Part of the Yanmar Parts Manuals.
Every teardown of a small Yanmar diesel ends at the same sticking point: near-identical gaskets, metals, and seals, and only one part number that actually fits your block. This factory parts catalog, Yanmar publication Y00B5141, settles that for the 4TNE88-B1 engine, also listed against model B50-2A. Its 37 pages break the engine into 17 sections of numbered part listings, from Cylinder Block and Crankshaft & Piston through the Fuel Injection Pump, Governor, Starting Motor, and Generator.
At the bench it earns its keep matching the number on a worn plunger, nozzle holder, or main metal to the correct line before you order, instead of losing a week to a part that almost fits. The optional complete gasket set is listed too, so a head job or full reseal goes on order as one line item.
The English-language PDF is 0.63 MB, downloads immediately after purchase, and can be printed page by page for the bench.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 1-3 | Cylinder Block Assy, Camshaft Bush, Main Metal, Main Bearing, Thrust Metal, Cylinder Head Gasket |
| Gear Housing | 4-5 | Gear Housing Assy, Oil Seal, Gears Housing Flange, Lub. Oil Supply Cap, Hydraulic Oil Pump Cover, Gasket, Knock Pipe, Retainer |
| Flywheel Housing & Lub. Oil Sump | 6-7 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Assy, Oil Sump Spacer, Oil Seal Case Assy, Oil Seal |
| Cylinder Head & Bonnet | 8-9 | Cylinder Head Assy, Valve Guide, Intake Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Suc. Manifold & Air Cleaner | 10-11 | Suction Silencer, Air Cleaner Assy, Case, Dust Pan Assy, Element Retainer, Element, Brace Assy, Rubber Seat |
| Exh. Manifold & Silencer | 12-13 | Gasket, Silencer, Silencer Stay, Exhaust Manifold, Mainfold Gasket |
| Camshaft & Driving Gear | 14-15 | Camshaft Assy, Camshaft Gear, Thrust Metal, Push Rod, Tappet, Idle Gear Shaft, Gear W/ Bush, Idle Gear Bush |
| Crankshaft & Piston | 16-17 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-Pulley, Flywheel Assy, Ring Gear, Piston W/ Rings, Piston Ring Set, Piston W/ Ring |
| Lub. Oil System | 18-19 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Dipstick Guide, Lub. Oil Dipstick, Oil Pressure Switch, Gasket, Lub. Oil Pipe Assy, Strainer Bracket |
| Cooling Water System | 20-21 | Cooling Water Pump, Cooling Water Pump Gasket, V-Belt, V-Belt A37, V-Pulley, Cooling Fan, Spacer, Joint PT1 |
| Fuel Injection Pump | 22-24 | Pump W/ Governor & Feed Pump, Camshaft, Thrust Ball Bearing, Cam Shaft Support, Plunger W/ Barrel, Retainer a, Plunger Spring Shoe, Plunger Spring |
| Fuel Injection Pipe | 25-26 | Fuel Injection Valve Assy, Fuel Injection Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer |
| Fuel Pipe | 27-28 | Fuel Strainer Assy, Taper Valve, Taper Valve Spring, Fuel Element, Lever, Strainer Cup, Retaining Ring, Spring |
| Governor | 29-30 | Governor Case, Packing, Cover, Link, Governor Weight Assy, Sleeve, Control Shaft Assy, Shaft Spacer |
| Starting Motor | 31-32 | Starter, Armature Assy, Bearing, Field Coil Assy, Brush, Brush Holder Assy, Brush Spring, Rear Cover |
| Generator | 33-34 | Rotor Assy, Starter Assy, Rear Cover Assy, Regulator Brush Assy, Brush Assy, Fan Side Guide, Diode Assy |
| Gasket Set (Optional) & Tool | 35-37 | Gasket Set, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protecter, Nozzle Seat, Bonnet Gasket, Mainfold Gasket, Lub. Oil Pump Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Parallel Pin Dimensions | 8x16 mm | p. 6 |
| Drain Plug Thread Size | M22 | p. 6 |
| V-Belt Size | A-37 | p. 20 |
