b. Refer to figure 3-16. Rotate camshaft until slotted tooth of plunger drive gear alines with arrow on injection pump housing. Lock camshaft in this position using camshaft fixture. TM 9-2910-226-34 d. Refer to figure 3-18. Position puller (A) and loosen timing device hub (B). Figure 3-16. Locking camshaft using fixture–4910-870-2131. c. Refer to figure 3-17. Loosen camshaft nut setscrew (A) and camshaft nut (B) two or three turns. Figure 3-18. Removing timing device hub using puller – 5120-793-5048. e. Refer to figure 3-17. Remove camshaft nut setscrew (A), camshaft nut (B) and timing device hub . f. Refer to figure 3-19. Remove Woodruff key (A). Figure 3-19. Removing or installing pump Woodruff key. 3-13. Removal of Hydraulic Head Assembly. NOTE Sub-Paragraph a below applies only to code F and G injection pumps. a. Refer to figure 3-20. Remove oil filter screw (A). Remove and discard filter screw copper gasket (B) and remove oil filter (C). Or remove screw (D), Figure 3-17. Loosening camshaft nut. 3-7