Pump jack centering roller system

A roller system comprising a top roller, a middle roller and a split lower roller configured for a pump jack arranged for travelling up and down a pole, wherein the pump jack comprises a frame member;

• a bracket member supported on the top of said frame member, said bracket member supporting a front rod;
• a lower shackle member supported on said frame member, having a front and rear clamping bars configured to apply a coupling force for gripping the pole, wherein the rear clamping bar is inserted into the split lower roller;
• a pump arm pivotally coupled to said frame member;
• an upper shackle member pivotally coupled to said pump arm, having a front gripping rod and a rear gripping rod configured to apply a coupling force for gripping the pole, wherein the rear gripping rod is inserted into the middle roller;
• tension springs responsive to the pumping action of the pump arm configured to alternately position one of said shackle members in gripping relationship with the pole;
• said pump arm pivotally stepping upward said frame member during a pump stroke while said upper shackle member grips the pole and pivotally stepping upward said upper shackle member during a reverse stroke while said lower shackle member grips the pole;
• a release lever configured to disengage said lower shackle member from the pole, and a handle coupled to said front gripping rod configured to roll the pump jack down the pole;
• wherein the front rod is inserted into the top roller configured to roll along a front surface of the pole;
• wherein the split lower roller comprises a pair of facing lower rollers, each of the pair of facing lower rollers having an outward tapered flange.