2M8663 O-Ring Seal

2M8663 is an O-ring seal for Caterpillar equipment, including engines, construction machinery, tractors, trucks, and wheel loaders or dozers. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

Fitment

The seal is listed for the following Caterpillar equipment models and machine applications:

• Gen set engine: D398B.
• Industrial engines: D342, D342C, D353C, D398, and D399.
• Marine engines: D353C, D379A, D397D, and D398A.
• Pipelayer: 594H.
• Track-type tractors: D8H, D9E, and D9G.
• Truck: 769.
• Wheel dozer: 834.
• Wheel scraper: 657.

Compatibility is specified by the Caterpillar machine type and model listed above. The applications include both complete machines and power units, so the equipment model should be checked against the machine identification and parts documentation before installation.

For engine applications, the listed models include Caterpillar D342, D342C, D353C, D398, D399, D398B, D379A, and D397D variants. For machine applications, the listed fitment includes the 594H pipelayer, D8H, D9E, and D9G track-type tractors, the 769 truck, the 834 wheel dozer, and the 657 wheel scraper.

Specifications

The stated dimensions are 3.5 cm in length, 3.5 cm in width, and 0.1 cm in depth. The listed part weight is 0.1 lb. The available product data does not specify the seal material, internal diameter, cross-section, hardness, temperature range, thread, installation position, or additional components supplied with the seal.