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● Alignment adjustment
Alignment adjustment
Alignment adjustment
Alignment adjustment
<Direct-driven type>
<Belt-driven type>
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● Start-up
Start-up
Start-up
Start-up
（1）
（2）
（3）
（4）
（5）
（6）
（7）
（8）
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● Caution during operation and shutdown
Caution during operation and shutdown
Caution during operation and shutdown
Caution during operation and shutdown
（1）
（2）
Make an adjustment with a
straightedge so that the outer edges of
the shaft couplings on the right and left
can align with each other and clearance
(a) can be uniform over the entire
circumference.
Use a straightedge or string to avoid
misaligning the pulley.
Adjust the V belt tension. Avoid over-
tension and under-tension.
Turn the pump by hand to check whether or not it rotates smoothly and if there are any
variations in the rotation speed.
- 3 -
Piping should be contigared so that air does not collect in the suction pipe and the pipe is
ascending toward the pump.
Make sure that air does not leak through the connections. Any leak will affect the pump’
s self-priming performance.
Freezing temperatures during winter can damage the casing. Remove No.8) drain cover
during the shutdown of the pump to drain water from the pump.
No external adjustment is required because a special mechanical seal is used for the
shaft seal unit.
The pump has been aligned at our factory prior to shipment. However, misalignment may
occur during installation of the pump or piping. Check the pump for any misalignment once
the installation is finished, and realign the pump when needed. Operating the pumps while
misaligned can cause premature failure.
For both suction or force pumps, ensure the suction pipe is as short as possible and
minimize bends in the pipe.
Observe the No.18 sight glass occasionally during operation or shutdown to check for oil.
If there are impurities seen in the oil or the oil level is running low, shut down the pump,
remove No. 19 oil drain plug to replace the old oil with new oil. Check two to seven days
later whether the impurities return or not. If the oil becomes dirty within a short period of
time, replace the mechanical seal with a new one.
(For the adequate amount of oil, see Table-1.)
*The mechanical chamber is filled with oil prior to shipment. If the pump is left
unattended without operation for a long time after delivery, be sure to check the oil level
before operation and fill up the oil to proper level.
Be sure to install an air vent valve on the discharge pipe.
The installation of an air vent valve will shorten the self-priming time and ensure water
pumping.
Before operating the pump for the first time, fill the pump casing with water through the
opening of No. 9 priming cover.
After checking the rotation of the motor, install the coupling rubber and bolt or V belt.
Before tightening the coupling bolt on the pump or installing the V belt, turn on the motor
and check the rotation direction.
*The rotation direction is shown with an arrow. The motor must rotate clockwise facing
the pump seen from the bearing.
Straightedge
Straightedge or string