Repairs - Wilo FKT 50.1 Series Installation And Operating Instructions Manual

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Fig. 21: Grease roller bearings FKT 63.2
9.6.12 General overhaul
9.7

Repairs

9.7.1 Instructions on using screw lock-
ing devices
204
Maintenance and repair
Motor FKT 63.2
+ Grease nipple for greasing (grease quantity: 200 g/7 oz)
‡
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. 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. The grease nipple for lubricating the bearings is located behind the screw plug.
5. Use a grease gun to inject the new grease into the grease nipple.
6. 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
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is danger of limbs be-
ing severed! Protective gloves must be worn to protect from cuts.
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:
▪ Wipe up spillage quantities of fluid and operating fluid immediately!
▪ Always replace O-rings, gaskets and screw locking devices!
▪ Observe the tightening torques in the appendix!
▪ Never use force when carrying out this work!
A screw locking device can be used on the screws. Screw locking is done at the factory
using two different methods:
▪ Thread-locking fluid
▪ Mechanical screw locking device
Always re-apply the screw locking device!
WILO SE 2019-01