Quantcast FIGURE 3-13.  Battery Charging Alternator Test Circuit - TM-9-2815-256-24_58

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ARMY TM 9-2815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5 i. Install through bolts (19) and tighten evenly 50 to 60 in-lbs (5.65 to 6.78 Nm). j. If  necessary,  remove  through  bolts  (19)  and  (20)  and  stator  (22)  to  align  housings  as  match  marked  on disassembly.  Reinstall bolts and torque evenly 50 to 60 in-lbs (5.65 to 6.78 Nm). k. Insert strap (14) of rectifier bridge (18) through slot in diode-trio (17) body.  Bend strap (14) over B+ terminal and secure with cone washer (13) and nut (12). I. Apply thin film of heat sink compound (5202217) to back of rectifier bridge (18) and mating area of rear housing (20) m.   Install diode-trio (17) and rectifier bridge (18) on rear housing (20) with bolts (16) and connect stator leads with screws (15).  Remove tags. n. Install voltage regulator (11) to rear housing (20) with insulating washers (10) and bolts (9). o. Install brush assembly (8) and strap (7) with nuts (6) and washer (33). p. Position felt gasket (5) in back cover (4) and install back cover on rear housing (20) with bolts (3). q. Install terminal washers (2), terminal nuts (1), and jumper (18, FIGURE 3-5). r. Perform battery charging alternator performance test as follows: (1) Mount battery charging alternator on test fixture capable of providing 5000 alternator rpm. CAUTION Make   sure   connections   are   tight   to   avoid   possible   damage   to   instruments,   battery   charging alternator, or wiring due to short circuits. (2) Set up test circuit as shown in FIGURE 3-13. FIGURE 3-13.  Battery Charging Alternator Test Circuit NOTE Carbon pile and ammeter must be capable of handling the alternator rated output. (3) Starting with the carbon pile off, slowly increase load while observing ammeter and maintaining 5000 rpm. Increase load until an output voltage of 27.0 to 29.0 VDC is achieved.  Record the output current at this point.  Acceptable current is 38 amperes at 70 to 80°F (21.1 to 26.7°C). Change 3 3-34


 


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