Description
Overview:
This Genuine Yanmar gasket (MPN 129486-42021) is a precision-cut sealing component for Yanmar industrial diesel engines. Made from durable, high-quality gasket material, it sits between mating faces to create a tight, reliable seal that helps prevent oil, coolant, fuel, air or exhaust leaks, depending on where it is installed. It supports consistent performance and protects engine internals by maintaining correct sealing pressure under heat and vibration. Designed for a precise fit on engines such as the 4TNE88 and 3TNV88-MWA, it is suitable for plant, agricultural and generator applications where Yanmar TN-series engines are commonly used. As a genuine OEM part, it matches Yanmar specifications for thickness, profile and bolt-hole alignment to simplify fitting and to maintain long-term reliability.
Key Features:
- Genuine Yanmar part for assured compatibility and performance (MPN 129486-42021)
- Made from robust gasket material for resistance to heat, oils and coolants
- Precision profile and hole pattern for accurate alignment and sealing
- Helps prevent fluid and gas leaks to protect engine efficiency and longevity
- Stable under thermal cycling and vibration to maintain clamp load and seal integrity
- Supports correct torque retention when reassembling components
- Suitable for routine servicing or remedial repairs to leaking joints
- Clean, flat sealing faces make installation straightforward with standard tools
- Matches OEM specification to reduce downtime and rework
- Compatible with a wide range of Yanmar TN-series engines used in plant, turf and power equipment
Typical Applications:
Used during engine maintenance and overhauls on Yanmar-powered machinery, including compact excavators, loaders, site dumpers, compressors, generators and agricultural equipment. Ideal for resealing covers, housings and manifolds where a crisp, leak-free joint is required after component removal or replacement.
Also known as:
Engine sealing gasket, replacement gasket, joint gasket, cover gasket, OEM gasket, engine seal, mating-surface gasket, service gasket for Yanmar TN-series engines.
Fits Models:
3TNV88-BPTB2, 3TNV88-MWA, 3TNV88-XTBZ, 3TNV88-XWA, 3TNV88-XWA2, 4TNE84, 4TNE84T, 4TNE88, 4TNV84-KWA, 4TNV84T-KWA, 4TNV84T-MWA, 4TNV84T-XWA, 4TNV88-BPTB, 4TNV88-KWA, 4TNV88-QTB, 4TNV88-QTBZ, 4TNV88-XWA, 4TNV88-XWA2
Alternate Part Numbers:
129486-42021, 12948642021
Product Specifications
| L&S Part No. | 129486 42021 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Yanmar |
| OEM No. | 129486-42021 |
| Unit of Sale | 1 |
| Applications | 3TNV88-BPTB2, 3TNV88-MWA, 3TNV88-XTBZ, 3TNV88-XWA, 3TNV88-XWA2, 4TNE84, 4TNE84T, 4TNE88, 4TNV84-KWA, 4TNV84T-KWA, 4TNV84T-MWA, 4TNV84T-XWA, 4TNV88-BPTB, 4TNV88-KWA, 4TNV88-QTB, 4TNV88-QTBZ, 4TNV88-XWA, 4TNV88-XWA2 |
| Machine Type | Excavators, Loaders, Tractors |
| Fits Brands | Yanmar |
| Fits Models | 4TNE88 | 4TNE84T | 4TNE84 | 3TNV88-XTBZ | 4TNV88-QTB | 4TNV88-QTBZ | 3TNV88-BPTB2 | 4TNV88-BPTB | 3TNV88-XWA2 | 3TNV88-XWA | 4TNV84T-XWA | 4TNV88-XWA | 4TNV84T-KWA | 4TNV84T-MWA | 3TNV88-MWA | 4TNV88-XWA2 | 4TNV84-KWA |
