Buhler 2180 - Manual (Page 130)

SECTION 2 - OPERATION
2-84
CONNECTING SINGLE-ACTING
CYLINDERS
Connect the hose from a single-acting cylinder to the
left extend/raise coupler on the remote control valve,
as previously described.
To extend a single-acting cylinder, pull the control
switch back to the “extend” position.
Manually return the switch to the neutral position to
stop the cylinder before it is fully extended or allow
the valve to return to neutral automatically when the
cylinder reaches the end of its stroke and timed
operation.
To retract a single-acting cylinder, move the switch
fully forward to the “float” position.
IMPORTANT: Always use the “float” position to lower
a single-acting cylinder. The “retract” position is for
double-acting cylinders only.
CONNECTING DOUBLE-ACTING
CYLINDERS
Connect the feed hose from a double-acting cylinder
to the left extend/raise coupler on the remote control
valve and the return hose to the right retract/lower
coupler, as previously described. To extend a
double-acting cylinder, pull the control switch back to
the “extend” position.
To retract a double-acting cylinder, push the control
switch forward past neutral to the “retract” position.
Further forward movement of the switch will select
“float” which will allow the cylinder to extend or retract
freely. This feature is very helpful when carrying out
work with equipment such as scraper blades and
loaders.
OPERATING CONTINUOUS FLOW
HYDRAULIC EQUIPMENT
Continuous flow hydraulic equipment (e.g., hydraulic
motors) should be connected to the 1st (lowest)
remote control valve couplers with the pressure hose
connected to the right retract coupler and the return
hose connected to the low pressure return circuit as
described previously in this section.
NOTE: For very low flow hydraulic motors, it may be
necessary to use the non-load check couplers (3rd or
4th couplers up.)
The first valve has priority over the remaining valves.
This will ensure a constant flow of oil to the motors.
Use the flow control to regulate the motor speed.
The #1 flow control should be adjusted to
regulate the orbit motor speed. If the flow control
is open too far, the 3-point hitch and other remote
valves will slow down or stop. This will ensure
that the hydraulic system will only supply the oil
required by the motor. Extra pump capacity will
not be used except when other remote valve
sections are operated.
With the remote control valve switch fully forward in
the “float” position, the motor will be stationary. The
hydraulic motor will operate if the switch is pulled
back to the “retract” position. To stop the motor, move
the switch from the retract position to the float
position. In the float position the motor will be able to
stop slowly, which will not damage the motor.
IMPORTANT: When operating continuous flow
equipment, the remote control valve switch must not
be moved rearward to the neutral or raise positions
as damage to the equipment may result.
Observe the following to further protect the tractor
and equipment.
• Do not open any bypass valve in the equipment
or motor. Use the flow control to regulate the rate
of flow or speed of the motor.
• Do not hold the remote control valve switch to
operate the equipment.
• To ensure optimum hydraulic oil cooling, operate
continuous flow equipment at the highest flow
setting (by use of the flow control) and lowest
engine speed that will give the required machine
performance and speed.
• Do not use the #1 valve circuit to operate
continuous flow equipment that requires more
than 137.90 bar (2,000 PSI). The #1 flow control
may shut the rest of the system down if the
continuous pressure is too high. Connect these
loads to any other valve section.