Overview
Operation Manual - All
S
P Rock Valve Model
s
28
revD
a
te
S
P Circuit Diagram
The following diagrams A through D show the
switching functions of the fully hydraulic pump control
system plumbed on PISTON SIDE with simplified
schematics. The agitator circuits are not shown.
Pha
s
e A
Please note that right and left refer to the orientation
you would have if you were looking from the trailer
hitch towards the front of the unit.
•
As soon as you start the engine, the
accumulator hydraulic pump (19) begins
pumping high pressure oil (red) to charge the
accumulators.(13).
•
Shown in the beginning position in phase A
schematic. High pressure oil (red) continues to
flow into the accumulator circuit until the
accumulators (13) are charged to the pressure
cut-off point of the accumulator hydraulic
pump (19). When the cut-off point is reached,
the accumulator pump reduces the hydraulic
oil flow until there is just enough to maintain
the cut-off pressure.
•
The high pressure oil (red) from the
accumulator circuit flows through the S3
directional control valve (6), which is in the
parallel position, into the right-hand rock
slewing cylinder port(5).
•
The rod of the rock slewing cylinder (5) fully
extends to the right, if not already extended.
•
The S1 directional control valve (4), which
controls whether the unit pumps in forward,
neutral, or reverse, is put into the forward
position by energizing one of the coils on the
solenoid valve(20).
•
A pilot signal (high pressure oil) is routed from
the accumulator circuit to the end cap of the S2
directional control valve (7), which moves into
the parallel position.
•
High pressure oil (red) flows from the main
hydraulic pump (2) through the parallel
position of the S2 valve (7) into the piston side
of the left hand differential cylinder (8A). The
cylinder extends, pushing concrete out of the
material cylinder, through the rock valve, and
into the pipeline. (This is called the pressure
stroke.)
•
The oil that is forced out of the rod side of the
right differential cylinder (8A) flows through
hoses into the rod side of the right differential
cylinder (item 8B). This oil is called rocking
oil (orange).
•
The rocking oil forces the right side
differential cylinder (8B) to retract, which
creates a vacuum in the material cylinder. The
right side material cylinder fills with concrete.
(This is called the suction stroke.)
•
The oil from the piston side of the right
differential cylinder (8B) is routed back to the
tank.
•
The oil shown as blue, such as the oil in the
reservoir, is at rest, or pressureless.
Home
TOC
TOC
Содержание 30100750
Страница 8: ...Table of Contents Operation Manual All SP Rock Valve models viii revDate Home TOC TOC Print Print ...
Страница 14: ...Introduction Operation Manual All SP Rock Valve Models 12 revDate NOTES Home TOC TOC Print Print ...
Страница 70: ...Overview Operation Manual All SP Rock Valve Models 68 revDate NOTES Home TOC TOC Print Print ...
Страница 100: ...Operation Operation Manual All SP Rock Valve Models 98 revDate NOTES Home TOC TOC Print Print ...
Страница 126: ...Maintenance Operation Manual All SP Rock Valve Models 124 revDate NOTES Home TOC TOC Print Print ...
Страница 159: ...Alphabetical Index Operation Manual Line pumps ALPHABETICAL INDEX swg99a001 eps Home TOC TOC Print Print ...
Страница 164: ...Alphabetical Index Operation Manual All SP Rock Valve Models 162 revDate Home TOC TOC Print Print ...