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. The fuel injection pump diaphragm coupler parts are not matched sets, and parts are interchangeable between assemblies. The coupler hub and pilot ring on the drive shaft need not be removed or replaced unless they are damaged. Check torque tightness of nut securing coupler to drive shaft (900 lb-in.). Figure 4-76. Fuel injection pump diaphragm coupling and pilot ring on hub before pump installation. Note. Be sure lower right fuel injection pump mounting bolt is inserted in injection pump before pump is seated on mounting base. It cannot be installed with pump in position. Refer to figures 4-55 and 4-56 to secure pump to base. Figure 4-77. Installing fuel injection pump assembly on engine. Note. Be sure preformed packing (fig. 4-63) is installed in coupler sleeve. 1. Postion fuel injection pump coupler sleeves (A) making sure timing marks on bearing retaining plate and coupler hub remain alined as shown. These marks must be alined before attempting to assemble the coupler. 2. Loosely position four lock plates, lock washers, and bolts (B) in drive shaft coupler sleeves. These bolts will not be tightened until gear backlash has been removed, with timing marks on pump alined as instructed in figure 4-79. Figure 4-78. Positioning fuel injection pump coupler sleeve s-splined coupler. 4-39