en
Maintenance and repair
36
WILO SE 2021-05
WARNING
Scalding from hot operating fluids!
Hot operating fluids can also spray out when pressure is released. This can result in
scalding! To avoid injuries, the following instructions must be observed:
• Allow the motor to cool down to the ambient temperature before opening the
screw plugs.
• Wear closed safety goggles or face protection and gloves.
9.5.7.1
Oil change: sealing, gear and pre-
chamber
1
2
3
4
5
6
Fig. 12: Oil change
1
Pre-chamber filler hole
2
Gear chamber filler hole
3
Sealing chamber filler hole
4
Pre-chamber drain hole
5
Gear chamber drain hole
6
Sealing chamber drain hole
‡
Mixer is
not
installed.
‡
Mixer is
not
connected to the mains.
‡
Wear protective equipment!
1. Position the mixer horizontally on a firm surface.
WARNING! Risk of hands being crushed. Make sure the mixer cannot fall over or
slip out of position!
CAUTION! Do not place the mixer on the propeller! Always place the mixer on a
platform.
2. Position a suitable tank to collect the operating fluid.
3. Unscrew the screw plug of the filler hole:
1 = pre-chamber
2 = gear chamber
3 = sealing chamber
4. Unscrew the drain hole screw plug and drain operating fluid:
4 = pre-chamber
5 = gear chamber
6 = sealing chamber
NOTICE! Vacuum the oil or rinse the sealing chamber to fully drain the system.
5. Check the operating fluid: Notify customer service if the operating fluid contains
metal swarf!
6. Dispose of operating fluid in accordance with local regulations!
