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435/485/535
3-85
Manual-Programmable Operation
Rocker switch (1) is used to select either the manual
or programmed operation for each of the remote
control levers.
Manual Operation
Manual operation is provided primarily for the operation
of continuous flow applications, such as hydraulic
motors. To operate the remote EHR valves in manual
mode, depress the top of rocker lever (1) as shown.
In the manual mode, the control lever (2) can be
operated in the four positions, neutral, extend, retract
and float. When the control
lever is left in either the
extend, retract or float positions the control lever WILL
NOT automatically return to the neutral position and
shut the flow of oil off to the rear remotes regardless
if the system reaches maximum pressure. The control
lever must MANUALLY be returned to neutral.
In manual operating mode there is no automatic
return to neutral. This allows for efficient operation
of motors without nuisance shut downs when the
remote valve inadvertently returns to neutral. When
operating hydraulic motors it is important to always
use the RETRACT position to activate the motor and
the FLOAT position to stop the motor. Using the float
position to stop the motor allows the motor to come
to a gradual stop preventing any damage to the motor
itself.
IMPORTANT: Never use the neutral position from the
extend or retract position to stop a hydraulic motor.
Sudden hydraulic lock up of the system can cause
extensive damage to the motor.
IMPORTANT: Do not operate the control levers in
the manual mode when operating remote cylinders.
When the cylinder has reached the end of its stroke
the control lever will not return to neutral and the
hydraulic system relief valve will be activated. This
will overheat the oil and may lead to failure of the
hydraulic and driveline components.
Programmable Operation
Programmable operation is provided primarily for
operation of hydraulic cylinders. This feature allows
the operator to program a time delay between when
the control levers are activated and when they will
automatically return to neutral. To operate the remote
EHR valves in programmed mode, depress the bottom
of rocker switch (1) as shown.
F3-107
ON
N
N
1
2
Section 3 - Operation
Hydraulic Operation - Electro-hydraulic