TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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parts are mated and must be kept to- gether. b. Clecm'ing, ln�pection, cind Repair. Refer to paragraphs 3-36 through 3-38. Inspect the front and real' coupling sleeves and hubs for wear and mutilation and for fit with the splines of mating parts. Mating splines must match without binding and with a maximum total backlash of 0.006 inch from input end through the output end. Check the dngs (16) and (9, fig. 3-232) for cracked or torn condition and for deterioration. c. Assembly. (1) Install woodruff key (2, fig. 3-232) in pump shaft. Install ring (16) in internal groove of front coupling sleeve (18). (2) Install injection pump hub (15) in coupling sleeve. Refer to figure 2-45 to install hub and sleeve on pump shaft and install preformed packing. 3-146. Fuel Injector Nozzle and Holder As- sembly Refer to par agr aph 2-48b through 2-48g and f i gure 2-133 r repair of the fuel injector nozzle and holder assembly. 3-147. Piston Oiler Nozzle Assembly a. Disassembly. Do not remove nozzles (fig. 3-291) unless the nozzle or holder cannot be cleaned without disassembly. To remove nozzles, position holder in a soft-jawed vise and remove nozzles. TM?20JJ F'ig1o·e 3-91. Piston oiler nozzle and holder assembly. b. Cleaning, lns7Jection, and Repair. Refer to paragraphs 3-36 through 3-38. Make sure oil pas- sages in holder and oil holes in nozzles are clean and free of obstction. Replace nozzle and holder as necessary, when oil passages and oil holes can- not b e cleared of obstructions. c. Assembly. Refer to figure 3-291 to install the nozzl e in the holder if removed at disassembly . Stake nozzles on t hree tlats, 120 degrees apa r l . TM 9-2815-220-34 3-148. Time Totalizing Meter a. Inspection. Inspect the time totalizing meter for dents or other deformities which would impair its function. b. Test. Test the totalizing meter to be sure it is functioning properly by connecting tl1e meter elec- trical connection (fig. 3-292) to a 24 volt electrical system. The time totalizing meter is calibrated to record the electrical impulse in tenths of an hour and will numerically record every six minutes. Allow sufficient passage of time to be certain hour counter is performing properly. NOTE The time registered to test the time to· talizing meter should be recorded on the engine build record. TAOZ8600 Figure 3-292. Engine lime mele -r:cµloded view. 10.1. Starter Low Voltage Protective Module a. Inspectio11. Inspect the low voltage prot ect ive module for damaged electrical c onnector threads, dents or ot her deformities that would i mpai r its [unction. b. Function Test. Tesl t he low voltage protective module function as follows: (I) Connect lhe positive(+) lead of a variable zero to 24-vdc power supply to pin A of the module. Connect U1e negative (-)·lead to the module case. (2) Set the output of the power supply at I 0 vdc. Using an olunmeter, check for continuity between pins B and D. The meter should show an open circuit. (3) GraduaUy increase the voltage while con- tinuing to check for continuity between pi ns B and D. Continuity should be acleved at 12.25 (±.SO) vdc and maintained to 24 vdc. Change 3 3·202.1