Hunting down the right component for your Yanmar 4TNE84T-SA, 4TNE84T-G1A, or 4TNE84T-G2A? This 34-page OEM parts catalog (Y00R4551) maps every assembly in the turbocharged diesel: cylinder block, gear housing, flywheel, crankshaft, piston, camshaft, cooling water system, and the full electrical side including starter, generator, and wire harness. Inside you get exploded views with factory part numbers covering fuel injection nozzle assemblies, turbocharger components, governor linkage, lub oil system, and the non-asbestos cylinder head gasket set, listed exactly as Gasket SET(NON-ASB.) in the OEM documentation. Each exploded view cross-references all three engine variants so you order the number for your specific configuration, not a best guess pulled from a generic listing. Ordering the wrong part because your variant wasn't distinguished costs you days. Bookmarked by assembly; search by keyword and jump directly to the exploded view you need, right from your phone on the shop floor.
What's Inside This Yanmar 4TNE84T-SA / G1A / G2A Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Parts Number Index | 1 | Master Part Number Reference List |
| Cylinder Block | 4-5 | Block Assembly, Cylinder Bore |
| Gear Housing & Flywheel | 6-8 | Gear Train, Flywheel Housing |
| Cylinder Head & Bonnet | 9-12 | Head Assembly, Valves, Bonnet |
| Camshaft & Driving Gear | 13-14 | Camshaft, Timing Drive |
| Crankshaft & Piston | 15-16 | Crankshaft, Connecting Rod, Piston |
| Turbocharger Assembly | 17 | Turbocharger (Tc) Parts |
| Lub. Oil System | 18-19 | Oil Pump, Oil Filter, Oil Strainer |
| Cooling Water System | 13 | Water Pump, Impeller, Housing, Seal |
| Fuel Injection System | 22 | Valve Assy F.INJECT, Nozzle Assy, Holder Assy, Injection Pipe |
| Fuel Strainer Assembly | 23 | Strainer Assy, Element (Fuel), Cup (Strainer), Taper Valve |
| Governor Assembly | 24 | Link, Governor, Regulator Assy, Shaft, Driving Gear |
| Starting Motor (Type a) | 25-26 | Starter Assy, Armature, Clutch Assy, Pinion, Switch Assy |
| Starting Motor (Type B) | 27-29 | Alternate Starter, Armature, Clutch, Pinion, Switch Assy |
| Generator (Alternator) | 30 | Rotor Assy, Stator Assy, Brush Assy, Regulator, V-Belt |
| Electrical & Wiring Harness | 31-32 | Harness, Wire, Instrument Panel, Thermometer, SA/G1A/G2A Variants |
| Gasket Set | 33 | Gasket Set (Non-Asb.), CYL.HEAD Gasket, Valve Stem Seals, O-Rings, Nozzle Protector |
| Miscellaneous & Labels | 34 | Labels, Miscellaneous Hardware |
Yanmar 4TNE84T-SA / G1A / G2A Common Problems This Manual Covers
Yanmar 4TNE84T-SA fuel injector nozzle assembly part number needed, replacing 4th cylinder injector tip p. 22
Check the fuel injection exploded view on page 22. Parts are listed individually: Nozzle Assy, Holder Assy, and complete Valve Assy, F.INJECT. Confirm whether you need the full assembly or just the nozzle tip, then verify part number applicability against the parts number list on page 1 before ordering.
Manual Section: Fuel Injection PartsGrid heater assembly part number needed — this engine uses an intake grid heater, not glow plugs p. 20
Turn to the electrical parts section on page 20. This engine uses an intake grid heater instead of individual glow plugs. Locate the heater assembly in the listings and record the part number. Confirm your variant (SA, G1A, or G2A) before ordering, as harness and panel components on page 31 may differ by configuration.
Manual Section: Electrical PartsFuel strainer element and cup part numbers unclear when ordering complete fuel filter service kit p. 23
Open to page 23 for the fuel strainer assembly breakdown. Components are listed separately: Strainer Assy, Element (Fuel), Cup (Strainer), and Taper Valve. For a standard service, order the Element and Cup at minimum. Add the Taper Valve if the seat shows wear. Cross-reference part numbers against the master list on page 1 to catch any supersessions.
Manual Section: Fuel Strainer AssemblyCylinder head gasket set part number unknown, need complete list including valve stem seals and O-rings p. 33
Check page 33 for the full gasket set listing. You will find Gasket SET (NON-ASB.), Gasket CYL.HEAD, Valve Stem Seals, O-Rings, and Nozzle Protector listed individually. Order the complete set rather than individual pieces to avoid missing secondary seals. Verify your model variant against the parts number list on page 1 before placing the order.
Manual Section: Gasket Set / Cylinder HeadCooling system water pump part number needed, unclear if impeller and housing are ordered separately p. 13
Turn to the cooling system parts section on page 13. Components are broken out individually in the exploded view, so identify the specific failed item (impeller, housing, or seal) before ordering. For a preventive overhaul, locate all sub-components listed in that section and order as a set. Confirm part numbers against the master index on page 1.
Manual Section: Cooling System PartsStarter assembly pinion or clutch part number unknown, need correct sub-component for bench rebuild p. 25
Check pages 25-26 for one starter variant or pages 27-29 for the alternate assembly used in this engine family. Both sections list Armature Assy, Clutch Assy, Pinion, and Switch Assy as separate line items. Identify your starter type by housing configuration, then locate the failed sub-part in the corresponding exploded view and record the exact part number.
Manual Section: Starter AssemblyFrequently Asked Questions
How do you find the Yanmar 4TNE84T-SA fuel injector nozzle assembly part number when replacing the 4th cylinder injector tip?
Check the fuel injection exploded view on page 22. Parts are listed individually: Nozzle Assy, Holder Assy, and complete Valve Assy, F.INJECT. Confirm whether you need the full assembly or just the nozzle tip, then verify part number applicability against the parts number list on page 1 before ordering.
How do you locate the grid heater assembly part number for this engine — it uses an intake grid heater, not glow plugs?
Turn to the electrical parts section on page 20. This engine uses an intake grid heater instead of individual glow plugs. Locate the heater assembly in the listings and record the part number. Confirm your variant (SA, G1A, or G2A) before ordering, as harness and panel components on page 31 may differ by configuration.
How do you find fuel strainer element and cup part numbers when ordering a complete fuel filter service kit?
Open to page 23 for the fuel strainer assembly breakdown. Components are listed separately: Strainer Assy, Element (Fuel), Cup (Strainer), and Taper Valve. For a standard service, order the Element and Cup at minimum. Add the Taper Valve if the seat shows wear. Cross-reference part numbers against the master list on page 1 to catch any supersessions.
How do you find the cylinder head gasket set part number and get a complete list including valve stem seals and O-rings?
Check page 33 for the full gasket set listing. You will find Gasket SET (NON-ASB.), Gasket CYL.HEAD, Valve Stem Seals, O-Rings, and Nozzle Protector listed individually. Order the complete set rather than individual pieces to avoid missing secondary seals. Verify your model variant against the parts number list on page 1 before placing the order.
What do I get after purchasing this Yanmar 4TNE84T-SA, 4TNE84T-G1A?
A 34-page Parts Catalog in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this Yanmar 4TNE84T-SA, 4TNE84T-G1A?
Yes — the PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works fine.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text is generally crisp and readable, though some characters show minor imperfections typical of optical character recognition. All diagrams and illustrations are raster images, meaning labels are clear at normal viewing but will pixelate if zoomed in significantly. The pages are clean and free from any notable scan artifacts, stains, marks, or skewed content. There are no blank or filler pages present in the document.
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