TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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TESTING 1. Air pump CAUTION Do not exceed 18 volts direct current on air pump. Excessive voltage will overspeed air pump and damage pump vanes. NOTE Install vanes, plate, and screws in air pump before testing. Use fabricated test lead (Figure 2, Item 16) to reduce a 24 V dc power source to 18 V dc. Connect test lead in series with positive terminal of power source. a. Connect an 18 V dc power source to air pump (Figure 2, Item 7). Connect positive lead to terminal (Figure 2, Item 18) marked (+) and negative lead to unmarked terminal (Figure 2, Item 17). NOTE Use digital multimeter to measure amperage. Adapt pump outlet to fit a tire pressure gage or other suitable measuring device to measure air output pressure. b. Measure air pressure and amperage. Air pressure at outlet port elbow (Figure 2, Item 15) must be a minimum of 10 PSI at 18 V dc. Pump must draw a maximum of 25 amperes. c. Remove power source from terminals (Figure 2, Item 17 and 18). 16 17 18 15 7 24 V DC + MAINT_205 Figure 2. Air Pump Testing. 2. Ignition coil and igniter NOTE Ensure high tension wire used for testing is in good condition. a. Connect high tension lead (Figure 3, Item 23) to ignition coil (Figure 3, Item 4) and fuel igniter (Figure 3, Item 21). b. Connect air heater assembly (Figure 3, Item 22) and ignition coil (Figure 3, Item 4) to common ground (Figure 3, Item 19). TM 9-2815-205-24 0074 0074-4