Flowserve 6LR-18A, Manual

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LR, LRV, LLR and LR-S USER INSTRUCTIONS ENGLISH 71569088 08-10
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FAULT SYMPTOM
P u m p o ve r h e a ts a n d s e i z e s
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B e a r i n g s h a v e s h o r t l i f e
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P u m p vi b r a t e s o r i s n o i s y
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M e c h a n i c a l s e a l h a s s h o r t l i f e
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M e c h a n i c a l s e a l l e a k s e x c e s s i ve l y
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P u m p r e q u i r e s e x c e s s i ve p ow e r
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P u m p l o s e s p r i m e a ft e r s ta r t i n g
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I n s u f f i c i e n t p r e s s u r e d e v e l o p e d
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I n s u f f i c i e n t c a pa c i t y d e l i v e r e d
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P u m p d o e s n o t d e l i ve r l i q u i d
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PROBABLE CAUSES POSSIBLE REMEDIES
B. MECHANICAL TROUBLES
      Misalignment due to pipe strain.
Check the flange connections and eliminate
strains using elastic couplings or a method
permitted.
 Improperly designed foundation.
Check setting of baseplate: tighten, adjust, grout
base as required.
     Shaft bent. Check shaft runouts within acceptable values.
    Rotating part rubbing on stationary part internally.
Check for signs of this and consult Flowserve if
necessary.
      Bearings worn Replace bearings.
   Wearing ring surfaces worn. Replace worn wear ring/surfaces.
   Impeller damaged or eroded. Replace impeller and check reason.
 Leakage under sleeve due to joint failure. Replace joint and check for damage.
   Mechanical seal improperly installed.
Check alignment of faces or damaged parts and
assembly method used.
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Incorrect type of mechanical seal for operating
conditions.
Consult Flowserve
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Shaft running off centre because of worn
bearings or misalignment.
Check misalignment and correct if necessary.
If alignment satisfactory check bearings for
excessive wear.
    Impeller out of balance resulting in vibration. Check and consult Flowserve.
   Abrasive solids in liquid pumped. Check and consult Flowserve.
  Mechanical seal was run dry.
Check mechanical seal condition and source of
dry running and repair.
     
Internal misalignment due to improper repairs
causing impeller to rub. Check method of assembly, possible damage or
state of cleanliness during assembly.
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Excessive thrust caused by a mechanical failure
inside the pump. Check wear condition of impeller, its clearances
and liquid passages.
  Excessive grease in ball bearings. Check method of regreasing.
  Lack of lubrication for bearings.
Check hours run since last change of lubricant,
the schedule and its basis.
  Improper installation of bearings.
Check method of assembly, possible damage or
state of cleanliness during assembly and type of
bearing used.
  Damaged bearings due to contamination.
Check contamination source and replace
damaged bearings.
C. ELECTRICAL TROUBLES
    Wrong direction of rotation. Reverse 2 phases on motor terminal box.
   Motor running too slow. Check motor terminal box connections.