Fenner Stone Waltco Hydraulic Power Unit Pump. The item "Fenner Stone Waltco Hydraulic Power Unit Pump" is in sale since Wednesday, March 11, 2015. This item is in the category "Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Tractor Parts". The seller is "ih_eagle" and is located in Heron Lake, Minnesota. This item can be shipped worldwide.