Seal 9X7720 for Caterpillar Equipment

Seal 9X7720 is a replacement seal used in Caterpillar equipment. It is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is listed for Caterpillar tracked bulldozers, wheeled tractor-scrapers, and pipe-layers. The available application data identifies the equipment models and series below.

Fitment

• Tracked bulldozers:
  • 57H
  • 7
  • 7A
  • 7S
  • 7SU
  • 7U
  • 8
  • 8A
  • 8SU
  • 8U
  • D7H
  • D8 GC
  • D8GC
  • D8N
  • D8R
• Wheeled tractor-scrapers:
  • 613C
  • 613C II
  • 613G
  • 615
  • 615C
• Pipe-layers:
  • 583R
  • 578
  • 587R

Cross-reference numbers

Part number 9X7720 is also identified as 9X-7720 in Caterpillar equipment parts references. The two number formats refer to the same seal identification shown for this product.

Specifications

The dimensional values supplied for this part are a shaft diameter of 3.000 inches, an outside diameter of 4.0078 inches, and a width of 0.453 inches. These dimensions can be used when checking the seal against the installation location and the removed part before assembly.

For equipment identification, verify the machine model and the part number 9X7720 or 9X-7720 against the service parts documentation for the specific Caterpillar machine. The listed fitment includes multiple model series, and the same seal number may be used across different equipment types.