Bobcat 3974988 Cooling System Return Hose

Technical specification for Bobcat OEM pipe 3974988, designated as a cooling system return hose connecting the thermostat flange to the water pump or radiator circuit. Constructed from high-temperature EPDM rubber compound with synthetic fabric reinforcement to withstand engine coolant temperatures and system pressure cycles. The hose features a pre-formed 90-degree bend geometry for direct installation on Kubota V2003T and V2203 diesel engines integrated into Bobcat compact equipment. This component replaces Bobcat OEM part numbers 6578280, 6576028, 6578279, and 7433225. Validated for fitment across Bobcat compact excavator series (225, 325, 331, 334, 341) and skid steer loader series (643, 743, 753, 763, 773, S150, S175, S185, T190).