EN
UNI 30 E 17261 - 561.228 10 - TROUBLESHOOTING
Cap. 10 - Pag. 1/5
THIS MANUAL IS PROPERTY OF - ANY TOTAL OR PARTIAL REPRODUCTION IS STRICTLY FORBIDDEN
10.1 INCORRECT MIXTURE
• Gun blockage.
- The mortar does not escape from the gun
A mixture that is too thin, a crust of hardened material, a stone, a deflector with passage too reduced for the material used can
cause the gun to block.
- Material does not escape from the gun and the mortar pipe pressure manometer indicates a pressure that exceeds normal
working pressure.
Stop the machine taking the master switch to the "0" position, discharge the pressure in the material flow pipes by turning the
by-pass activation lever to a vertical position (FIG.27-REF.6); wait for the pressure on the manometer (FIG.27-REF.7) to drop
to zero.
Before loosening a material flow pipe joint or disconnecting the gun, make sure that the pressure manometer indicates a
pressure of 0 (zero) bar and that there is no residual pressure in the pipes.
The operator must have been specifically trained to perform this operation.
In particular, before opening a joint make sure there is no residual pressure inside the piping and that no one is standing
nearby.
This operation is potentially dangerous and should always be performed with caution and by qualified staff only.
Disassemble the deflector and if necessary the gun and remove the cause of the blockage.
- Before re-mounting the deflector or the gun, make sure that the nozzle is free (clean it if necessary using wire).
Re-start the machine to check that the material escapes freely from the piping.
• Mortar pipe blocked.
An incorrect mixture or prolonged standstill can cause the material flow pipe to become blocked.
- Material does not escape from the gun and the mortar pipe pressure manometer indicates a pressure that exceeds normal
working pressure 20÷25.
bar.
Close the air cock to the gun: the machine stops;
Discharge the pressure in the material flow pipes by turning the by-pass activation lever to the vertical position (FIG.27-REF.6);
wait for the pressure indicated on the manometer to drop to zero.
Before loosening a material flow pipe joint or disconnecting the gun, make sure that the pressure manometer
indicates a pressure of 0 (zero) bar and that there is no residual pressure in the pipes.
The operator must have been specifically trained to perform this operation.
In particular, before opening a joint make sure there is no residual pressure inside the piping and that no one is
standing nearby.
This operation is potentially dangerous and should always be performed with caution and by qualified staff only.
Identify where the material flow line is blocked: the pipe is hard and rigid in this point;
Disconnect the blocked pipe, strike it with a mallet in correspondence with the blockage in order to break the "tap" that has
formed and to make the hardened material escape.
Start the machine for a few seconds and make sure that the pipe has been freed from the "tap": the material escapes regularly.
Pour the slurry into the pipe downstream from that where the blockage occurred, re-connect the piping line and re-start.
• Valves blocked.
A mixture that is too thin can cause blocking in the valves
- Material does not escape from the piping and the pressure manometer indicates a pressure of 0 bar.
Stop the machine taking the master switch to the "0" position (FIG.27-REF.2), discharge the pressure in the material flow pipes
by turning the by-pass activation lever to a vertical position (FIG.27-REF.6); wait for the pressure on the manometer (FIG.27-
REF.7) to drop to zero.
Open the stands (FIG.54-REF.1) with the relevant key (FIG.54-REF.2) supplied.
Disassemble the inspection caps (FIG.55-REF.1) of the valves and remove the two rubber balls (FIG.55-REF.2) that are found
inside and wash the intake valve body (FIG.55-REF.4) and the flow valve body (FIG.54-REF.4) well.
Remove the discharge cap (FIG.55-REF.5) of the intake pipe.
Modify the mixture according to that indicated in paragraph 7.2.
Empty the hopper and use a jet of water to remove all material.
Re-mount everything and make the correct mixture and re-start.
• Belt loose
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