The 9926/9928 Drum Pump Series is designed for fast and efficient topping up of automatic transmissions, engines, gearboxes, and differentials. The 9926 is specifically designed for automatic transmission fluid (ATF), while the 9928 is intended for engine oil, gear oil, differential oil, and other compatible lubricants. Featuring a heavy-duty spring-loaded piston design, simply prime the pump by pushing down on the piston and spring assembly, then open the hand piece to dispense up to 330 mL of fluid per stroke. The integrated drain-back nozzle holster helps return excess fluid to the drum, reducing spills, while the swiveling pump head follows the operator for improved handling and reduced hose twisting. Ideal for quick, clean, and efficient fluid transfer in professional workshop applications.