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TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download

Page 133 of 532

2-29. Intake Manifold Assembly NOTE ror instructional purposes, replacement of the right intake manifold assembly is de- scribed in Lhis section. The left intake mani- fold assembly is replaced in Lhe same manner. a. Remal. (1) Remove cooling fan vanes, cooling fans, en- gine upper covers anq cooling fan shroud, refer to paragraph 2-21a. (2) Remove oil coolers. Refer to parag raph 2-27a. (3) Remove oil cooler support frame. Refer to paragraph 2-2. (4) Remove self-locking nut and machine screw (I, fig. 2-79) and self-locking nul and · loop clnmp (2) and disconnect manifold heater fuel inlet tube (3). (4.1) Remove self-locking nut and machine TM 9-2815-220-34 I Self-locking nut nncl machine screw 2 Self-locking nut nn loop cln mp 3 Manifold heater fuel inlet lube F'igure 2-79. DisconnectilO o'· con11ecting manifold heaterfuel inlet tube, model AV DS-J790·2C and AV DS·l 790·2D engines. screw (I, fig. 2-79.1). Remove sel f -l ocking nut (2) and remove tube clip from stud. Disconnect man- ifold heater fuel inlet tube nut (3). TA126076 l Self-locking nut and machine screw 2 Self-lking nut 3 Manifold heater fuel inlet lube nut Figure2-79.1. Disco1111ecli11g or co1111ecti11gmariifold heater fuel inlet lttbe, model A\f DS-I790·DR engine. (5) Disconnect cylinder head drain tube. Refer to fig. 2-80. (6) Loosen two hose clamps (1, fig. 2-81) and slide hose (2) down on lower front drain tube (3). Cut locking wire (4) and remove six body bolts (5) and remove cylinder head oil drain tubes (6) and manifold heater tube (7) as an assembly. Remove :ind discard twelve gaskets (8). (7) Loosen four hose clamps (I, fig. 2-82) and separate hoses (2). Slide one hose on the heater tube (3) and the other hose on the turbosuper- charger outlet elbow (4). Remove turbosuper- charger outlet elbow tube sleeve (5). Remove screw I and lockwasher securing cable clamp to spacer on intake manifold. (8) Remove eighteen nuts and lockwa she rs (6) and remove intake manifold assembly (7). Remove and discard six cylinder fla11ge gaskets (8). Change 3 2·70.1