Part of the Yanmar Parts Manuals.
A 4TNV88-XBV rebuild rarely stalls on skill. It stalls at the parts counter, when the supplier asks for a number you do not have and the crankshaft is still sitting in a tray of solvent. Yanmar publication Y00B7080 exists to end that conversation: the factory parts catalog for the 4TNV88-XBV, 34 pages of exploded views and part numbers straight from the manufacturer.
Every group is broken out by system: cylinder block, cylinder head and bonnet, camshaft and driving gear, crankshaft and piston, the lube oil and cooling water systems, fuel injection pump, injection valves and fuel line, starting motor, generator, and the full gasket set with tools. It also lists service sizes, including 0.25 undersize main and thrust metal and 0.25 oversize pistons and ring sets.
Because it is a small PDF, well under a megabyte, it lives on your phone or laptop and follows the engine, whether that engine sits in a chassis or on a stand.
What's Inside This Yanmar 4TNV88-XBV Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine Section 4TNV88-XBV | 1 | Cylinder Block, Gear Housing, Flywheel Housing & Oil Sump, Cylinder Head & Bonnet, Suction Manifold, Exhaust Manifold, Camshaft & Driving Gear, Crankshaft & Piston |
| Gasket Set & Tools | 32-34 | Gasket Set, Cylinder Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Cover Gasket, Exhaust Manifold Gasket, Silencer Gasket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Metal Undersize | 0.25 | p. 2 |
| Thrust Metal Undersize | 0.25 | p. 2 |
| O-Ring Size | P16 | p. 4 |
| Drain Plug Size | M22 | p. 6 |
| Nut Size | M8XP1.0 | p. 8 |
| Piston W/Ring Oversize | 0.25 | p. 16 |
| Ring Set Oversize | 0.25 | p. 16 |
| L.O. Switch Setting | 0.5KG | p. 18 |
Yanmar 4TNV88-XBV Common Problems This Manual Covers
Running on three cylinders
A dead cylinder on a 4TNV88 usually traces back to an injector that has stopped atomizing, and owners report swapping injectors more than any other fix. The Fuel Injection Valve section gives you the exploded view and part numbers for the complete injector assembly so you order the right nozzle the first time.
Manual Section: Fuel Injection Valve p. 12Unburnt fuel and rough combustion
Raw fuel showing up where it should not, paired with rough running, points at the injection pump metering incorrectly. The Fuel Injection Pump section breaks the pump down into its serviceable parts so you can identify and replace what is worn instead of guessing at an assembly swap.
Manual Section: Fuel Injection Pump p. 11Worn journals and cylinder bores
When crank journals or bores measure outside limits, this catalog lists the factory service sizes: 0.25 undersize main and thrust metal, and 0.25 oversize pistons with rings and matching ring sets. That tells you exactly which numbers to order before the machine shop calls back with the cut dimensions.
Manual Section: Crankshaft & Piston p. 8Low oil pressure at idle
Falling oil pressure on a worn 4TNV88 sends you into the lube circuit for the pump, relief components, and the pressure switch. The Lub.Oil System section identifies every part in that circuit by number so you can replace the whole path in one order.
Manual Section: Lub.Oil System p. 9Overheating and coolant loss
Coolant leaks and creeping temperature usually mean the water pump or thermostat hardware is due. The Cooling Water System section lays out the pump, fittings, and related parts in an exploded view so nothing gets left off the order.
Manual Section: Cooling Water System p. 10Slow cranking or dead starter
Starters are among the most replaced items on this engine, and matching the correct unit and mounting hardware matters. The Starting Motor section gives the factory part numbers for the motor and its associated pieces.
Manual Section: Starting Motor p. 14Resealing the engine after teardown
Once the head is off, you need the cylinder head gasket, valve stem seals, exhaust manifold gasket, and the injection pump O-ring, all at once. The Gasket Set & Tools section lists the full gasket set and the special tools by part number so the reseal happens in one pass.
Manual Section: Gasket Set & Tools p. 16Frequently Asked Questions
Which engine does this parts catalog cover?
It covers the Yanmar 4TNV88-XBV engine specifically. This is Yanmar publication Y00B7080, a 34-page factory parts catalog organized by system, from cylinder block through fuel injection, starting motor, generator, and gasket set.
Does it list undersize bearings and oversize pistons?
Yes. The Crankshaft & Piston section lists 0.25 undersize main metal and thrust metal, plus 0.25 oversize pistons with rings and matching ring sets, so you can order rebuild parts to the sizes your machine shop cuts. p. 8
Are fuel system parts covered?
Yes. The Fuel Injection Pump section covers the pump and its components, and separate Fuel Injection Valve and Fuel Line sections cover the injectors and plumbing, each with exploded views and part numbers. p. 11
How quickly can I access this manual after buying?
Instant PDF download. You get the full 34-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print specific sections of this Yanmar 4TNV88-XBV Parts Catalog?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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