2J3961 Ring Backup Fits Caterpillar Models

One New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Construction Equipment

This backup ring (back-up ring) is a hydraulic sealing component used in Caterpillar construction and heavy equipment applications. Backup rings prevent seal extrusion under high-pressure conditions, protecting the integrity of the sealing system from pressure surges in hydraulic cylinders and related assemblies.

Specifications

• Dimensions: 4.92 x 4.92 x 0.04 in.
• Weight: 0.01 lbs.
• Quantity: 1 ring
• Serial number restriction: From serial number 1MD202 and up

Compatible Models

Caterpillar Motor Graders: 14E, 16, 24H, 24M

Caterpillar Hydraulic Excavators: 215C, 215D, 345B II, 345B L, 345C, 345C L, 345D, 345D L, 349D, 349D L, 349E L, 349E L VG, 349F L

Caterpillar Backhoe Loaders: 416B, 416C, 416D, 420D, 420E, 420F, 428B, 428C, 428D, 430D, 432D, 432E, 434E, 436

Caterpillar Track-Type Tractors (Dozers): D4E, D5H, D5H XL, D5M, D5N, D5R LGP, D6K, D6K LGP, D6K XL, D6N, D6N LGP, D7E, D7E LGP, D7F, D7G, D7G2, D8L, D8N, D9N, D9R, D9T

Caterpillar Wheel Dozers: 814B, 814F, 814F II, 824G, 824G II, 824H, 824K, 834B, 844

Caterpillar Wheel Loaders: 916, 924G, 924GZ, 924H, 924HZ, 926, 926A, 928F, 928G, 928HZ, 938F, 988F, 988F II, 990, 990 II, 992G, G926

Caterpillar Wheel Tractors / Scrapers: 611, 615, 621E, 621F, 621G, 623G, 627F, 627G, 631E, 631G, 633E II, 637E, 637G, 651E, 657E

Replaces Part Number(s):

2J3961, 2J-3961

New aftermarket replacement part - not remanufactured, not used.