A two-component adhesive system pumps a first adhesive component and a second adhesive component into a replaceable mixing unit that can be periodically replaced when the adhesive has cured in the mixing unit. The adhesive system may have a robotic arm coupled to a gripper unit which has an open configuration and a closed configuration. In the open configuration, the gripper unit releases the mixing unit allowing the mixing unit to be replaced. The robotic arm may moves the gripper unit to install a replacement mixing unit. The gripper unit can be moved to the closed configuration and the adhesive can be pumped through the mixing unit.