Schwing SP 305, Operation Manual

Page: 28 / 104

Operation
28 7/27/12
Operation Manual - SP 305
sand coming out. When a ready-mix truck has worn-
out fins, the concrete does not always become well
mixed. The bulk of the load will be pumpable, but the
first and last chute full will not pump. If you are
allowed to, have the ready-mix driver put the chute to
the side and dump the first chute full on the ground;
then bring the chute back to your hopper when the
concrete looks good. It’s important to have good
concrete until the pipe is completely filled, so if the
mix doesn’t look pumpable, don’t put it into your
machine. This is something that becomes easy to see
with experience. Many times, water will have to be
added to the concrete in the truck to make the
consistency that is desired for the job. Find out from
the job supervisor if the slump is correct and who has
the authority to add water to loads as they arrive.
Ready the pump
The pump can be operated at the control panel or with
the remote control box. When operating, you must be
able to see both the pump and the point of discharge. If
you cannot see one or the other, a spotter must be used.
Use the remote control if it allows you to get a better
view of the job. If you decide to use the remote control,
you should get it ready and plug it in now.
•
To use the remote control, first select “off” with the
“local/remote” switch (Figure 16).
• Plug in the remote cable; then select remote on the
control panel switch. On - off , and forward -
reverse control is now transferred to the remote
box switch (Figure 17).
• Select a low to low-medium setting on the volume
control knob. This will make the concrete move
slowly through the line, which reduces the chance
of plugs or trapped air (Figure 18).
Mix your slurry
When the concrete is right, mix your lubricating slurry
and pour it into the hopper or delivery system
(depending on whether you are mixing commercial
slurry or portland cement and water). If you have
poured the lubrication into the delivery system, be sure
to reconnect the system to the pump.
Beginning to pump
• Have the ready mix driver fill the hopper with
concrete, and stop when the hopper is full.
• Clear the discharge area of personnel before
starting the pump for the first time of the day, after
you’ve moved, or anytime air has been introduced
into the line or the line has been taken apart.
loc
a
lremote
.ep
s
98 3 47087
Ho bbs
I
QUARTZ
0 0 0 0 0 0
HOUR S
0
10
20
3 0
40
RPM
X 1000
Local/remote
Loc a l ( u p po s ition)
-Off- (center po s ition)
Remote (down po s ition)
Figure 16
Select OFF before plugging or
unplugging the remote cable
Figure 17
The remote cable
Remote Cable Plu g
remove d u mmy pl u g a nd
in s ert thi s pl u g into recept a cle
remoteboxWreel.eps
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