3-1-618 Page 26
PROBLEM
POSSIBLE
CAUSE
SUGGESTED
ACTION
3.
Pump cavitating.
3.
See Cavitation, Fluid Knock
or
Hammer
problem.
4. Corrosion.
4. Treat
pumped
fluid.
Use
different
materials
for
valves/seats.
Install
sacrificial
anodes
in
suction
manifold.
Catastrophic Failures Such As
1.
Pump overloaded.
1.
Reduce pump speed and/or
Broken Shafts, Bent Rods, etc.
pressure.
2.
Start-up against closed
2.
Insure valve is open
discharge
valve.
before
starting.
3.
Main bearing failure.
3.
Repair or replace.
4.
Frozen fluid in cylinder.
4.
Do not start pump when
pumped fluid is below
freezing
temperature.
5.
Lube oil pump failure.
5.
Replace oil pump.
6.
Low oil level in sump.
6.
Check oil level frequently,
and add oil as required.
7.
Contaminated oil in sump.
7.
Check oil condition
frequently.
8.
Cavitation shock loading.
8.
See Cavitation, Fluid Knock
or
Hammer
problem.
Stud Failures.
1.
Catastrophic failures.
1.
See Catastrophic Failures
problem.
2.
Improper nut torquing.
2.
Check torque specifications
and torque to correct values.
3.
Stud bending due to uneven
3.
Check nut seat surface for
nut seating.
flatness. Rework or replace
as
required.
4.
Corrosive attack by pumped
4.
Treat fluid or use corrosion
fluid.
resistant
studs.
5.
Studs damaged before
5.
Check condition before
installation.
installation, and replace if
necessary.
6.
Low
strength
studs.
6.
Use Gardner-Denver studs.
