Sumitomo QT Series - Page 17

HMP-0567E Rev.7 (17/19)
C) Suction filter
Overhaul
inspection
1 to 3 months
For a suction filter with an
indicator, cleaning or
replacement should be
performed within the
period in which the
indicator is yellow.
If the environment
surrounding the
system is unfavorable,
the interval between
inspections should be
shortened.
If the suction filter
becomes clogged, the
volume of sound
produced by pump
operation increases.
D) Status of
pump operation
D-1) Sound of
pump
Auditory
inspection
1 month
The volume of sound
produced by the pump is
no larger than when the
pump was operated for
the first time.
Attention should be
paid to looseness of
the suction pipe due to
vibration, and entry of
air due to abrasion of
the pump shaft seal,
etc.
D-2) Pump
main body
temperature
Thermometer
1 month
≤ Fluid temperature
during suction +15°C
D-3) Pump
vibration
Tactile check
1 month
No abnormal vibrations
are felt.
A check should also be
performed on the
pump delivery pipe.
Abrasion of the
coupling.
D-4) Pump
displacement
Actuator speed
1 to 3 months
No reduction in actuator
speed has occurred.