Sumitomo QT Series - Operating Environment; Precautions for Operation; Cleaning the Interior of the Tank; Introducing the Hydraulic Fluid

HMP-0567E Rev.7 (13/19)
11) Operating environment
Do not use the pump in an unusual (e.g., hot or humid) atmosphere. Be sure to use the pump
under the following operating conditions:
Ambient temperature: −15 to 50°C
RH (Relative humidity): 0 to 95%
It is assumed, as a standard, that the pump will be used indoors. Please contact us regarding
use in an unusual environment.
: AVOID USE IN AN EXPLOSIVE ATMOSPHERE. SUCH USE COULD CAUSE A FIRE
OR ACCIDENT RESULTING IN INJURY OR DEATH.
4. Precautions for Operation
1) Cleaning the interior of the tank
Clean the interior of the tank prior to introducing hydraulic fluid into it.
2) Introducing the hydraulic fluid
a) Introduce a sufficient volume of hydraulic fluid, also taking the internal volume of the actuator
into account.
b) Bubbles may be formed if a motor-driven pump etc. is used to feed in hydraulic fluid. If this
occurs, start operation of the pump after the bubbles have disappeared.
3) Rechecking the direction of rotation
Recheck that the direction of rotation of the motor matches the direction of rotation of the pump.
4) Pump start-up
: ON-LOAD STARTUP IS NOT SUPPORTED. ON-LOAD STARTUP WILL CAUSE
DAMAGE TO THE INTERNAL PARTS OF THE PUMP.
In the following cases, the suction pipe must be bled of air.
- When the unit is being operated for the first time;
- After replacing the hydraulic fluid;
- After cleaning the suction filter.
First, confirming that the tank is filled with hydraulic fluid and open the relief valve in the delivery
line.
Then we recommend the following steps.