Looking for exact replacement numbers for your excavator engine? This 124-page Yanmar 3TNE82A-ETB, 3TNV82A-QTB, QTB1, TB125 Parts Catalog PDF breaks down the complete block, fuel system, and cooling assembly for your TB125. You get clear exploded views showing the exact orientation of every cylinder head, gear housing, and fuel injection pump component. Open to detailed parts lists featuring factory numbers for the governor assembly, exhaust manifold, and starting motor to guarantee accurate ordering. Verify you are sourcing the correct A-38 V-belt for the 3TNE series, or confirm the 7x14 crankshaft key dimensions before placing a parts order. Ordering the wrong component keeps your machine dead in the dirt. Grab this bookmarked file right now, pull up the correct number on your phone, and get the exact part shipped today.
What's Inside This Yanmar 3TNE82A / 3TNV82A Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 5-6 | Cylinder Block Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Gear Housing | 7-8 | Gear Housing Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Flywheel Housing & Oil Sump | 9-10 | Flywheel Housing & Oil Sump Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Cylinder Head & Bonnet | 11-12 | Cylinder Head & Bonnet Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Suction Manifold & Air Cleaner | 13-14 | Suction Manifold & Air Cleaner Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Exhaust Manifold & Silencer | 15-16 | Exhaust Manifold & Silencer Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Camshaft & Driving Gear | 17-18 | Camshaft & Driving Gear Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Crankshaft & Piston | 19-20 | Crankshaft & Piston Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Lub.Oil System | 21-22 | Lub.Oil System Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Cooling Water System | 23-24 | Cooling Water System Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Fuel Injection Pump | 25-26 | Fuel Injection Pump Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Governor | 27-28 | Governor Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Fuel Injection Valve | 29-30 | Fuel Injection Valve Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Fuel Line | 31-32 | Fuel Line Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Starting Motor | 33-34 | Starting Motor Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Generator | 35-36 | Generator Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Gasket Set | 37 | Gasket Set Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Parts Index | 38-41 | Parts Index Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Exhaust Manifold & Silencer (Qtb) | 95-96 | Exhaust Manifold & Silencer (Qtb) Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Exhaust Manifold & Silencer (Qtb1) | 97-98 | Exhaust Manifold & Silencer (Qtb1) Parts, Exploded Parts Diagram, Part Numbers, Quantities |
| Tool & Gasket Set | 121 | Tool & Gasket Set Parts, Exploded Parts Diagram, Part Numbers, Quantities |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| L.O. Pressure Switch Activation | 0.5 KG | p. 21 |
| Crankshaft Key Size | 7X 14 | p. 19 |
| Piston Pin Circlip Size | 23 | p. 19 |
| Main Bearing Undersize | 0.25 | p. 5 |
| 3TNE82A-ETB, 3TNE82A-TB | ||
| Cooling Fan Diameter | 325MM | p. 23 |
| V-Belt Size | A-38 | p. 23 |
| Governor Link Length (Mark 0) | 30 | p. 27 |
| 3TNV82A-QTB, QTB1 | ||
| V-Belt Size | A36.5 | p. 105 |
Yanmar 3TNE82A / 3TNV82A Series Common Problems This Manual Covers
Yanmar 3TNE82A-ETB engine overheating with coolant leaks around the water pump housing p. 22
Inspect the cooling parts exploded view on page 22. Verify the 325MM cooling fan diameter and compatible A-38 V-belt size on page 23. Cross-reference the water pump impeller and housing gasket part numbers in the index before ordering replacements for your rebuild.
Manual Section: Cooling Water SystemEngine drops RPM and pukes out at half throttle when operating under heavy load p. 24
Check the fuel parts diagram on page 24. Locate the fuel filter and injection pump assemblies. Verify the governor link length is 30 for Mark 0 applications on page 27. Match the correct injection valve part numbers to your specific serial number.
Manual Section: Fuel Injection PumpLow oil pressure warning light stays illuminated after completing a cold start rebuild p. 21
Review the parts number list on page 5. Identify the correct 0.25 main bearing undersize part numbers for your crankshaft. Verify the L.O. pressure switch activation rating of 0.5 KG on page 21. Order the complete overhaul gasket set to seal the block.
Manual Section: Lub.Oil SystemSquealing noise emitting from the front accessory drive pulleys during high RPM operation p. 105
Examine the V-belt specifications on page 105. Confirm you require the exact A36.5 size belt for the 3TNV82A-QTB model applications. Check the generator mounting brackets, cooling fan, and tensioner pulley part numbers in the exploded parts index to ensure proper alignment.
Manual Section: GeneratorFrequently Asked Questions
What are the replacement specifications for Overhaul gasket set?
For the 3TNV82A-QTB,QTB1, the overhaul gasket set is part number 719823-92840, described as "GASKET SET(NON-ASB.)". This set includes the head gasket, which has part number 119812-01330.
What part numbers does this Yanmar 3TNE82A / 3TNV82A Series catalog list on page 101?
This Parts Catalog gives the exact OEM part numbers and quantities for page 101 as an exploded diagram, so you can identify and order the correct replacement components for your Yanmar 3TNE82A / 3TNV82A Series engine.
How will I receive this Yanmar 3TNE82A / 3TNV82A Series Engine Parts Catalog?
Immediate download of the complete searchable Parts Catalog PDF. 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 Parts Catalog?
Yes, print as many copies as you want, with no restrictions. Many mechanics print the section they need and bring it to the shop floor.
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