3S6538 O-Ring for Caterpillar Equipment

The 3S6538 is an O-ring seal for equipment manufactured by Caterpillar. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The seal is identified by the part number formats 3S6538 and 3S-6538. The available application information covers Caterpillar wheeled tractor-scrapers, truck engines, ship equipment, and wheel loaders. The model references are listed below by equipment type.

Fitment

• Wheeled tractor-scraper: Caterpillar 621
• Wheeled tractor-scraper: Caterpillar 623
• Truck engine: Caterpillar 1674
• Truck engine: Caterpillar 1676
• Ship equipment: Caterpillar D334
• Ship equipment: Caterpillar D336
• Wheel loader: Caterpillar 972G
• Wheel loader: Caterpillar 980

The fitment references above include the equipment type and model designation provided for part number 3S-6538. The O-ring is specified for use across these Caterpillar applications; the exact installation position is not identified in the available part data.

Cross-reference numbers

Specifications

The dimensional data describes the seal as a round O-ring with a 1.48-inch internal diameter and a 0.21-inch cross-section diameter. The material specification is NBR, also known as nitrile rubber. The listed operating temperature range is from -40 to 212 °F, and no surface coating is specified.

The package or individual-part dimensions provided for identification are 4.8 cm in length, 4.8 cm in width, and 0.5 cm in depth. The stated weight is 0.1 lb. No additional components or installation hardware are specified as included with this part.