Order the seal kit, based on each bore size. 178 Pin Clamp Cylinder DSeries Series CKQGD/CKQPD Replacement Procedure is P.374 Construction CKQGDA50 The below figures indicate the CKQGDA50-RAL. CKQPDA50 The below figures indicate the CKQPDA50-RAL. Actuators Modular F.R.L.