9X3977 - SEAL-RING 5K4500 Fits Caterpillar (Fits CAT)
9X3977 - SEAL-RING 5K4500 Fits Caterpillar (Fits CAT)
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One New Aftermarket Replacement Backup Seal Ring Fits Caterpillar (Fits CAT) Wheel Loaders, Wheel Dozers, Underground Loaders, and Articulated Trucks
This aftermarket replacement backup seal ring (9X3977) is used in hydraulic systems across a wide range of Fits Caterpillar (Fits CAT) construction equipment. Backup seal rings prevent O-ring extrusion under high-pressure hydraulic conditions, protecting the primary seal and extending the service life of cylinders and hydraulic assemblies. Replaces OEM Fits Caterpillar part numbers 9X3977 and 5K4500.
Compatible Models
Fits Caterpillar Wheel Dozer: 824C, 824G, 824G II, 824H, 824K
Fits Caterpillar Wheel Loader: 980C, 980F, 980F II, 980G, 980G II, 980H, 980K, 980K HLG, 980M
Fits Caterpillar Underground Load Haul Dump: R1700 II, R1700G
Fits Caterpillar Underground Articulated Truck: AD30, AD40, AD45, AE40
Fits Caterpillar Articulated Truck: D35C, D40D
Replaces Part Number(s):
9X3977, 5K4500
New aftermarket replacement part - not remanufactured, not used.
