TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 7-28. Correct position of camshaft lobes (cams) for fuel injection pump installation-sectional view. 1. 2. Using two 5 / 16-in. steel rods (A), hold fuel injection pump diaphragm pack stationary. Rotate flange coupling counterclockwise to remove any backlash in injection pump gear train and bring the advance unit to the full retard position. When backlash is removed and timing marks alined, install four lock washers and bolts (B) and tighten securely. Note. When installing bolts in diaphragm coupling, be sure the proper length bolts - FSN 5306-944-7537 are used. Bolts longer than 53 / 64-inch can be threaded completely through the coupling flange and dent the diaphragm pack. This will create a high stress point and possible premature coupling failure. Figure 7-29. Removing fuel injection pump drive gear train backlash and setting advance unit retard position- diaphragm coupling. 7-21