All 38 pages of this Yanmar 4TNE88 Parts Catalog (OEM #Y00B5971) focus on one thing: finding the exact factory part number for your 4TNE88-(E) B1, or EB1 engine. Inside, exploded-view diagrams break down every assembly from cylinder block and gear housing through crankshaft, piston, fuel injection pump, governor, starting motor, and generator. Every component carries its OEM part number and cross-reference so you're placing the right order on the first call, not guessing from a generic description. Order the spring pin at 6x12 mm and the correct main bearing undersize at 0.25 mm by factory code: both are called out exactly as Yanmar built them. Wrong part, wasted day. Download the Yanmar 4TNE88 parts catalog PDF, jump to any assembly with bookmarks, and have the right number in your hand before you reach the parts counter.
What's Inside This Yanmar 4TNE88-(E)B1 / B1 / EB1 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Plugs, Bolts, Camshaft Bush, Main Bearing, Metal Thrust |
| Gear Housing | 5-6 | Oil Seal, Flange, Cover, Gasket, O-Ring |
| Flywheel Housing & Lubrication Oil Sump | 7-8 | Flywheel Housing, Flywheel Cover, Oil Sump, Drain Plug, Oil Seal, Spacer |
| Cylinder Head & Bonnet | 9-10 | Cylinder Head, Valve Guide, Intake Valve, Exhaust Valve, Rocker Arm, Bonnet Assembly, Breather |
| Suction Manifold & Air Cleaner | 11-12 | Suction Silencer, Air Cleaner, Air Cleaner Element, Air Intake Manifold, Manifold Gasket, Air Heater |
| Exhaust Manifold & Silencer | 13-14 | Exhaust Silencer, Silencer Stay, Exhaust Manifold, Manifold Gasket, Bolts, Studs |
| Camshaft & Driving Gear | 15-16 | Camshaft, Camshaft Gear, Camshaft Thrust Metal, Push Rod, Tappet, Idle Gear |
| Crankshaft & Piston | 17-18 | Crankshaft, Flywheel, V-Pulley, Piston, Piston Rings, Connecting Rod |
| Lubrication Oil System | 19-20 | Pump Assy, Lub. Oil, Gasket, L.O. Pump, Guide, Dipstick, Switch, Oil Pressure |
| Cooling Water System | 21-23 | Pump Assy, C.WATER, Gasket, C.W. Pump, V-Pulley, Fan, Cooling, Switch |
| Fuel Injection Pump | 24-25 | Pump W/GOV.& F.PUMP, Camshaft, Plunger W/BARREL, Valve W/SEAT, Deliv., Rack, Control, Pump Assy |
| Fuel Injection Pipe | 26-27 | Valve Assy, F.INJECT, Nozzle Assy, Nut, Nozzle Case, Holder Assy, Nozzle |
| Fuel Pipe | 28-30 | Strainer Assy, Fuel, Valve, Taper, Element, Pipe Assy, Fuel Oil |
| Governor | 31-32 | Case, Link L=30, Weight Assy, Gov., Lever Assy, Shifter, Solenoid |
| Starting Motor | 33-34 | Armatuer, Field Coil Assy, Brush, Holder Assy, Pinion Assy, Clutch Assy |
| Generator | 35-36 | Rotor Assy, Stator Assy, Cover Assy, Rear, Brush Assy, Regulator, Diode Assy, Pulley |
| Gasket Set (Optional) & Tools | 37-38 | Gasket, Cylinder Head, O-Ring, F.I. Pump, Seal, Valve Stem, Protector, Nozzle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Piston Ring Oversize | 0.25 | p. 16 |
| Crankpin Bearing Undersize | 0.25 | p. 16 |
| Main Bearing Undersize | 0.25 | p. 2 |
| Thrust Bearing Size | 0.25 | p. 2 |
| Spring Pin Dimensions | 6x12 mm | p. 8 |
| Nut Thread Specification | M8xP1.0 | p. 8 |
| Oil Pressure Switch Activation | 0.5 kg | p. 18 |
Yanmar 4TNE88-(E)B1 / B1 / EB1 Common Problems This Manual Covers
Cannot find the correct oversize piston components to fix Yanmar 4TNE88 low oil pressure p. 17
Check the Crankshaft & Piston exploded view on page 17. Locate the replacement numbers for the connecting rods and pistons. Verify the correct part numbers for the 0.25 mm oversize piston rings listed on page 16 before ordering your overhaul kit.
Manual Section: Crankshaft & PistonTrouble identifying the correct undersize main bearing replacement parts for loud bottom end bearing noise p. 3
Review the Cylinder Block components on page 3 to find the main bearing and metal thrust part numbers. Use the parts list on page 2 to select the correct 0.25 mm undersize main bearings for your specific engine serial number range.
Manual Section: Cylinder BlockDifficulty locating the replacement sensor part number when the oil pressure warning light stays on p. 19
Check the Lubrication Oil System breakdown on page 19 to locate the oil pressure switch. Identify the correct part number for the switch, which is rated for 0.5 kg activation on page 18. Order the matching gasket to prevent leaks.
Manual Section: Lubrication Oil SystemStruggling to locate correct replacement rear seals and assembly hardware for a heavy flywheel oil leak p. 7
Inspect the Flywheel Housing & Lubrication Oil Sump diagram on page 7 to find the exact rear oil seal part number. Secure the correct replacement 6x12 mm spring pins shown on page 8 to ensure proper alignment during your final housing reassembly process.
Manual Section: Flywheel Housing & Lubrication Oil SumpFrequently Asked Questions
What are the replacement specifications for gasket set?
The manual lists "GASKET SET" with part numbers 729430-92620 and 729430-92621. Various O-rings are also specified, such as "O-RING 1A P-16.0", "O-RING 1A P-32.0", "O-RING 1A S-24.0", and "O-RING 1A S-50.0".
What are the replacement specifications for pistons?
For pistons, the manual lists "PISTON W/RINGS" (part 129001-22081) and "RING SET, PISTON" (part 129001-22500). Oversize specifications are also available, such as "PISTON W/RING OS=.25" (part 129001-22901) and "RING SET O.S=0.25" (part 129001-22950).
How do you fix cannot find the correct oversize piston components to fix Yanmar 4TNE88 low oil pressure?
Check the Crankshaft & Piston exploded view on page 17. Locate the replacement numbers for the connecting rods and pistons. Verify the correct part numbers for the 0.25 mm oversize piston rings listed on page 16 before ordering your overhaul kit.
How do you fix trouble identifying the correct undersize main bearing replacement parts for loud bottom end bearing noise?
Review the Cylinder Block components on page 3 to find the main bearing and metal thrust part numbers. Use the parts list on page 2 to select the correct 0.25 mm undersize main bearings for your specific engine serial number range.
How will I receive this Yanmar 4TNE88, 4TNE88-(E) B1, 4TNE88-EB1?
This is a 38-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this Yanmar 4TNE88, 4TNE88-(E) B1?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy text from every page. All text, including the main content and labels within diagrams, is crisp and easy to read. The diagrams and illustrations are sharp, vector-like images, ensuring clarity at any zoom level, and all labels are clearly legible. Pages are clean with no scan artifacts, marks, or skew, and there are no blank or filler pages present.
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