8S0557 Ring fit Caterpillar

The 8S0557 is a standard transmission seal ring for Caterpillar equipment, including tracked bulldozers and pipelayers. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by the Caterpillar equipment application data for the listed machine models and series below. The product designation also includes the hyphenated number 8S-0557.

Fitment

The ring is used on the following Caterpillar equipment models and machine series:

• 183B tracked bulldozer
• 8D tracked bulldozer
• 8S tracked bulldozer
• D8K tracked bulldozer
• D9G tracked bulldozer
• D9H tracked bulldozer
• 583K pipelayer
• 594 pipelayer
• 594H pipelayer

Fitment is stated for the models listed above. The available product information does not specify a particular transmission position, installation location, or the number of rings required for each machine.

Cross-reference numbers

The following numbers are associated with this transmission seal ring:

• 8S0557
• 8S-0557
• 7M8394

8S0557 and 8S-0557 designate the same part number in different formatting. 7M8394 is listed as a cross-reference number for the part.

Specifications