection Valve | 13 | Fuel Inject. Valve, Nozzle, Nozzle Holder, Nozzle Spring, Injector Pipes, Fuel Return Pipe |
| Fuel Line | 14 | Fuel Strainer, Strainer Element, Fuel Oil Pipe, Water Separator, Feed Pump, Taper Valve |
| Starting Motor | 15 | Shift Lever, Armature, Brush Holder, Magnet Switch, Pinion |
| Generator | 16 | Stator, Coupler, Flywheel, Belt Adjuster, Current Limitter |
| Gasket Set | 17 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Bearing Quantity | 4 | p. 1 |
| Cylinder Head Stud Quantity | 14 | p. 1 |
| Knock Pipe Quantity | 4 | p. 2 |
| Bolt M6x45 Plated Quantity | 20 | p. 3 |
| Valve Guide Quantity | 6 | p. 4 |
| Thermostat Opening Temperature | 71°C | p. 10 |
| Thermo Switch Temperature | 110°C | p. 10 |
| Plunger w/Barrel Quantity (Fuel Injection Pump) | 3 | p. 11 |
| Glow Plug Quantity | 3 | p. 4 |
| Piston w/Rings Quantity | 3 | p. 8 |
| Tappet Quantity | 6 | p. 7 |
| Valve Spring Quantity | 6 | p. 4 |
Yanmar 3TNE68-TBZ Common Problems This Manual Covers
Trying to find replacement water pump part numbers for Yanmar 3TNE68-TBZ engine overheating with no coolant flow p. 10
Inspect the Cooling Water System exploded view on page 10. Locate the correct part number for the 71°C thermostat and its corresponding gasket. Verify the assembly details for the water pump and thermo switch rated for 110°C before placing your parts order.
Manual Section: Cooling Water SystemTrying to identify correct replacement head gasket part numbers after loss of compression and excessive exhaust smoke p. 4
Check the Cylinder Head & Bonnet parts list on page 4. Find the exact part number for the cylinder head gasket. Review the diagram to identify all 6 valve guides, 6 valve springs, and 3 glow plugs required for a complete top-end rebuild.
Manual Section: Cylinder Head & BonnetSearching for correct injection pump part numbers after engine fails to start or exhibits severe misfiring under load p. 11
Review the Fuel Injection Pump diagram on page 11. Find the specific part numbers for the pump assembly and internal components. Confirm the quantities match the diagram, ensuring you order exactly 3 plunger with barrel units for your block arrangement.
Manual Section: Fuel Injection PumpNeed replacement internal bottom end component part numbers after finding metal shavings in oil and hearing deep knocking p. 8
Inspect the Crankshaft & Piston diagram on page 8 to find your exact part numbers. Match your serial number to the correct piston assembly. Verify the parts list to ensure you order exactly 3 piston with rings assemblies for a complete engine overhaul.
Manual Section: Crankshaft & PistonFrequently Asked Questions
What are the replacement specifications for Cylinder head gasket?
The replacement cylinder head gasket for the Yanmar 3TNE68-TBZ engine is identified by part number 119265-01341. This gasket is listed as GASKET, CYL. HEAD in the manual.
What are the replacement specifications for Fuel injector nozzle?
The replacement fuel injector nozzle assembly for the Yanmar 3TNE68-TBZ engine is specified as part number 119620-53000. It is described as NOZZLE ASSY, F.INJECT in the manual.
How do you fix trying to find replacement water pump part numbers for Yanmar 3TNE68-TBZ engine overheating with no coolant flow?
Inspect the Cooling Water System exploded view on page 10. Locate the correct part number for the 71°C thermostat and its corresponding gasket. Verify the assembly details for the water pump and thermo switch rated for 110°C before placing your parts order.
How do you fix trying to identify correct replacement head gasket part numbers after loss of compression and excessive exhaust smoke?
Check the Cylinder Head & Bonnet parts list on page 4. Find the exact part number for the cylinder head gasket. Review the diagram to identify all 6 valve guides, 6 valve springs, and 3 glow plugs required for a complete top-end rebuild.
How quickly can I access this manual after buying?
Instant PDF download. You get the full 22-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print 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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