further in a clockwise direction urging piston 16 against the wall of body 12 when in its extended position pivoting of piston 16 in a counter clockwise direction will move ram 18 to its retracted position shown in fig2 once piston 16 ram 18 and link 20 are attached to each other and positioned within chamber 22 cover 14 is sealingly attached to body 12 by a plurality of bolts 62 and a plurality of nuts 64 preferably a non silicone adhesive sealant is used between body 12 and cover 14 during assembly of ram 18 it is necessary for ram 18 to fit precisely within rectangular section 24 of chamber 22 body 12 which forms chamber 22 is preferably made from aluminum and it is hard coated for wear purposes a coating of teflon u00ae fluorocarbon on body 12 makes up any tolerances and it produces an excellent ram 18 to body 12 fit with little tolerance and high lubricity cover 14 engages seals 36 and 40 to provide a sealed space 66 on one side of piston 16 and a sealed space 68 on the opposite side of piston 16 body 12 defines a fluid port 70 which is in communication with sealed space 66 and a fluid port 72 which is in communication with sealed space 68 when pressurized fluid is provided to sealed space 66 through fluid port.