353
Dixon Sanitary 2014
800.789.1718
Pump
Problem
Possible Cause
Suggested Action
Excessive Vibration/Pump is Noisy
Pump not level.
Inspect installation of pump and correct
level.
Non-supported piping.
Verify piping support follows
recommendations in installation portion of
this manual.
Not enough or no material reaching
pump.
Inspect pump to verify there is no
blockage. Inspect suction line and
shorten or enlarge.
Insufficient NPSH (Net Positive Suction
Head) available.
Adjust system to provide correct NPSHa.
Impeller and/or shaft worn.
Replace worn parts.
Shaft loose or bent.
Readjust shaft settings, tighten shaft
screws if loose. If bent, replace shaft and
inspect impeller hub for uneven wear,
replace impeller if worn.
Impeller out of balance.
Inspect shaft if loose or bent. If impeller
damaged, replace.
Foreign material in pump.
Remove any foreign material and replace
any worn or damaged parts.
Excessive air in material.
Make any adjustments in system to
insure excess air is removed before
material reaches the pump.
Motor bearings worn.
Replace any worn ports or replace motor
if needed.
Rapid Seal Wear
Improper installation of mechanical seal.
Adjust mechanical seal installation.
Replace any worn or damaged parts.
Dry running.
Material must be in contact with seal at all
times. Catastrophic failure will occur.
Abrasive product.
Contact: Dixon Sanitary 800-789-1718
Shaft loose or bent.
Readjust shaft settings, tighten shaft
screws if loose. If bent, replace shaft and
inspect impeller hub for uneven wear,
replace impeller if worn.
Water hammer.
Correct system to prevent any quick
starts and stops.
Improper seal for application.
Contact: Dixon Sanitary 800-789-1718
Pump Leaks
Inlet/Outlet
Inspect for missing union gaskets,
loose connections or damaged ports.
Replace worn gaskets and tighten loose
connections. Damaged ports repair or
replace.
Casing clamp loose.
Tighten clamp.
Casing gasket damaged or worn.
Replace gaskets.
Seal not installed correctly.
Reassemble seal properly. Replace any
worn or damaged parts.
Carbon seal worn or damaged.
Replace any worn or damaged parts.
'
D' seal back plate worn.
Resurface or replace. "DG" option should
be considered.
Any Other Issue
Contact: Dixon Sanitary 800-789-1718
Troubleshooting
V