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Fig. 10: Sealing chamber: Oil change
9.5.7
General overhaul
9.6
Repairs
Installation and operating instructions Wilo-Rexa CUT GE
Maintenance and repair
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.
+/-
Screw plug sealing chamber
‡
Protective equipment has been put on!
‡
Pump has been dismantled and cleaned (decontaminated if required).
1. Position the pump horizontally on a firm surface. The screw plug points upwards.
WARNING! Risk of hands being crushed. Ensure that the pump cannot fall over
or slip away!
2. 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.
+/-
3. After the pressure has dissipated, fully unscrew the screw plug.
4. Place a suitable tank to collect the operating fluid.
5. Drain the operating fluid: Rotate the pump until the opening points downwards.
6. Check the operating fluid: Notify customer service if an operating fluid contains
metal chips!
7. Pour in operating fluid: Rotate the pump until the opening points upwards. Fill-in
the operating fluid into the opening.
⇒ Comply with the specifications for operating fluid locations and quantity!
8. Clean the screw plug, replace the seal ring and screw it back in. Max. tightening
torque: 8 Nm (5.9 ft lb)!
During the general overhaul, the motor bearings, shaft sealings, O-rings and power
supply cables are checked for wear and damage. Damaged components are replaced
with original parts. This will ensure correct operation.
The general overhaul is performed by the manufacturer or an authorised service centre.
WARNING
Attached macerator: sharp edges on the cutting plate and rotating blade!
The macerator can cause amputation of limbs! Wear safety gloves to protect against
cuts and never reach into the macerator!
WARNING
Hand, foot or eye injuries due to the absence of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Closed safety goggles
The following preconditions must be met prior to starting repair work:
▪ Pump cooled down to the ambient temperature.
▪ Pump is switched voltage-free and secured against being activated inadvertently.
▪ Pump cleaned thoroughly and disinfected (if required).
For repair work the following generally applies:
en
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