Inspection; Replacing The Grinder System - Grundfos SEG AUTOADAPT Montage- Und Betriebsanleitung

11.3 Inspection

Warning
Except for service on the pump parts, all
other service work must be carried out by
Grundfos or a service workshop
authorised by Grundfos and approved for
servicing explosion-proof products.
Pumps running normal operation should be
inspected every 3000 operating hours or at least
once a year. If the dry-solids content of the pumped
liquid is very high or the pumped liquid is very sandy,
check the pump at shorter intervals.
Check the following points:
• Power consumption
See section 4.1 Nameplate.
• Motor oil level and oil condition
When the pump is new or after replacement of
the shaft seal, check the oil level after one week
of operation.
Use Shell Ondina X420 oil or similar type. See
section 11.8 Changing the
Used oil must be disposed of in
Note
accordance with local regulations.
The table below states the quantity of oil in the oil
chamber of SEG AUTO
ADAPT
Pump type
SEG AUTO up to 1.5 kW
ADAPT
SEG AUTO 2.6 to 4.0 kW
ADAPT
• Sensors
For cleaning of sensors, see section
11.6 Cleaning the sensors.
• Cable entry
Make sure that the cable entry is watertight and
that the cables are not sharply bent or pinched.
See section 11.9 Service
• Pump parts
Check the impeller, pump housing, etc. for
possible wear. Replace defective parts.
See section 11.9 Service
• Ball bearings
Check the shaft for noisy or heavy operation by
turning 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
Grundfos or an authorised service workshop.
• Grinder system/parts
In case of frequent choke-ups, check the grinder
system for visible wear. When worn, the edges of
the grinding parts are round and worn. Compare
with a new grinder system.
18
oil.
pumps:
Quantity of oil
in oil chamber
[l]
0.17
0.42
kits.
kits.

11.4 Replacing the grinder system

Warning
Before starting work on the pump, make
sure that the fuses have been removed or
the mains switch has been switched off.
Make sure that the power supply cannot
be accidentally switched on.
All rotating parts must have stopped
moving.
Warning
Beware of the sharp edges on the impeller,
grinder head and grinder ring.
Warning
During service the painted surface may be
Caution
damaged. Remember to restore the
painted surface by applying new paint.
For position numbers, see page 560.
Dismantling
1. Loosen screw (pos. 188a) in one of the pump
feet.
2. Loosen grinder ring (pos. 44), and open the
bayonet socket by knocking or turning the grinder
ring 15 to 20 ° clockwise. See fig. 13.
Fig. 13 Removing the grinder ring
3. Gently prise grinder ring (pos. 44) out of the
pump housing with a screwdriver.
Warning
Caution
Make sure that the grinder ring does not
get stuck against the grinder head.
4. Insert a punch into the hole in the pump housing
to hold the impeller.
5. Remove screw (pos. 188a) in the shaft end and
locking ring (pos. 66).
6. Remove grinder head (pos. 45).