Reversing Direction Of Drum Rotation - BRADEN PD12C Series Installation Maintenance And Service Manual

REVERSING DIRECTION OF DRUM ROTATION

Motor
Case Drain
DRN
BR
In order to change the direction of rotation, 2 things must be changed on the winch. First, the motor must be made to
rotate in the opposite direction. This is done by exchanging positions of the brake valve and manifold block on the
motor. Secondly, the brake clutch assembly must be made effective for the opposite direction of rotation. This is done
by reversing the inner race of the brake clutch assembly.
Figures "A" and "B" above show typical PD12C motor installations. Note that the only difference between the two
drawings is the motor is rotated 180° (the "belly" of the motor moves to the opposite side). If the motor shaft rotates
clockwise in figure 'A" when the hoisting port is pressurized, it will rotate counterclockwise in figure "B".
1. Remove the four capscrews securing the brake
valve to the motor. Remove the four capscrews
securing the manifold block to the motor.
Disconnect the motor case drain hose at the motor.
NOTE: Some installations have the brake release
hose connected directly to the motor, instead of to
the manifold block. In this case, disconnect the
brake release hose at the motor port. Stand winch
up on drum support with the motor end up and
secure in this position.
2. Before removing the motor, it is a good idea to note
or mark the position of the motor in relation to the
winch, since it will be rotated 180° when reinstalled.
Remove the capscrews securing the motor to the
winch and carefully remove the motor.
3. Remove the brake clutch assembly from the motor
support.
(029, 034, 039, 051, 064 & 049/024 motors ONLY)
Brake Lowering
M
Motor
Valve Port
Hoisting
Port
Brake Release
Circuit
M = Manifold Block
"A"
Motor
Case Drain
DRN
Brake
Motor
Valve
BR
Hoisting
Port
Brake Release
Circuit
"B"
4. Remove the snap ring and sprag bushing retainer
from one end only of the brake clutch assembly.
5. Pull the inner race out.
scoring, wear or indentations caused by the sprag
cams. If the inner race is not completely smooth,
the assembly should be replaced.
– 34 –
Lowering
M
Port
Examine the race for