ENGLISH
7.2 Motor
Increasing bearing noise and undue vibrations indicate a worn bearing. The bearing or
the complete motor then needs replacing.
Exchange of the motor
(Fig. 4, 5):
- Switch off power supply and secure against unauthorized switching.
-
Close isolating valves at both pump ports.
-
Lower the pressure of the pump by opening the air vent plug (pos. 2.1).
Beware of sclading!
In the event of hot liquids,
-
Disconnect wires from motor terminals
-
Unscrew the motor fixing-screws (pos. 4) at motorflange and lift the motor with impel-
ler and shaft seal off pumphousing by means of suitable lifting gear.
-
Assemble the new motor with impeller and shaft seal by means of suitable lifting gear
and secure the motorflange (and adapter-ring for BL-pumps) connection with bolts.
ATTENTION!
Observe screw tightening torque regulations (see 7.3).
-
Rewire power leads to motor terminals.
7.3 Screw tightening torque
Screw Connection
Tightening Torque
Nm ± 10%
Mounting Instructions
Impeller - Shaft
M10
M12
30
60
Pump Housing –
Motorflange
M16
100
tighten the screws equally
crosswise
20
