TM 9-2910-226-34 remove and discard remove and discard washer (E). Remove pin (G), packing (F). Figure 3-20. Removing oil filter or oil duct sealing screw assembly (code F and G pumps). b. Refer to figure 3-21. Install pump holding fixture on pump body and position fixture in a vise. Remove four hydraulic head plain nuts (A), four stud sleeves (B) and hydraulic head assembly (C) from housing. Figure 3-21. Removing hydraulic head assembly using pump holding fixture–4910-870-2128. 3-8