Part of the Yanmar Parts Manuals.
Finding the exact replacement part for your 3TN75L-RB the first time is what these 43 pages are built to do. Every major system carries its own exploded-view diagram and numbered parts list: cylinder block, gear housing, crankshaft and flywheel, piston and connecting rod, fuel injection pump, governor, starting motor, generator, and the full gasket set. Undersized and oversized callouts cover bearings and pistons, and OEM numbers run from a Parallel Pin 8X16 to the fuel injection nozzle holder assembly. Dimensions are spelled out where they matter: M22 drain plug, 7x14 mm camshaft key, 0.25 mm main bearing undersize. No more chasing part numbers across three browser tabs. Bookmarked by system and searchable by keyword, so you download it, find your part, and call in the right number.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Section | 1-2 | Cylinder Block Assy, Main Bearing, Thrust Bearing, Camshaft Bush, Cylinder Head Gasket, Joint PT1 |
| Cylinder Block | 3-4 | Gear Housing Assy, Oil Seal, Lub. Oil Supply Cap, Gears Housing Flange, Hydraulic Oil Pump Cover, Hydraulic Oil Pump Gasket, Gasket, Knock Pipe |
| Gear Housing | 5-6 | Flywheel Housing, Flywheel Cover Cap, Oil Seal Case Assy, Oil Seal, Oil Seal Case Gasket |
| Lub.Oil Sump | 9-10 | Head Bonnet Assy, Breather Cover Assy, Shelter Plate, Breather Baffle, Lub. Oil Supply Cap, Bonnet Gasket, Pipe, Breather Pipe |
| Bonnet | 11-12 | Cylinder Head Assy, Valve Guide, Suction Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Cylinder Head | 13-14 | Suction Manifold, Suction Manifold Gasket, Gasket, Exhaust Manifold, Exhaust Manifold Gasket, Air Heater, Air Heater Gasket |
| Suction & Exhaust Manifold | 15-16 | Tappet, Push Rod, Camshaft Assy, Thrust Bearing, Camshaft Gear, Idle Gear Shaft, Gear W/ Bush, Idle Gear Bush |
| Camshaft & Driving Gear | 17-18 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel W/ Gear, Ring Gear |
| Crankshaft & Flywheel | 19-20 | Piston Assy, Ring Set, Piston W/ Ring, Connecting Rod Assy, Crankpin Bearing, Piston Pin Bush |
| Piston & Connecting Rod | 21-22 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Lub. Oil Dipstick, Dipstick Guide, Oil Strainer Gasket, Gasket, Oil Inlet Pipe Assy, Strainer Bracket |
| Lub.Oil System | 23-24 | Cooling Water Pump Assy, Cooling Water Pump Gasket, V-Belt, V-Pulley, Cooling Fan, Thermo Switch, Gasket, Thermostat Cover |
| Cooling Water System | 25-27 | Pump W/ Governor & Feed Pump, Camshaft, Thrust Ball Bearing, Cam Shaft Support, Plunger W/ Barrel, Retainer a, Plunger Spring Shoe, Plunger Spring |
| Fuel Injection Pump | 28-29 | Fuel Injection Valve Assy, Fuel Injection Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer, Fuel Injection Pipe |
| Fuel Injection Pipe | 30-31 | Fuel Strainer Assy, Taper Valve, Taper Valve Spring, Lever, Strainer Cup, Retaining Ring, Spring, Element |
| Fuel Pipe | 32-33 | Fuel Return Pipe, Joint, Cap, Bend Assy, Check Valve Assy, Round Gasket |
| Fuel Return Pipe | 34-35 | Governor Case, Governor Case Gasket, Governor Case Cover, Case Cover Gasket, Link, Governor Weight Assy, Sleeve, Control Shaft Assy |
| Governor | 36-37 | Starter, Armature Assy, Field Coil Assy, Brush, Rear Cover, Brush Holder Assy, Brush Spring, Clutch Assy |
| Starting Motor | 38-39 | Generator, Plate Assy, Stator, Coupler, Flywheel Assy, Collar, Adjuster |
| Generator | 40-41 | Gasket Set, Cylinder Head Gasket, Hydraulic Oil Pump Gasket, Oil Seal Case Gasket, Bonnet Gasket, Suction Manifold Gasket, Exhaust Manifold Gasket, Lub. Oil Pump Gasket |
| Gasket Set & Tool | 42-43 | Optional, Part Number 977770-01212 |
Every system also includes a diagram.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Bearing Undersize | 0.25 | p. 2 |
| Parallel Pin Dimensions | 8x16 mm | p. 6 |
| Drain Plug Thread Size | M22 | p. 8 |
| Spring Pin Dimensions | 6x12 mm | p. 12 |
| Camshaft Key Dimensions | 7x14 mm | p. 16 |
| Piston Ring Oversize | 0.25 | p. 20 |
| Fuel Filter Dimensions | 90x80 mm | p. 22 |
