TM 9-2320-209-34-2-1 j. Assembly of Air Hydraulic Cylinder Assembly. (1) Slave cylinder compensator body assembly replacement. CAUTION Use only bench vise with soft copper or lead jaws. 1. Put slave cylinder body (1) in vise. 2. Put control valve piston (2) into bore in slave body (1). Small end of control valve piston should point down. Be sure that lip of cup (3) does not fold back. GO TO FRAME 2 12-37