Caterpillar 2M-0340 O-Ring

Cat 2M-0340 is a genuine Caterpillar seal O-ring with an inside diameter of 214.3 mm, engineered as a replacement seal for hydraulic and fluid-handling interfaces on compatible CAT equipment. Cataloged in Caterpillar’s official parts system as 2M-0340, this O-ring is specified to Cat’s OEM tolerances for reliable compression and fluid containment under typical service pressures, avoiding deformation and leaks that can arise from ill-fitting seals. It is listed for use on several Caterpillar models, including R1700 II, R1700G, R1700K, R2900, and R2900G, making it a targeted choice for maintenance or repair work on those machines. Selecting this Cat O-ring ensures alignment with the original seal geometry and material performance expectations, supporting long-term system integrity in hydraulic circuits and lubrication ports where a precise, CAT-brand seal is required.