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

5. Measure dimension B on each blade and note the largest
measurement.
6. Measure dimension A in several places and note the smal-
lest measurement.
7. Notice! 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.
8. Screw the spiral housing and the oil reservoir/motor back
together again.
9. 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 cutting rotor and the cutting plate can be meas-
ured. 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.
2. Remove the compression piece and screw the extraction tool
(code no. JP50325) into the thread of the cutting rotor. Tighten-
ing the inner screw pulls the cutting rotor off the pump shaft.
3. Remove the cutting rotor and one adjusting washer; remove
the extraction tool and then reinstall the compression piece and
cutting rotor.
4. Block the cutting rotor and tighten again with the hexagon
socket screw (tightening torque 8 Nm).
5. Check the freedom of movement of the cutting rotor and the
cutting clearance again (max. 0.2 mm).
If the cutting clearance is still too big, a further adjusting
washer must be removed. Steps 1-4 must be repeated.
Cleaning
CAUTION!
Worn impellers can have sharp edges.
To clean the impeller and the spiral housing first of all remove
the compression 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 individual 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 remo-
ved and in its place the flushing pipe fitted to the pump.
NOTICE! If the wrong screws are unscrewed, the oil will run out
of the oil reservoir.
Tightening torque M for A2 screw materials
A
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
WHAT TO DO IN THE EVENT OF ANY
PROBLEMS
Pump does not work
• Check mains current (do not use a pin gauge)
• Fuse faulty = may be too weak (please refer to Electrical
Connection)
• Mains supply cable damaged = repair to be carried out by
manufacturer only
Pump runs but does not pump
• Empty pressure pipe or hose to allow the non-return valve to
open and let the air escape from the spiral housing.
• Ventilate the pump housing by unscrewing the "Luft" (air)
sealing screw.
Cutting system blocked
• Check the cutting system and readjust or replace as neces-
sary.
Impeller blocked
• Clean spiral housing and impeller.
Decreased pumping performance
• The impeller is worn out = replace it
• Wrong direction of rotation = change 2 phases of the power
supply
ENGLISH
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