931515 Ring,Back-Up Fits Caterpillar Models
931515 Ring,Back-Up Fits Caterpillar Models
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One New Aftermarket Replacement Back-Up Ring for Caterpillar (Cat) Equipment
This aftermarket replacement back-up ring (Caterpillar part number 931515) is a hydraulic sealing component used in Caterpillar construction and diesel engine equipment. Back-up rings work in conjunction with primary seals in hydraulic cylinders, preventing seal extrusion under high pressure and extending the service life of the sealing assembly. This part is commonly found in hydraulic cylinder repair and reseal applications across a wide range of Cat machinery.
Specifications
- Part Type: Back-Up Ring (Hydraulic Seal)
- OEM Part Number: 931515
- Dimensions: 172.06 mm OD x 15.24 mm cross-section x 1.27 mm width
Compatible Models
Caterpillar (Cat): Fits a wide range of Caterpillar construction and diesel engine equipment. Use your machine model and serial number to confirm fitment before ordering. Refer to your Cat parts diagram or consult your dealer to verify this part number applies to your specific cylinder group.
Replaces Part Number(s):
931515, 0931515
New aftermarket replacement part - not remanufactured, not used.



