Maintenance and repair
en
Installation and operating instructions Wilo-EMU FA + FK 17.1, FK 202, FK 34, FK 42
35
9.6.7
Oil change in the motor compart-
ment
WARNING
Operating fluid under high pressure!
A pressure of
several bar can build up
in the motor! This pressure escapes when the
screw plugs are
opened
. If screw plugs are opened without due caution, they can be
ejected at high speed! To avoid injuries, observe the following instructions:
• Adhere to the prescribed sequence of work steps.
• Unscrew the screw plugs slowly, but never unscrew them completely. As soon
as the pressure escapes (audible whistling or hissing of air), stop turning the
screw plug any further!
• When the pressure has completely dissipated, fully unscrew the screw plugs.
• Wear closed safety goggles.
WARNING
Scalding due to hot operating fluids!
Hot operating fluids can also spray out when the pressure is escaping. This can result
in scalding! To avoid injuries, the following instructions must be observed:
• Allow the pump to cool down to the ambient temperature then open the screw
plugs.
• Wear closed safety goggles or face protection and gloves.
Motor FK 17.1
+/-
Fig. 11:
Motor compartment: Oil change
+/-
Fill/drain the oil in the motor compartment
‡
Protective equipment has been put on!
‡
Pump has been dismantled and cleaned (decontaminated if required).
1. Place the pump upright on a firm surface.
WARNING! Risk of hands being crushed.
Ensure that the pump cannot fall over or slip away!
2. Place a suitable tank to collect the operating fluid.
3. Unscrew the screw plug slowly, but do not unscrew it completely.
WARN-
ING! Overpressure in the motor! Stop turning the screw plug further if hissing
or whistling is audible! Wait until the pressure has completely dissipated.
4. After the pressure has dissipated, fully unscrew the screw plug and drain the oper-
ating fluid.
5. Check the operating fluid: Notify customer service if an operating fluid contains
metal chips!
6. Pour the new operating fluid in through the opening.
⇒ Comply with the specifications for operating fluid locations and quantity!
7. Clean the screw plug, replace the seal ring and screw it back in.
Max. tightening
torque: 8 Nm!
