Appendix
SP 305
Startup 250:Users:Danny:Desktop:Operation manuals:line pumps:maverick
(P305):Appendix.fm
Operation Manual -
89
PTO (
Power Take Off)
A switchable output from the transmission or an
intermediate gearcase. On a concrete pump, the
PTO is used to divert the power from the engine
and drive train to turn the hydraulic pumps.
Qualified Operator
An individual who meets all the following qualifi-
cations:
• reached the age of 18
• is physically and mentally capable
• has been trained in the proper operation
and maintenance of the pump and placing
boom, if applicable
• has demonstrated his or her capabilities to
the hiring company with respect to the
operation and maintenance of the pump
and placing boom
• can be expected to perform assigned
duties in a reliable manner
Qualified Personnel
A generic term used to describe people who are
qualified to do work in their area of application.
For example, having your boom repairs
inspected by “qualified personnel” before use
refers to inspection by a certified welder or certi-
fied welding inspector. Having repairs to your
hydraulic system done by “qualified personnel”
would refer to repairs made by qualified work-
shop personnel.
Qualified Workshop Personnel
An individual who meets all of the following quali-
fications:
• has reached the age of 18 years
• is physically and mentally capable
• has been trained in proper repair, mainte-
nance, and inspection procedures plus the
pertinent safety rules for concrete pumps
and related equipment
• has demonstrated their capabilities to their
company with regard to the procedures
and rules discussed above and
• can be expected to perform assigned
duties in a reliable manner
Rock Jam
A specific type of blockage caused when the
cement and fines of the concrete are not present
in sufficient quantity to fully coat the larger aggre-
gates and the walls of the delivery system. In
these cases, the rock (larger aggregates of the
mix) form a wedge inside the pipe. Resistance to
movement then becomes overpowering, and the
concrete stops. Increasing pressure to try to
remove the wedge only results in forcing more of
the finest particles past the rocks, compounding
the problem. In some cases, the wedge can be
broken up by alternately pumping in forward and
then reverse.
See also:
Blockage
Separate Pipeline
A pipeline, other than the placing boom pipeline,
that is laid between the concrete pump and the
point of discharge.
Shutoff Valve
In hydraulics: a valve with the ability to stop the
flow or pressure of hydraulic oil. Must be able to
withstand the maximum pressure of the hydraulic
circuit that it controls. In concrete: A manually or
hydraulically operated valve that prevents the
flow of concrete in either direction. Some con-
crete shutoff valves also have the ability to divert
the flow of concrete to a different pipeline; for
example, to a discharge point for cleanout. The
shutoff valve must be able to withstand the maxi-
mum pressure on the concrete of which the
pump is capable.
Single Circuit
The plumbing method used for the pumpkit in
which both the differential cylinders and the Rock
Valve cylinder are moved by the main hydraulic
pumps. Single-circuit machines are not equipped
with an accumulator.
Soft Switch
A secondary hydraulic circuit added to twin-cir-
cuit machines to account for the oil coming from
the main hydraulic pumps while the Rock Valve is
being switched by the oil from the accumulator.
Soil Pressure
The force per square area that is exerted on the
ground by the outrigger legs. The amount of
pressure that the soil will support varies with the
composition and compaction of the soil. To deter-
mine the stability of the soil, see the chart in sec-
tion 5.16 of this manual.
Sponge Ball
A medium-to-hard, spherical sponge used to
clean the inside of delivery pipelines.
See Also:
Go Devil
Spotter
A spotter is a person who stands at a vantage
point where he or she can see both the point of
discharge and the pump operator. The spotter
uses two-way radios or hand signals to direct the
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Содержание SP 305
Страница 10: ...Introduction Operation Manual SP 305 10 8 4 11 NOTES Home TOC Home TOC Print Print...
Страница 14: ...Specifications Operation Manual SP 305 14 8 4 11 NOTES Home TOC Home TOC Print Print...
Страница 20: ...Safety Operation Manual SP 305 20 8 4 11 NOTES Home TOC Home TOC Print Print...
Страница 38: ...Operation 38 8 4 11 Operation Manual SP 305 Home TOC Home TOC Print Print...
Страница 100: ...Appendix Operation Manual SP 305 100 revDate NOTES Home TOC Home TOC Print Print...
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