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  1. Al-Wazeery

    new motor getting overheating

    ear All,, Hi Tmoose,, First of all we inspect the shafts for both direction after dismounting the bearing shield housings,, we found some marks on the shafts under due to lip seal friction,, (see pic attached) we have run the motor solo w/out motor cooling fan & bearing shield housings with its...
  2. Al-Wazeery

    new motor getting overheating

    Hi Tmoose,, thank you for your help & reply,, 1- Is the contact seal part of the OEM motor design? Yes the contact seal part of the OEM motor design , its number (H218 ID 85, OD 110, TH 12 ) 2- Is the cavity between the seal lips being well greased at installation? I'm not sure I contact my...
  3. Al-Wazeery

    new motor getting overheating

    Many Thanks (32c4) for your replied,, Regards To : (1)& (2) We have replace the old bearing by new one (SKF) & New shaft contact seal before a few days,, Problem Still. (3) First we have working with recommended grease Mobilux EP 3, problem still ,,, then we use Mobilith SHC 100 spatial for...
  4. Al-Wazeery

    new motor getting overheating

    Yes,, that was our wondering,, you know motor ampere was 15A during solo test
  5. Al-Wazeery

    new motor getting overheating

    if we run motor solo, no way to say there is thermal expansion there .. is it right?
  6. Al-Wazeery

    new motor getting overheating

  7. Al-Wazeery

    new motor getting overheating

    Are the motor Bearing Clearance Class caused bearing overheating in sometime Or Not? In other words, If I have bearing C3 ,then I want to change its clearance class to C4 ,, Is this effective to reduce the bearing temp. If I know that the cause of overheating is due to this class???
  8. Al-Wazeery

    new motor getting overheating

    I mean by shield bearing housing = housing cover and spacer rim = bearing stopper ring side face
  9. Al-Wazeery

    new motor getting overheating

    Today I have do these activities : 1- Run the motor solo w/out shield bearing housing (after see some polishing on the spacer rim) --- Result temp. constant @ 57 2- Grind bearing spacer rim by using sand paper & motor running 3- Run our motor solo (uncoupled)& bearing covered with full Hz &...
  10. Al-Wazeery

    new motor getting overheating

    Are there any related between bearing spacer & shield bearing housing ,,, we have observed this zone hotter than other and some scratching/polishing @ top surface which it touch with each other it is possible to be the heating source due to friction ???!!
  11. Al-Wazeery

    new motor getting overheating

    Hi guys,, Any reply
  12. Al-Wazeery

    new motor getting overheating

    Dear Expert,, Today I have run our motor solo (uncoupled) as your recommended to me with full Hz & RPM (50, 2999), The temperature in the DE bearing & NDE was 59 °C & 48 °C (Because still hot from the last running before shutdown),, The test run was one hour only (readings taken every 10 min.)...
  13. Al-Wazeery

    new motor getting overheating

    Vibration readings for pump DE V = 1.16 mm/s H = 0.73 mm/s A = NA
  14. Al-Wazeery

    new motor getting overheating

    vibration unit mm/s for above readings
  15. Al-Wazeery

    new motor getting overheating

    Here I have question to you ( Mr. Tmoose & Mr. electricpete) IF there is too much axial load imposed by driven equipment or insufficient gap of the coupling , usually would show up on vibration (external), but our readings are very perfect For : V = 0.47 H = 0.48 A = 0.54 waiting your...
  16. Al-Wazeery

    new motor getting overheating

    Dear electricpete, I appreciate your kind replied ,, 1- Regarding to motor arrangement is Horizontal (multi stage pump) & Type of grease Mobilux EP3 2- The winding temp. very normal ,,, NO thermal imager we have ,but the hotter zone is the MTR DE bearing housing Zone especially upper place...
  17. Al-Wazeery

    new motor getting overheating

    Dear Tmoose. Many thanks for your kind replied,, 1- we monitored the temp. by temp. gun, unfortunately no sensor has been installed yet.. 2- First we will check axial gap of the coupling ( if insufficient we will correct as per manufacturer specifies) 3- Then we will run the motor solo (...
  18. Al-Wazeery

    new motor getting overheating

    Hi expert engineer,, could you please help me for my issue below : We commissioned a new pump with new electric motor (315 kw, 546 A, 2985 RPM, 50 Hz), but we have get rising in temperature (overheating) in the MTR DE bearing crazily during first four hours reach to 107 °C, so we stop the motor...

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