General Machine Products 70530 Adams WG Winch - Manual (Page 3)

Page 3 of 28 www.gmptools.com
SCOPE - This document contains information pertinent to the Installation, Operation and Maintenance of the Ad-
ams® Model WG Worm Gear Winch. The WG winch manufactured by General Machine Products Co., Inc. com-
mencing in January 1, 2005 differ significantly from prior generations of Adams Winches in equipment design and
components. To obtain information on earlier model CD, LCD or UG winches, please see our website at
www.gmptools.com.
1.00 GENERAL
- The information contained in this revision pertains exclusively to the Adams ® Model WG
Winches manufactured after January 1, 2005 which have serial numbers of 05-3000 and higher.
1.01 WINCH
APPLICATION - The winch has been specifically designed for placing communication cable and
electrical conductors. However, its robust construction makes the WG suitable for most applications where an
intermittent pull is required. Worm gear winches are designed and intended for intermittent duty application only;
using them in extremely long pulls may generate excessive heat and shorten the life of the winch.
CAUTION -THE WINCH WAS NOT DESIGNED FOR, NOR INTENDED TO BE USED FOR THE MOVE-
MENT OF PEOPLE. NEVER USE THE WINCH FOR MOVING PEOPLE.
In the typical automotive application, the winch is driven hydraulically. The truck engine provides the prime
source of power connected through a split shaft or side mount power take-off to a hydraulic pump. The pump pro-
vides hydraulic pressure and flow sufficient to drive the winch hydraulic motor that is coupled to the worm gear
and load holding brake. The load holding brake and motor are coupled directly to the winch gear box.
1.02
WINCH MAJOR COMPONENTS
1.03
WINCH CLUTCH GENERAL INFORMATION - The clutch provides a means of transferring the torque
from the drum shaft to the winch drum. The clutch plate is actuated by an air cylinder. When the winch clutch is
disengaged, the drum will rotate freely on the drum shaft. Power can still be transmitted through the drum shaft
to the drum shaft extension to drive a capstan or reel while the clutch is disengaged. To help determine clutch
position, engaged or disengaged, electronic clutch position sensing is an available option. See section 3.03.
1.04
CALIPER TYPE, FREE SPOOL CONTROL (DRAG) BRAKE - Under rapid winch line payout conditions,
it is extremely important to operate the caliper brake properly, taking care to maintain sufficient tension on the
wire rope. This will enable the level-wind assembly to operate properly, minimize over-spinning of the drum, and
help to prevent erratic lays of winch line on the drum.
All WG units are factory equipped with a caliper type drag brake assembly. The caliper brake is controlled by a
hydraulic actuator (supplied) that is intended to be mounted with the winch controls.
The purpose of the caliper brake is to control the speed of the winch drum when in the free spool mode. Move-
ment of the actuator lever will force the brake pads together, applying friction to the drum brake rotor thereby re-
ducing the drum speed. Continued movement of the control lever will eventually force drum rotation to
stop.
CAUTION THE DRAG BRAKE IS USED TO CONTROL THE DRUM SPEED IN FREE SPOOL ONLY.
IT IS NEVER TO BE USED TO HOLD THE LOAD.
The brake assembly is mounted at the factory on two studs attached to the hanger on the right side of the winch.
The brake disc rotor is mounted at the factory on the clutch end drum flange.
● Gearbox ● Full Load Holding Brake
● Wire Rope Drum ● 2 Speed Hydraulic Motor
● Clutch Assembly ● Hanger
● Free Spool Control Brake ● Drum Shaft Extension
● Level Wind Assembly