ELECTRICAL
4 - 2
CX EXCAVATORS
RPM CONTROL
Operation Function Explanation
Throttle Motor
(CX130/CX160)
1) Engine speed on the CX130/CX160 excavators
is adjusted with a stepper motor.
2) The stepper motor is controlled by the controller
through the throttle driver.
3) The throttle motor requires calibration.
See pages
2-3
Engine RPM
Control
1) Engine speed on the CX210/CX240 excavators
is controlled by the engine controller.
See pages
6-7
Idling Control 1) The operator can select one touch idle, or he can
select auto idle.
2) Auto idle time can be programmed from 1 to 30
seconds.
See pages
8-9
RPM Control for
Each Mode
(H,S,L, and Auto)
1) Maximum rpm is obtained by selecting H mode.
2) S mode speed is 200 rpm less than H mode.
3) L mode speed is 300 rpm less than H mode.
4) Auto mode speed varies between S mode speed
and L mode speed
5) Idle speeds are stored permanently in the
controller memory
See pages
10-19
Engine Auto
Warm-up
Increases engine rpm by steps over a 15 minute
period if:
1) Water temperature is below 50°C
2) Hydraulic functions or throttle are not operated
for 12 seconds.
3) One touch idle is off.
4) If the throttle is moved or any hydraulic function
is operated, auto warm-up is canceled.
See pages
20-21
Breaker
Revolution
Control
1) When the breaker pressure switch is
hydraulically closed, the engine rpm will
decrease to a preset speed.
2) The throttle control knob speed setting must be
set higher than the preset speed.
See pages
22-23
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