56 - 2
Operation
Whenever the machine ignition is first switched on, the
dipper and boom circuits default to the cushioned mode i.e.
solenoid valve
6
is de-energised.
The following descriptions deal only with the ‘dipper in’
function, but the ‘dipper out’, ‘boom in’ and ‘boom out’
circuits operate in exactly the same way.
1
Cushioned Mode - Remote Control Lever in Neutral
When the remote control lever is in neutral the hot oil
taken from the oil cooler line enters port R of cushion
valve
5
and flows through the centre of spool
Y
to
oilways
e
and
f
.
From oilways
e
and
f
, oil flows via the outer surface of
the cushion spools and returns to the hydraulic oil tank
via port T.
Section E
Hydraulics
9803/6410
Section E
56 - 2
Issue 1
Cushion Valves
JS02020
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...
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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...