Caterpillar
O-ring for Caterpillar 980 C
This O-ring is a sealing component used in the hydraulic systems of Caterpillar 980 C wheel loaders and D5C bulldozers. It provides a fluid-tight seal between mating surfaces to maintain system pressure and prevent leaks.
Specifications
- Part number
- 4J5268
- Brand
- Caterpillar
The 4J5268 O-ring serves as a sealing element within the hydraulic and pneumatic circuits of Caterpillar heavy machinery. By sitting within a machined groove and undergoing compression between two components, it creates a barrier that prevents the escape of hydraulic oil or air and blocks the entry of external contaminants. This seal is used across various hydraulic assemblies, including cylinders, valves, pumps, and hose connections, where maintaining circuit integrity is necessary for proper system function.
This component is compatible with the Caterpillar 980 C wheel loader and the D5C bulldozer. It is designed to fit specific connection points within these machines to ensure a precise seal. Proper installation of this O-ring is required to maintain the operational pressure of the hydraulic system and prevent fluid loss during equipment operation.
O-rings function by deforming under pressure to fill the gaps between mechanical parts, effectively sealing against both static and dynamic conditions. They are standard components used throughout heavy equipment to isolate hydraulic fluid from the environment and separate different pressure zones within a valve or pump assembly.

