Schwing SP 305, Operation Manual

Page: 58 / 104

Maintenance
58 8/4/11
Operation Manual - SP 305
Unscheduled Maintenance
The following items will have to be maintained on your
pump. The time of service that you get from these parts
varies dramatically from unit to unit because of the
wide range of applications to which these machines are
subjected. Differences in concrete and pressure play a
major role in the wear of these components.
Wear parts
The cutting ring on this unit will wear with yards
pumped. The gap between the cutting ring and
transition tube (Figure 45, top) is designed to be 1/8th
of an inch. The gap can be monitored and kept in
tolerance by turning the adjusting nut on the slew lever
(Figure 45, bottom) with the 3 1/4” wrench that is
supplied or with a channel lock pliers. After the
adjusting nut is tightened all the way, the cutting ring
should be changed. Failure to maintain the 1/8th inch
gap will cause premature wear of the cutting ring and
spec. plate.
Changing rams
When you begin to see grout in your waterbox at the
end of the day, it is time to change the rams.
NOTE!
When changing rams, you will have to put
your hands in the material cylinder on
several occasions. YOU MUST TAKE THE
FOLLOWING PRECAUTIONS TO AVOID
AMPUTATION OF HANDS, ARMS AND
FINGERS:
• DO NOT REACH INTO THE MATERIAL
CYLINDER WITH THE ENGINE RUNNING.
• DO NOT USE THE REMOTE CONTROL
FOR THIS PROCEDURE! UNPLUG IT AND
STORE IT.
• DO NOT ALLOW ANYONE ELSE NEAR THE
CONTROLS WHEN YOU ARE CHANGING
RAMS.
The chances of accidental amputation are
greatly increased if more than one person is
around. There are also less distractions when you
are alone, so your attention will not become
divided. If someone comes up, stop working until
they leave.
• Please do not skip any of the above steps.
To remove the old rams
1. Start the engine.
2. Close the shut-off valve (also known as the ball
cock and quarter turn valve Figure 46).
3. Drain the waterbox.
Figure 45
Cutting ring gap (top)
Adjustment nut for cutting ring (bottom)
3 05cl s d.ep s
Figure 46
Concrete pump shut-off valve
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