Part of the Yanmar Parts Manuals.
Lay the pistons out on the bench and the first question is not how to measure ring end gap, it is which part number puts fresh rings, crankpin bearings, and gaskets on order without a second teardown. Guess wrong on a bearing or a nozzle assembly and you pay twice: once for the part, again for the downtime while the right one ships.
This PDF parts catalog, Yanmar publication Y00B5422, identifies every component of the 4TNE88-3BY, 3CY, 3CY (B6U), and 4TNE88-3CY diesel engines across 37 pages of numbered part lists, from the cylinder block and crankshaft through the fuel injection pump, governor, starting motor, and generator, ending with the optional gasket set and tools.
Eighteen bookmarked sections mean you land on the Cooling Water System or Fuel Injection Pipe pages in two clicks, confirm the part against the diagram, and get the engine back together.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 1 | |
| Cylinder Block | 2-3 | Block Assy, Cylinder, Plug, Bolt, Main Bearing, Bush Camshaft |
| Gear Housing | 4-5 | Flange, Housing Assy, Gear, Seal Oil, O-Ring, Bolt |
| Flywheel Housing & Oil Sump | 6-7 | Housing, Flywheel, Cap, Flywheel Cover, Sump Assy, Oil, Drain Plug, Case Assy |
| Cylinder Head & Bonnet | 8-9 | Head Assy, Cylinder, Guide Valve, Valve Intake, Valve Exhaust, Shaft Assy, Rocker, Bonnet Assy |
| Suc. Manifold & Air Cleaner | 10-11 | Manifold, Air Intake, Cleaner, Air, Pan Assy, Dust, Case Asy, Air Cleaner |
| Exh. Manifold & Silencer | 12-13 | Manifold, Exhaust, Gasket, EXH.MANIFOLD, Stud, Silencer, Stay |
| Camshaft & Driving Gear | 14-15 | Camshaft Assy, Gear Camshaft, Shaft Idle Gear, Gear W/BUSH, Driving Set, Ho-Pump, Ball Bearing |
| Crankshaft & Piston | 16-17 | Crankshaft Assy, Piston W/RINGS, Connecting Rod, Flywheel Assy, Crankpin Bearing, Piston Pin |
| Lub.Oil System | 18-19 | Pump Assy, Lub. Oil, Dipstick, Oil Filter, Oil Pressure Sender, Oil Pipe |
| Cooling Water System | 20-21 | Pump Assy, C.WATER, V-Belt, Fan, Thermostat, Cooling Water Pipe, Thermostat Case |
| Fuel Injection Pump | 22-23 | Pump Assy, Fuel Inj., Plunger, Delivery Valve, Control Rack, Fuel Feed Pump, Governor |
| Governor | 24-25 | Lever Assy, Control Shaft, Spring, Stop Solenoid, Control Lever |
| Fuel Injection Pipe | 26-27 | Nozzle Assy, Nozzle Holder, Nozzle Spring, Fuel Return Pipe, Check Valve |
| Fuel Pipe | 28-29 | Fuel Strainer, Taper Valve, Fuel Element, Fuel Pump, Joint, Fuel Oil Pipe |
| Starting Motor | 30-32 | Armature Assy, Brush Holder, Pinion Assy, Clutch Assy, Magnetic Switch |
| Generator | 33-34 | Rotor Assy, Ball Bearing, Brush Assy, Regulator, Diode Assy, Pulley |
| Gasket Set (Optional) & Tool | 35-37 | Gasket, Cylinder Head, O-Ring, Seal, Valve Stem, Liquid, Wrench |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Pipe, Knock Length | 18 inches | p. 4 |
| Nut size | M8 | p. 4 |
| Drain Plug size | M22 | p. 6 |
| V-Belt type | A37 | p. 20 |
| Filter dimensions | 80x80L | p. 18 |
| Bolt W/Washer M8 | M8 x 70 mm | p. 28 |
