TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220-34 l Straight adapter 2 Vent line 3 Lꝏp clamp 4 Tube tee 5 Vent line 6 Vent line TA265723 I Figure 3-2Z. Oil coolel' l'11l /i11rs -exploded viw. electrical circuit or improper torque setting of aco nut. Loosen aco nut and torque tighten nut to 50 pound inches. Recheck solenoid opera- tion. If valve is still inoperative, replace valve. c. Assembly. (I) I n stl new prermed packing ( 16, rig. 3-280) on filter bowl (17). Install filter el ement (IS) in bowl (17) and install filter head (14) on bowl. (2) Position heater fuel retu solenoid valve (21, fig. 3-268) on mounting bracket (27) and install two assembled washer bolts (29) and flat washer (28) securing solenoid valve to bracket. Install cou- pling (22), elbow (23) and tee (24) in inlet side of the solenoid valve. Install elbow (20), nipple (19), fuel check valve (25) and elbow (16) in the outlet side of the solenoid valve. NOTE Arrow on check valve indicates the direc- tion of fuel now. (3) Install inlet tube connector (30, fig. 3-267) in manifold heater fuel filter. Install connecting nip- ple (38) between fuel filter and manifold heater fuel solenoid valve (37). Position fuel filter with solenojd valve on filter bracket (12, fig. 3-282) and install two sct·ews (15), lockwashers (16) and flat washers (14) securing filter to bracket. Position solenoid mount- ing bracket (33, fig. 3-267) and install four assem- bled washer bolts (31) and four flat washers (32) securing solenoid bracket (33) to filter mounting (4) Solenoicl valves. Plug valve inlet and outlet bracket and solenoid valve (37). Install elbow (36) openings to prevent entrance of foreign material. and tube tee (36, fig. 3-268). Clean the solenoid valves with a cloth moistened NOTE with dry-cleaning solvent. The valves contain rub- Solenoid valves can be adapted to fit dif- ber parts and should not be immersed in solvent. ferent applications on the engine. Orien- Inspect the solenoid valves for cracks and dents. tation of bottom unit with respect to top Install suitable fittings, actuate solenoid valve unit can be changed through 360 degrees with 24 volt de current, and pump fuel through the by loosening the aco nut at the bottom valve. When fuel flows freely, valve is functioning of the valve. Torque tighten acorn nut to normally. Restricted fuel flow indicates a faulty 50 pound-inches after positioning. Section XXV. REPAIR OF FUEL INJECTION PUMP DRIVE COUPLING, FUEL INJECTOR NOZZLES, PISTON OILER NOZZLES, TIME TOTALIZING METER, AND STARTER LOW VOLTAGE PROTECTIVE MODULE 3-144. General This section covers the repair of the fuel injection pump drive coupling, fuel injector nozzles, piston oiler nozzles, and time totalizing meter. Specific instructions on disassembly, cleaning, inspection, and assembly accompany the repair instructions. 3-145. Fuel Injection Drive Coupling a. Disassembly. (I) Refer to figures 2-45 nnd 246 to remove front coupling sleeve and hub from injection pump. 3·202 Change 3 (2) Separate front coupling sleeve (18, fig. 3-232) and injection pump hub (10). Remove ring (16) from coupling sleeve and remove woodruff key (2) from pump shaft. NOTE Keep front coupling sleeve and hub to- gether. Place them with the rear coupling sleeve and drive shaft hub on rear fan drive housing. Check identification marks made during engine disassembly (fig. 2-43) to make sure these parts match. The ) )