Reliable Sourcing for Yanmar 4TNE92 Piston Assembly

When performing an engine overhaul, precision is everything. Our 129004-22120 Piston (also searched as 12900422120) and 129004-22050 Piston Pin (12900422050) are designed to restore your 4TNE92 engine to its peak performance. We understand that repair shops and fleet owners need parts that fit the first time without compromising on durability.

Whether you are dealing with engine blow-by or cylinder pressure loss, selecting an OEM Standard Replacement is the most cost-effective way to ensure long-term reliability. We specialize in providing complete engine kits, commonly known as the "Four Matching" (Piston, Ring, Liner, Pin), ensuring perfect compatibility between components.

Technical Specifications & Compatibility Table

Below is the detailed compatibility guide for the 4TNE and 4TNV series engines. Ensure your part numbers match before purchasing.

Product Information Summary

Efficient logistics and standardized quality for global procurement.

• Model NO: 4TNE92 / 4TNV94 / 4TNE94 / 4TNV98 / 4TNE98

• Product Name: Piston Kit / Engine Rebuild Kit / Liner Kit

• Part Number: 129004-22120, 129004-22050 (and related series)

• Condition: Brand New, OEM Standard Replacement

• Payment Terms: T/T, Western Union, MoneyGram

• Delivery Methods: Express (DHL, Fedex, EMS, UPS), Air, or Sea

• MOQ: 1 Piece

• Stock Status: In Stock / Fast Dispatch

• Packaging: Industrial Export Packing

• Application: Engine rebuild, overhaul, maintenance

Procurement Comparison: Why Professionals Choose Us

Troubleshooting 4TNE92 Engine Issues (FAQ)

Q1: Why is my 4TNE92 engine emitting blue smoke and losing power?
       A: This usually indicates worn piston rings or a damaged 129004-22120 piston. When the clearance between the piston and liner exceeds limits, oil enters the combustion chamber. Replacing the full kit is the recommended solution.

Q2: What causes the piston pin 129004-22050 to make a knocking sound?
       A: Insufficient lubrication or excessive hours can wear the pin and bushing. If you hear a high-pitched metallic knock that increases with engine speed, inspect the pin and connecting rod immediately to prevent catastrophic engine failure.

Q3: Why Choose This Piston Kit?
       A: Our products feature an OEM-standard tri-metal structure. They are trusted by professional repair shops and heavy equipment fleets worldwide for their durability in harsh construction environments.

Technical Advisory Section

Not sure how this issue affects your equipment? Our team helps operators:

• ✔ Identify potential risks during maintenance

• ✔ Recommend suitable replacement parts if needed

• ✔ Support both inspection advice and parts supply

Early detection of piston wear can save you thousands in crankshaft and cylinder head repairs. Contact our technical desk for a free part number verification.