3N1372 Seal A for Caterpillar

3N1372 is a mechanical seal for water pump applications on Caterpillar engines and engine-powered equipment. It is identified as Seal A and is used with Caterpillar gas, generator-set, industrial, and marine engine models listed below. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The listed applications cover several Caterpillar engine families. The part is specified for G379, G398, and G399 gas engines; D379B, D398B, and D399 generator-set engines; D348, D379, D398, and D399 industrial engines; and D343, D349, D398A, and D399 marine engines.

Fitment

• Caterpillar gas engines: G379, G398, G399
• Caterpillar generator-set engines: D379B, D398B, D399
• Caterpillar industrial engines: D348, D379, D398, D399
• Caterpillar marine engines: D343, D349, D398A, D399

Compatibility is specified by engine model and application category. The listed fitment includes both base engine designations, such as D379, D398, and D399, and application-specific versions, such as D379B, D398B, and D398A. Verify the engine model and the existing seal identification before installation where multiple configurations are present.

For gas-engine applications, the compatible models are G379, G398, and G399. For generator-set applications, the compatible models are D379B, D398B, and D399. Industrial-engine applications include D348, D379, D398, and D399. Marine-engine applications include D343, D349, D398A, and D399.

Specifications

The stated dimensions are length 8.89 cm, width 15.24 cm, and depth 1.27 cm. The listed weight is 0.1 lb. No additional material, thread, seal-face, shaft-size, packaging, or included-component information is specified for part number 3N1372.