Viking Pump TSM845: K-KK 825, 823, 827 - Manual (Page 13)

SECTION TSM 845 ISSUE F PAGE 13 OF 14
Some of the following may help pinpoint the problem:
Pump does not pump:
► Lost its prime from air lead or low level in tank
► Suction lift too high
► Rotating in wrong direction
► Strainer clogged
► Bypass valve open, pressure relief valve set too low or
pressure relief valve poppet stuck open
► Improper end clearance
► Pump worn out
► Any changes in liquid, system or operation that would
influence pump or coupling performance, e g new liquid,
additional lines or process changes
► Temperature changes either in the liquid or the
environment
► Magnetic coupling is decoupling Change in application
(temperature, pressure, viscosity,’ etc ) may require
torque beyond coupling capabilities
Pump starts, then loses its prime:
► Supply tank empty
► Liquid vaporizing in the suction line
► Air leak or air pocket in the suction line
Pump is noisy:
► Pump is being starved (heavy liquid cannot get to pump
fast enough) Increase suction pipe size, reduce length
or slow down pump
► Pump is cavitating (liquid vaporizing in suction line)
Increase suction pipe size or reduce length
► Check alignment
► Magnetic coupling decoupled Shut off and restart
Pump not delivering up to capacity:
► Starving or cavitating - increase suction pipe size or
reduce length
► Strainer partially clogged
► Air leak somewhere in suction line
► Running too slow Is motor the correct speed and
wired up correctly
► Pressure relief valve set too low, tuck open or has
damaged poppet / seat
► Bypass line around pump partially open
► Pump worn out or too many gaskets
Pump takes too much power (stalls motor):
► Liquid more viscous than unit sized to handle
► System pressure relief valve set too high
► Coupling misaligned
► Bushings frozen up or liquid set up in coupling
TROUBLESHOOTING PUMP INFORMATION
Pump Model Number:
Serial Number:
Date Received:
Date Installed:
Distributor:
Contact Person:
Phone:
Fax:
E-mail:
Comments: