4TNV88 Rear Crankshaft OEM 129120-01780; 129795-01780 Diesel Engine Replacement Spare Parts for Yanmar
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PARTS DESCRIPTION
Product Overview
Preventing oil leakage around the rotating crankshaft depends on the correct seal dimensions, lip orientation, and installation position. For technicians sourcing a replacement for Yanmar 4TNV88 diesel engines, this Rear Crankshaft Seal can be matched by engine reference and part number before shipment.
When replacing this component, matching the application is more important than relying on appearance alone. Where a confirmed reference is available, the supplied part number can be used together with the engine information to check compatibility before shipment.
Product Information
- Product: Rear Crankshaft Seal
- Engine Model: 4TNV88
- Part Number: 129120-01780; 129795-01780
- Brand: ipartkits
- Compatible With: For Yanmar 4TNV88 Engine
Why This Part Matters
This sealing component forms a barrier between the rotating crankshaft and the surrounding engine housing. Correct inside diameter, outside diameter, width, and installation direction are important because a seal that does not match the crankshaft or housing can lead to poor seating or oil leakage.
During engine repair, the crankshaft sealing surface should also be inspected for wear or damage. Some applications use different front and rear seal designs even within the same engine family, so the part number and installation position should be confirmed before purchase.
Key Features
- Controlled fit for the corresponding crankshaft and housing interface
- Suitable for engine repair and oil-leakage service work
- Available for front or rear crankshaft positions depending on application
- Part-number matching support for similar engine variants
- Can be sourced together with related gaskets and sealing components
- Designed for crankshaft oil sealing in the specified installation position
Fitment & Ordering Note
Crankshaft seals may differ between front and rear positions and can vary by engine version, housing design, and sealing dimensions. Please compare the part number and installation position before ordering.
Related Engine Parts
Related crankshaft wear sleeves, oil pan gaskets, timing cover seals, rear housing gaskets, bearings, and engine overhaul parts may also be supplied.
Why Choose
From individual replacement components to broader engine repair sourcing, supports customers with part-number verification, technical communication, and worldwide shipping. MOQ 1 is available for many items, making it practical to source both single repair parts and mixed orders. Anti-counterfeit verification and responsive matching support are also available for products.
Need Help Confirming Fitment?
Not sure whether this part matches your application? Provide the part number, engine nameplate information, or product photos for compatibility checking.