All bubble nose cabovers, needle nose KWs & Petes, bull nose KWs, crackerbox GMC, Dodge Bighorn, B Macks, IH Emeryvilles, Ford H coes, Brockway coe & conventionals. Not in any order.
It`s the blue pump in front of the compressor in the second picture. I don`t know why there are three lines on the pump but when it went out on my truck we replace it and had to add the third line besause the main line got hot and blistered the line. The old pump only had two lines.