YK10-0015-DI-002-03
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3.8 Check and Replace V-belt
WARNING
●When performing the work of the inspection/replacement of the belt,
perform the work after turning off the power switch without fail.
●The measures such as lockout/tag out should be executed not so as to
turn the power switch by mistakes during working.
The belt to connect the main body of pump and a motor to is made by rubber. When the belt
tension continues driving in an insufficient state…The belt is shorten the life-time by the wear. The
motor is shorten the life time by overheat. The pump is not start or not perform pumping speed.
Initial wear
Early operation, the belt tension decreases by the extension and fall
in the pulley groove. Re-tension the belt 24 hours later after initial
start. And 1week later, re-tension the belt.
Maintenance the belt
Please check the belt tension at once in a half year. If necessary, please re-tension the belt. In
addition, please change the belt, if there is an abnormality in it.
Measure the tension of the belt
1) Shut down the pump, and be sure to turn OFF the power supply.
2) Remove the belt cover.
3) Set the Ring for Deflection to “Table 5. Reference value of deflection volume”.
4) Set the Ring for Load to 0N.
5) Push the center of the belt, between the motor pulley and the pump pulley, down deflection
with tension meter.
6) Read the load after pushing. It is normal that the load is “Table 5. Range of deflection load”.
7) If the tension of belt is right, attach the belt cover.
Fig. 11 Belt tension measurement
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