Mixing pump G 4 X Super / G 4 X XL / Part 2 Overview, operation and service
Operation
Fault
Possible cause
Troubleshooting
Rectification by
Rotor too deep in pressure
flange
Replace pressure flange
Service technician
No original PFT spare parts
Use original PFT spare parts
Service technician
Poor mixing in mixing tube
Add more water
Operator
Mortar clogs and narrows mixing
tube inlet
Add more water or clean/replace
mixing shaft
Operator
Mixing shaft defective
Replace mixing shaft
Operator
Material in mixing tube has
become wet
Empty mixing shaft, dry and
begin again
Operator
No mortar flow
(air bubbles)
Driving dog defective
Replace driving dog
Service technician
Backpressure in mortar hose
higher than pump pressure
Retighten or replace stator
Service technician
Rotor or stator worn
Replace rotor or stator
Service technician
During opera-
tion water rises
in the mixing
tube
Hose blockage due to mortar
being too thick (high pressure
due to low water factor)
Remedy hose blockage,
increase water factor
Service technician
Overload due to the pump
getting blocked with dry material
Allow the machine to run back-
wards, otherwise remove pump
and clean it
Service technician
Overload due to low water
volume
Increase water feed on start-up
Operator
Motor protection switch pump
motor triggered
Switch the motor protection
switch on again
Service technician
Red control
lamp, fault
lights up
Overload due to compacted
material in mixing tube
Clean mixing tube
Switch the motor protection
switch on again
Service technician
5.14.5
Hose blockages
Indications
Blockages can occur in the pressure flange or in the mortar hoses.
Indications are:
Rapidly increasing pressure head
Blockage of pump
Running difficulties or blockage of the pump motor
Expansion and turning of the mortar hose
No material leakage at the hose ends
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