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Original ZF O-Ring 64×3 mm – Part No. 0634313574 Genuine ZF Transmission Seal for InputOutput Shaft & Cover Joints
- 24/7 order processing with DHL/FedEx express options.
- In-stock availability for urgent repairs.
- Free technical guidance on installation and compatibility
- P/N:0634313574
Looking for authentic ZF parts? This is the original ZF O-Ring (Part Number: 0634313574, Size: 64×3 mm) , a high-quality radial sealing ring engineered for critical joints in ZF transmissions. As a trusted ZF parts supplier, we offer genuine-spec O-rings made from oil-resistant NBR rubber to ensure leak-free performance under pressure and extreme temperatures. Whether you’re searching for a reliable ZF parts dealer or need essential ZF gearbox parts, this precision seal is vital for transmission maintenance, overhaul, and repair of trucks, buses, and commercial vehicles.


Product Overview
The ZF O-Ring 64×3 mm (Part No. 0634313574) is a precision-engineered static and dynamic sealing component used in ZF mechanical and automated manual (AMT) transmissions. It is commonly installed on input/output shafts, sensor housings, inspection covers, and breather assemblies to prevent gear oil leakage and maintain internal pressure integrity.
Manufactured to strict OEM specifications using high-grade nitrile butadiene rubber (NBR) , this O-ring delivers excellent resistance to mineral oils, fuels, and thermal degradation. Its durable design ensures long service life even in heavy-duty applications such as long-haul trucks, construction equipment, and city buses.
This O-ring is frequently replaced during transmission servicing or overhauls—especially when diagnosing oil seepage around control units or housing joints. Compatible with various ZF Ecomid, ZF S6, and other series transmissions, it fits widely used commercial vehicle platforms including MAN, Scania, DAF, Volvo, Sinotruk, Foton, and more.
As a professional ZF parts supplier, we guarantee authenticity, consistency, and reliability—making us your preferred global ZF parts dealer for workshops, fleet operators, and spare parts distributors.
Technical Specifications (Technical Data Table)
| Parameter | Specification |
|---|---|
| Part Name | O-Ring / Radial Sealing Ring |
| Part Number | 0634313574 |
| OEM Number | ZF 0634313574 |
| Inside Diameter (ID) | 64 mm |
| Cross Section (CS) | 3 mm |
| Size Notation | 64×3 mm |
| Material | Nitrile Rubber (NBR) |
| Hardness | 70±5 Shore A |
| Temperature Range | -40°C to +120°C |
| Color | Black |
| Application Type | Static & Dynamic Seals |
| Function | Prevent Oil Leakage at Joints & Shafts |
| Compatibility | ZF Ecomid, ZF S6 Series Transmissions |
| Condition | New, Original Quality |
| Packaging | Individually Packed – Anti-static & Moisture Resistant |
Installation Tip: Always clean the groove and mating surface thoroughly before installing the new O-ring. Inspect for scratches, dents, or sharp edges that could damage the seal. Lightly lubricate the O-ring with transmission oil or silicone grease to avoid twisting or cutting during assembly. Do not stretch excessively—position gently by hand. After reassembly, refill oil, run the engine briefly, and check for leaks. Replace all old O-rings during overhauls—even if they look intact. Recommended for use by trained technicians performing ZF transmission repairs.
Packaging & Shipping
By Express : Suitable for sample order or <50 KG Fast:3-10 days High shipping cost Door to door service
By Air : Suitable for >50 KG Fast: 3-7 days Lower than express cost Airport to airport service
By Sea: Suitable for >300 KG Lower cost port to port service


As a leading supplier and dealer of ZF parts, we provide genuine components to maintain the integrity and efficiency of your gearbox system. Trust in our expertise and quality assurance to keep your ZF gearbox running smoothly.
| Installation Tips | Surface prep: Degrease with ZF Cliclean 3 solvent; Gasket application: Use Loctite 518 in continuous 1.5mm bead;; Alignment: Install using factory alignment pins (ZF tool B40 5003 recommended);; Torque sequence:Initial: 12Nm star pattern—–Final: 28Nm + 90° angle torque;;;; Post-install: Pressure test at 2.5 bar before fluid fill |
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