For long stroke, it is necessary to equip the cylinder with a brace ring. Its length must be added to the overall di- mension of the cylinder. SWIVELS TYPE The standard swivels are of type GE... LO from INA Elges or GEG...ES from SKF or équivalent other sup- pliers. Other types available on demand. PACKING Cylinders are delivered with ail ports plugged. The threaded pieces are protected by peelable varnish. OPERATING The hydraulic circuits must be tight and bleeded. The presence of air in the circuit may cause seals destruction. A bleed device at the front and rear parts will equip each cylinder. The used fluid and the circuit must be totally clean. Before connection, ail pipings and connecting pipes must be deaned and washed or carefully cleaned.