Turbosol GIOTTO MONO, Use And Maintenance Manual

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TROUBLESHOOTING
10
561379 - IS16/02 - EN
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10 - TROUBLESHOOTING
10.1 MATERIAL DOES NOT COME OUT OF THE GUN
The operator must be specifically trained to perform the following operations. In particular, before opening
a coupling, check the delivery flange pressure gauge to make sure there is no residual pressure in the
hoses and ensure there are no other people nearby. This potentially dangerous operation must always be
carried out with the utmost caution, by an experienced person.
The "normal operating pressure" displayed on the delivery flange pressure gauge depends on the quality
and consistency of the material and the length of the hoses used: it is useful to regularly check this
pressure value to readily detect any anomalies. "Normal operating pressure" is a pressure between 15 and
20 bar (with 15 m hose), with instantaneous peaks at about 25 bar. A constant operating pressure above 20
bar or below 10 bar is abnormal.
A) Clogged material hose
An excessively prolonged stop may clog the material delivery hose: material does not come out from the gun and the mortar
hose pressure gauge indicates a higher pressure than the normal operating pressure.
In this case:
- Depressurise the hose as described in paragraph 7.8.
- Turn the machine off.
- Check that the pressure indicated by the pressure gauge on the delivery flange is zero.
- Check that the material delivery hose is not hard and stiff anywhere along its length, then disconnect it to release clogging.
- Find where the material delivery line is clogged: the hose will be hard and stiff. Normally, the critical points are the couplings.
- Disconnect the clogged hose.
- With a hammer, tap the stiff part of the hose to break up the obstruction (FIG.40)
- Make the hardened material come out.
- Start the pump for a few seconds and make sure the obstruction has been removed from the hose: the material must come
out normally.
- Reconnect the hose line and restart.
FIG.40
B) Gun clogging
An incorrect mixture, an obstruction (hardened material) or a deflector with a hole too small in relation to the used material, can
clog the gun.
- Depressurise the hose pressure as described in paragraph 7.8.
- Turn the machine off.
- Disassemble the deflector and, if necessary, the gun.
- Remove the clogging.
- Before reassembling the deflector or the gun, make sure the nozzle is clear (clean it if necessary) and the material freely
comes out of the hose.
C) Worn pump