2378378 Ring Backup Fits Caterpillar Models
2378378 Ring Backup Fits Caterpillar Models
Regular price
$25.74 USD
Regular price
Sale price
$25.74 USD
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per
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One New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Mini Hydraulic Excavators
This aftermarket replacement backup ring replaces Caterpillar (Cat) OEM part number 2378378. Backup rings are used in hydraulic cylinder assemblies to support and protect primary O-ring seals against extrusion under pressure, helping maintain seal integrity and extend the service life of hydraulic components on Caterpillar mini excavators.
Compatible Models
Caterpillar Mini Hydraulic Excavators: 303C CR, 303.5C, 303.5D, 303.5E, 304D CR, 304E
Replaces Part Number(s):
2378378
Aftermarket Interchange Numbers
CA2378378, 237-8378
New aftermarket replacement part - not remanufactured, not used.
