Caterpillar 9W-5976 Ring is a CAT seal O-ring (part 9W5976) designed to form a tight, fluid‑tight interface at mating joints in Cat equipment. It is listed as compatible with multiple Cat dozer models, including 772B, 773B, 775B, 776B, 777B, 784B, 785, 785B, and 789. This replacement ring helps restore original sealing performance in CAT assemblies, ensuring reliable operation by preventing leaks at the seal interfaces.
