Goulds Pumps 3996 - IOM - Manual (Page 50)

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3996 IOM 9/2010
13 Impeller clearance too great. Check for proper clearance.
14 Impeller damaged. Inspect and replace as required.
15 Rotating parts bind. Check internal wearing parts for proper clearance.
16 Shaft bent. Straighten or replace as required.
17 Coupling or pump and driver misaligned Check alignment and realign if required.
18 Impeller diameter too small Consult factory for proper impeller diameter.
19 Improper pressure gauge location Check correct position and discharge nozzle or pipe.
20 Casing gasket damaged Check gaskets and replace as required.
21 Speed too high
Check motor winding voltage or steam pressure received
by turbine.
22 Head lower than rating; pumps too much liquid Consult factory. Install throttle valve, cut impeller.
23 Liquid heavier than anticipated Check specific gravity and viscosity.
24
Stuffing box not properly packed (insufficient packing,
not properly inserted or run in, packing too tight)
Check packing and repack stuffing box.
25 Incorrect packing or mechanical seal Consult factory.
26 Damaged mechanical seal Inspect and replace as required. Consult factory.
27 Shaft sleeve scored Remachine or replace as required.
28 Cavitation Increase NPSH available. Consult factory.
29 Pump capacity too low Consult factory for minimum continuous flow.
30 Excessive vibration See Preventive Maintenance / Vibration.
31 Improper bearing lubrication or bearings worn out Inspect and replace as required.