TM 9-2320-209-34-2-1 h. Slave Cylinder Compensator Piston Assembly Repair. FRAME 1 1. 2. 3. 4. Take out and throw away felt ring (1) and cup ( 2). WARNING 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 compensator piston (3) with dry cleaning solvent. Be sure that center hole and cross holes of compensator piston (3) are clean and open. If grooves of piston (3) are chipped or broken, throw out air hydraulic cylinder and get a new one. GO TO FRAME 2 12-33