General Machine Products CD-28 Adams Manual - Manual (Page 6)

6
CALIPER BRAKE
ASSEMBLY
INSTALLATION The primary brake assembly P/N 17134 will be mounted at the factory on the left
side, top surface of the forward winch frame rail using mounting bracket -P/N
15277 with four bolts, nuts and lockwashers.
The brake disc P/N 24117 will be mounted at the factory on the outboard surface of
the left side drum flange using eight machine screws.
The remote actuator P/N 17135, reservoir P/N 17136 and flexible hose section P/N
17137 are shipped loose with other winch mounting hardware. These components
are initially installed in the field by the dealer.
The remote actuator is normally mounted at the rear of the body, under the tail-
shelf. Find a location that is safe and convenient to the operator and within sight of
the winch operation. Alternate mounting would be in accordance with end user
specifications.
The reservoir is mounted above and as close as possible to the inlet fitting of the
actuator.
The flexible hose section is connected to the outlet fitting of the actuator.
At the time of installation and prior to operation, refer to information received with
each brake component and hydraulic schematic drawing 230-1700.
The closed circuit hydraulic system is shipped void of any oil. Prior to operation,
fill the system with brake fluid; bleed and add fluid as required.
The caliper brake pads P/N 25237 are adjusted at the factory. Subsequent adjust-
ment will be required to compensate for normal wear. See the Model CD Winch
Parts Book for component identification.
AUTOMATIC BRAKE The automatic brake, located on the left side above the winch, is an automatic de-
vice designed to hold a maximum load of five thousand pounds.
The brake mechanism consists of a double threaded worm and worm wheel, an
overrunning clutch and a multiple disc type friction brake. The latter operates in a
bath of oil to aid in the dissipation of heat.
When the winch is operated in the pull-in direction, the brake is inoperative since
the input shaft runs freely in the overrunning clutch. When the power is cut off, the
load attempts to drive the drum in the opposite direction. This causes the sprags in
the overrunning clutch to lock, forcing the worm wheel to drive the worm. The
multiple disc brake on the worm shaft supplements the braking action. The pressure
on the brake plate determines the load holding capabilities.
Removal of the automatic brake cover will locate four studs, springs, nuts and
washers. The amount of compression of the four springs is in direct proportion to
the amount of braking effort that will be achieved. Torque the four nuts until the
winch will support a maximum braking load of five thousand pounds or less to sat-
isfy your particular requirement.
When making a brake adjustment, the springs must be compressed equally or the
resultant braking action will be erratic. To obtain an initial brake setting with opti-
mum holding action, it is recommended that the four nuts be rotated until contact is
made with the washers and springs. Then rotate the four nuts equally an additional
one and one half turns. Check for the maximum braking action of five thousand
pounds or less for your particular requirement.
Braking action will be increased by rotating the nuts in a clockwise direction. Con-
versely, braking action is decreased by rotating the nuts counter-clockwise.