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National 100557 Multi-Purpose Premium Oil Bath Seal – Part Number 100557 – Fluoro-Elastomer Pinion & Drive Axle Containment


Sale price $18.99 Regular price $27.99
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Description

The National Oil Seal 100557 (engineered by Timken) is a premium, industrial-grade heavy-duty dynamic shaft seal designed to provide absolute fluid containment in demanding commercial vehicle and heavy machinery systems. This solid-design seal features an advanced spring-loaded, multi-lip configuration equipped with a clockwise (CW) hydrodynamic lip to optimize fluid deflection and maintain constant sealing pressure. Forged from premium Fluoro-Elastomer (FKM/Viton) material, it delivers a broad temperature service spectrum ranging from -40°F to 400°F alongside exceptional chemical resistance to petroleum-based oils, industrial lubricants, and synthetic fuels. Built with National's proprietary Sure-Lock internal diameter rib layout and Redicoat outer shell coating, this Type 8 cross-section flanged seal anchors tightly into housing bores to completely eliminate outer bypass leaks under intense continuous operation. [1, 2, 3, 4]
⭐ Key Features & Benefits
  • Premium Fluoro-Elastomer (FKM) Lip: Engineered with genuine Viton compound to offer superior resistance against high heat, abrasion, and aggressive EP additives. [1, 2]
  • CW Hydrodynamic Multi-Lip Geometry: Features a specialized clockwise helix design that pumps migrating oil smoothly back into the bearing reservoir. [1, 2]
  • Spring-Loaded Tension Design: Internal garter spring applies uniform concentric radial pressure to compensate for shaft runout and micro-vibrations. [1, 2]
  • Sure-Lock I.D. Rib Base: Raised structural indexing ribs ensure a secure, unyielding mechanical press fit into heavy drive hub casings. [1, 2]
  • Wide Thermal Tolerance: Maintains structural sealing elasticity in extreme environments fluctuating anywhere from -40°F up to a scorching 400°F. [1, 2]
🔧 Uses / Applications
  • Heavy-Duty Commercial Axles: Extensively utilized as a heavy-duty drive axle or differential pinion seal on semi-trucks, buses, and vocational vehicles.
  • Industrial Gearboxes & Refineries: Deployed inside heavy power transmission systems, high-speed automated machinery, and oil fluid processing lines.
  • Off-Highway Construction Machinery: Provides exceptional mud and fluid exclusion on major agricultural tractors, earthmovers, and mining haulers.
  • Fleet Preventive Maintenance: Serves as the ultimate long-life drop-in replacement part to eliminate wet-hub leaks during scheduled fleet operations. [1, 2, 3]
📊 Technical Specifications
Specification Detail
Part Type Heavy-Duty Multi-Purpose Oil / Pinion Seal
Position / Location Differential Pinion Shaft / Drive Axle Hub Assembly
Part Number / MPN 100557 (also cataloged as Timken 100557)
Material Premium Fluoro-Elastomer (FKM) / Steel Outer Shell
Fitment Type Shaft Dia: 3.253" | Housing Bore: 5.500" | Outside Dia: 5.511" | Width: 0.635"
Condition Brand New
Installation Direct-Fit Press / Recommended Installation Tool: RD2337
🔄 Cross‑Reference / Interchange Table
Manufacturer Equivalent Part Number
OEM / Factory National Seals / Timken 100557
International Harvester 2590713C1
Ford Motor Co. YC3Z-4676-BA / YC3Z4676BA
Volvo Truck 3915214
Meritor / Rockwell A1205-Q-2591 / 32870
Stemco 429-0011 / 4290011
Additional Notes Design Configuration: Cross Section Type 8 flanged layout featuring an exterior pre-painted/treated shell casing.

Disclosure Policy

This product was acquired by Freeman Liquidators from a sale of merchandise subject to a commercial insurance loss. Freeman Liquidators is a secondary seller of products, is not affiliated with or sponsored by the manufacturer of the products and is not a manufacturer authorized seller of the products. Sale of this product by Freeman Liquidators is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser.

All products are NEVER USED but external packaging will have damage. Some items may be placed into other packaging to ensure safe shipping. All items are opened for inspection prior to shipment to ensure the best quality of products. Freeman Liquidators guarantees your satisfaction. If you are not completely satisfied with a purchased product, within 30 days from the date of purchase, return the product in its packaging and Freeman Liquidators will fully refund your money.

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National 100557 Multi-Purpose Premium Oil Bath Seal – Part Number 100557 – Fluoro-Elastomer Pinion & Drive Axle Containment

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