Tsurumi Pump LB-250 - User Manual

Questions and Answers

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coxadrianAug 19, 2025
Why is the pumping volume low on my Tsurumi Pump LB-250 Water Pump?
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  Melinda GrimesAug 19, 2025
  A low pumping volume in your Tsurumi Pump Water Pump can be attributed to several factors: * The impeller may be worn. If this is the case, replace the impeller. * The hose might be clogged or kinked. Minimize bends in the hose, and if operating in a dusty environment, consider placing the pump inside a mesh basket. * The strainer stand could be clogged or buried. Remove any debris from the strainer stand. * The motor may be rotating in reverse. Change the power connection to correct the rotation. * A 60Hz pump might be used at 50Hz. Check the nameplate and replace the pump or the impeller if necessary.
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Kyle WilliamsAug 22, 2025
Why does my Tsurumi Pump LB-250 generate vibration or noise?
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  Lisa LeachAug 22, 2025
  Excessive vibration or noise from your Tsurumi Pump Water Pump may indicate damaged motor bearings. If this is the case, replace the bearings.
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Douglas Hernandez DVMAug 25, 2025
Why does my Tsurumi Pump Water Pump start but stop?
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  Kyle JohnsonAug 26, 2025
  If your Tsurumi Pump Water Pump starts but then stops, several factors could be at play. The motor windings or cable might be damaged, so check them. An impeller could be blocked or choked. Also, wrong voltage or frequency could be the reason. Check the voltage under load if it seems too low. If a generating set provides power, the frequency may be inexact. Excessive viscosity or density of the liquid could also be the reason. Finally, there might be a wrong setting or thermal overload at the power source.
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Jesse CoxAug 28, 2025
How to troubleshoot a Tsurumi Pump LB-250 Water Pump that fails to start?
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  Aaron MartinAug 28, 2025
  If your Tsurumi Pump Water Pump fails to start, there are a few things to check. If a level control exists, ensure it's calling for the pump to start. Use a multimeter, portable lamp, or electric tool to verify power availability. Remove the pump casing and confirm that the impeller rotates freely and without noise. At the pump cable's end, check the insulation value of the earth lead (it should be over 20 M Ohm) and the winding's continuity.
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Cassandra GatesAug 31, 2025
What to do if Tsurumi Pump Water Pump head and flow are lower than expected?
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  Craig MontgomeryAug 31, 2025
  If your Tsurumi Pump Water Pump's head and flow are lower than originally, several issues could be responsible. There might be a restriction in the piping or excessive resistance in the discharge conduit (perhaps it's too high, too long, too small, or dirty inside). The impeller could be worn, partially choked, or severely narrowed by hard deposits. The strainer or inlet might be blocked, or the pump could be drawing air. Also, the liquid might be partly volatile or contain a high level of gas in solution.
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Danielle JohnsonSep 3, 2025
Why does my Tsurumi Pump LB-250 Water Pump generate noise or vibration?
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  Sierra GeorgeSep 3, 2025
  If your Tsurumi Pump Water Pump generates unusual noise or vibration, it could be due to a few reasons. The impeller might be severely damaged, or a bearing could be failing. Repair it at once. Also, check that the pump isn't lying on its side and drawing air. This could also indicate a high wear rate.
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Teresa RodriguezSep 6, 2025
What to do if my Tsurumi Pump LB-250 Water Pump starts but then stops?
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  Joseph AllenSep 6, 2025
  If your Tsurumi Pump Water Pump starts but then stops, it could be due to several reasons. The motor windings or cable might be damaged. The impeller could be blocked or choked. There might be an issue with the voltage or frequency, such as the voltage being too low, especially under load, or an inexact frequency if using a generating set. Additionally, the liquid might have excessive viscosity or density, or there could be a wrong setting or thermal overload at the power source. Do not open the motor; instead, check the items mentioned above.
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johnmoralesSep 9, 2025
Why is the head and flow of my Tsurumi Pump Water Pump lower than originally?
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  Erin FowlerSep 9, 2025
  If your Tsurumi Pump Water Pump's head and flow are lower than originally, it could be due to a restriction in the piping or resistance in the discharge conduit because it is too high, too long, too small, or too dirty inside. Alternatively, the impeller might be worn, partially choked, or severely narrowed by hard deposits. Another possibility is that the strainer or inlet is blocked. The pump could also be drawing air, or the liquid is partly volatile or contains a high level of gas in solution.
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Thomas EdwardsSep 12, 2025
What to do if Tsurumi Pump LB-250 Water Pump fails to start?
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  Heather LeSep 12, 2025
  If your Tsurumi Pump Water Pump fails to start, and if the pump is new or has been repaired and tested, check whether the level control is calling for the pump to start. Use a multimeter, portable lamp, or electric tool to check if power is available. Remove the pump casing and ensure the impeller can rotate freely and without noise. At the pump cable's end (never open the motor), check the insulation value of the earth lead (over 20 M Ohm) and the continuity of the winding. If the pump has been used satisfactorily before, pay special attention to the impeller, checking for stones or debris.
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Mr. Matthew TerryNov 15, 2025
What to do if my Tsurumi Pump LB-250 starts but stops immediately, causing the motor protector to trip?
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  patrickchavezNov 15, 2025
  If your Tsurumi Pump Water Pump starts and then stops immediately, tripping the motor protector, here are several potential causes: * There might be foreign matter wedged in the impeller. Inspect the pump and remove any debris. * The voltage could be too low. Ensure you are providing the rated voltage or use an extension cable that meets the required specifications. * A 50Hz unit might be used at 60Hz. Check the nameplate and consider replacing the pump or the impeller. * The pump may have been operating for an extended period with a clogged strainer stand. Clear any debris from the strainer stand. * There could be a motor malfunction, such as seizure or water leakage. In this case, repair or replace the motor. * The pump might be drawing in too much mud. Place a concrete bloc...