General Machine Products 70524 Adams CD3 Continuous Duty Winch - Manual (Page 8)

AK 7/18/2012 ver 5
8
Recommended hydraulic line diameters are:
♦ Pump to control valve: 1¼ in. (32 mm)
♦ Control valve to tank: 1¼ in. (32 mm)
♦ Control valve through power beyond to hydraulic system: 1¼ in. (32 mm)
♦ Control valve work ports to Tri-Drive motor ports: 1 in. (25 mm)
Suggested Filtration, based on the hydraulic motor requirements, is 20 to 30 micron (nominal) filters. Consult the
filter supplier for specific filter recommendation.
The hydraulic motor case drain (¼ NPT) should be ported to tank.
There are four connections from the control valve to the motor ports. The connections to these ports are dependent
upon the configuration of the winch: either overwind or underwind: For an overwind configuration, the top ports
are the inlet ports and the bottom ports are the outlet ports. For an underwind configuration, the top ports are the
oulet ports and the bottom ports are the inlet ports. One valve spool with its two ports will control one section on
the motor. Therefore, one port of the valve spool should be connected to the top port of one motor section and the
other port of the same valve spool should be connected to the bottom port of the same motor section.
In either overwind or underwind configurations the section of the control
valve with the anti-cavitation check valves should be connected to the larger
section of the motor.
Identification of connections from the individual valve ports to the motor
ports is shown in drawing no. 30430 and the illustration shown above.
The full load brake requires a certain minimum amount of backpressure to
release. Backpressure may have to be induced dependent upon system pres-
sure.
3.03 WINCH
CLUTCH - The clutch plate is motivated by an air cylinder assembly that is mounted to the
hanger assembly. A fork is connected to the piston rod in the air cylinder and the fork contains 2 cam followers
which ride in a groove on the clutch plate. The air cylinder is plumbed to a two-position four-way directional con-
trol valve. The directional control valve is electrically operated, and is rated for 12 volts DC with a continuous duty
rating of 100%. A regulator is provided for maintaining a normal setting of 30-psi (207 kPa) supply pressure to the
directional control valve. The regulator is equipped with a Schrader valve stem to attach a pressure gauge (not
provided) to monitor input pressure to the cylinder as required.
The regulator has a
1 /
8
in. PTF port for the incoming air supply. The directional control valve and the cylinder are
plumbed at the factory. At the time of installation, the only connection required is the air supply line to the afore-
mentioned regulator port. Refer to drawing 25686.
A terminal strip is provided for the electrical connection to the directional control valve. The terminal strip is lo-
cated on the hanger assembly. A two-position switch should be used to energize the solenoids in the directional
control valve. The solenoids control the positioning of the valve spool thereby directing the airflow to the two
ports on the air cylinder. There are three screws on the terminal strip, the center screw is for connection to the
ground or common. The other two screws are for the connection to the switch. Each of the two connections from
the terminal strip should lead to one side of the two-position switch. Refer to drawing 25687 for additional details.
3.031 OPTIONAL CLUTCH POSITION SENSING
Optional clutch position sensing is available. The electrical output can be wired to a load, such as a coil in a DC
relay, and the switch in the DC relay can control a set of lights to provide the operator with an indication of clutch
engagement or disengagement.
When the clutch position sensing option is ordered, the air cylinder that actuates the clutch is equipped with a
solid-state digital output limit sensor at each end of the cylinder. When the sensor detects the magnetic piston, the
current sinking device completes the circuit by connecting the load to the ground. The sensors
B
A
Note: Spool in “in” position pressurizes A port
while spool in “out” position pressurizes B port