All 40 pages of this Yanmar 2TNV70-PTB, TB108 Parts Catalog (OEM #P-TB108EBB) map every replaceable component in the TB108 engine, from cylinder block and gear housing through the complete gasket set. Inside, exploded-view figures walk you through every major assembly: fuel injection pump, governor, crankshaft and piston, cooling water system, starting motor, and more. Each figure pairs component names to OEM part numbers so you can cross-reference a camshaft idle gear, flywheel housing seal, or water pump V-pulley without hunting multiple sources. Pull the fuel injection pump figure and you'll find the Plunger Assy, Delivery Valve, and fuel feed pump listed as separate line items, each carrying its own OEM number. Stop ordering wrong parts. Bookmarked and keyword-searchable, this PDF gets you to the right number the first time.
What's Inside This Yanmar 2TNV70-PTB (TB108) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 4-5 | Cylinder Block Assy, Camshaft Bush, Main Bearing Set Repair Part, Thrust Bearing, Cylinder Head Gasket, Thrust . Over-Sized Part Bearing, Main Metal Under-Sized Part |
| Gear Housing | 6-7 | Gear Case, Gear Case Cover Assy, Oil Seal, Pump Cover Assy, Lub. Oil Pump Cover, Relief Valve, Spring, Inner Rotor |
| Flywheel Housing & Oil Sump | 8-9 | Flywheel Housing, Flywheel Cover Cap, Oil Seal, Oil Sump Spacer, Lub. Oil Sump Assy, Gasket.liquid Optional Part |
| Cylinder Head & Bonnet | 10-11 | Engine Lifter, Nozzle Protecter, Nozzle Gasket, Valve Cap, Cylinder Head Assy, Valve Repair Part Guide, Intake Valve, Exhaust Valve |
| Air Cleaner | 12-13 | Aircleaner Body, Unloader Valve, Element, Cover Assy, Stay |
| Exhaust Manifold & Silencer | 14-15 | Exhaust Manifold, Manifold Gasket, Silencer Gasket, Silencer, Nozzle Gasket |
| Camshaft & Driving Gear | 16-17 | Tappet, Push Rod, Camshaft Assy, Idle Gear Shaft, Idle Gear Assy, Pump Gear, Flange |
| Crankshaft & Piston | 18-19 | Crankshaft Assy, Flywheel Assy, Ring Gear, Crankshaft V-Pulley, Piston Assy, Ring Set, Connecting Rod Assy, Piston Pin Repair Part Bush |
| Lub.Oil System | 20-21 | Dipstick, Lub. Oil Filter Assy, Lub, Oil Pipe Assy, Lub. Oil Switch, Hydraulic Pipe Assy, Joint Bolt Assy, Dipstick Guide |
| Cooling Water System | 22-23 | Water Pump Assy, Cover, Gasket, Water Pump Gasket, Round Gasket, Cooling Water Pump V-Pulley, A V Belt, Fan |
| Fuel Injection Pump | 24-25 | Fie Assy Governor Assy Isincorporated in This Fie Assy, Camshaft, Bearing Support, Plunger Assy, Seat Spring, Spring Retainer, Plunger Spring, Tappet Assy |
| Governor | 26-27 | Case Gasket, Governor Case, Cover Gasket, Selective Parts: Certain Theclasification Mark, Then Link, Governor Lever Shaft, Control Shaft Assy, Control Lever, Spacer Assy |
| Fuel Injection Valve | 28-29 | Injection Valve Assy, Nozzle Holder, Nozzle Assy, Retainer, Fuel Injection Pipe, Joint, Return Pipe Assy, Return Gasket |
| Fuel Line | 30-31 | Fuel Strainer Assy, Taper Valve Spring, Lever, Strainer Cup, Retaining Ring, Spring, Element, Pipe Joint |
| Starting Motor | 32-33 | Starter, Coil Assy, Field, Armature Assy, Clutch Sub-Assy, Housing Assy, Lever |
| Generator | 34-35 | Belt Adjuster, Safety Relay, Current Limiter, Timer |
| Gasket Set | 36-40 | Gasket Set Optional Part, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protecter, Bonnet Gasket, Manifold Gasket, Silencer Gasket, Nozzle Gasket |
Yanmar 2TNV70-PTB (TB108) Common Problems This Manual Covers
Yanmar 2TNV70-PTB fuel filter and water separator part numbers for hard-start diagnosis p. 30
Open the Fuel Line exploded view on page 30. The strainer assembly, taper valve, pipe joints, and water separator bowl are all itemized there. Cross-reference the parts list to confirm correct part numbers for your serial number range before ordering. Fuel-water separator and in-line strainer are the first replacements to pull when chasing hard-start or no-start complaints.
