XT855 Operator’s Manual Transport - 59 Tow p Prepare Unit for Normal Operation 1. Close 4 tow valves on pumps. IMPORTANT: Use 4-mm Allen wrench and 13-mm box wrench to adjust tow valves. Loosen jam nut. Turn set screw out 6 turns. Tighten jam nut. 2. Close hood. 3. Disconnect tow line. CMW