Schwing SP 305, Руководство по эксплуатации

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Appendix
SP 305
Startup 250:Users:Danny:Desktop:Operation manuals:line pumps:maverick
(P305):Appendix.fm
Operation Manual -
87
Decibels
A measurement of volume equal to one tenth of
a bel, abbreviated dB. As it applies to concrete
pumps, it is a measurement of the sound pres-
sure level one meter away from a noise source.
Because constant exposure to loud sound can
cause permanent hearing loss, OSHA has devel-
oped guidelines for time limits on exposure to
sound at different volumes. The chart is in sec-
tion 8.14 of the
Safety Manual.
Drive Engine
The primary source of power for a hydraulic sys-
tem. Typically, the word
engine denotes an inter-
nal combustion device, whereas the word motor
denotes an electrical device. See also: Prime
Mover
Electrocution
Made by combining the words “electric” + “execu-
tion.” It means “death by electricity.”
See also:
Conductors
EN 287-1 / PREN 288-3
The code for structural welding with steel as
defined by the European Norm.
See also: Certi-
fied Welder
Expert
As used in this safety manual, an expert is
defined as a person who, on the basis of special-
ized training and experience, has developed a
high degree of knowledge and skill in the areas
of concrete pumps, concrete pumping, cleanout
procedures, generally accepted engineering
norms, and safety regulations to the extent of
being able to evaluate equipment and processes
as they relate to job safety. Experts demonstrate
their knowledge and abilities by passing the certi-
fication testing and experience requirements of
the American Concrete Pumping Association.
Other experts may include master mechanics
and after-sales service technicians of the manu-
facturer.
See also:
Certified Operator
Fast Switch
A secondary hydraulic circuit added to single-cir-
cuit machines to disable the stroke limiter during
the switch of the Rock Valve cylinder, thereby
making the Rock Valve switch quickly. This circuit
is not needed or available on twin-circuit
machines.
Foreign Material
Material that was never intended to be pumped
but ends up in the concrete hopper. Examples of
foreign material include small animals, hammers,
ready-mix truck fins, unmixed clumps of cement,
hardened concrete that breaks away from ready-
mix truck fins, and soft drink cans. Many of these
items can create a blockage if they are pumped
through the system.
Go Devil
A plug made from a rubber composite, usually
with several fins that expand to seal when pres-
sure is applied.
Go devils are intended to be
inserted in a steel delivery pipeline and pushed
with water or compressed air for the purpose of
cleaning the pipe. Not to be used with rubber
hose or short sections of pipe.
See also: Sponge
Ball
Guide
An assistant brought in to help with backing up a
truck or trailer or with other circumstances in
which the driver cannot see enough to ensure
safety.
See also:
Spotter
High Voltage
For the purposes of this manual, any current over
120 volts AC is considered high voltage. In the
United States, electrically driven concrete pumps
normally operate the motors at 480 volts AC
(high voltage) and the controls at 24 volts DC
(low voltage). With electric wires in residential or
industrial areas, the voltage is approximately
8000 volts to ground or 13,800 volts from phase
to phase (distribution voltage). When dealing
with electric wires that are mounted high above
the ground on steel towers, the voltage ranges
from 100,000 to 1,000,000 volts (transmission
voltage).
Hopper Grate
A meshwork typically made from steel bars and
placed over the concrete hopper. It serves to
keep human body parts away from the agitator
(when left in its proper position) and to keep
large foreign objects from falling into the hopper,
which could cause blockages if they were
pumped. The hopper grate
must be secured in
position in order to be effective.
Jacking the Outriggers
Adjustment of the outriggers in the vertical direc-
tion. With boom-mounted concrete pumps, you
should strive to make the adjustments so that the
unit sits within 3° of level.
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