Quantcast Cleaning and Inspection (cont) - TM-5-4210-233-14P-1_772

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Cleaning and Inspection - TM-5-4210-233-14P-1_771
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TM-5-4210-233-14P-1 Twin Agent 4x4 Firefighting Truck Model No. CM-KFT-B Manual
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Assembly - TM-5-4210-233-14P-1_773
TM 5-4210-233-14&P-1 5-18.  ALTERNATOR-Continued (4) Check rectifier bridge with a multimeter. (a)   Place negative lead on grounded heat sink (1). (b)   Touch positive lead firmly to metal diode clips (2) that surround the studs. All three readings should be the same and indicate open circuits.  Switch leads and repeat test.  All three readings should indicate continuity. (c)   If all readings are correct the rectifier bridge is good.  If any reading is incorrect an open or shorted diode is indicated and bridge should be replaced. (5) Inspect bearing and bushing for wear and damage. (6) Check connectors for bent, cracked and damaged condition. (7) Use a multimeter to check rotor field resistance. (a)   Place leads on the two slip rings (3). Meter should read 2.2 to 3.1 ohms.  If reading is not within specifications, replace rotor. (b)   Check for a grounded field by touching one lead to slip ring (3) and one lead to rotor frame (2) or rotor shaft (4). (c)   Reading should be infinite (open) to show that field is not grounded.  If field is grounded, replace rotor. (8) Replace all damaged or unserviceable parts. 5-102

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