2005-2007 Polaris Ranger 500 service manual, Page 77Get this manual
ENGINE 3Tensioner Spring Free Length: 2.02" (5.13 cm) 4Measure free length of tensioner springReplace spring if excessively wornCompare to specificationsMeasure O.Dof rocker shaftInspect it for wear or damageCompare to specificationsRocker Shaft O.D .8656-.8661" (21.987-22.0 mm) 5Replace entire tensioner assembly if any part is worn or damaged4Measure I.Dof each rocker arm and compare to specifications
Rocker ArmShaft Inspection