(C) The volume of
noise is large.
The hydraulic fluid in the tank
looks cloudy due to the
presence of bubbles.
Check if air is being drawn in from the suction pipe.
The suction pipe/suction filter
is partially clogged.
Clean the suction pipe and suction filter.
The fluid temperature is too
low.
Viscosity is too high.
Decrease the fluid temperature to a suitable value.
Exercise care when selecting the fluid to be used.
Abrasion of the coupling/
incorrect alignment between
motor and pump shafts
Reapply grease.
Check/adjust alignment.
If none of the aforementioned
problems were found, the
pump may be faulty.
(D) An abnormal
increase in fluid
temperature
occurs
There is no flow of cooling
water in the cooler.
Restore the flow of cooling water. Check that the valve
opens and closes correctly.
The cooling pipe of the cooler
is contaminated.
The temperature of the pump
main body is 25°C or more
higher than that of the fluid
during suction.
Replace the pump, as a pump fault may have caused
an abnormal increase in internal leakage.
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