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

TM 9-2815-220-34 clamps on the fuel inlet hose (4), three cushioned clamp on the crankcase b1·eather tu be (3) and three cushioned clamps on the electrical lead (2). Position clamps as shown in figure 3-52 and secure with three screws and self-locking nuts. a.1. Install a new breather tube adapter gasket on crankshaft clamper and filter housing. Install breather tube adaptel' (7, fig. 3-52.1) on housing and secure with two self-locking nuts. lnstal1 crankcase breather tube with hose and hose clamps(6). Connect fuel inlet hose(4) and electrical lead(3) at the fuel injection pump. Install two cush- ioned clamps (5) on electrical lead (3) and breathe1· tube. Install six cushioned clamps (2) securing electrical lead (3) and fuel injection pump fuel inlet hose (4) to the breather tube. Secure clamps with two df-locking nuts and machine screws. Install two cushioned clamps (I) securing fuel retu hose to the breather tube. b. Inst all cushioned clamp (6, fig. 3-51 ) on turbosuperchasger oil inlet hose (10) and cushioned clamp (7) on fire extinguisher tube and secure clamps to rear fan d1ive housing with self-lockfog nut. Install cushioned clamp (5) on crankcase breather tube (9) a11d secure to rear fan d-r ive housing with self-locking nut and flat washer. Install fuel retu check valve (4) iJ1 elbow in the injection pump and connect fuel retu hose (3) to the check valve. Install cushioned clamp (2) on fuel return hose and cusl . lioned clamp (l) on turbosupercharger oil hose, pos1lion clamps as shown in figure 3-51 and secure with screw and self-lock mg nut. b.1. Instal l turbosupercharger oil hose cush- ioned clamp (1, fig. 3-51.1) and fuel retu hose cnsltioned amp (2) and secure with one machine screw and self-locking uut. Connect fuel retu hose (3) to elbow in fuel retu check valve (4). Install fuel retu hose cushioned clamp (5) and bt·eather tube cushioned clamp(6) and secure with one machine screw and self-locking nut. Install fire exting uisher tube cushioned clamp (7) and secure with one self-l ocking nut. Install breather tube cushioned clamp (5, fig. 3-51) and secure wi th·one self- locki ng nut and flat washer. 3-176. Exhaust Pipes and Manifolds a. lnstaJJ exhaust manifold 4R, 5 R, 6R usi11g new gaskets and secure to cylinders wiU1 twelve � self-locking nuts and flat washers (9, fig. 3-SO). Install exhaust manifold elbow 4R, SR, GR using new gasket and secure to the exhaust manifold witl1 four self-locking nuts, Oat washers and bolts H (7). InslaU exhaust mai1ifold and exhaust elbow 41, SL, and 61 i n the same manner. b. Install crankcase breather tube hose on breather tube an secure loosely with two hose 3·238 Change 3 clamps (4). Install new gasket, restrictor (6), new gasket and tube tee (in that order) on rear fan drive housing, and secure with two bolts and lock- washers (5). Slide crankcase breather tube hose I over tube tee and secure with hose clamps (4). M Install breather tube tee hose and secure with hose clamp. c. Install exhaust manifold IL, 2L, 3L (3) usi ng I new gaskets and secure to cylinder with twelve self-locking nu ts and flat washers. Install exhaust manifold elbow l L, 21, 3L (2) using new gasket I and secure to exliaust manifold with four self-lock- ing nuts, flat washers and bolts (I). d. lnstaJJ exhaust manifold I R, 2R, 3R using new gaskets and secure to cylinder with twelve self-locking nuts and flat washers (3, fig. 349). 1 Install exJ1aust manifold elbow IR, 2R, 3R (2) using new gasket and secure to exhaust manifold with four self-Jocking nuts, flat washers and boJls(l ). 3"177. Fuel Injector Clamps, Supports and Tubes NOTE Special precautions must be taken to en- sure that all fuel injection pump tubes terminate at the proper cylinder (fig. 3-48). Incorrect hook up of the injector tubes to a wrong cylinder or injection pump connection would result in damage to the piston rings and cylinder walls and severe damage to the engine if operated under full load. ct. Individually install six fuel injectot· tubes from cylinder Nos. lL through 6L to fuel injection pump rear hydraulic head. To assure adequate wrench clearance connect tubes to rear pump head in the foll owi ng order 5, 3, 6, 2, 4 and 1. Start fittings on pump head and injector nozzle and holder assem- bly by hand until sleeve is seated. When sleeve is seated, an increase in torque will be evident. When th.is point is reached, torque tighten to 300 pound-inches. Tighten all fuel injector tube sup- port nuts to 125 pound-inches. NOTE Overtightening will damage the support sleeve and cause fuel leaks. Overtighten- ing the support nut can fracture the sup- port sleeve and result in injector tube failure at this location. b. Individually instaJI six fuel injector tubes om cylinder No. IR through 6R to front hydraulic head. To assure adequate w1·ench clearance con- nect tubes to front pump head in the following order 2, 4, 1, 6, 5 and 3. Secure tubes to pump head )