Schwing SP 1800, Original Operating Instructions

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3.10 Working operation - Concrete pump SP 1800 / 2800
Arbeitsbetrieb-Betonpumpe-SP-1800-2800-EN.fm - 01.05.00 131
3.10 Working operation - Concrete pump SP 1800 / 2800
3.10.1 General
• Lightly spray the concrete filling hopper with mould oil from the outside before
pumping for the first time. This facilitates subsequent cleaning.
Make sure that no oil enters the hopper (risk of changes to concrete).
Use only rubber-compatible media.
• Switch on the agitator and vibrator.
• Fill a lubrication mixture into the concrete filling hopper.
The lubrication mixture consists of two parts cement, one part sand, and one
part water.
The amount is determined by the length and diameter of the pumping line.
If you have a short pumping line or are pumping ready-mix concrete, the lubri-
cation mixture may consist solely of cement and water.
• Never switch on the concrete pump with an empty filling hopper. Dry running
wears out the pumping piston and kidney seal faster. Fill water into the filling
hopper for maintenance and cleaning work.
• Fill concrete into the filling hopper before the lubrication mixture has been com-
pletely pumped out.
• Never pump at full speed; instead, set the required pumping power after con-
crete starts to exit the end of the pumping line.
VORSICHT!
Caution!
Risk of accidents due to parts or material being ejected!
Intake air is compressed in the pumping line and escapes abruptly at the end of the
line or through the hopper.
Persons in the danger zone may be injured through pulsating of the end hose and
flying parts.
To avoid this, the hopper must be filled up to the agitator shaft with concrete so that
no air is drawn in.
• In case of wait times, especially in hot weather, keep the concrete moving (ag-
itate it) by pumping it back and forth from time to time.
• Spray off the machine occasionally with water during operation to prevent con-
crete from setting.