All 40 pages of this Yanmar 2TNV70-PTB Parts Catalog (OEM #YOOF2161) map every component of the 2TNV70-PTB engine — used in the Takeuchi TB108 compact excavator — down to individual gaskets, O-rings, and solenoid springs. Inside: exploded-view diagrams from cylinder block through generator, each with reference numbers, interchangeability marks, and effective machine numbers so you order the right part for your exact serial range. A numerical index cross-references every part number to its figure and item reference for fast lookups. Pull the cooling system apart knowing the radiator cap is rated 0.9 kg/cm² and your fan V-belt is A35, with every part number right in front of you. No more dead ends chasing parts through old dealer catalogs. Bookmarked by section: jump to Fuel Injection Pump, Governor, or Gasket Set in one click, on any device.
What's Inside This Yanmar 2TNV70-PTB (TB108) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 4-5 | Block Assembly, Plugs, Bolts, Main Bearing Set, Thrust Bearings |
| Gear Housing | 6-7 | Gear Case, Oil Seal, Relief Valve, Oil Pump Components, Bolts |
| Flywheel Housing & Oil Sump | 8-9 | Flywheel Housing, Oil Sump, Oil Seal, Bolts, Gaskets |
| Cylinder Head & Bonnet | 10-11 | Head Assembly, Valves, Valve Springs, Rocker Arm Assembly, Gaskets |
| Air Cleaner | 12-13 | Body, Element, Unloader Valve, Clamps |
| Exhaust Manifold & Silencer | 14-15 | Exhaust Manifold, Silencer, Gaskets, Bolts |
| Camshaft & Driving Gear | 16-17 | Camshaft Assembly, Tappets, Push Rods, Idle Gear, Pump Gear |
| Crankshaft & Piston | 18-19 | Crankshaft Assembly, Pistons, Piston Rings, Connecting Rods, Bearings |
| Lub. Oil System | 20-21 | Dipstick, Oil Filter, Oil Pipe, Oil Pressure Switch |
| Cooling Water System | 22-23 | Water Pump, Thermostat, Radiator, Fan, V-Belt |
| Fuel Injection Pump | 24-25 | Fie Assembly, Plunger, Delivery Valve, Control Rack, Governor Components |
| Governor | 26-27 | Case, Control Lever, Springs, Weights, Solenoid |
| Fuel Injection Valve | 28-29 | Injection Valve, Nozzle Holder, Fuel Pipes, Return Pipes |
| Fuel Line | 30-31 | Fuel Strainer, Fuel Filter, Water Separator, Fuel Pipes, Clamps |
| Starting Motor | 32-33 | Starter Assembly, Armature, Clutch, Solenoid Switch |
| Generator | 34-35 | Assembly, Stator, Pulley, Adjuster Belt |
| Gasket Set | 36-37 | Components, Cylinder Head Gasket, Oil Pump O-Rings, Valve Stem Seals |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Radiator Cap Pressure | 0.9 kg/cm² | p. 23 |
| Oil Pressure Switch Setting | 0.5 kg | p. 21 |
| Generator Output | 15A | p. 35 |
| Timer Setting | 1 sec | p. 35 |
| V-Belt Size | A35 | p. 23 |
Yanmar 2TNV70-PTB (TB108) Common Problems This Manual Covers
Radiator cap part number unclear in parts order, V-belt size also unconfirmed for cooling system p. 22
Check the Cooling Water System exploded view on page 22. The radiator cap is rated at 0.9 kg/cm²; match that rating to the correct part number in the parts list before ordering. The drive belt is size A35, confirmed on page 23. Verify the Effective Machine Number column to confirm both parts fall within your engine's serial range.
Manual Section: Cooling Water SystemOil pressure switch part number hard to confirm without knowing which exploded view reference number applies p. 20
Open the Lub. Oil System parts list on page 20. Locate the oil pressure switch, rated at 0.5 kg, in the numbered exploded view, then match its reference number to the corresponding row in the parts list. Check the Interchangeability Mark column to confirm the part number is valid for your engine's serial range before placing the order.
Manual Section: Lub. Oil SystemGenerator stator and adjuster belt part numbers unclear, wrong assembly group referenced when ordering p. 34
Pull up the Generator exploded view on page 34. This is a 15A output assembly; confirm that group matches your engine before pulling part numbers for the stator, pulley, or adjuster belt. If you have a part number but cannot locate it in the diagram, cross-reference the Numerical Index starting on page 38 to find the exact diagram and parts list row.
Manual Section: GeneratorFrequently Asked Questions
What are the replacement specifications for fuel filter?
The fuel filter for the Yanmar 2TNV70-PTB is identified by part number 119833-55620, described as "STRAINER ASSY, FUEL". This part is found in the FUEL LINE section of the catalog. The manual provides the specific part number for replacement.
What are the replacement specifications for oil filter?
The oil filter for the Yanmar 2TNV70-PTB is part number 119305-35151, described as "FILTER ASSY, LUB. OIL (D68XL65)". This part is listed in the LUB. OIL SYSTEM section of the catalog. The manual specifies the exact part number for replacement.
How do you fix yanmar 2TNV70-PTB radiator cap part number unclear in parts order, V-belt size also unconfirmed for cooling system?
Check the Cooling Water System exploded view on page 22. The radiator cap is rated at 0.9 kg/cm²; match that rating to the correct part number in the parts list before ordering. The drive belt is size A35, confirmed on page 23. Verify the Effective Machine Number column to confirm both parts fall within your engine's serial range.
How do you fix oil pressure switch part number hard to confirm without knowing which exploded view reference number applies?
Open the Lub. Oil System parts list on page 20. Locate the oil pressure switch, rated at 0.5 kg, in the numbered exploded view, then match its reference number to the corresponding row in the parts list. Check the Interchangeability Mark column to confirm the part number is valid for your engine's serial range before placing the order.
How will I receive this Yanmar 2TNV70-PTB & variants Parts Catalog?
Immediate download of the complete 40-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Can I print this manual?
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 that includes an OCR layer, which means you can search and copy the full text content from all pages. The text within the parts lists and explanatory sections is consistently crisp and easy to read, ensuring clarity for all information. Diagrams and illustrations are presented as raster images; however, all labels and part numbers within these visuals are clear and legible at various zoom levels. The overall page condition is clean, with no noticeable scan artifacts, stains, or skewed pages, providing a well-preserved and professional presentation.
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