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56 - 3
Operation (cont’d)
2
Cushioned Mode - Remote Control Lever to ‘Dipper
In’
a
Pilot pressure enters port A of cushion valve
5
from
dipper remote control valve
8
. The left hand cushion
spool
Z
and spool
Y
both move to the right.
b
The pilot pressure to the cushion spool enters
oilway
g
through the centre of the spool. It passes
spool
Y
outer surface and enters the dipper control
valve via port C.
c
The pilot return oil from the dipper control valve
enters oilway
f
via port D and the outer surface of
spool
Y
. From oilway
f
it passes the cushion spool
outer surface and returns to the hydraulic oil tank
port T.
d
Oilways
e
and
f
are shut off by the movement to the
right of spool
Y
. This causes hot oil to flow from
port R through oilway
h
to orifice
c
. Thence it flows
via port B to the dipper control valve which warms
up.
Section E
Hydraulics
9803/6410
Section E
56 - 3
Issue 1
Cushion Valves
JS02030
Summary of Contents for JS130
Page 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Page 118: ......
Page 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Page 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Page 207: ......
Page 209: ......
Page 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Page 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...