XPost: uk.d-i-y   
   From: NOTsomeone@microsoft.invalid   
      
   On 03/02/2025 21:03, N_Cook wrote:   
   > On 03/02/2025 19:31, GB wrote:   
   >> On 03/02/2025 19:01, N_Cook wrote:   
   >>> On 03/02/2025 17:45, Liz Tuddenham wrote:   
   >>>> N_Cook  wrote:   
   >>>>   
   >>>>> Only made a preliminary check o this 1KW pump and float switch in a   
   >>>>> sump, prior to dismantling ad exploring further.   
   >>>>> Sump full of water but no pump action. Moving the float about made no   
   >>>>> differece. Tapping the pump casing made the pump work until the float   
   >>>>> switch dropped to the cut off point.   
   >>>>> Refilling the sump and again no pump action until tapping the casing   
   >>>>> and   
   >>>>> again stopping properly. I cannot see what in the way of sticky motor   
   >>>>> brush or loose/corroded contact inside the motor housing could produce   
   >>>>> this symptom.   
   >>>>   
   >>>> You haven't said what sort of motor it is, but if it is a commutator   
   >>>> motor with brushgear, the fault could be worn-down brushes to the point   
   >>>> where one of them is almost-but-not-quite touching the commutator.   
   >>>> Tapping the motor gives some sort of contact and then the vibration of   
   >>>> the motor allows it to touch the commutator often enough to keep it   
   >>>> running.  This will give a fireworks display around the commutator and   
   >>>> will do considerable damage if it continues.   
   >>>>   
   >>>> If it is not a brush motor, a similar thing can happen if the terminals   
   >>>> have become loose.  The sudden shock torque as the motor starts is   
   >>>> enough to make contact and vibration will keep it running; then the   
   >>>> contact is lost again after the motor has stopped.   
   >>>>   
   >>>> The first things you need to check are what type of motor it is and   
   >>>> whether the supply is reaching the terminals in the connection box on   
   >>>> the motor casing.   
   >>>>   
   >>>   
   >>> The pump is a JTFS Mini Micro domestic sewage pumping station,   
   >>> probably JTFS190NN   
   >>> No type technical details found but no obvious external  starter cap   
   >>> outside the motor casing or casig bulge.   
   >>> The other consideration is it was installed 10 years ago, tested   
   >>> working then, but never heard to be working since.   
   >>> It should have worked in a flood situation last year but it did not   
   >>> (automatically of its own accord that is) , no maintainece or testing   
   >>> or inspection in those 10 years by the owner or anyone else.   
   >>   
   >> My BIL has a sump pump for his basement. It deals with any water   
   >> penetrating, as well as the stuff from the toilet in the basement. It   
   >> needed replacement, but that only cost around £70-80. Having seen that   
   >> your one costs around £800, I can see why you are so interested in   
   >> repairing it!   
   >>   
   >>   
   >   
   > We've looked into replacement rather than repair, seeing similar   
   > solids /dirty water capable combined pump and float switch. ToolStation   
   > and Machine Mart 70-120 squid but are trying to unravel submersible from   
   > submergible meanings as the counter staff don't know and such info not   
   > on/in the boxes.   
   > What was the failure process of your one?   
   >   
      
   I have no idea, I'm afraid! My BIL is completely non-technical. He 'got   
   a man in', who told BIL to get a new pump.   
      
   BIL had the basement excavated about 20 years ago. AFAIK, he's only had   
   one replacement pump since then.   
      
   --- SoupGate-DOS v1.05   
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