Part of the Yanmar Parts Manuals.
All 48 pages of this Yanmar 4TNV98T-ZXWTB Parts Catalog (OEM #P-TB285EAC) map every component on this turbocharged diesel engine, from cylinder block to the Electronic Control Unit. Inside, you get exploded-view figures for every system: crankshaft and piston assemblies, fuel injection pump and governor, turbocharger, cooling water system, starting motor, alternator, and the complete gasket set. Each figure carries factory part numbers so you can cross-reference the exact component before you call the dealer. Part dimensions are listed right alongside: the flywheel housing calls for an M10x35 bolt, the gear housing O-ring is spec'd P-7.0, and the cylinder head takes a PT1/4 plug thread. No more describing parts to the counter and hoping someone guesses right. Bookmarked by system and searchable by keyword; grab your tablet, walk up to the engine, and find the exact part number before you even pick up the phone.
What's Inside This Yanmar 4TNV98T-ZXWTB, P-TB285EAC Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Cylinder Block | 6-7 | Assy, Plug, Bolt, Bush, Bearing, Gasket |
| Gear Housing | 8-9 | Case, Gear, Pump Assy, O-Ring, Cover, Seal |
| Flywheel Housing & Oil Sump | 10-11 | Housing, Plug, Bolt, Seal, Oil Pan Assy, Washer |
| Cylinder Head & Bonnet (4TNV98T-Zxwtb) | 12-13 | Head Assy, Cylinder, Valve, Spring, Retainer, Arm, Rocker |
| Suction Manifold | 14-15 | Gasket, Manifold Assy, Valve, Spacer, Duct, Heater |
| Exhaust Manifold & Silencer | 16-17 | Manifold Assy, Manifold, Gasket, Cooler, Pipe, Silencer |
| Camshaft & Driving Gear | 18-19 | Tappet, Push Rod, Camshaft Assy, Bearing, Gear, Shaft |
| Turbine | 20-21 | Turbocharger Assy, Gasket, Nut |
| Crankshaft & Piston | 22-23 | Crankshaft Assy, Gear, Piston Assy, Ring Set, Rod Assy, Bearing |
| Lub.Oil System | 24-25 | Cooler Assy, Pipe, Elbow, Dipstick, Filter, O-Ring |
| Lub.Oil Line | 26-27 | Pipe Assy, Retainer, Joint Bolt, Gasket, Clamp, Valve Assy |
| Cooling Water System | 28-29 | Pump Assy, V-Belt, Fan, Thermostat, Pipe, Tank Assy |
| Fuel Injection Pump | 30-31 | Injecton Pump Assy, Valve Assy, Timer Set, Piston, Harness Assy, O-Ring |
| Governor | 32-33 | Plug, Gasket, Sensor, O-Ring, Gear, Nut |
| Fuel Injection Valve | 34-35 | Valve Assy, Injection, Nozzle Assy, Spring, Shim Set, Pipe Assy |
| Fuel Line | 36-37 | Filter, Pipe Assy, Clip, Tube, Joint, Element Kit |
| Starting Motor | 38-39 | Starter, Armature Assy, Coil Assy, Brush, Gear Case, Pinion Assy |
| Generator | 40-41 | Alternator, Rotor Assy, Ball Bearing, Bracket, Pully, Relay |
| Electronic Control Unit (ECU) | 42-43 | ECU Cmp, Shield, Collar, Absorber |
| Gasket Set | 44-48 | Gasket, O-Ring, Washer, Seal, Protector |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Spring Pin Dimension | 6x12mm | p. 7 |
| O-Ring Dimension (1A) | P-7.0 | p. 9 |
| Plug Thread Spec | PT1/4 | p. 13 |
| Nut Thread Spec | M8 | p. 13 |
| Pipe Dimension | 16x600mm | p. 13 |
Yanmar 4TNV98T-ZXWTB, P-TB285EAC Common Problems This Manual Covers
Turbocharger assembly part number unclear, unsure if gasket and nuts are included or sold separately
Refer to the Turbine section starting on page 20. The Turbocharger Assy, Gasket, and Nut are listed as individual line items — the assembly does not include hardware. Order the Gasket and Nut separately when replacing the turbo unit, and confirm part numbers match your serial number range.
Manual Section: Turbine p. 20Water pump assembly and thermostat part numbers needed for cooling system overhaul
Open the Cooling Water System diagram on page 28. The Pump Assy, Thermostat, V-Belt, and Fan are all listed individually. Pull part numbers for each component you plan to replace and note the Pipe and Tank Assy entries if hoses or the expansion tank are also being sourced.
Manual Section: Cooling Water System p. 28Injection nozzle and shim set part numbers confusing across fuel injection valve listings
Go to the Fuel Injection Valve section on page 34. The Nozzle Assy, Spring, and Shim Set are separate catalog entries — shims are sold as a set, not individually. Record the Valve Assy part number first, then cross-check the Shim Set and Pipe Assy line items to build a complete order for the injection valve service.
Manual Section: Fuel Injection Valve p. 34ECU component part number needed but unsure which sub-parts are cataloged separately
Check the Electronic Control Unit section on page 42. The ECU Cmp (component), Shield, Collar, and Absorber are listed as individual line items — the ECU is not sold as a single bundled kit. Note the Shield and Absorber part numbers alongside the ECU Cmp if you're sourcing a full replacement assembly, and always specify engine model and serial number when ordering.
Manual Section: Electronic Control Unit (ECU) p. 42Frequently Asked Questions
What are the replacement specifications for Fuel filters?
The replacement specification for the fuel filter is identified by part number Y129907-55801. An ELEMENT KIT for the fuel filter is also listed with part number Y129917-55850. p. 37
What are the replacement specifications for Oil filters?
The replacement specification for the oil filter is identified by part number Y129150-35153. This part is described as a "FILTER 80X80L" in the Lub.Oil System section. p. 25
How do you fix yanmar 4TNV98T-ZXWTB fuel filter element kit part number hard to locate in catalog?
Turn to the Fuel Line exploded view on page 36. The filter assembly and element kit are listed separately — locate the Element Kit line item and note its part number before ordering. Cross-reference the parts index to confirm the kit matches your engine serial number range, as ZXWTB application catalogs differ from standard 4TNV98T variants. p. 36
How do you fix can't identify correct oil filter part number or cooler assembly for lubrication system service?
Check the Lub. Oil System diagram on page 24. The Filter and Cooler Assy are listed as separate line items — note both part numbers if you're doing a full lube service. Verify the O-ring specs on the cooler connections before ordering to avoid mismatched seals. p. 24
Is this Yanmar 4TNV98T-ZXWTB manual a download or a disc?
This is a 48-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.
Can I print this manual?
There are no print restrictions — the PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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