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Beschikbare talen
Beschikbare talen
If water is still present in the operating fluid, a seal may be
defective. Please consult your manufacturer. When using
sealing chamber or leakage monitoring, in the event of a
defective seal, the display will light up again within the
next 4 weeks after the exchange.
Generally, the following applies when changing op-
erating fluid: Turn off machine, allow it to cool, dis-
connect from the power supply (to be carried out by
a specialist!), clean and place on a solid surface in a
vertical position. Warm or hot operating fluid may be
under pressure. The emergent operating fluid may
cause burns. Therefore, allow the machine to cool to
ambient temperature first! Secure against tipping over
and/or sliding!
6.4. Seal chamber
Since there is a large number of variants and versions of
these pumps, the exact location of the locking screws var-
ies depending on the pump part used.
•
Carefully and slowly unscrew the sealing chamber's
filler screw.
Attention: The operating fluid may be under pressure!
•
Unscrew drain screw. Drain the operating fluid and
collect in a suitable container. Clean the drain screw,
equip with a new seal ring and tighten again. To drain
fully, the machine must be tipped slightly to the side.
Ensure that the machine cannot tip over and/or slide
away!
•
Place machine horizontally and fill with operating
fluid. Observe the prescribed operating fluid and fill
quantities.
•
Clean the filler screw, equip with a new seal ring and
tighten again.
36 | EngliSH
7. Repairs
7.1. General
The following repairs can be carried out on this machine:
•
Changing the impeller and pump unit
•
Changing wear rings
When carrying out repair work, the following information
should always be noted:
•
Round sealing rings as well as existing seals should
always be replaced.
•
Screw fixings such as spring washers should always
be replaced.
•
The correct torques must be observed.
In general, the following applies to repairs:
Switch off the machine, disconnect it from the mains
(have this done by an electrician), clean it and place
it on a solid base in a horizontal position. Secure it
from falling over and/or slipping.
If not otherwise stated, the torque values of the
below tables should be used. Values stated are for clean,
lubricated screws. Fixing torque [Nm] for screws A2/A4
(Coefficient of friction = 0,2)
A2/A4,
Hardeness class 70
DIN912/DIN933
M6
7 Nm
M8
17 Nm
M10
33 Nm
M12
57 Nm
M16
140 Nm
M20
273 Nm
7.2. Changing the impeller and pump unit
Changing the impeller and the pump unit.
•
Loosen and remove the screws on the sealing
housing.
•
Secure and remove the pump housing from the
sealing housing with suitable equipment, e.g.
hoisting gear. Place on a secure base.
•
Fasten the impeller with suitable equipment, loosen
and remove the impeller fastening (cylindrical screw
with socket hex).
Pay attention to the locking screw!
•
Remove the impeller from the shaft using a suitable
extractor.
•
Cleaning the shaft
•
Attach a new impeller to the shaft.
Make sure that the sliding surfaces do not become
damaged!
A2/A4,
Hardeness class 80
DIN912/DIN933
11,8 Nm
28,7 Nm
58 Nm
100 Nm
245 Nm
494 Nm
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