TM 9-2320-209-34-2-1 i. Slave Cylinder Control Valve Piston Assembly Repair. FRAME 1 1. 2. 3. 4. Take off and throw away outer cup (1). Take off and throw away inner cup (2). Dry cleaning solvent is flammable. Do not use near an open flame. Keep a fire extinguisher nearby when sol- vent is used. Use only in well-ventilated places. Failure to do this may result in injury to personnel and damage to equipment. Clean control valve piston (3) with dry cleaning solvent. Check that control valve piston (3) is not scratched, scored or damaged in any other way. If it is damaged, throw away air hydraulic cylinder and get a new one. GO TO FRAME 2 12-35