The internal parts of the slave cylinder cannot be obtained separately, and repair and overhaul are not possible, and in case of hydraulic system fault or any indication of fluid leakage, the unit is better replaced. Begin by unscrewing the hydraulic pipe union on the slave cylinder and carefully remove the pipe making sure to have a container and rags to catch any spilled fluid and cover the open pipe union to keep dirt out. Next, remove the retaining circlip and remove the unit from the transmission. For later models, you first need to remove the transmission, since you can't get at the internal slave cylinder any other way. Remove the rubber seal from the transmission and move it inward down the pipe. At the face of the transmission, remove the locking clip which holds the slave cylinder outer assembly and pull it away from the inner pipe. Remove the two mounting bolts holding the cylinder and release bearing assembly to the transmission, and remove the assembly while passing the fluid pipe through the aperture in the transmission. To refit, reverse the removal operations, making sure to tighten the release bearing assembly mounting bolts to the specified torque, use new seals for quick-release pipe fittings, reattach the transmission, if removed, and bleed the clutch hydraulic system on completion.