frame 1 TM 9-2320-209-34-2-1 2-20. OIL COOLER BYPASS VALVE REMOVAL, REPAIR AND REPLACEMENT. TOOLS: No special tools required SUPPLIES: Gasket Oil cooler bypass PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. Preliminary Procedure. Open hood and left side panel. Refer to TM 9-2320-209-10. b. Removal. 1. Take out plug (1), gasket (2), spring (3), and plunger (4). Throw away gasket. END OF TASK 2-203