TM5-3820-256-10 Table 3-12.  Fuses Blow when Motor Starts (Cont'd.) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 6 DEFECTIVE CABLE to each motor lead. cable is good, the motor winding OR MOTOR WIND- If the needle moves a is grounded; then contact direct ING CONT'D. lot, a ground is indi- support maintenance. cated in either the motor or the drop cable. 7. SHORTED OR OPEN Disconnect the motor Pull the pump and repair or re- MOTOR WINDING. leads from the control place the motor or drop cable. box; note length and size of drop cable, then use an ohmmeter to check resistance.  Low (or no) resistance will indicate a shorted motor winding.  High resistance (no or very little needle movement) can mean an open circuit in winding or broken, but not exposed, lead cable conductor. Table 3-13.  Pump Runs, But Delivers Little or No Water. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. PUMP IS AIR Listen for pump running Start and stop pump at one min- LOCKED. but no water noise is ute intervals.  Normal delivery detected. may resume 2. LOW WATER Water delivery is good Throttle the pumps delivery LEVEL IN WELL. at start up, but delivery through a restricting valve.  Lower diminishes after a time. the pump setting if depth of well Pump capacity is great- is adequate. er than well's ability to produce.  Pump may be set in sand. 3. PUMP ROTATING Low water delivery or Correct pump (motor) rotation IN WRONG DIREC- low pressure may indi- by properly connecting the drop TION. cate the pump is oper- cable wires. ating in the wrong direction. 4. CHECK VALVE Step 1.  If no water is Valve must be removed. STUCK OR IMPRO- being delivered, valve is PERLY INSTALLED. installed against the flow. Step 2.  If drop pipe is Cut off a portion of the drop screwed into the check pipe threads. valve too deep, it may be jamming the valve in the closed position. 3-59