XPost: uk.d-i-y   
   From: NOTsomeone@microsoft.invalid   
      
   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!   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)