Overview
Operation Manual - All
S
P Rock Valve Model
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3
4
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Pha
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e D
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.
•
The right side differential cylinder (8B)
extends to top dead center. The right side
differential cylinder (8A) approaches bottom
dead center.
•
If there is not enough rocking oil to completely
extend cylinder 8A, rocking oil will now be
added through check valve 10C.
•
When the left side differential cylinder is in the
top dead center position, pressure is applied to
the right end cap of the switching valve (9B).
The left end cap of the switching valve is
connected to low pressure, so the valve slides
into the parallel position. The switching valve
routes the pilot signal to the right side end cap
of the S3 valve (6).
•
The S3 valve (6) moves to the parallel position
in response to the pilot signal. The oil in the
left side end cap of the S3 valve (6) escapes to
tank.
•
High pressure oil (red) is routed from the
accumulator circuit through the S3 valve (6) to
the extend port of the rock valve slewing
cylinder (5).
•
The rock valve slewing cylinder (5) extends to
the right, sending the retract side oil back to
tank (1) through the S3 valve (6).
•
As the rock slewing cylinder (5) extends,
pressure in the accumulator circuit falls. When
it drops below the set point of the accumulator
hydraulic pump cut-off pressure, the
accumulator hydraulic pump (19) increases the
flow of hydraulic oil to charge the accumulator
circuit (13).
•
At the same time that the rock valve cylinder is
extending, a high pressure pilot signal is sent
to the right end port of the S2 spool. It slides
into the parallel position. When it has
completed the travel, oil is routed from the
main pump (2) to the rod side of the right hand
differential cylinder (8A).
This brings us back to phase A. The machine has made
one complete cycle, which consists of two suction
strokes and two pressure strokes.
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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 ...