1220440 Ring-Backup Fits Caterpillar Models
1220440 Ring-Backup Fits Caterpillar Models
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One New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Equipment
This aftermarket replacement backup ring (OEM part number 1220440) is a hydraulic sealing component used in Caterpillar construction equipment. Backup rings work in conjunction with O-rings in hydraulic cylinder and sealing applications, preventing the O-ring from extruding into the clearance gap under high-pressure conditions. Replacing a worn or damaged backup ring helps restore hydraulic system integrity and prevents premature seal failure.
Compatible Models
Caterpillar (Cat): Please verify compatibility using your machine model and serial number before ordering. This part fits Caterpillar equipment - consult your parts manual or dealer to confirm fitment for your specific machine.
Replaces Part Number(s):
1220440
New aftermarket replacement part - not remanufactured, not used.
