Flowserve APKD - Manual (Page 45)

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13
Page 45 of 55 flowserve.com
FAULT SYMPTOM
P u m p o v e r h e a t s a n d s e i z e s
  P u m p w i ll n ot r u n
  P u m p vi b r a t e s o r i s n o i sy
  M e c h a n i c al s e a l h a s s h or t l i f e
  M e c h a n i c al s e a l le a k s ex c e s s i ve l y
  P u m p r e q u i re s e x c es s i ve p ow e r
  M o t o r O ve r l o a d e d
  I n s u f f i c i e n t p r e s s u r e d eve l o p e d
  I n s u f f i c i e n t c a pa c i t y d e l i ve r e d
  P u m p r u n s bu t d o e s n o t d e l i ve r l i q u i d
  POSSIBLE CAUSES
POSSIBLE REMEDIES

Leakage under sleeve due to joint
failure.
Replace joint and check for damage.
 
Shaft sleeve worn, scored, or running
off center.
Check and renew defective parts.
   Mechanical seal improperly installed. Check alignment of faces/damaged parts/assembly
   Incorrect type of mechanical seal. Consult Flowserve.
   
Shaft running off center 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. Consult Flowserve for problem resolution
ideas.    
Solids/Abrasive particles in liquid
pumped.
 
Internal misalignment of parts
preventing seal ring and seat from
mating properly.
  Mechanical seal was run dry. Check mechanical seal/flush supply/pump and repair.
  
Internal misalignment due to improper
repairs causing impeller to rub.
Check method of assembly, possible damage or state
of cleanliness during assembly. Check and consult
Flowserve, if necessary.
  
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 re-greasing.
  Lack of lubrication for bearings.
Check hours run since last change of lubricant, the
schedule and its basis.
 
Improper installation of bearings
(damage during assembly, incorrect
assembly, wrong type of bearing etc). Check method of assembly, possible damage or state
of cleanliness during assembly and type of bearing
used. Remedy and consult Flowserve, if necessary.
 
Damaged bearings due to
contamination.
Check contamination source and replace bearings.
C. MOTOR/ELECTRICAL
PROBLEMS
     Wrong direction of rotation. Reverse 2 phases at motor terminal box.
 Motor Protector open.
Check nameplate for voltage and current rating.
Replace faulty motor protectors.

Line voltage not correct/faulty control
box/wiring/low voltage.
Check wiring diagram.

Blown fuse/breaker open/dead
motor/short or loose connection.
Check/repair or replace fuses/breakers.
  Motor running on 2 phases only. Check supply and fuses.
   Motor running too slow. Check motor terminal box connections and voltage.