General Machine Products 70530 Adams WG Winch - Manual (Page 8)

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Recommended hydraulic line diameters are:
● Pump to control valve: 5/8 in. (16 mm)
● Control valve to tank: 5/8 in. (16 mm)
● Control valve through power beyond to hydraulic system: 5/8 in. (16 mm)
● Control valve work ports to hydraulic motor ports: 5/8 in. (16 mm)
● Pump to two-position, three-way selector valve for high speed feature: 1/4 in (6.4 mm)
● Two-position, three-way selector valve to pilot control valve for high speed feature: 1/4 in (6.4 mm)
Suggested Filtration, based on the hydraulic motor requirements, is 10 micron (nominal) filters. Consult a filter
supplier for specific filter recommendation.
There are two connections from the control valve to the motor ports.
In order for the winch to operate correctly, connect the output from the control valve to port A of the motor, the port
farthest from the winch, and connect the return from the control valve to port B, the port closest to the winch.
Identification of connections from the individual valve ports to the motor ports is shown in drawing # 28824 on
page 19 and the illustration shown on previous page.
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. NPTF 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 on page 21.
A terminal strip is provided for the electrical connection to the directional control valve. The terminal strip is located
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 com-
mon. 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 on page 20 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 are magneti-
cally activated and while they work on the same principle as Hall effect sensors, they are exceedingly sensitive.
The sensors are 100% solid-state devices with no moving parts to wear, break, bounce or stick and they are fully
encapsulated in plastic resin.
The sensors must be wired as per drawing no. 25777 on page 23. Since the sensors detect the magnetic piston
in the air cylinder and not the switch used to activate the directional control valve, even manual actuation of the
clutch is detected by the sensors.
Warning - Reverse wiring will destroy the solid-state electronic components in the sensors.
The hydraulic motor case drain port must be ported to tank using a separate, dedicated
hydraulic line. Failure to do so could result in improper winch operation.