Instruction Manual
Page 36 of 40
Issue: 2.1
N:\Engineering\Manuals\Pump Unit E2-30 & 40 R2.1.doc
Fault Finding – Section 6.4
Symptom
Possible Cause
Remedy
Mechanics
Gearbox Output shaft does not
rotate, even though the motor
is running.
Drive between shafts in the gear
unit interrupted
Return the unit for repair and replace
gearbox
Gearbox Oil leaking
•
from the gear unit cover
•
from the motor flange
•
from the gear unit flange
•
from the output oil seal
a) Defective gasket on gear unit
cover.
b) Defective gasket.
c) Gear unit not ventilated.
a) Retighten screws on gear unit
cover.
b) Return gearbox
c) Check vent is clean/fitted and not
the transportation plug
Gearbox Oil leaking from
ventilator
a) Unit Overfilled with oil.
Check and correct the oil level
Cam Followers bearing
generating heat / noise
Bearing needs lubrication
Grease bearing or replace if damage
is too great
Carriage does not maintain
contact with cam
a) Spring tension insufficient
b) Fluid seal friction or piston
movement prevented
Check and replace springs
Check fluid section
Noisy Changeover
Coupling spider worn
Replace green spider coupling
Fluid Section
Pump will not ‘Prime’
a) Air entering the suction
hose/manifold
b) Worn piston seals
c) Ball checks not seating
correctly
a) Check o-rings and hose
connections
b) Replace piston seals
c) Inspect, clean/replace balls/seats
Pump will not run
a) No power
b) Inverter Unit or safety
interlocks ‘tripped’
a) Check electrical supply
b) Check inverter and fault conditions
Pump runs but lack of pressure a) Worn piston seals
b) Ball checks not seating
correctly
a) Replace piston seals
b) Inspect, clean/replace balls/seats
Paint leaking from inside cover Bellows seal failure
Replace bellows seal
Check Piston seal, replace as
necessary
Excessive Pressure Pulsation
a) Ball checks not seating
correctly
b) Main shaft bearings worn
c) Cam follower worn
d) Cam direction incorrect
a) Inspect, clean/replace balls/seats
b) Replace bearings
c) Replace bearings
d) Ensure cam direction is clockwise