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Trouble
(F)
Excessive pump flow
rate.
Flow continues after
pump has stopped.
(G)
Liquid
leakage
pump adaptor drain.
(H)
Knocking
sound
gearbox.
(I)
Liquid end noise.
(J)
Overheating of motor.
(K)
Overload.
MP3000PR 001 to 010 Plunger PumpUpdated January 2017
Cause
Pressure difference across
pump less than 20 KPa
Discharge line too long or
diameter too small
from
Loose or worn V-Packings
in
Excessive discharge
pressure
Rhythmic noise of pump
valves
Clogged discharge or
suction valve
Improper voltage
Overload
Inadequate ventilation
Improper Oil
Discharge pressure too
high
Erratic noise of pump
valves
Correction
Increase pressure
difference (ie install back
pressure valve).
Reduce length and/or
increase diameter.
Install accumulator in
discharge line.
Adjust or replace. See
Sec. V-Packings.
Check discharge pressure.
Normal
Clean valve
Adjust voltage to motor
specification.
(Refer to Section K).
Change motor or relocate
Change
Lower to permissible
pressure
1. Clean valves.
2. Increase pressure
difference (ie install
back pressure valve).
Series 3000PR
Page 11
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