General Machine Products 70601 Adams CD Lite Winch - Manual (Page 4)

A counterbalance valve is a part of the brake system and helps to increase the responsiveness of the
brake and improve the load control capabilities of the winch. The counterbalance valve and hoses are
shipped loose in the parts box and require mounting and plumbing at the time of the winch installation.
Refer to section 3.05.
1.06 WINCH MOTOR
The winch drive consists of a hydraulic motor with a single 1.75 in. (44 mm) wide gear section. The mo-
tor is mounted to the full load brake which in turn is mounted to the gearbox. Therefore, the enclosed
drive requires no maintenance of a silent chain drive. For more information on speed and pull values
please refer to the specification sheet.
There is a case drain on the motor with a
1 /
4
NPT fitting and it should be connected to tank. For more
information see section 3.02 Hydraulic Requirements.
The control valve is a necessary component of the winch drive, however, the control valve must be or-
dered as a separate item from the winch, either from the factory or from the installing dealer.
The specifications for the control valve are as follows:
•
open center design
•
internal relief valve set at 2500 psi (17237 kPa)
•
sized for 30 gpm (114 l/min.) maximum winch flow rating with minimal pressure drop
•
spool must be of the self-centering design
A control valve that meets all the requirements for compatibility is available as a purchased option from
GMP as part number 70611. The open center control valve has the ability to be used in a ʺpower be-
yondʺ function.
There are several optional methods to control the control valve remotely. Contact the factory for more
specific information.
1.07 LEVELWIND MECHANISM
The levelwind assembly is a scaled-down version of the Adams rope winder and is a familiar sight on
Adams CD winches. The levelwind distributes the wire rope onto the drum with taut, even lays. The
tight, compact layers help to extend wire rope life by eliminating the upper layers from pulling down
into lower layers. The strain and damage to the wire rope from this action can lead to premature wire
rope failure. The levelwind also helps in maximizing the drum storage capacity. The even and compact
layers allow for more efficient wire rope storage.
The levelwind mechanism is designed in the underwind configuration and is mounted at the factory.
1.08 ACCESSORIES
The drum shaft extension is a factory option that affords a 2
7 /
16
inch (62 mm) Bell System standard shaft
diameter coupled to the winch drum shaft and extending outward through an outboard hanger bearing
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