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Compatibility tractor radiator cap: compatible with Case IHC 323 353 533 743 744. 7 psi rating suits older tractor cooling systems. Verify neck type and seat depth before ordering. OEM number radiator cap: replaces OEM 3134146R1 and 787151R1 for listed tractors. Match part codes on the old cap or service manual to ensure interchange and correct pressure specification. 7 psi radiator cap performance: spring valve holds set pressure to raise boiling point and manage expansion, metal body with rubber seal helps maintain system pressure and coolant recovery. Tractor cooling system maintenance: use after coolant service, cap wear, or overheating. Helps limit boil over, fluid loss, and supports steady engine temperature during field work and transport. Agriculture equipment application: suitable for farm, workshop, and garage repair of tractors used for plowing, mowing, and hauling. Hand installation takes minutes with standard safety practices.