ELECTRICAL
4 - 3
CX EXCAVATORS
ELECTRIC / HYDRAULIC CONTROL
Operation Function Explanation
Pump Control 1) In S, H and Auto work modes current supplied to
the Electro-magnetic proportional valve built into
the pump, will control the HP requirement of
hydraulic pumps P1 and P2.
See pages
24-25
Power Boost 1) Increases hydraulic power when more force is
required for digging operations.
2) When activated in H, S and Auto work modes
main relief pressure is increased for 8 seconds.
3) Operates full in the L mode.
See pages
26-29
2-Speed Travel 4) High and Low speed travel operation is obtained
by switching drive motor swash plate angle.
See pages
30-31
Cushion (on/off)
1) Controls the pilot oil of the boom and arm spools.
2) The operator can turn off this feature.
3) Each time the machine is started, it will be in
Cushion on.
See pages
32-33
Swing Brake/
Swing Lock and
Free Swing
1) The mechanical swing brake will apply 5 seconds
after the swing hand control is returned to
neutral.
2) When swing lock is selected the brake will apply
and the swing control spool will be hydraulically
locked in neutral.
3) When free swing is selected the brake will be
released and an orifice in the motor circuit will
allow the upper structure to drift.
See pages
34-39
Lever Lock 1) Pilot pressure can be disabled by raising the gate
lever handle or raising the left console.
See pages
40-41
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