Pentair MULTICUT 35/2 M Tan EX Instructions De Service page 11

Oil check
The oil reservoir is sealed on the outside
with a sealing screw "Öl" (oil). In order
to check the mechanical seal, the oil,
including any residue, must be drained
from the oil reservoir and collected in a
clean measuring container.
• If the oil is contaminated with water
(milky), an oil change must be car-
ried out. Check again after a further
300 operating hours, but at the very
latest after 6 months!
• However, if the oil is contaminated
with both water and pollutants, then
not only the oil must be replaced, but
the mechanical seal as well.
For monitoring the oil reservoir, it is
also possible to retrofit the electrode of
our "DKG" or DKG-Ex" seal leak con-
trol device in place of the "DKG" sealing
screw.
Changing the oil
To ensure operational liability, the first
oil change should be carried out after
300 operating hours, with further oil
changes carried out after every 1000
operating hours.
If the number of operating hours is very
low, an oil change should still be carried
out at least once a year.
If wastewater with strongly abrasive
constituents is being pumped, the oil
changes should be carried out at corre-
spondingly shorter intervals.
Use HLP hydraulic mineral oil, viscosity
class 22 to 46, e.g. Mobil DTE 22, DTE
24, DTE 25, to replace the oil in the oil
reservoir.
The volume of oil required is 520 cm³ for
MultiCut 25/2 to 36/2 and 750 cm³ for
MultiCut 45/2.-
ATTENTION! The oil reservoir may only
be filled with the specified quantity of
oil. Overfilling will result in the pump
being rendered inoperable.
Checking the pump unit
The housing screws for the pump, and
the connecting and fixing screws of the
installation must be checked to ensure
they are fixed securely. They should be
tightened if necessary.
If the pump performance decreases, or
if increasingly loud noises can be heard
during operation, or if the cutting per-
formance decreases (the pump tends to
become blocked), the impeller and cut-
ting system must be checked for wear
by an expert and replaced if necessary.
Replace the impeller
Worn impellers can have sharp
edges.
1. Block the cutting rotor with a piece of
wood and unscrew the central hexa-
gon socket screw
2. Unscrew the four hexagon so-
cket screws on the top of the spi-
ral housing, and take off the spiral
housing.
3. Fit the new impeller with the feather
key onto the shaft, using the same
number of adjusting washers as be-
fore.
4. Measure dimension B on each blade
and note the largest measurement.
5. Measure dimension A in several
places and note the smallest mea-
surement.
6. ATTENTION! The impeller gap A-B
must measure 0,5-0,7 mm.
If the gap is larger or smaller, use
adjusting washers (12x16x0.2) under
the impeller to adjust the gap.
7. Screw the spiral housing and the oil
reservoir/motor back together again.
8. As a final step, put the cutting rotor
back on and adjust the cutting gap.
Checking the cutting clearance
Using a suitable tool, e.g. feeler gauge,
the cutting clearance between the cut-
ting rotor and the cutting plate can be
measured. A cutting clearance of over
0.2 mm must be reduced.
Adjustment of the cutting clearance
1. Block the cutting rotor with a piece of
wood and unscrew the central hexagon
socket screw.
ENGLISH
2. Take off the compression piece, the
cutting rotor and an adjusting washer
and then attach the compression piece
and the cutting rotor again.
3. Block the cutting rotor and tighten
again with the hexagon socket screw
(tightening torque 8 Nm).
4. Check the freedom of movement of
the cutting rotor and the cutting clear-
ance again (max. 0.2 mm).
If the cutting clearance is still too big,
a further adjusting washer must be re-
moved. Steps 1-4 must be repeated.
Cleaning
Worn impellers can have sharp
edges.
To clean the impeller and the spiral
housing first of all remove the com-
pression piece and the cutting rotor as
described above. Then unscrew the 4
hexagon socket screws and remove the
spiral housing.
The impeller and the spiral housing can
now be cleaned. After this fit the indi-
vidual components again and adjust the
cutting clearance.
To clean the pump chamber a flushing
pipe can be fitted as and when required.
To do so, the "Luft" (air) sealing screw
is removed and in its place the flushing
pipe fitted to the pump.
ATTENTION! If the wrong screws are
unscrewed, the oil will run out of the oil
reservoir.
Tightening torque M for A2 screw ma-
A
terials
for M 6 M = 8 Nm
A
for M 8 M = 20 Nm
A
for M 10 M = 40 Nm
A
for M 12 M = 70 Nm
A
for M 16 M = 160 Nm
A
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