Manual Section: Fuel LineCan't identify correct fuel injection nozzle assembly part number for white smoke or rough-running complaint p. 28
Check the Fuel Injection Valve exploded view on page 28. The nozzle assembly, injection valve assembly, fuel injection pipes, and return line assemblies are all broken out individually. Locate your nozzle assembly part number from the parts list and verify it against your model designation before ordering, since nozzle specs differ between covered models.
Manual Section: Fuel Injection ValveOil filter assembly and lubrication system part numbers needed after low oil pressure or bearing noise event p. 20
Turn to the Lub. Oil System section on page 20. The filter assembly, oil pipes, dipstick, oil switch, and guide components are all listed with part numbers. Pull the filter assembly part number first; also check the Gear Housing on page 6 for the lube oil pump, which is itemized there under the gear case components.
Manual Section: Lub.Oil SystemWater pump assembly and thermostat part numbers needed for overheating or coolant leak repair p. 22
Go to the Cooling Water System section on page 22. The water pump assembly, V-pulley, thermostat, radiator assembly, and fan are all itemized in the exploded view and parts list. Identify the pump assembly part number and thermostat separately, as they are distinct line items. Impeller wear is a frequent failure point on these pumps, so confirm the impeller is included in the pump assembly part number or listed as a separate serviceable part.
Manual Section: Cooling Water SystemFuel injection pump plunger and delivery valve part numbers for injection or fuel delivery failure p. 24
Reference the Fuel Injection Pump section on page 24. The plunger assembly, delivery valve assembly, fuel feed pump, and rack/control components are each broken out with individual part numbers. Identify the plunger assembly and delivery valve as separate line items before ordering, since these are commonly replaced individually. Also check the Gasket Set on page 36 for the injection pump O-ring and gasket part numbers needed for reassembly.
Manual Section: Fuel Injection PumpEngine mount and crankshaft piston assembly part numbers needed for vibration or knock diagnosis p. 18
Check the Crankshaft & Piston section on page 18. The piston assembly, connecting rod assembly, ring set, crankshaft assembly, and crank pin bearing metal set are all itemized there. For engine mount hardware, cross-reference the Cylinder Block parts list on page 5, which covers block-level bolts and bushes. Confirm part numbers match your model designation before ordering bearing sets, as these can differ between models covered in this catalog.
Manual Section: Crankshaft & PistonFrequently Asked Questions
How do you fix yanmar 2TNV70-PTB fuel filter and water separator part numbers for hard-start diagnosis?
Open the Fuel Line exploded view on page 30. The strainer assembly, taper valve, pipe joints, and water separator bowl are all itemized there. Cross-reference the parts list to confirm correct part numbers for your serial number range before ordering. Fuel-water separator and in-line strainer are the first replacements to pull when chasing hard-start or no-start complaints.
How do you fix can't identify correct fuel injection nozzle assembly part number for white smoke or rough-running complaint?
Check the Fuel Injection Valve exploded view on page 28. The nozzle assembly, injection valve assembly, fuel injection pipes, and return line assemblies are all broken out individually. Locate your nozzle assembly part number from the parts list and verify it against your model designation before ordering, since nozzle specs differ between covered models.
How do you fix oil filter assembly and lubrication system part numbers needed after low oil pressure or bearing noise event?
Turn to the Lub. Oil System section on page 20. The filter assembly, oil pipes, dipstick, oil switch, and guide components are all listed with part numbers. Pull the filter assembly part number first; also check the Gear Housing on page 6 for the lube oil pump, which is itemized there under the gear case components.
How do you fix water pump assembly and thermostat part numbers needed for overheating or coolant leak repair?
Go to the Cooling Water System section on page 22. The water pump assembly, V-pulley, thermostat, radiator assembly, and fan are all itemized in the exploded view and parts list. Identify the pump assembly part number and thermostat separately, as they are distinct line items. Impeller wear is a frequent failure point on these pumps, so confirm the impeller is included in the pump assembly part number or listed as a separate serviceable part.
Is this Yanmar 2TNV70-PTB, TB108 Parts Catalog a digital download?
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