Part of the Yanmar Parts Manuals.
Somewhere between pulling the crankshaft and phoning the parts counter, every 4TNE88 rebuild stalls on the same question: which exact part number goes back in. This Yanmar parts catalog, publication Y00B5971, settles it. Thirty-eight pages of numbered parts lists cover the 4TNE88, 4TNE88-B1, 4TNE88-EB1, and 4TNE88-(E) B1 engines, from cylinder block, crankshaft, and pistons through the fuel injection pump, governor, cooling water system, starting motor, and generator.
Every day the engine sits apart on the stand is a day lost, and guessing at bearing shells or gasket sets only adds to it. The catalog lists standard and 0.25 mm undersize main and crankpin bearings, oversize piston rings, and a complete optional gasket set, so you can order the whole bottom end in one call.
It is a compact PDF download, yours to keep, print, and mark up for as long as you run this engine.
What's Inside This Yanmar 4TNE88-(E)B1 / B1 / EB1 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 3-4 | Gear Housing Assy, Oil Seal, Gears Housing Flange, Filler Cover, Hydraulic Oil Pump Cover, Gasket, Knock Pipe, Retainer |
| Gear Housing | 5-6 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Assy, Oil Sump Spacer, Oil Seal Case Assy, Oil Seal |
| Flywheel Housing & Lubrication Oil Sump | 7-8 | Cylinder Head Assy, Valve Guide, Intake Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Nozzle Protecter |
| Cylinder Head & Bonnet | 9-10 | Suction Silencer, Air Cleaner Assy, Dust Pan Assy, Element Retainer, Air Cleaner Baffle, Seal Waser, Element, Strainer Element |
| Suction Manifold & Air Cleaner | 11-12 | Gasket, Silencer, Silencer Stay, Exhaust Manifold, Mainfold Gasket |
| Exhaust Manifold & Silencer | 13-14 | Camshaft Assy, Camshaft Gear, Thrust Metal, Push Rod, Tappet, Idle Gear Shaft, Gear w/ Bush, Idle Gear Bush |
| Camshaft & Driving Gear | 15-16 | Crankshaft Assy, Crankshaft V-pulley, Flywheel Assy, Ring Gear, Piston w/ Rings, Piston Ring Set, Piston w/ Ring, Ring Set |
| Crankshaft & Piston | 17-18 | Lub. Oil Pump Assy, Lub. Oil Pump Gasket, Dipstick Guide, Lub. Oil Dipstick, Oil Pressure Switch, Lub. Oil Switch, Gasket, Lub. Oil Pipe Assy |
| Lubrication Oil System | 19-20 | Cooling Water Pump Assy, Coolant Pump Assy, Cooling Water Pump Gasket, Gasket, Cw Pump Pk, Joint, V-belt A37, V-pulley |
| Cooling Water System | 21-23 | Pump w/ Governor & Feed Pump, Fuel Injection Pump Assy, Camshaft, Thrust Ball Bearing, Cam Shaft Support, Support, Plunger w/ Barrel, Retainer A |
| Fuel Injection Pump | 24-25 | 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 | 26-27 | Fuel Strainer Assy, Taper Valve, Taper Valve Spring, Fuel Element, Lever, Strainer Cup, Retaining Ring, Spring |
| Fuel Pipe | 28-30 | Governor Case, Packing, Cover, Link, Governor Weight Assy, Sleeve, Control Shaft Assy, Shaft Spacer |
| Governor | 31-32 | Starting Motor, Armatuer, Bearing, Field Coil Assy, Brush, Brush Holder Assy, Start Brush Spring, Rear Cover |
| Starting Motor | 33-34 | Generator, Rotor Assy, Stator Assy, Rear Cover Assy, Regulator Brush Assy, Brush Assy, Fan Side Guide, Diode Assy |
| Generator | 35-36 | Gasket Set, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protecter, Nozzle Protector, Nozzle Seat, Bonnet Gasket, Mainfold Gasket |
| 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
Hard starting from injection pump wear
A worn plunger and barrel or a leaking delivery valve turns a good starter into a long-cranking one. The Fuel Injection Pump section lists the plunger with barrel, delivery valve with seat, rack, and complete pump assembly, so you order by part number instead of by guesswork.
Manual Section: Fuel Injection Pump p. 24Bottom end knock and oil consumption
Rod knock or rising oil use usually ends with the crank on the bench and a decision about bearings and rings. This section covers the crankshaft, flywheel, pistons, piston rings, and connecting rods, and the catalog carries 0.25 mm undersize bearing and oversize ring options for a reground or rebored engine.
Manual Section: Crankshaft & Piston p. 17Overheating and coolant loss
A seeping water pump will cook a diesel long before the gauge convinces you to shut down. The Cooling Water System section identifies the coolant pump assembly, fan, V-pulley, switch, and gaskets.
Manual Section: Cooling Water System p. 21Fuel starvation from a clogged strainer
Dirty fuel plugs the strainer element, and the engine surges, loses power, or dies under load. The Fuel Pipe section lists the fuel strainer assembly, element, taper valve, and fuel oil pipe assemblies.
Manual Section: Fuel Pipe p. 28Surging or hunting engine speed
When the engine hunts at idle or will not hold a set speed, worn governor linkage is a common cause. The Governor section identifies the case, links, weight assembly, shifter, lever assembly, and solenoid.
Manual Section: Governor p. 31Slow cranking and starter failure
Brushes and the pinion clutch wear out long before the rest of the starter does. Rather than replacing the whole motor, the Starting Motor section breaks it down to the armature, field coil assembly, brush holder, and the pinion and clutch assemblies.
Manual Section: Starting Motor p. 33Oil leaks at the rear seal
Oil weeping between the engine and whatever it drives usually traces back to the rear oil seal or the drain plug. This section covers the flywheel housing, flywheel cover, oil sump, drain plug, oil seal, and spacer.
Manual Section: Flywheel Housing & Lubrication Oil Sump p. 7Frequently Asked Questions
Which engines does this parts catalog cover?
It covers the Yanmar 4TNE88, 4TNE88-B1, 4TNE88-EB1, and 4TNE88-(E) B1 diesel engines. It is Yanmar publication Y00B5971, 38 pages, in English, organized into 17 sections from Cylinder Block through Gasket Set (Optional) & Tools.
Are undersize bearings and oversize rings listed?
Yes. The Crankshaft & Piston section lists pistons, rings, and connecting rods, with 0.25 mm oversize piston rings and 0.25 mm undersize crankpin bearings cataloged alongside standard sizes. Main bearings and thrust metals appear under Cylinder Block, so a reground crank or rebored block can be ordered for by part number. p. 17
Is this a service manual with procedures and torque specs?
No, this is the factory parts catalog. It identifies parts by Yanmar part number, section by section, from cylinder block to generator. Use it to order the correct components for an overhaul; it does not contain repair procedures, valve lash values, or head torque sequences.
Does it cover the fuel system?
Yes, across three sections: Fuel Injection Pump (pump assembly with governor and feed pump, plunger with barrel, delivery valve), Fuel Injection Pipe (nozzle assemblies, nozzle cases, holders), and Fuel Pipe (strainer, element, fuel lines). The Governor section lists the speed control parts separately. p. 24
What do I get after purchasing this Yanmar 4TNE88 manual?
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.
Is this Yanmar 4TNE88 manual print-friendly?
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.
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