56 - 5
Operation (cont’d)
4
Non-Cushioned Mode
When cushion switch
2
is switched ON, solenoid valve
6
is energised and pilot pressure 39.2 bar (40 kgf/cm
2
)
is fed to port S of cushion valve
5
.
The two cushion spools
Z
are forced into the centre by
pilot pressure so that the unrestricted oilways of the
cushion valve spools are open to the pilot outputs from
dipper remote control valve
8
.
The hot oil from port R returns to the hydraulic oil tank
via port
T
when dipper remote control lever
8
is at
neutral.
When the dipper remote control is operated, pilot
pressure from the lever to port A is fed via the left hand
cushion valve and port C directly to dipper control valve
1
. At the conclusion of lever operation the returning
pilot oil goes straight back to the lever, i.e. there is no
cushioning.
Section E
Hydraulics
9803/6410
Section E
56 - 5
Issue 1
Cushion Valves
JS02050
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...