Putzmeister 210109379, Operating Instructions Manual

Page: 250 / 434

Pumpingoperations
628
AP07_042_9712EN
There are a number of options for cleaning a delivery line. Some of
the factors affecting which cleaning method you use include how the
concrete pump has been used and what equipment you have avail
able.
Overleaf you will find a summary showing which cleaning method
isrecommended for the delivery lines listed. The symbols used in
the summary are explained below. The cleaning procedures are
described in the following sections.
The delivery line is connected to the concrete pump.
The leavings are pumped by the concrete pump out of
the hopper and onwards to the site of concrete place
ment. Cleaning is from the hopper onwards to the site
of concrete placement.
The delivery line is connected to the concrete pump.
The leavings are sucked back by the concrete pump
from the site of concrete placement into the hopper.
Cleaning is backwards from the site of concrete place
ment to the hopper.
The delivery line has been disconnected from the con
crete pump. The leavings are forced forwards from the
start of the delivery line to the site of concrete place
ment using an external force (compressed air or water
under pressure). Cleaning is from the start of the deliv
ery line to the site of concrete placement.
The delivery line has been disconnected from the con
crete pump. The leavings are forced backwards from
the site of concrete placement to the start of the delivery
line to using an external force (compressed air or water
under pressure). Cleaning is from backwards from the
site of concrete placement to the start of the delivery
line.
Recommended method of cleaning
Method of cleaning not recommended
Prohibited method of cleaning
Method of cleaning not possible
6.9.2 Delivery line
How to clean which
delivery line