Australian Mud Nest Wasps Ausemade Potter Wasp mud nest Ausemade Mud Nests and Potter Wasps Ausemade Potter Wasp mud nest Ausemade. One New Aftermarket Replacement Oscillating Seal Assembly for Caterpillar (Cat) Construction Equipment This aftermarket replacement oscillating seal assembly replaces Caterpillar (Cat) OEM part number 7P 3652. Oscillating seals are used in hydraulic cylinder and steering system applications where a shaft or pin moves in an arc, maintaining a fluid tight barrier to prevent leaks and protect internal components. This seal assembly is suited for front axle and steering system service on Caterpillar construction equipment. Compatible Models Caterpillar (Cat): Verify fitment using your machine model and serial number. This seal assembly is cataloged for Caterpillar construction equipment in the front axle and steering components group. Consult your Cat parts manual or dealer to confirm compatibility before ordering. Replaces Part Number(s): 7P3652, 7P 3652 New aftermarket replacement part not remanufactured, not used.