1583026 Ring-Backup Fits Caterpillar Models
1583026 Ring-Backup Fits Caterpillar Models
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One New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Construction Equipment
This backup ring (also called a back-up ring or anti-extrusion ring) is used in high-pressure static and dynamic sealing applications within Caterpillar hydraulic systems, including hydraulic pumps, cylinders, and valves. It is designed to sit alongside an O-ring and prevent seal extrusion under pressure, protecting the integrity of the sealing system and extending the service life of the primary seal. Replaces Caterpillar (Cat) OEM part number 1583026 (also formatted as 158-3026).
Specifications
- Bore Diameter: 165.1 mm
- Application: High-pressure hydraulic sealing systems
- Part Type: Backup Ring (Back-Up Ring / Anti-Extrusion Ring)
Compatible Models
This is a Caterpillar sealing component used across multiple Cat construction equipment platforms. Confirm fitment using your machine model and serial number before ordering, as this ring is used in various hydraulic assemblies across the Cat equipment lineup.
Replaces Part Number(s):
1583026, 158-3026
New aftermarket replacement part - not remanufactured, not used.
