Craftsman Part #923-3018, Troybilt Lawn Tractor Idler Adjuster Rod Ball Joint. This idler adjuster rod ball joint (part number 923-3018) is for lawn tractors. Idler adjuster rod ball joint 923-3018 connects the idler adjuster rod to the idler bracket. Wear work gloves to protect your hands. Also fits these brands: Craftsman, MT... - Craftsman Part #923-3018, Troybilt Lawn Tractor Idler Adjuster Rod Ball Joint.