Part of the Yanmar Parts Manuals.
Tracking down the exact replacement numbers for your engine is straightforward with this 38-page Yanmar TB015, 3TNA72L-UTBZ parts catalog PDF. Inside, you get detailed exploded diagrams showing every individual component of the cylinder block, gear housing, and fuel injection pump assemblies. Open this complete reference to find full parts lists with exact OEM numbers for the entire cooling water system, governor, and optional gasket sets. Verify the main bearing undersize is listed at 0.25US and confirm you are ordering the correct 71°C thermostat for your specific machine. Stop wasting days waiting on the wrong components to arrive from generic diagrams. This bookmarked file jumps straight to the system you need, so you can grab the correct part number and get your equipment back in the dirt.
What's Inside This Yanmar 3TNA72L-UTBZ Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 11 | Block Assy, Cylinder, Plug PT1/4, Bolt, Main Bearing, Bearing, Thrust, Gasket |
| Gear Housing | 12 | Cover Assy, Housing, Oil Seal, O-Ring, Bolt, Housing Assy, Gear, Gasket |
| Mounting Flange & Lub.Oil Sump | 13 | Parallel Pin, Housing, Flywheel, Bolt, Oil Seal Case, Lub. Oil Sump Assy, Drain Plug |
| Cylinder Head & Bonnet | 14 | Head Assy, Cylinder, Valve Guide, Valve, Suction, Valve Spring, Valve Stem Seal, Bonnet Assy |
| Suc.Manifold $Air Cleaner | 15 | |
| Exh.Manifold &Silencer | 16 | |
| Camshaft & Driving Gear | 17 | Tappet, Push Rod, Camshaft Assy, Camshaft Gear, Idle Gear, Fuel Cam Assy |
| Crankshaft & Piston | 18 | Crankshaft Assy, Crankshaft Gear, Flywheel Assy, Piston W/RINGS, Connecting Rod Assy, Crankpin Bearing |
| Lub.Oil System | 19 | Pump Assy, Lub. Oil, Dipstick, Oil Filter, Oil Press Valve, LUB.OIL Pipe, Oil Pressure Switch |
| Cooling Water System | 20 | Cw Pump, V-Belt, Fan, Thermostat, Radiator, Water Pipe |
| Fuel Oil Injection Pump | 21 | F.INJECT. Pump, Plunger, Delivery Valve, Rack, Pinion, Tappet |
| Governor | 22 | Case, Driving Set, Weight, Lever, Regulator Shaft, Torque Spring |
| Fuel Oil Injection Valve | 23 | Nozzle Assy, F.INJECT., Valve Holder, Injection Pipe, Fuel Over Pipe, Fuel Return Pipe |
| Fuel Oil Pipe | 24 | Pipe Joint, Fuel Strainer, Fuel Element, Water Separator, Feed Pump |
| Starting Motor | 25 | Starter, Armature Assy, Clutch, Pinion, Housing, Magnetic Switch |
| Generator | 26 | Stator, Coupler, Flywheel, Belt Adjuster, Charging Indicator |
| Gasket Set(Optional) | 27 | Gasket, Cyl. Head, (Non-ASB.), Seal, Valve Stem, Protector, Nozzle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Thermostat operating temperature | 71°C | p. 20 |
| Main Bearing Undersize | 0.25US | p. 11 |
| Spring Pin dimensions | 4X10 mm | p. 12 |
| Parallel Pin dimensions | 8X16 mm | p. 13 |
| Seal Washer size | 22S | p. 13 |
| Vinyl Pipe dimensions | 12X 500 mm | p. 14 |
| Thermostat opening temperature | 71°C | p. 20 |
