TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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(7.2) On ModeJ AVDS-l 790-2DR, install two new smoke generating tubes and coru1ect tube nuts to tee (fig. 2-125.2). Secure tube adapters to exhaust manifolds and tighten tube nuts. Secure tubes to rear shrouds with two capscrews, self-locking nuts and loop clamps. (8) Install fuel injector tubes, tube clamps, cooling fan sluoud, cooling fans and cooling fan vanes (par. 2-2 lb). I 2-47. Fuel Backflow Valve (Models AVDS-1790-2C and AVDS-1790-20) a. Remal. (1) Disconnect fuel inlet hose (1, fig. 2-129) nnd TM 9-2815-220-34 . drain fuel in to n s uitabl e container. Disconnect manifold heater fuel line (2) and fuel pump fuel inlet tube (3). Remove two screws and lockwashers (4), and remove backflow valve (5) from mounting I bracket. (2) Remove and retain for installation in replacement backflow valve the fuel pump t ube I adapter (6) and fuel inlet hose adapter (7). Remove and retain as a unit the purge pump and fuel heater tube tee (8), reducer (9), ter (10) and elbow (11 ). NOTE Elbow (11, fig. 2-129) is required on Model AVDS-1790-2C only. Change 3 2-81