ELECTRICAL
4 - 30
CX EXCAVATORS
ELECTRIC/HYDRAULIC
2–Speed Travel, All Models
1) The machine will default to low speed when the key switch is turned ON.
2) When high speed is selected the swash plates in the travel motors is shifted to minimum
angle. (see section 4)
3) Travel speed will shift into low speed automatically when the pump pressure reaches
approximately 4200 psi (see section 4). The instrument panel display does not change.
Note: The controller needs a rpm signal and the travel pressure switch for high speed travel.
When the key switch is positioned in the “ON” position, low-speed is selected by default.
Each time the speed switch is pressed, the controller registers a signal (0 volt). The controller
changes travel speed in the following sequence Lo_Hi_Lo and transmits the changes to the
instrument panel screen (LCD).
Travel speed Lo selected
The output from the controller to the travel speed solenoid is OFF.
Travel speed Hi selected
The output from the controller to the travel speed solenoid is ON (24v). Pilot pressure is sent
to the 2-speed spool in the travel motors and high speed is achieved. When pressure P1 or
P2 is lower than 580 psi the controller will deactivate the travel speed solenoid (1
st
speed).
When pressure P1 or P2 rises above 580 psi the controller will reactivate the travel speed
solenoid valve (2
nd
speed). High speed travel can be forced (for cleaning tracks) by holding
the travel speed switch pressed for over 2 seconds.
When the travel pressure is higher than 4200 psi, travel motor 2-speede spool is shifted and
the swash plate shifts back to the low speed position (1st speed).
When the attachment controls are operated, travel speeds can not be changed.
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