sprocket are located outside the loop of endless chain a conventional hydraulic tensioner of the prior art which can be utilized with the system of the present invention is shown in hunter u s pat no 5 346 436 which is incorporated herein by reference the hydraulic tensioner includes a piston that extends upward to apply pressure on the free end of the tensioner arm the tensioner typically includes a housing having a central bore that forms a fluid chamber with the interior of the piston the fluid chamber is supplied with fluid through a passageway from a pressurized fluid source the fluid source may be an oil pump or a reservoir fluid travels into the fluid chamber through a one way check valve check valves are well known in the tensioner art a spring typically contacts the inside of the piston causing the piston to be biased or move axially in a protruding or outward direction from the housing bore the upper end of the piston contacts the arm to provide tension on the arm which in turn applies tension along the chain strand in operation upon start up the piston of the hydraulic tensioner is biased outward by the spring which causes the check.