2K3258 - RING-BACKUP (RUBBER) 306144 Fits Caterpillar (Fits CAT) !!!0!

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

This rubber backup ring (part number 2K3258 / 2K-3258) is used in high-pressure static and dynamic sealing applications including hydraulic pumps, valves, and engine systems. With an internal diameter of 145.35mm, it is manufactured from urethane rubber offering excellent abrasion and cut resistance, compatible with petroleum-based lubricants and hydraulic fluids. Not intended for use with water-soluble fluids.

Specifications

• Part Type: Rubber Backup Ring
• Internal Diameter: 145.35mm
• Material: Urethane Rubber
• Application: High-pressure hydraulic and engine sealing systems

Compatible Models

Caterpillar Underground Articulated Truck: AD22, AD30

Caterpillar Wheel Tractor / Scraper: 621, 621B, 621E, 621G, 627G, 631C, 633C, 637, 650B, 651E, 657E, 660B, 666, 666B

Caterpillar Hydraulic Control: 153, 163

Caterpillar Track Loader: 977K, 977L, 983

Caterpillar Load Haul Dump: R1300, R1300G, R1300G II

Caterpillar Wheel Dozer: 824C, 824G II, 824H, 834B, 834G, 834H

Caterpillar Off Highway Truck: 789D

Caterpillar Winch: 55, 56, 56H, 57H, 58L, 59, 59L, 59N

Caterpillar Wheel Loader: 950, 950B, 950B/950E, 950E, 950F, 950F II, 960F, 966C, 966R

Caterpillar Telehandler: TH560B

Caterpillar Track-Type Tractor: D6D, D6E, D6E SR, D6F SR, D6G SR, D6G2 XL, D6H, D6H II, D6H XL, D6H XR, D6R, D6R II, D6R III, D6R STD, D6R XL, D6T, D6T LGP, D6T XL, D6T XW, D7F, D7G, D7G2, D7H, D7R, D9L, D10N

Caterpillar Ripper: 4, 5, 6, 7, 9, 10, 951, 955, 977

Caterpillar Hammer: H110E, H110E S, H115E, H115E S, H120E, H120E S, H130E, H130E S, H140E, H140E S, H160E, H160E S, H180E, H180E S

Replaces Part Number(s):

2K3258, 2K3258-A, 2K-3258

New aftermarket replacement part - not remanufactured, not used.