Table 3-3. Water System Troubleshooting-Continued
TEST OR INSPECTION
Step 6. Check for incorrect top clearance between rotor and pump
Disassemble pump and realign rotor.
8. PUMP VIBRATES OR OPERATES NOISILY.
Check for loose mounting.
Tighten pump mounting bolts.
Check if foreign matter has entered the pump.
Clean the pump by flushing.
Check if foreign matter has entered the pump and cannot be
removed by flushing.
Disassemble and clean the pump.
Check if rotor and housing are touching causing a metallic
Disassemble the pump and realign motor.
9. PROPER CLEARANCE BETWEEN ROTOR AND PUMP HOUSING CANNOT
Worn paper gaskets on motor side of the pump body.
Disassemble the pump, remove and replace gaskets.