Repairs; Instructions On Using Screw Locking Devices - Wilo Rexa CUT GI Instrucciones De Instalación Y Funcionamiento

placed with original parts. This will ensure correct opera-
tion.
The general overhaul is performed by the manufacturer
or an authorised service centre.
9.6

Repairs

WARNING
Attached macerator: sharp edges on the cut-
ting 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 fol-
lowing protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Closed safety goggles
The following preconditions must be met prior to start-
ing repair work:
▪ Pump cooled down to the ambient temperature.
▪ Pump is switched voltage-free and secured against be-
ing 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!
9.6.1

Instructions on using screw locking devices

A screw locking device can be used on the screws. Screw
locking is done at the factory using two different meth-
ods:
▪ Thread-locking fluid
▪ Mechanical screw locking device
Always re-apply the screw locking device!
Thread-locking fluid
Medium-strength thread-locking fluid (e.g. Loctite 243)
is used for the liquid screw locking compound. This
threadlocker can be loosened with increased force. If the
thread-locking fluid cannot be loosened, then the com-
Installation and operating instructions Wilo-Rexa CUT GI
Maintenance and repair
9.6.2
9.6.3
Fig. 10: Readjusting the cutting gap
1...4 Grub screw
5
6
7
8
pound must be heated to approx. 300 °C (572 °F). Clean
the components thoroughly after dismantling.
Mechanical screw locking device
The mechanical screw locking device consists of two
Nord-Lock wedge lock washers. The screw connection is
secured by the clamping force. The Nord-Lock screw
locking device must only be used on bolts with strength
class 10.9 which have been coated with Geomet. The use
of stainless screws is prohibited!
Which repair work may be carried out
▪ Readjusting the cutting gap.
Readjusting the macerator
The gap between cutting plate and blade is approx.
0.1 mm (0.004 in). If the gap becomes too great, then
cutting performance is impaired and clogging will in-
crease. In this case, readjust the gap.
Necessary tools
▪ Torque wrench with size 4 Allen wrench insert
▪ Size 5 Allen wrench
▪ Size 4 Allen wrench
Work steps
1
5
6
4
Cylinder-head screw
Cutting plate
Rotating blade
Pressure connection
en
5 3
7
5
2
8
111