Description
Overview:
This genuine Yanmar piston with ring (MPN 129005-22900) is designed to restore correct compression and performance in Yanmar TNV-series diesel engines, including the 3TNV88 and 4TNV88. The piston is precision-made to Yanmar specifications for a dependable fit and consistent operation in tough working conditions. Manufactured from durable, heat-resistant materials typical of modern diesel pistons, it is supplied with the matching ring to help seal the combustion chamber and reduce blow-by. Ideal for maintenance or overhaul work on plant, agricultural, and groundcare machinery powered by these engines, it helps maintain power output, fuel efficiency, and emissions control. Use as a direct replacement for worn or damaged components to extend engine life and reliability.
Key Features:
- Genuine Yanmar part for assured compatibility and quality (129005-22900)
- Supplied with piston and ring to maintain compression and oil control
- Precision-machined for consistent sealing and smooth operation
- Durable construction suited to high thermal and mechanical loads in diesel use
- Helps restore starting performance, power delivery, and fuel efficiency
- Direct-fit replacement for TNV88 family engines listed below, reducing downtime
- Suitable for demanding site and fleet environments with regular duty cycles
- One piston is required per cylinder; check engine cylinder count before ordering
Typical Applications:
Used during routine rebuilds or repairs of Yanmar-powered equipment such as compact excavators, site dumpers, skid-steer loaders, generators, water pumps, compressors, and groundcare machinery. Ideal where engines show low compression, excessive oil consumption, smoke, or reduced output, helping bring engines back within specification and improving overall reliability.
Also known as:
Engine piston, cylinder piston, piston assembly, piston with ring, piston kit (single piston), replacement piston for Yanmar TNV88 series, diesel piston component.
Fits Models:
3TNV88
3TNV88-BPTB2
3TNV88-BPTS
3TNV88-MWA
3TNV88-XTBZ
3TNV88-XWA
3TNV88-XWA2
4TNV88
4TNV88-BPTB
4TNV88-KWA2
4TNV88-QTB
4TNV88-QTBZ
4TNV88-XWA
4TNV88-XWA2
Alternate Part Numbers:
129005-22900, 12900522900
Product Specifications
| L&S Part No. | 129005 22900 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Yanmar |
| OEM No. | 129005-22900 |
| Unit of Sale | 1 |
| Applications | 3TNV88, 3TNV88-BPTB2, 3TNV88-BPTS, 3TNV88-MWA, 3TNV88-XTBZ, 3TNV88-XWA, 3TNV88-XWA2, 4TNV88, 4TNV88-BPTB, 4TNV88-KWA2, 4TNV88-QTB, 4TNV88-QTBZ, 4TNV88-XWA, 4TNV88-XWA2 |
| Machine Type | Engines |
| Fits Brands | Yanmar |
| Fits Models | 3TNV88-XTBZ | 4TNV88-QTB | 4TNV88-QTBZ | 3TNV88-BPTB2 | 4TNV88-BPTB | 3TNV88-XWA2 | 3TNV88-XWA | 4TNV88-XWA | 3TNV88-MWA | 4TNV88-XWA2 | 3TNV88-BPTS |
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