Overview
Operation Manual - All
S
P Rock Valve Model
s
3
0
revD
a
te
Pha
s
e B
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)
reaches top dead center. If there is extra
rocking oil in the loop that the right side
differential cylinder (8A) cannot retract to the
bottom dead center position, then oil is
removed now through check valve 10D.
•
The right side differential cylinder (8A)
reaches bottom dead center. As the piston
reaches the guide bushing, it exposes a port to
the end cap of the switching valve (9A), which
becomes connected to high pressure oil (red).
The left end cap of the switching valve (9A) is
connected to low pressure oil (orange), so the
switching valve slides into the parallel
position, sending high pressure oil (red) toward
the end cap of the S3 valve (6).
•
The pressure signal reaches the S3 valve end
cap (6), pushing the valve into the cross-over
position.
•
The oil on the right end cap of the S3 valve (6)
flows back to tank (1).
•
In the cross-over position, the S3 valve (6)
routes oil from the accumulator to the port on
the right-hand rock valve slewing cylinder (5).
The cylinder begins to extend.
•
The oil from the left hand side of the rock
valve slewing cylinder (5) is routed back to
tank (1).
•
Shown in beginning position in phase B
schematic. A pilot signal (high pressure oil) is
routed from the accumulator circuit to the left
side end cap of the S2 directional control valve
(7). The S2 valve slides into the cross-over
position.
•
As the rock slewing cylinder (5) retracts,
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).
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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 ...