TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Note. Before removing bolts and self-locking nuts securing the components of the advance assembly, check alinement and legibility of scribe marks on adjusting ring boss, flyweight, and drive gearshaft flange. The marks must be alined to insure proper assembly. If the scribe marks are not alined, scribe a new line on the gearshaft flange in alinement with the ring boss scribe line. Identify the new line using a prick punch dot or some other method. The new gear flange mark and ring boss must be in alinement for proper assembly. 1. Remove intermediate bearing support (A). 2. Remove eight cotter pins, slotted nuts (B) and two flat washers. 3. Remove six bolts (C). Figure 6-175. Removing advance flyweight adjusting ring and injection pump drive gearshaft attaching parts (adjusting ring secured with nuts and washers). 1. Remove intermediate bearing support (A). 2. Cut locking wire (B). 3. Remove six bolts (C). 4. Remove two cotter pins, slotted nuts (D), and flat washers. Figure 6-176. Removing advance flyweight adjusting ring and injection pump drive gearshaft attaching parts (adjusting ring secured with bolts). 6-146