YNF17001 rear oil seal (129795-01780) ensures reliable crankshaft sealing for ZX30U-2 and 3D88 engines.
OEM replacement for 129795-01780 rear crankshaft oil seal
Compatible with Hitachi ZX30U-2 and Yanmar 3D88 engines
Heat-resistant rubber and metal-rim construction for long life
Prevents engine oil leakage and maintains crankcase pressure
Precision-designed sealing lip for stable performance
The YNF17001 crankshaft rear oil seal, replacing OEM part 129795-01780, is engineered to provide a secure and leak-free seal for Hitachi ZX30U-2 and Yanmar 3D88 engines. Positioned at the rear of the crankshaft, this seal prevents engine oil leakage while maintaining proper lubrication and internal pressure, which is essential for engine reliability.
Constructed with a combination of high-temperature-resistant rubber and a reinforced metal outer ring, the seal offers excellent durability in high-rpm, high-heat operating environments. Its precision manufacturing ensures an accurate fit and stable sealing performance, reducing premature wear and minimizing the risk of engine oil contamination.
The YNF17001 rear oil seal is trusted by repair shops, distributors, and machinery owners due to its OEM-level compatibility, long service life, and cost-effective value. Replacing a worn seal restores engine cleanliness, prevents oil loss, and protects major engine components from damage.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17001 |
| OEM Number | 129795-01780 |
| Applicable Machines | Hitachi ZX30U-2 |
| Applicable Engines | Yanmar 3D88 |
| Product Type | Crankshaft Rear Oil Seal |
| Function | Prevents oil leakage at crankshaft rear end |
| Material | High-temp rubber + metal casing |
| Resistance | Oil, heat, friction, vibration |
| Installation | Direct OEM replacement |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Engine Oil Sealing | Prevents leakage from crankshaft rear section |
| ZX30U-2 Engine Overhaul | Used during major engine repairs |
| 3D88 Engine Maintenance | Ensures clean and stable lubrication system |
| Aftermarket Engine Parts | Suitable for distributors and engine rebuilders |
Related Products:
3D88 Engine Gasket Kit
Crankshaft Front Oil Seal
ZX30U-2 Engine Overhaul Parts
Diesel Engine Sealing Components
FAQs：
Q: Which engines does this oil seal fit?
A: Yanmar 3D88 engine.
Q: What machine model uses this seal?
A: Hitachi ZX30U-2 mini excavator.
Q: What problems occur when the rear seal fails?
A: Oil leakage, contamination, increased wear, and unstable lubrication.
The YNF17001 129795-01780 rear crankshaft oil seal delivers reliable sealing performance for ZX30U-2 and 3D88 engines. Engineered with premium materials and OEM-matching dimensions, it helps reduce oil leakage, extend engine life, and minimize downtime. YNF Machinery offers stable inventory, fast shipping, and competitive pricing—ideal for wholesalers, repair centers, and fleet operators. Contact us today for your quotation.
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