Ebsray R75, Installation, Operation & Maintenance Instructions Manual, Page: 14 / 14

Publication No.: 2753-20
14
SECTION 9
– TROUBLESHOOTING
Symptom
Possible cause Symptom Possible cause
No Liquid
Delivery

No power to drive shaft

Coupling damaged or disengaged

Foreign matter in the pump

Ball Bearings seized

Inlet/Discharge valves closed

No liquid in supply tank

Incorrect direction of rotation

Strainer blocked

High static discharge pressure

Inadequate NPSHA

Pump vapour lock
Reduced
Output

Incorrect driver speed

Faulty driver

Discharge piping restricted

Strainer blocked

Inlet piping too small or too long

Foreign object in suction line

External bypass pressure setting too low

End of service life or adverse pumping
conditions
Excessive
Power
Consumption

Foreign matter in discharge line

Collapsed or kinked discharge hose

Pressure, Viscosity, Temperature or
Speed not as per design conditions

Foreign matter jamming parts

Pump out of alignment with driver

Parts worn

End of service life or adverse
pumping conditions
Excessive
Noise

Foreign matter jamming parts

Parts worn

End of service life or adverse pumping
conditions

Incorrect driver speed

Faulty or incorrect size driver
Leakage
from Pump

Seals incorrectly installed

Excessive dry running or pump

O-rings nicked, cut or twisted

O-rings not compatible with liquid

Worn or damaged shaft in seal zone

Misalignment causing excessive
shaft distortion

Excess system pressure

O-ring failure

Fasteners not tightened to specified
torque.

Thermal expansion of product when
locked between valves either side of
pump

Excessive static pressure

Seal faces cracked, scratched, pitted
or dirty
Visit www.ebsraypumps.com.au for more information on any Ebsray products
156 South Creek Rd, Cromer 2099, Australia
Telephone: (+612) 9905 0234 | Fax: (+612) 9938 3825
Email: sy.sales@psgdover.com