Contaminated Pumps - Grundfos AP51 Serie Montage- Und Betriebsanleitung

For long and trouble-free operation of the pump the
following points should be checked regularly:
• Power consumption
• Oil level and oil condition
The oil becomes greyish white like milk if it
contains water. This may be the result of a
defective shaft seal. The oil should be replaced
after 3000 hours of operation.
Use Shell Ondina 15 oil or similar type.
Note: Used oil must be disposed of in
accordance with local regulations.
The following table states how much oil the
AP pumps must have in the stator housing and
the oil chamber:
Pump type
AP51.65.07
AP51.65.09
AP51.65.12
AP51.65.13
AP51.65.14
AP51.65.14V
AP51.65.15
AP51.65.15V
AP51.65.17
AP51.65.22
AP51.65.22.3(Ex)
AP51.65.23
AP51.65.23V
AP51.65.34
AP51.65.34V
AP51.65.35
AP51.65.35V
AP51.65.36V
Ex = explosion-proof.
• Cable entry
Make sure that the cable entry is watertight and
that the cables are not bent sharply and/or
pinched.
• Pump parts
Check the impeller, pump housing, neck ring, etc.
for possible wear. Replace defective parts.
• Ball bearings
Check the shaft for noisy or heavy operation
(turn the shaft by hand). Replace defective ball
bearings.
A general overhaul of the pump is usually
required in case of defective ball bearings or poor
motor function. This work must be carried out by
the manufacturer or a competent workshop.
Quantity of oil in:
Stator Oil
housing chamber
0.01 l
0.01 l
0.01 l
0.01 l
0.01 l
0.01 l
0.01 l
0.01 l
1.20 l
0.60 l 1.20 l
1.20 l
0.60 l 1.20 l
0.60 l 1.20 l
0.60 l 1.20 l
0.60 l 1.20 l
0.60 l 1.20 l
0.60 l 1.20 l
0.60 l 1.20 l

7.1 Contaminated pumps

Note: If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be
classified as contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid, etc. before the pump is returned for
service. Otherwise Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for
liquids which are injurious to health or toxic.
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