28
29
Material hose plugged
An incorrect mix or delays in application can result in a
plugged material delivery hose: no material comes out the
spray gun and the mortar hose pressure gauge shows a
higher than normal working pressure.
“Normal working pressure” depends on the material and
the hoses used: it is advisable to check this pressure value
regularly on the mortar hose pressure gauge so that any
abnormality may be promptly identified.
Stop the mortar pump by
pressing the start/stop button
I/0 (32)
.
Relieve the pressure in the
material delivery hoses by
making the pump turn in the
reverse direction for a few
seconds: open the gun air
control valve
(14)
and reverse
the pump direction of rotation
by means of the relative
command
(36)
.
Try to restart.
Keep the working pressure under control and immediately
stop the machine if the pressure exceeds the normal value,
because this indicates that there could still be a plug.
Close the gun air control valve
(14)
and relieve the pressure
in the material delivery hoses by making the pump turn in
the reverse direction
(36)
for a few seconds.
6 - TROUBLESHOOTING
Always relieve the pressure in the hoses by
making the pump turn in the reverse direction
for a few seconds (5 ÷ 10), before disconnecting them.
The pressure gauge indicating the mortar hose pressure
should show a pressure of 0 bar.
The operator or nozzleman should have been
specifically trained to carry out this operation.
Before opening a coupling in particular, ensure that there
is no residual pressure in the hoses and that no other
persons are in the vicinity.
This potentially hazardous operation should always be
carried out by an expert person exercising the utmost
caution.
Stop the pump.
Identify where the material delivery hose line is plugged:
the hose is hard and rigid in this part.
The most critical points are around the couplings.
Disconnect the plugged
hose, hit it with a hammer
at the edge of the blockage
in order to break the plug
that has formed and allow
the hardened material to
come out.
Start the pump for a few moments and ensure that the
hose is free of the plug: the material should flow out
freely.
Pour slurry into the hose downstream of the one which
was plugged, reconnect the hose line and restart.
If the material contained in the hopper cannot be pumped,
the hopper should be emptied.
Stop the mortar pump by pressing the start/stop button
I/0 (32)
, open the hopper grid and use a trowel to empty
the hopper
Open the hopper discharge hatch and use a water jet to
flush out all the material. Close the hatch, replace and
fix the hopper protective grid, make a correct mix and
restart.
6.1 - NO MATERIAL COMES OUT THE SPRAY GUN
32
14
36
35
Summary of Contents for POLI T
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