It is a part of the hydraulic cylinder that acts as a cover in the section where the back part of the bucket is closed and the materials to be connected to the bucket are located. They are produced from non-alloy steel, a material suitable for the sleeve. Generally, the rear cover is attached to the cylinder by welding method. This weld must be very smooth. Otherwise, it may damage the inside of the cylinder and cause problems in the cylinder. Connecting the back cover to the hive with the yielding method may be more secure, and it also offers the possibility of maintenance and repair.