Need the exact OEM part numbers for your Yanmar 3TNV76-XTB engine? All 42 pages of this Parts Catalog cover the TB20R, TB23R, and P-TB23REAB in factory detail, with exploded views and numbered parts lists for every assembly from cylinder block to gasket sets. Inside, you get 18 complete system sections: crankshaft and piston assemblies, fuel injection pump with plunger and delivery valve callouts, governor components down to shim sets and solenoids, starter motor internals, and the full alternator assembly. Cross-reference electrical parts, hydraulic pump components, and cooling system pieces by OEM number without guessing. The crankshaft flange bolt is M12xP1.25; the oil pressure switch is set at 0.5 kg. Your machine is down and the wrong part adds another day of downtime. Bookmarked and searchable, jump straight to Fuel Line or Gear Housing and order the right piece the first time.
What's Inside This Yanmar 3TNV76-XTB (TB20R / TB23R) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 4-5 | Block Assy, Cylinder, Plug, Bolt, Bush, Camshaft, Main Bearing Set, Gasket |
| Gear Housing | 6-7 | Case, Gear, Cover Assy, Gear Case, Cover, LUB.OIL Pump, Valve, Relief |
| Flywheel Housing & Oil Sump | 8-9 | Housing, Flywheel, Cap, Flywheel Cover, Seal, Oil, Sump Assy, LUB.OIL |
| Cylinder Head & Bonnet | 10-11 | Head Assy, Cylinder, Valve, Intake, Exhaust, Shaft Assy, Rocker |
| Exhaust Manifold & Silencer | 12-13 | Manifold, Exhaust, Gasket, Silencer, Stud, Bolt |
| Camshaft & Driving Gear | 14-15 | Tappet, Rod, Push, Camshft Assy, Shaft, Idle Gear, Gear Assy, Idle |
| Crankshaft & Piston | 16-17 | Crankshaft Assy, Gear, Crankshaft, Flywheel Assy, Piston W/RING, Ring Set, Rod Assy, Connecting |
| Hydraulic Pump | 18-19 | Gear Assy, Pump, Ball Bearing, Gasket, Seal Washer, Bolt, Pump Assy, Hyd. Oil |
| Lub.Oil System | 20-21 | Dipstick, Filter, Oil Pipe, Switch, Joint Bolt, Seal Washer |
| Cooling Water System | 22-23 | Water Pump, V-Pulley, V-Belt, Cooling Fan, Thermostat, Temperature Sensor |
| Radiator & Air Cleaner | 24-25 | Radiator, Sub-Tank, Air Cleaner, Air Filter Element, Vacuum Valve, Indicator Kit |
| Fuel Injection Pump | 26-27 | Assembly, Plunger, Control Rack, Delivery Valve, Camshaft, Shim Pack |
| Governor | 28-30 | Case, Control Lever, Spring, Shim Set, Solenoid, Weight |
| Fuel Injection Valve | 31 | Injection Valve, Nozzle, Injection Pipe, Return Pipe, Check Valve, Clamp |
| Fuel Line | 32-33 | Fuel Strainer, Fuel Filter, Fuel Feed Pump, Water Separator, Fuel Pipe, Bend |
| Starting Motor | 34-35 | Starter Motor, Armature, Clutch, Housing, Field Coil, Switch |
| Generator | 36-37 | Alternator, Rotor Assy, Flame Assy, Drive, Holder, Brush, Regulator Assy, Relay |
| Gasket Set | 38-42 | Gasket, CYL.HEAD, O-Ring, F.I.PUMP, Seal, Valve Stem, Manifold |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Crankshaft Flange Bolt Thread/Pitch | M12xP1.25 | p. 17 |
| Lub.Oil System Pressure Switch Setting | 0.5kg | p. 21 |
| Radiator Hose Dimensions | 7x225mm | p. 25 |
| Fuel Injection Valve Bolt Thread/Length | M4x14mm | p. 31 |
Yanmar 3TNV76-XTB (TB20R / TB23R) Common Problems This Manual Covers
Yanmar 3TNV76-XTB fuel injection nozzle and return pipe part numbers after suspected contamination event p. 31
Find the Fuel Injection Valve diagram on page 31. The nozzle body, injection valve, return pipe, check valve, and injection pipe are each listed as separate line items. Two hex socket bolts at M4x14mm secure the clamp holding the valve in place. Order the nozzle and return pipe together when contamination has reached the injection side.
Manual Section: Fuel Injection ValveCorrect piston ring set part number when cylinder bore is worn and oversized rings are needed p. 16
Pull the Crankshaft & Piston parts list starting on page 16. Ring sets are listed with standard and oversized options as separate part numbers. While you are there, note the crankshaft flange bolt (M12xP1.25 thread) on page 17, since it is commonly disturbed when accessing the flywheel. Confirm the oversized ring code against your bore measurement before placing the order.
Manual Section: Crankshaft & PistonOil pressure warning switch part number and oil pipe fittings when replacing low-pressure circuit components p. 20
Check the Lub.Oil System diagram on page 20. The dipstick, oil filter, oil pipe, pressure switch, joint bolt, and seal washer are all listed individually. The pressure switch is rated at 0.5 kg and appears with its part number on page 21. Order seal washers alongside any joint bolt to avoid pulling the assembly twice.
Manual Section: Lub.Oil SystemRadiator sub-tank and correct hose part number when coolant system components need replacement p. 24
Open the Radiator & Air Cleaner diagram on page 24. The radiator, sub-tank, and vacuum valve are listed alongside hose and indicator kit part numbers. The replacement radiator hose is 7x225mm as noted on page 25. Also pull the air filter element part number from the same section if the air cleaner housing is being serviced at the same time.
Manual Section: Radiator & Air CleanerFrequently Asked Questions
What are the replacement specifications for fuel injection pump?
The fuel injection pump assembly for the Yanmar 3TNV76-XTB engine is identified by part number Y719740-51370. This assembly includes various components such as the plunger assembly (part number Y119740-51100) and other related parts listed in the catalog.
What are the replacement specifications for fuel injection valve?
The fuel injection valve assembly for the Yanmar 3TNV76-XTB engine has a part number of Y119717-53000. This assembly consists of several parts, including the nozzle assembly (part number Y119717-53010) and the holder, nozzle (part number Y118200-53010).
How do you fix yanmar 3TNV76-XTB fuel injection nozzle and return pipe part numbers after suspected contamination event?
Find the Fuel Injection Valve diagram on page 31. The nozzle body, injection valve, return pipe, check valve, and injection pipe are each listed as separate line items. Two hex socket bolts at M4x14mm secure the clamp holding the valve in place. Order the nozzle and return pipe together when contamination has reached the injection side.
How do you fix correct piston ring set part number when cylinder bore is worn and oversized rings are needed?
Pull the Crankshaft & Piston parts list starting on page 16. Ring sets are listed with standard and oversized options as separate part numbers. While you are there, note the crankshaft flange bolt (M12xP1.25 thread) on page 17, since it is commonly disturbed when accessing the flywheel. Confirm the oversized ring code against your bore measurement before placing the order.
What format is this manual in?
Immediate download of the complete 42-page searchable Parts Catalog. 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 Yanmar TB20R/23R 3TNV76-XTB & variants?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy text throughout. The text quality is generally crisp and readable, though some smaller labels within diagrams may appear slightly pixelated. All diagrams and illustrations are raster images, which means they will lose sharpness if zoomed in extensively, but their labels remain readable. Pages are clean with no notable stains or marks, and there is one blank "Memo" page included.
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