General Machine Products 70524 Adams CD3 Continuous Duty Winch - Manual (Page 4)

AK 7/18/2012 ver 5
winch. The brake disc rotor is mounted at the factory on the clutch end drum flange.
The remote actuator, reservoir, and flexible hose section are shipped loose with other winch mounting hardware in
the parts box. These components are to be installed by the dealer or truck body builder. The closed circuit hydrau-
lic system is shipped void of any fluid. Prior to operation, fill the system with only the exact type of fluid that was
originally specified for your winch. This will be so designated on the caliper brake components and will be brake
fluid only on specific units or hydraulic oil only on specific units. Bleed and replenish with additional fluid of the
correct formulation, as required. Refer to section 3.04 of this manual.
1.05
FULL LOAD BRAKE - The full load brake, which is mounted on the gearbox, is an automatic device
designed to hold the rated load of the winch, 24,000 lbs. (106,8 kN), on a bare drum. The full load brake assembly
is spring-loaded and requires hydraulic pressure to release the brake. The hydraulic pressure is applied on the pis-
ton, which exerts the force on the primary disc compressing the springs into the brake housing. When the disc
stack (comprised of both rotating and stationary discs) is not compressed, the rotating discs are free to turn and the
brake is released. The pressure to release the brake is sensed at the hydraulic motor. The pressure from either side
of the motor can release the brake. This feature enables the winch to pull in as well as power out, i.e. the brake is
not direction sensitive. Hydraulic pressure passes through three cartridge type shuttle valves diverting pressure to
release the brake as well as relieving the pressure on the brake after the system pressure is ported to the tank. The
plumbing for both the shuttle valves and the brake is completed at the factory. Refer to section 3.05.
1.06 TRI-DRIVE
THREE-SPEED TRANSMISSION - The three-speed transmission consists of a hydraulic
motor with two unequal size gear sections. The larger section has a 2-inch wide gear face and the smaller section
has a 1¼-inch wide gear face. A two-spool control valve activates each section independently or in tandem to
achieve three distinct ranges of speed and pull. The motor 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.
The same transmission is used in both overwind and underwind applications. The only change is the plumbing
connections to the control valve. There is a case drain on the motor with a ¼ NPT fitting and it should be con-
nected to tank. For more information, see section 3.02 Hydraulic Requirements.
The control valve is considered an integral part of the engineered winch package and is shipped with each winch.
The control valve has an internal relief valve set at 2500 psi (17238 kPa). (Isolated protection of the winch motor
to 2000 psi is no longer required.) The open center control valve has the ability to be used in a "power beyond"
function.
There are several optional methods to command the control valve remotely using pendant or wireless control pan-
els. Contact the factory for more specific information.
1.07
LEVELWIND MECHANISM - The levelwind assembly is a derivative of Bell System specification
8414 and is a familiar sight on Adams CD winches. The levelwind distributes the wire rope onto the drum with
tight, even lays. The tight, compact layers help to extend wire rope life by eliminating the upper layers from pull-
ing 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 is mounted at the factory and can be configured to support either overwind or underwind applica-
tions.
1.08 ACCESSORIES
- The drum shaft extension is an accessory that makes the CD3 winch even more versa-
tile. The shaft extension has a diameter of 2 7 /
16
inch (Bell System standard) and is mounted on the winch drum
shaft by means of a coupling secured by a connecting pin. Designed with the conventional bayonet type of con-
nection, it is ideally suited for driving a power reel or capstan.
To mount a device onto the shaft extension, slide the device spindle over the shaft extension, push all the way in,
turn counter clockwise and pull out into the locked position.
The drum shaft extension projects from the right side of the winch only. The required shaft length is determined
by the width of the body.
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