Cat® Track Idler Recoil Spring works with the grease filled adjustment cylinder, to move the idler forward and back to maintain proper track tension as it absorbs undercarriage shock loads. The recoil spring allows for the tension of a track to be controlled and for impacts to the undercarriage to be absorbed, without the force of the impact affecting sensitive parts on the machine, like final drives and sprockets. As an impact absorption device the recoil spring contracts upon impact while also continually providing measured tension in the track through the control of a cylinder. Cat® Springs are manufactured to precise specifications and are built for durability, reliability, and productivity for the lifetime of your machine.Spring Wire Diameter : Ø30 mm (1.18 in)Total Coils : 7.2Active Coils : 5.2Load at Assembled Length : 75227 NApplication:Cat® Recoil Springs are used in front idlers of undercarriage system in Cat® Heavy duty equipment's. Consult your owner's manual or contact your local Cat® Dealer for more information.