1178766 O-Ring Seal for Caterpillar Equipment

SKU 1178766 is a standard O-ring seal used in Caterpillar equipment sealing applications. The seal has a rubber-based construction with FCM material and is supplied without a coating. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The available product data identifies the equipment brand as Caterpillar but does not specify individual machine models or series. Fitment should therefore be confirmed by matching the equipment parts documentation and the required seal dimensions with the information below.

Cross-reference numbers

The part is identified under the following equipment manufacturer number format:

• 1178766
• 117-8766

The numbers above identify the same O-ring seal in different formatting. No additional supplier reference numbers are provided in the available product data.

Specifications

The dimensional data describes the O-ring by its cross-section, inside diameter, and outside diameter. These values are 0.09 inch, 0.64 inch, and 0.831 inch respectively. The product data also lists overall length, width, and depth measurements in centimetres; the source does not further define whether these measurements refer to the individual seal or its supplied presentation.

The seal is specified with a hardness of 90 Shore A and an FCM material designation. The listed temperature range is from -40 to 350 °F. The product data does not provide a separate SAE AS568 dash-size designation, and no coating is specified.