Figure 4-33. No Load Test Circuit

TM-9-6115-604-12 Generator Set Diesel Engine Driven Tactical Skid Rtd. 60 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-604-12 NAVY NAVFAC P-8-633-12 CAUTION Do not allow the starter motor to operate more than 30 seconds. Allow It to cool at least 2 minutes before deenergizing the motor. Overheating will damage the motor. (1 ) Connect the starter assembly, see figure 4-33. (2) Use power supply to obtain 20 V dc on the voltmeter. (3) Using RPM gage and ammeter, check starter motor speed. At a minimum current draw of 95 amperes rpm should be at 5500 Motor speed at the maximum current draw of 120 amperes should be 7500 rpm (4) Connect the starter motor See figure 4-34. Figure 4-33. No Load Test Circuit Figure 4-34. Circuit For Checking Pinion Clearance Do not touch exposed electrical connection when a source of power such as utility power or another generator set is connected to the load terminals. Death or injury may result from failure to observe this warning. (5) Momentarily flash a jumper lead between terminals M and G. The dove will shift Into cranking position and remain so until the battery Is disconnected. (6) See Figure 4-35. Push on drive to eliminate slack. (7) Measure the distance between the pinion and the interior nose housing wall with a feeler gage. Distance should be within the 21/64 to 25/64 inch range. (8) Disconnect test set up. (9) Replace entire starter assembly if solenoid is bad. 4-89

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