ALKOTA 4142 - Page 33

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11. Low Pressure
12. Excessive vibration
13. Scored plungers
14. Pitted plungers
15. Cavitations
16.Loud knocking
in pump
17. Short bearing life
18. Short seal life
19.Erratic pressure:
pump runs rough
A. Dirty or worn check valves
B. Worn packing
A. Dirty or worn check valves
A. Abrasive material in fluid being
pumped.
A. Cavitations
A. High inlet fluid temperature
B. Low inlet pressure.
A. Loose connecting rod screws.
B. Worn connecting rod.
C. Worn bearings.
D. Loose plunger bushing screw.
A. Excessive belt tension.
B. Misalignments between pump and
motor.
C. Oil has not been changed on
regular basis.
A. Damaged plunger bushing
B. Worn connecting rod.
C. Excess pressure beyond the
pump’s maximum rating.
D. High water temperature.
A. Dirty or worn check valves.
B. Foreign particles in valve
assemblies.
C. High inlet water temperature.
A. Clean/Replace check valves
B. Remove and replace packing
A. See “Dirty or worn check valves”
A. Install proper filtration on pump inlet plumbing
A. Decrease water inlet temperature and/or water
inlet pressure.
A. Lower inlet fluid temperature
B. Raise inlet fluid pressure.
A. Tighten connecting rod screws per PUMP
SPECIFICATIONS.
B. Replace connecting rod per PUMP
MAINTENANCE.
C. Replace bearings per PUMP MAINTENANCE.
D. Tighten plunger screw per PUMP
SPECIFICATIONS.
A. See BELT TENSION in MACHINE MAINTENANCE.
B. Re-align pump and motor.
C. Check oil type and change intervals per PUMP
SPECIFICATIONS.
A. Replace plunger bushing.
B. Replace connecting rod.
C. Match pressure stated in PUMP
SPECIFICATIONS.
D. Lower water temperature stated in PUMP
SPECIFICATIONS.
A. Clean/Replace check valves.
B. Clean/Replace check valves.
C. See temperature in PUMP SPECIFICATIONS.
Supersedes 08-27-04 Z08-00195 05-26-06 Z08- 00195
REMEDYPOSSIBLE CAUSE
TROUBLE
PUMP TROUBLESHOOTING CONT.